Full Research

StageFR
Project No.14200119
Project NameBiodiversity-driven Nutrient Cycling and Human Well-being in Social-Ecological Systems
Abbreviated TitleEcological Recycling Project (e-REC Project)
Project LeaderOKUDA Noboru
Research AxisProgram 2: Fair Use and Management of Diverse Resources / Diversity Program
Key WordsBiodiversity, Ecosystem service, Human well-being, Nutrient balance, Watershed governance

 

○Research Subject and Objectives

Since the Anthropocene, overexploitation of basal resources due to mass production has led to disturbance of natural biogeochemical cycles of macronutrients, such as nitrogen and phosphorus, in watersheds (Sutton et al. 2013). Such nutrient imbalances have caused serious environmental problems, contributing to cultural eutrophication and water pollution (Smith and Schindler 2009). The nutrient imbalances also skew biological communities toward overwhelming superiority of nuisance species, as in the case of harmful algal blooms. The anthropogenic disturbances in the nutrient cycling result in deterioration of ecosystem services in quality and quantity through the loss of ecosystem functions provided by biodiversity (Anderson et al. 2002; Hoagland et al. 2002). At present, it has been recognized that nutrient imbalances and biodiversity loss are so common and prevalent throughout the planet, posing a risk to sustainable human development (Rockström et al. 2009). These are considered global environmental issues, while their causes and effects vary among watersheds, in which there exist a variety of social issues specific to local communities.

In the top-down oriented watershed management, in general, researchers elucidate causality of nutrient imbalances based on scientific data, while governments take institutional, technological and economic approaches based on rationality to reduce nutrient loadings for public health. However, the modern issues related to nutrient imbalances are complicated and elusive not only because much of nutrients are loaded from non-point sources such as agricultural wastes but also because a driver of nutrient resource exploitation is often remote from the source of nutrient loading. With the increasing complexity of society, the top-down oriented watershed management solely has difficulty in inclusive solution of diverse issues related to nutrient imbalances.

Researches on watershed management and governance tend to assess how institutions, technology and politics can improve environmental deterioration at the watershed scale (Abell et al. 2002; ILEC 2005), often neglecting individual and community viewpoints. By contrast, many community-based researches have regarded socioeconomic and ecological settings as constraints for local communities and neglected feedbacks from community actions to a larger social-ecological system (but see Ostrom 2007, 2009).  A limited number of researches have explicitly treated with interactions between local and watershed scales, focusing on ‘watershed’ as a spatial unit in which waters and nutrients are cycled (Bressers and Kuks 2004; RIHN Project 3-1 2007; Wada 2009). However, a common goal is needed for multi-stakeholders at multi-organization levels to be involved in the solution of diverse issues both at local and watershed scales. Expanding the concept of ‘adaptive governance of social-ecological systems’ (Folke et al. 2005) to watershed systems, we aims to develop a method of ‘adaptive watershed governance’, in which the stakeholders are involved in enhancement of three components, biodiversity, nutrient cycling and well-being, all of which are essential to social-ecological health of watershed system. For this purpose, two approaches are taken for the adaptive watershed governance: one is institutional, technological and economic (ITE) approach by governments to solve issues at watershed scale based on rationality and another social-cultural approach to empower for local environmental governance in the context of life and livelihood for local communities , in order to reduce discommunication among different stakeholders at different organization levels.

○Progress and Results in 2017

1.     Project Progress during the FR Period to Date

a)    Synoptic research as macro-scopic approach at the watershed scale

Based on synoptic monitoring for biodiversity and nutrients in the whole catchment of Yasu River, we performed a structural equation modelling to examine how human activities, especially land uses, can affect spatial pattern of water quality and biodiversity, and then got preliminary analytical results. Analytical results of synoptic questionnaire survey on subjective well-being and environmental consciousness were fed back to upstream and coastal community workshops, in which action plans will be and were discussed to empower for forest conservation and macrophyte composting, respectively.

b)    Action research as a micro-scopic community-based approach

In the middle-stream farmer community, we experimentally demonstrated that practice of winter irrigation is effective in reduction of phosphorous loading as well as in enhancement of wetland biodiversity in rice paddies. In the coastal area, we found that lagoon ecosystems have the high rate of biological P recycling, using the δ18Op analysis. In the coastal urban communities which suffer from macrophyte overgrowth, we organized stakeholder workshops to know the potential need for macrophyte resources and discuss how to promote the use of macrophyte resources, collaborating with a core project, entitled ‘Open Team Science Project’ (PI: Yasuhisa Kondoh). Such research collaboration led to an idea to develop macrophyte portal as an internet media which may be effective in facilitation of involvement by individualized urban residents in the macrophyte resource recycling. In the middle-stream and downstream farmer communities, we held Local Cooperation Seminars to share scientific knowledge on how rehabilitation of habitat networks facilitates frog and fish spawning migration. In both areas, many participants from out-communities as well as their own communities got interested in these conservation activities.

c)     Construction of an integrated model for four gears

Compiling analytical data on synoptic researches on biodiversity, nutrients and well-being, we got a preliminary result of an integrated model to visualize relationships among four components essential to social-ecological health of watershed system, based on the structural equation modelling. After completion of this project, we expect that the model will be used as a communication supporting tool for diverse stakeholders to envision the future of watershed.

d)    Formation of watershed forum in the Silang-Santa Rosa sub-watershed

In the Silang-Santa Rosa sub-watershed, groundwater issues are relevant to stakeholders because their lives and livelihoods greatly depend on groundwater resources. While sharing our assessment results on groundwater nitrogen pollution, we held a total of nine workshops for stakeholders to identify their own specific issues related to groundwater and discuss solution strategy and action plans. A watershed forum is being developed and a Stakeholders’ Assembly was co-organized with the watershed management council. In this assembly, we took scientific and emotional approaches to visualize spatial pattern of groundwater pollution on the map and to visualize connectivity among groundwater, life and livelihood using a short movie, respectively. A questionnaire survey revealed that both approaches were effective in attracting participants’ interests in groundwater issues. This assembly generated various commitments by local governments to develop and implement watershed related policies, increased knowledge and awareness of watershed issues by participants and increased interest in collaboration in watershed governance. 

 

2.     Progress since the last reporting

a)    Synoptic research as macro-scopic approach at the watershed scale

Based on synoptic monitoring for biodiversity and nutrients in the whole catchment of Yasu River, we performed a structural equation modelling to examine how human activities, especially land uses, can affect spatial pattern of water quality and biodiversity, and then got preliminary analytical results . Analytical results of synoptic questionnaire survey on subjective well-being and environmental consciousness were fed back to upstream and coastal community workshops, in which action plans will be and were discussed to empower for forest conservation and macrophyte composting, respectively.

b)    Action research as a micro-scopic community-based approach

In the middle-stream farmer community, we experimentally demonstrated that practice of winter irrigation is effective in reduction of phosphorous loading as well as in enhancement of wetland biodiversity in rice paddies. In the coastal area, we found that lagoon ecosystems have the high rate of biological P recycling, using the δ18Op analysis. In the coastal urban communities which suffer from macrophyte overgrowth, we organized stakeholder workshops to know the potential need for macrophyte resources and discuss how to promote the use of macrophyte resources, collaborating with a core project, entitled ‘Open Team Science Project’ (PI: Yasuhisa Kondoh). Such research collaboration led to an idea to develop macrophyte portal as an internet media which may be effective in facilitation of involvement by individualized urban residents in the macrophyte resource recycling. In the middle-stream and downstream farmer communities, we held Local Cooperation Seminars to share scientific knowledge on how rehabilitation of habitat networks facilitates frog and fish spawning migration. In both areas, many participants from out-communities as well as their own communities got interested in these conservation activities.

c)     Construction of an integrated model for four gears

Compiling analytical data on synoptic researches on biodiversity, nutrients and well-being, we got a preliminary result of an integrated model to visualize relationships among four components essential to social-ecological health of watershed system, based on the structural equation modelling. After completion of this project, we expect that the model will be used as a communication supporting tool for diverse stakeholders to envision the future of watershed.

d)    Formation of watershed forum in the Silang-Santa Rosa sub-watershed

In the Silang-Santa Rosa sub-watershed, groundwater issues are relevant to stakeholders because their lives and livelihoods greatly depend on groundwater resources. While sharing our assessment results on groundwater nitrogen pollution, we held a total of nine workshops for stakeholders to identify their own specific issues related to groundwater and discuss solution strategy and action plans. A watershed forum is being developed and a Stakeholders’ Assembly was co-organized with the watershed management council. In this assembly, we took scientific and emotional approaches to visualize spatial pattern of groundwater pollution on the map and to visualize connectivity among groundwater, life and livelihood using a short movie, respectively. A questionnaire survey revealed that both approaches were effective in attracting participants’ interests in groundwater issues. This assembly generated various commitments by local governments to develop and implement watershed related policies, increased knowledge and awareness of watershed issues by participants and increased interest in collaboration in watershed governance.

○Project Members

【Leader】

OKUDA Noboru ( Research Institute for Humanity and Nature,Associate Professor,Ecological Science )

【River Research Working Group】

IWATA Tomoya ( Department of Environmental Sciences, Faculty of Life and Environmental Sciences University of Yamanashi,Associate Professor,Professor Aquatic Ecology )

ISHIKAWA Naoto ( Japan Agency for Marine-Earth Science and Technology,Postdoctoral Fellow,Stream Ecology, Limnology )

ITOH Masayuki ( Graduate School of Simulation Studies University of Hyogo,Associate Professor,Forest Hydrology )

KO Chia-Ying ( National Taiwan University,Assistant Professor,Spatial Statistics )

OHTE Nobuhito ( Graduate School of Informatics, Kyoto University,Professor,Hydrology, Ecosystem Ecology )

OKANO Junichi ( Center for Ecological Research, Kyoto University,Postdoctoral Fellow,Stream Ecology, Behavioural Ecology )

OSAKA Ken’ichi ( School of Environmental Science, The University of Shiga Prefecture,Associate Professor,Forest Hydrology )

TOGASHI Hiroyuki ( Tohoku National Fisheries Research Institute, Fisheries Research Agency,Researcher,Community Ecology )

【Lake Research Working Group】

BAN Syuhei ( School of Environmental Science, The University of Shiga Prefecture,Professor,Plankton Ecology, Limnology )

INOUE Eiso ( Lake Biwa Environmental Research Institute, Shiga Prefectural,Senior Researcher,Freshwater Biology, Aquatic Entomology )

ISHIKAWA Kanako ( Lake Biwa Environmental Research Institute, Shiga Prefecture,Researcher,Environmental Microbiology. Limnology )

JIN Guangzhe ( Guangdong Ocean Universty,Researcher,Limnology )

KAGAMI Maiko ( Yokohama National University,Professor,Limnology, aquatic biology )

KAMIYA Hiroshi ( Shimane Prefectural Institute of Public Health and Environmental Science,Division Chief,Analytical Chemistry )

KATO Toshikuni ( Shimane Prefectural Institute of Public Health and Environmental Science,Researcher,Environmental Analytical Chemistry )

KUMAGAI Michio ( Lake Biwa Sigma Research Center, Ritsumeikan University,Professor,Geophysics )

MIZUNO Katsunori ( Underwater Technology Collaborative Research Center, IIS, The University of Tokyo,Assistant Professor,Underwater acoustic )

NAKANO Shin’ichi ( Center for Ecological Research, Kyoto University,Professor,Ecological Science )

NISHIHIRO Jun ( Department of Environmental Science, Faculty of Science, Toho University,Associate Professor,Conservation Ecology )

ONODERA Shin’ichi ( Graduate School of Integrated Arts and Sciences, Hiroshima University,Professor,Hydrology )

SAITO Mitsuyo ( Graduate School of Environmental and Life Science, Okayama University,Assistant Professor,Hydrology )

SAKAI Yoichiro ( Lake Biwa Environmental Research Institute Shiga Prefecture,Researcher,Limnology )

SEIKE Yasushi ( Interdisciplinary Faculty of Science and Engineering, Shimane University,Professor,Environmental Analysis )

Tomozawa Yusuke ( Department of Environmental Science, Faculty of Science, Toho University,Doctor’s course student,Underground water chemistry )

UCHII Kimiko ( School of Medicine, Osaka Ohtani University,Assistant Professor,Microbial Ecology )

WANG Kunyang ( Graduate School of Integrated Arts and Sciences, Hiroshima University,Master’s course student,Limnology )

YI Rong ( School of Environmental Science, The University of Shiga Prefecture,Doctor’s course student,Plankton Ecology, Limnology )

【Terrestrial Research Working Group】

OSONO Takashi ( Doshisha University,Professor,Ecological Science )

HIROSE Dai ( School of Pharmacy, Nihon University,Assistant Professor,Mycology )

HOBARA Satoru ( College of Agriculture, Food and Environment Sciences, Rakuno Gakuen University,Professor,Biogeochemistry )

ISHIDA Atsushi ( Center for Ecological Research, Kyoto University,Professor,Plant Ecophysiogy )

MATSUOKA Shunsuke ( Graduate School of Simulation Studies University of Hyogo,Researcher,Ecological Science )

USHIO Masayuki ( Center for Ecological Research, Kyoto University,Rresearcher,Ecosystem Ecology, Microbial Ecology )

【Analytical Research Working Group】

TAYASU Ichiro ( Research Institute for Humanity and Nature,Professor,Ecological Science )

AMANO Yosuke ( Tohoku National Fisheries Research Institute, Fisheries Research Agency,Technical assistant,Fish Biology Ecological Science )

FUJIYOSHI Rei ( Research Institute for Humanity and Nature,Researcher,Stable Isotope Ecology )

HYODO Fujio ( Research Core for Interdisciplinary Sciences, Okayama University,Associate Professor,Forest Ecology )

IDE Jun’ichiro ( Institute of Decision Science for a Sustainable Society, Kyushu University,Assistant Professor,Forest Hydrology )

KITAZAWA Daisuke ( Institute of Industrial Science, The University of Tokyo,Associate Professor,Marine Ecosystem Engineering )

KOBAYASHI Yuki ( Graduate School of Medicine of Yamaguchi University,Lecturer,Health sciences )

KOKITA Tomoyuki ( Faculty of Marine Science and Technology, Fukui Prefectural University,Associate Professor,Ecology, Evolutionary Biology )

MARUO Masahiro ( School of Environmental Science, University of Shiga Prefecture,Professor,Analytic Chemistry )

MATSUBAE Kazuyo ( Graduate School of Engineering, Tohoku University,Professor,Industrial Ecology )

MANO Yuko ( Graduate School of Engineering, Tohoku University,Master’s course student,Industrial ecology )

MINAMOTO Toshifumi ( Graduate School of Human Development and Environment, Kobe University,Associate professor,Molecular Ecology )

OMODA Azusa ( Graduate School of Engineering, Tohoku University,Researcher,Industrial ecology )

OTAKE Tsuguo ( International Coastal Research Center, Atmosphere and Ocean Research Institute, The University of Tokyo,Professor,Fish Biology Ecological Science )

PAYTAN Adina ( IMS, University of California Santa Cruz,Professor,Biogeochemistry )

SONG Uhram ( College of Applied Life Sciences, Jeju National University,Assistant Professor,Ecological Science )

Wu Qianqian ( Graduate School of Human Development and Environment, Kobe University,Doctor’s course student,Evolutionary Ecology )

YAMANAKA Hiroki ( Department of Environmental Solution Technology, Ryukoku University,Lecturer,Fish Physiology )

【Network Research Working Group】

ASANO Satoshi ( Kyoto University Graduate School of Global Environmental Studies,Assistant Professor,Regional Planning )

ASAMI Masato ( Shiga Prefectural Government, Kotou Environmental office )

Okuda Kazuomi ( Shiga Prefectural Government,Lake Biwa Policy Division )

Fukui Haruo ( Omi Environmental Conservation Foundation )

SATO Yuichi ( Lake Biwa Environmental Research Institute,Researcher,Environmental Modelling )

KAWABATA Takahiro ( Omi Environmental Conservation Foundation,Assistant Section Chief,Environmental Policy )

KATAOKA Yoshitaka ( Fishery Experiment Station, Department of Agriculture and Fisheries, Shiga Perfecture,Assistant Section Chief,Fisheries Science )

KIKKO Takeshi ( Fisheries Management Division, Department of Agriculture and Fisheries, Shiga Perfecture,Assistant Section Chief,Fisheries Science )

OHTSUKA Taisuke ( Lake Biwa Museum,Curator,Algal biology )

KANAO Shigefumi ( Lake Biwa Museum,Curator,Fish Ecology )

【Human Research Working Group】

WAKITA Kenichi ( Faculty of Sociology and Social Welfare, Ryukoku University,Professor,Environmental Sociology )

FUKUSHIMA Shintaro ( Tokyo Woman’s Christian University.Department of Communication School of Arts and Sciences,Lecturer,Social Science )

HIRATSUKA Junichi ( NA,Former Director of Research Organizatio n of Nature and Humanity,Lake Science )

HIRAYAMA Naoko ( School of Environmental Science, The University of Shiga Prefecture,Assistant Professor,limnology Policy )

KAGOHASHI Kazuki ( Institute for Social Ethics, Nanzan University,Researcher,Environmental Economics )

KASHIO Tamaki ( Lake Biwa Museum,Researcher,Rural sociology )

KONDO Yasuhisa ( Research Institute for Humanity and Nature,Associate Professor,Archaeology, GIS )

MATSUSHITA Kyohei ( Shiga University,Associate Professor,Environmental Economics )

NAKAHARA Satoe ( Research Institute for Humanity and Nature,Researcher,cultural anthropology )

NONAMI Hiroshi ( School of Sociology, Kwansei Gakuin University,Professor,Social Psychology )

OHNO Tomohiko ( Institute of Human and Social Sciences, Kanazawa University,Associate Professor,Environmental Policy )

SAIZEN Izuru ( Kyoto University Graduate School of Global Environmental Studies,Associate Professor,Regional Planning )

SAKAGAMI Masaji ( Faculty of Health Sciences, Nihon Fukushi University,Professor,Applied Economics )

SANO Shizuyo ( Faculty of Letters, Doshisha University,Professor,Historical Geography )

TAKAHASHI Takuya ( The University of Shiga Prefecture,Professor,Forest policy and planning; corporate environmentalism )

TAKEMURA Kosuke ( Shiga University,Associate Professor,Social Psychology )

TANAKA Takuya ( Environmental Partnership Office Kinki,Creative Director,Environmental Science & Technology )

TANIGUCHI Yoshimitsu ( Department of Biological Environment, Akita Prefectural Universiy,Professor,Sociology )

UCHIDA Yukiko ( Kokoro Research Center, Kyoto University,Associate Professor,Social Psychology )

YACHI Shigeo ( Center for Ecological Research, Kyoto University,Associate Professor,Theoretical Ecology )

ZHENG Yuejun ( Faculty of Cultural and Information Science, Doshisha University,Professor,Sociometrics )

【Nutrient Management Working Group】

SANTOS-BORJA Adelina ( Office of the General Manager, Laguna Lake Development Authority,Division Chief III, International Linkages and Research Developme nt Unit,Limnology Environmental Science Integrated Lake Basin Management )

MAGBANUA Francis ( Institute of Biology, College of Science, University of the Philippines Diliman,Assistant Professor,Zoobenthos Diversity )

MENDOZA Norman ( Philippine Nuclear Research Institute,Researcher,Hydrology )

PAPA Rey Donne ( Department of Biological Sciences and Research Center for the Natural Sciences, University of Santo Tomas,Assistant Professor,Plankton Ecology, Limnology )

SEVILLA Fortunato B III ( Department of Chemistry and Research Center for the Natural and Applied Sciences, University of Santo Tomas,Professor,Instrumentation and Analytical Chemistry )

【Advisory Board】

FUJITA Noboru ( Center for Restoration of Regional Nature,Director,Plant Community Ecology )

ISHII Reiichiro ( Research Institute for Humanity and Nature,Associate Professor,Theoretical Ecology )

KAWABATA Zen’ichiro ( Research Institute for Humanity and Nature,Emeritus Professor,Aquatic Ecosystem Ecology )

NAGASAKA Akiko ( Hokkaido Research Organization Forestry Research Institute,assistant section chief,Watershed Conservation )

NAKASHIZUKA Toru ( Research Institute for Humanity and Nature,Professor,Forest ecology, biodiversity )

SAKAI Shoko ( Center for Ecological Research, Kyoto University,Associate Professor,Plant Ecology )

KOBAYASHI Kunihiko ( Research Institute for Humanity and Nature,Researcher,International Environmental law )

URABE Jotaro ( Graduate School of Life Sciences, Tohoku University,Professor,Aquatic Ecology )

【Secretariat】

IKEYA Toru ( Research Institute for Humanity and Nature,Researcher,Aquatic ecology, Environmental science )

ISHIBASHI Hiroyuki ( Research Institute for Humanity and Nature,Researcher,Area study and historical study on forested areas )

ISHIDA Takuya ( Research Institute for Humanity and Nature,Researcher,Forest Environmental Science )

LAMBINO Ria Adoracion A. ( Research Institute for Humanity and Nature,Researcher,Environmental Governance )

UEHARA Yoshitoshi ( Research Institute for Humanity and Nature,Resarch Associate,Ecology )

○Future Themes

With the reduced budget, it is not realistic to practice and compare our watershed governance across all of our study watersheds. Thus we will not conduct intensive field researches in three domestic watersheds (Hachiro Lagoon, Inba Marsh and Lake Shinji) other than Lake Biwa. Based on archives and documents, however, we will examine how governmental politics on development and environmental conservation have affected these four domestic watershed systems and how their social-ecological status have varied among these watersheds through interactions with each other, according to Advocacy Coalition Framework (ACF) as well as to Institutional Analysis and Developmental (IAD) Framework. We expect to find what is a turning point for the watershed governance to drive into the good relationship between humanity and nature through our comparison. If time and budget permit us, we may also use Social-Ecological System (SES) Framework to analyse cross-scale linkages of the natural resource governances within and between watershed systems.

Books

【Authored/Co-authored】

Okuda, N. Watanabe, K. Fukumori, S. Nakano & T. Nakazawa 2013 Biodiversity in aquatic systems and environments:Lake Biwa. Springer Japan, Chiyoda-ku,Tokyo, 91pp. ISBN 978-4-431-54150-9

【Chapters/Sections】

Minamoto, T 2016,11 Random Mutagenesis by Error-Prone Polymerase Chain Reaction Using a Heavy Water Solvent.. Andrew Reeves (ed.) Methods in Molecular Biology. In Vitro Mutagenesis Methods and Protocols,. Human Press, Tokyo, pp.491-495. ISBN: 978-1493964703

Iwata, T 2016,07 Methane cycling in wetlands and lakes.. Kimitaka Kawamura (ed.) Encyclopedia of low temperature science . Asakura Shoten, Tokyo, pp.233-234. (in Japanese) ISBN: 978-4-254-16128-1

Iwata, T. Mochizuki, N. Suzuki, T. Kohzu, A. Kojima, H. Fukui, M & Urabe,J 2016,03 Roles of terrestrial carbon subsidies to aquatic community metabolism in mountain lake ecosystems. G. Kudo (ed.) Structure and function of mountain ecosystems in Japan. Biodiversity and Vulnerability to Climate Change, Ⅶ. Springer Japan, Chiyodak-ku, tokyo. Hardcover ISBN 978-4-431-55952-8

Sano, S 2015,04 Traditional Use of Resources and Management of Littoral Environment at Lake Biwa. Bruce L. Batten & Philip C. Brown (ed.) Environment and Society in the Japanese Islands. Oregon State University Press, Oregon in USA, pp.75-95. ISBN: 9780870718014

Shibata, J., Z. Karube, Y. Sakai, T. Takeyama, I. Tayasu, Y. Satoh, S. Yachi, S. Nakano & N. Okuda 2014 Long-Term and Spatial Variation in the Diversity of Littoral Benthic Macroinvertebrate Fauna in Lake Biwa, Japan. Nakano, S., T. Yahara, T.Nakashizuka (ed.) Integrative Observations and Assessments. Ecological Research Monographs, Part III. Springer Japan, Chiyoda-ku,Tokyo, pp.151-166. DOI:10.1007/978-4-431-54783-9_8

Kawabata, Z. H. WuD. Kong, Fukushi,Y & Kubota,J(eds.) 2014 Our lakes:From the present towards a future perspective.. RIHN-Chine Study Series, 3. Shokadou, Kyoto, pp.192.

Sota, T., H. Kagata, Y. Ando, S. Utsumi, T. Osono 2013,08 Metagenomic appoach yields insights into fungal diversity and functioning.In:: Novel Patterns and Processes in Plants,Insects,and Fungi.. T.sota et al. (ed.) Species Diversity and Community Structure. Springer Briefs in Biology. Springer, Berlin, pp.1-23. DOI:10.1007/978-4-431-54261-2_1

Okuda, N. & K. Fukumori 2013 Predator diversity changes the world: from gene to ecosystem. Okuda et al. (ed.) Biodiversity in aquatic systems and environments. Lake Biwa. Springer Japan, Chiyoda-ku,Tokyo, pp.21-49. DOI:10.1007/978-4-431-54150-9_2

Papers

【Original Articles】

Wu, Q., K. Kawano, Y. Uehara, N. Okuda, M. Hongo, S. Tsuji, H. Yamanaka & T. Minamoto 2018,04 Environmental DNA reveals nonmigratory individuals of Palaemon paucidens overwintering in Lake Biwa shallow waters. Freshwater Science 37.0. DOI:10.1086/697542

Peralta, E. M., H. J. A. Guerrero, C. G. S. M. Arce, J. J. A. Domingo, M. A. Maute, M. D. S. San Miguel, E. M. C. Trino, I. B. B. De Jesus, J. C. A. Briones, F. S. Magbanua, N. Okuda, R. D. S. Papa 2018,03 Prevailing environmental conditions influence mollusk diversity and distribution around Talim Island of Laguna de Bay (Luzon Is., Philippines).. The Antoninus Journal 01:31-39.  http://theantoninus.com.ph/archives/17/

Okano, J., Okuda, N. 2018,02 Effects of resource-dependent cannibalism on population size distribution and individual life history in a case-bearing caddisfly. Plos One. DOI:10.1371/journal.pone.0191925 Open Access

Sato,T., J. Ide, M.A. Isa, F. Rahadian, T. Fujimoto, Y. Shimatani 2017,12 A challenge for sustainable electrification, respecting the local tradition in Ciptagelar village, West Java, Indonesia: Complementary approach with a private company.. Energy Procedia 141:368-372. (reviewed).  https://www.sciencedirect.com/science/article/pii/S1876610217354504

Sakata,K. M., N.Maki, H.Sugiyama, T.Minamoto 2017,12 Identifying a breeding habitat of a critically endangered fish, Acheilognathus typus, in a natural river in Japan. Science of Nature - Naturwissenschaften 104(100):11-12. DOI:10.1007/s00114-017-1521-1

Jo,T., H.Murakami, R.Masuda,K.M Sakata,S.Yamamoto,T.Minamoto 2017,11 Rapid degradation of longer DNA fragments enables the improved estimation of distribution and biomass using environmental DNA. Molecular Ecology Resources 17(6):e25-e33. DOI:10.1111/1755-0998.12685

Uchii.K., H.Doi,H.Yamanaka,T.Minamoto 2017,10 Distinct seasonal migration patterns of Japanese native and non-native genotypes of common carp estimated by environmental DNA . Ecology and Evolution 7(20):8515-8522. DOI:10.1002/ece3.3346

Kobayashi,Y., T.Iwata, 2017,10 Nitrogen and phosphorus dynamics in a large river estimated by an in situ Lagrangian tracking approach. Freshwater Biology 62(12):1997-2007. DOI:10.1111/fwb.13044.

Itoh, M., Kojima,H. P.-C. Ho, C.-W. Chang, T.-Y. Chen, S. S.-Y. Hsiao, Kobayashi,Y. Fujibayashi,M. S.-J. Kao, C.-h. Hsieh, Fukui,M. Okuda,N. Miki,T. F.-K. Shiah. 2017,09 Integrating isotopic, microbial, and modeling approaches to understand methane dynamics in a frequently disturbed deep reservoir in Taiwan. Ecological Research 32(6):861-871. DOI:10.1007/s11284-017-1502-z

Nakazawa, T., S.-Y. V. Liu, Y. Sakai, K. S. Araki, C.-H. Tsai & Okuda,N. 2017,09 Spatial genetic structure and body size divergence in endangered Gymnogobius isaza in ancient Lake Biwa. Mitochondrial DNA Part A. DOI:10.1080/24701394.2017.1357708

Luz Boyero, Manuel A.S. Graca, T.Iwata, and other 29 authors 2017,09 Riparian plant litter quality increases with latitude. Scientific Reports 7(10562). DOI:10.1038/s41598-017-10640-3

Okano, J., Tayasu, I., Nakano, S. and Okuda, N. 2017,07 Differential responses of two ecologically similar case-bearing caddisflies species to a fish chemical cue: implication for a coexistence mechanism. Zoological Science 34:461-467. DOI:10.2108/zs160207 (reviewed).

Matsubayashi,J. Saitoh,Y. Osada,Y. Uehara,Y. Haru,J. Sasaki,T. Tayasu,I. 2017,07 Incremental analysis of vertebral centra can reconstruct the stable isotope chronology of teleost fishes. British Ecological Society. DOI:10.1111/2041-210X.12834 (reviewed).

Watanabe,T., Miura, T.Iwata, H. Kojima, M.Fukui 2017,07 Dominance of Sulfuritalea species in nitrate-depleted water of a stratified freshwater lake and arsenate respiration ability within the genus. Environmental Microbiology Reports 9(5):522-527. DOI:10.1111/1758-2229.12557

Okuda, N., Y. Sakai, K. Fukumori, S.-M. Yang, C. Hsieh, F.-K. Shiah. 2017,06 Food web properties of the recently constructed, deep subtropical Fei-Tsui Reservoir in comparison with the ancient Lake Biwa. Hydrobiologia in press . DOI:10.1007/s10750-017-3258-4

Hashizumne,H., M.Sato, S.M.Otake, S.Ikeda,T.Yoonuan, S.Sanguankiat,T.Pongvongsa, K.moji,T.Minamoto 2017,05 Application of environmental DNA analysis for the detection of Opisthorchis viverrini DNA in water samples.. Acta Tropica 169:1-7. DOI:10.1016/j.actatropica.2017.01.008

Ishikawa, F.N., Chikaraishi, Y. ,Ohkouchi, N. ,Murakami,R.A. ,Tayasu, I. ,Togashi, H. , Okano, J.,Sakai, Y. , Iwata,T., Kondoh M.& Okuda,N 2017,04 Integrated trophic position decreases in more diverse communities of stream food webs. Scientific Reports(7):2130. DOI:10.1038/s41598-017-02155-8

Yamanaka,H., T.Minamoto, J.Matasuura, S.Sakurai, S.Tsuji, H.Motozawa, M.Hongo,Y.Sogo, N.Kakimi, I.Teramura, M.Sugita, M.Baba, A.Kondo 2017,04 A simple method for preserving environmental DNA in water samples at ambient temperature by addition of cationic surfactant. Limnology 18(2):233-241. DOI:10.1007/s10201-016-0508-5

Tsuji,S., M,Ushio, S.Sakurai, T. Minamoto, H.Yamanaka 2017,04 Water temperature-dependent degradation of environmental DNA and its relation to bacterial abundance . PLOS ONE 12(4). DOI:10.1371/journal.pone.0176608

Minamoto, T, K Uchii, T Takahara, T Kitayoshi, S Tsuji, H Yamanaka, H Doi 2017,03 Nuclear internal transcribed spacer-1 as a sensitive genetic marker for environmental DNA studies in common carp Cyprinus carpio. Molecular Ecology Resources 17(3):324-333. DOI:10.1111/1755-0998.12586  

Koyama, M, S Yamamoto, K Ishikawa, S Ban, T Toda 2017,03 Inhibition of anaerobic digestion by dissolved lignin derived from alkaline pre-treatment of an aquatic macrophyte. Chemical Engineering Journal 311:55-62. DOI:10.1016/j.cej.2016.11.076 (in Japanese)

Minamoto,T., M.M.Fukuda, K.R.Katsuhara, A.Fujiwara, S.Hidaka, S.Yamamto, K.Takahashi, R.Matsuda  2017,02 Environmental DNA reflects spatial and temporal jellyfish distribution. PLOS ONE 12(2). DOI:10.1371/journal.pone.0173073

Ide, J, M Ohashi, K Takahashi, Y Sugiyama, S Piirainen, P Kortelainen, N Fujitake, K Yamase, N Ohte, M Moritani., M Hara, L Finér 2017,01 Spatial variations in the molecular diversity of dissolved organic matter in water moving through a boreal forest in eastern Finland. Scientific Reports . DOI:10.1038/srep42102

Yamamoto, S, R Masuda, Y Sato, T Sado, H Araki, M Kondoh, T Minamoto, M Miya 2017,01 Environmental DNA metabarcoding reveals local fish communities in a species-rich coastal sea. Scientific Reports. DOI:10.1038/srep40368

Doi, H, K Uchii, S Matsuhashi, T Takahara, H Yamanaka, T Minamoto 2017,01 Isopropanol precipitation method for collecting fish environmental DNA. Limnology and Oceanography: Methods 15(2). DOI:10.1002/lom3.10161

Tsuji,S., H.Yamanaka, T. Minamoto 2017,01 Effects of water pH and proteinase K treatment on the yield of environmental DNA from water samples.. Limnology 18(1):1-8.  https://link.springer.com/article/10.1007/s10201-016-0483-x

Briones, J. C. A., R. D. S. Papa, G. A. Cauyan, N. Mendoza & N. Okuda. 2016,12 Fish diversity and trophic interactions in Lake Sampaloc (Luzon Is., Philippines). Tropical Ecology 57(3):567-581. (reviewed).

Yamanaka, H, T Minamoto, T Takahara, K Uchii, H Doi 2016,12 Environmental DNA analysis in field research. Japanese Journal of Ecology 66(3):601-611. DOI:10.18960/seitai.66.3_601 (in Japanese)

Takahara, T, H Yamanaka, T Minamoto, H Doi, K Uchii 2016,12 Current state of biomonitoring method using environmental DNA analysis. Japanese Journal of Ecology 66(3):583-599. DOI:10.18960/seitai.66.3_583 (in Japanese)

Dela Paz, ESP, GO De Leon, ATB Fernandez, CAF Tan, AL Manuel, JVR Villalon, CVL Zamora, RDS Papa 2016,12 Faunistic Survey of Philippine Freshwater Microcrustacean Zooplankton: New Locality Records and Updated Species Accounts. Philippine Journal of Systematic Biology 10. ISSN: 1908-6865; Online ISSN: 2508-0342  http://www.academia.edu/32495178/Faunistic_Survey_of_Philippine_Freshwater_Microcrustacean_Zooplankton_New_Locality_Records_and_Updated_Species_Accounts

Liu, X S Ban 2016,12 Effects of acclimatization on metabolic plasticity of Eodiaptomus japonicus (Copepoda: Calanoida) determined using an optical oxygen meter. J Plankton Res 39(1):111-121. DOI:10.1093/plankt/fbw084

Yamanaka, H, T Minamoto, J Matsuura, S Sakurai, S Tsui, H Motozawa, M Hongo, Y Sogo, N Kakimi, I Teramura, M Sugita, M Baba, A Kondo 2016,11 A simple method for preserving environmental DNA in water samples at ambient temperature by addition of cationic surfactant. Limnology 18(2):223-241. DOI:10.1007/s10201-016-0508-5

Kobayashi,Y. Kojima,H. Itoh,M. Okuda,N. Fukui, M. F.-K. Shiah 2016,11 Abundance of planktonic methane-oxidizing bacteria in a subtropical reservoir    . Plankton & Benthos Research 11(4):144-146. DOI:10.3800/pbr.11.144 (reviewed).

Miya, M, T Minamoto, H Yamanaka, S Oka, K Sato, S Yamamoto, T Sado, H Doi 2016,11 Use of a filter cartridge for filtration of water samples and extraction of environmental DNA. Journal of Visualized Experiments 117. DOI:10.3791/54741

Tordesillas, DT, NKP Abaya, MAS Dayo, LEB Marquez, RDS Papa, S Ban 2016,11 Effect of temperature on life history traits of the invasive calanoid copepod Arctodiaptomus dorsalis (Marsh, 1907) from Lake Taal. Philippines. Plankton Benthos Res(11):1-7. DOI:10.3800/pbr.11.105

Hobara, S, S Fukunaga-Yoshida, T Suzuki, S Matsumoto, T Matoh, N Ae (2016) 2016,10 Plant silicon uptake increases active aluminum minerals in root-zone soil: implications for plant influence on soil carbon. DOI:10.1016/j.geoderma.2016.05.024

Doi, H, R Inui, Y Akamatsu, K Kanno, H Yamanaka, T Takahara, T Minamoto 2016,10 Environmental DNA analysis for estimating the abundance and biomass of stream fish. Freshwater Biology 62(1):30-39. DOI:10.1111/fwb.12846

Briones, J. C. A., R. D. S. Papa, G. A. Cauyan, N. Mendoza & N. Okuda 2016,09 Fish diversity and trophic interactions in Lake Sampaloc (Luzon Is., Philippines). Tropical Ecology 57(3):567-581. (reviewed). ISSN 0564-3295

Ho, P.-C., N. Okuda, T. Miki, M. Itoh, F.-K. Shiah, C.-W. Chang, S. S.-Y. Hsiao, S.-J. Kao, M. Fujibayashi & C.-H. Hsieh. 2016,08 Summer profundal hypoxia determines the coupling of methanotrophic production and the pelagic food web in a subtropical reservoir. Freshwater Biology(61):1694-1706. DOI:10.1111/fwb.12809

Kobayashi, Y., H. Kojima, M. Itoh, N. Okuda, M. Fukui, F.-K. Shiah 2016,07 Abundance of planktonic methane-oxidizing bacteria in a subtropical reservoir. Plankton & Benthos Research 11(4):144-146. DOI:10.3800/pbr.11.144

Okuda, N., Y. Sakai, K. Fukumori, S.-M. Yang, C. Hsieh, F.-K. Shiah 2016,06 Food web properties of the recently constructed, deep subtropical Fei-Tsui Reservoir in comparison with the ancient Lake Biwa . Hydrobiologia in press. DOI:10.1007/s10750-017-3258-4

Ohba, S., N. Okuda & S. Kudo 2016,05 Sexual selection of male parental care in giant water bugs. Royal Society open science(3). DOI:10.1098/rsos.150720

Fujiwara, A., S. Matsuhashi, H. Doi, S. Yamamoto, T. Minamoto 2016,04 Use of environmental DNA to survey the distribution of an invasive submerged plant in ponds. Freshwater Science 35(2):000-000. DOI:10.1086/685882 (reviewed). in press

Yamanaka, H., T. Minamoto 2016,03 A novel environmental DNA approach to quantify the cryptic invasion of non-native genotypes. Molecular Ecology Resources 62:147-153. DOI:10.1016/j.ecolind.2015.11.022 (reviewed).

Uchii, K., H. Doi, T. Minamoto 2016,03 A novel environmental DNA approach to quantify the cryptic invasion of non-native genotypes. Molecular Ecology Resources 16(2):415-422. DOI:10.1111/1755-0998.12460 (reviewed).

Kawatsu, M., G. Morimoto, M. Kagami 2016,02 Seasonal changes in the water bird community in Lake Inba; influence of floating-leaved macrophytes on habitat selection. Aquatic Botany 126:32-37. DOI:10.1016/j.aquabot.2015.06.003 (reviewed).

Maruo, M., M. Ishimaru, Y. Azumi, Y. Kawasumi, O. Nagafuchi, H. Obata 2016,01 Comparison of soluble reactive phosphorous and orthophosphate concentrations in river waters. Limnology 17(1):7-12. DOI:10.1007/s10201-015-0463-6 (reviewed).

Nakamura, M., R. Masuda, K. Tsukamoto, T. Otake 2016,01 Dace and black porgy have limited temperature adaptability in non-natal osmotic environment. Progress in Oceanography 2:1-8. DOI:10.1007/s12562-015-0956-6 (reviewed).

Minamoto, T., Naka, T., Moji, K.,Maruyama, A 2016,01 Techniques for the practical collection of environmental DNA: filter selection, preservation, and extraction. Limnology 17(1):23-32. DOI:10.1007/s10201-015-0457-4 (reviewed).

Jin, G., Onodera, S., Saito, M., Maruyama, Y., Hayakawa, A., Sato, T., Ota, Y. and Aritomi, D 2016,01 Vertical distribution of sediment phosphorus in Lake Hachirogata related to effect of land reclamation on phosphorus accumulation. Environmental Technology 37(4):486-494. DOI:10.1080/09593330.2015.1117043 (reviewed).

Takayanagi H., R. Asami, T. Otake, O. Abe, T. Miyajima, H. Kitagawa, Y. Iryu 2015,12 Quantitative analysis of intraspecific variations in the carbon and oxygen isotope compositions of the modern cool-temperate brachiopod Terebratulina crossei. Geochimica et Cosmochimica Acta 170:301-320. (reviewed).

Osono,T. 2015,12 Decomposing ability of diverse litter-decomposer macrofungi in subtropical,temperate,and subalpine forests.. Journal of Forest Research 20(2):272-280. DOI:10.1007/s10310-014-0475-9 (reviewed).

Osono,T. 2015,12 Effects of litter type,origin of isolate, and temperature on decomposition of leaf litter by macrofungi.. Journal of Forest Research 20(1):77-84. DOI:10.1007/s10310-014-0462-1 (reviewed).

Kume, T., K. Tsuruta, H. Komatsu, Y. Shinohara, A. Katayama, J. Ide & K. Otsuki 2015,12 Difference in sap flux based stand transpiration between upper and lower slope positions in a Japanese cypress plantation watershed. Ecohydrology. DOI:10.1002/eco.1709 (reviewed).

Matsubae, K., E. Webeck, K. Nansai, K. Nakajima, M. Tanaka, T. Nagasaka 2015,12 Hidden phosphorus flows related with non-agriculture industrial activities: A focus on steelmaking and metal surface treatment. Resources, Conservation & Recycling 105(B):360-367. DOI:10.1016/j.resconrec.2015.10.002 (reviewed).

Nishino, H., Y. Hodoki, S. D. Thottathil, K. Ohbayashi, Y. Takao & S. Nakano 2015,09 Identification of species and genotypic compositions of Cryptomonas (Cryptophyceae) populations in the eutrophic Lake Hira, Japan, using single-cell PCR. Aquatic Ecology 49(3):263-272. DOI:10.1007/s10452-015-9520-9 (reviewed).

Miller, M.J., E. Feunteun, J.Aoyama, S. Watanabe, M. Kuroki, R.L.-Finiger, Y. Minegishi, T. Robinet, E. Réveillac, P.-A. Gagnaire, P. Berrebi. K. Tsukamoto, T. Otake 2015,09 Biodiversity and distribution of leptocephali west of the Mascarene Plateau in the southwestern Indian Ocean. Progress in Oceanography 137:84-102. DOI:10.1016/j.pocean.2015.05.026 (reviewed).

Hans-P. G., C. Wurzbacher, T. James, M. Kagami 2015,09 Discovery of dark matter fungi in aquatic ecosystems demands a reappraisal of the phylogeny and ecology of zoosporic fungi. Fungal Ecology 19:28-38. DOI:10.1016/j.funeco.2015.06.004 (reviewed).

Feunteun,E., M.J. Miller, A. Carpentier, J.Aoyama, C. Dupuy, M. Kuroki, M. Pagono, E. Reveillac, D. Sellos, S. Watanabe, K. Tsukamoto, T. Otake 2015,09 Stable isotopic composition of anguilliform leptocephali and other food web components from west of the Mascarene Plateau. Progress in Oceanography 137:69-83. DOI:10.1016/j.pocean.2015.05.024

Mukherjee, I., Y. Hodoki, S. Nakano 2015,08 Kinetoplastid flagellates overlooked by universal primers dominate in the oxygenated hypolimnion of Lake Biwa, Japan. FEMS Microbiology Ecology 91(8). DOI:10.1093/femsec/fiv083 (reviewed).

Hagiwara, Y., S. Matsuoka, S. Hobara, A.S. Mori, D. Hirose & T. Osono 2015,08 Bleaching of leaf litter and associated fungi in subboreal and subalpine forests. Canadian Journal of Microbiology 61(10):735-743. DOI:10.1139/cjm-2015-0111 (reviewed).

Tanabe, Y., Y. Okazaki, M. Yoshida, H. Matsuura, A. Kai, T. Shiratori, K. Ishida, S. Nakano, & M. M. Watanabe 2015,07 A novel alphaproteobacterial ectosymbiont promotes the growth of the hydrocarbon-rich green alga Botryococcus braunii. Scientific Reports 5(10467). DOI:10.1038/srep10467

Miya, M., Y. Sato, T. Fukunaga, T. Sado, J. Y. Poulsen, K. Sato, T. Minamoto, S. Yamamoto, H. Yamanaka, H. Araki, M. Kondoh, W. Iwasaki 2015,07 MiFish, a set of universal PCR primers for metabarcoding environmental DNA from fishes: Detection of >230 subtropical marine species. Royal Society Open Science. DOI:10.1098/rsos.150088 (reviewed).

Itoh, M., Y. Kobayashi, T.-Y. Chen, T. Tokida, M. Fukui, H. Kojima, T. Miki, I. Tayasu, F.-K. Shiah & N. Okuda 2015,07 Effect of interannual variation in winter vertical mixing on CH4 dynamics in a subtropical reservoir.. Journal of Geophysical Research: Biogeosciences 120(7):1246-1261. DOI:10.1002/2015JG002972 (reviewed).

Kakioka, R., T.Kokita, H.kumada, K.Watanabe & N.Okuda 2015,07 Genomic architectue of habitat-related divegence and signature of directional selection in the body shapes of Gnathopogon fishes.. Molecular Ecology 24(16):4159-4174. DOI:10.1111/mec.13309 (reviewed).

Koizumi, N., T. Takahara, T. Minamoto, H. Doi, A. Mori, K. Watanabe, T. Takemura 2015,06 Preliminary experiment for detection method of fish inhabiting agricultural drainage canals using environmental DNA. IDRE Journal 83(3):IV_7-IV_8. DOI:10.11408/jsidre.83.IV_7 (reviewed).

Shimizu, Y., S, Onodera, H. Takahashi, & K. Matsumori 2015,06 Impact analysis of the decline of agricultural land-use on flood risk and material flux in hilly and mountainous watersheds. Proceedings of the International Association of Hydrological Sciences 370:39-44. DOI:10.5194/piahs-370-39-2015 (reviewed).

Saito, M., S. Onodera, G. Hisaka, M. Tokumasu 2015,06 Evaluation for the effect of non-stationary nutrient transport on the coastal seaweed cultivation in western Japan. PIAHS 371:149-155. DOI:10.5194/piahs-371-149-2015 (reviewed).

Jin, G., Y. Shimizu, S. Onodera, M. Saito, K. Matsumori 2015,06 Evaluation of drought impact on groundwater recharge rate using SWAT and Hydrus models on an agricultural island in western Japan . Proceedings of the International Association of Hydrological Sciences 371:143-148. DOI:10.5194/piahs-371-143-2015 (reviewed).

Ishida, S., D. Nozaki, H.-P. Grossart, M. Kagami 2015,06 Novel basal fungal lineages from freshwater phytoplankton and lake samples. Environmental Microbiology Reports 7(3):435-441. DOI:10.1111/1758-2229.12268

Ide, J., H. Somura, T. Nakamura, Y. Mori, I. Takeda & K. Nishida 2015,06 Hydrological Effects on Relationships Between δ15N of River Nitrate and Land Use in a Rural River Basin, Western Japan. River Research and Applications 31:639-649. DOI:10.1002/rra.2756 (reviewed).

Shimizu, Y., S, Onodera, G. Jin, G. & M. Saito 2015,05 Estimation of long term nutrient loadings into a hypereutrophic artificial lake in lowland catchment, western Japan. IAHS Publication 368:337-342. DOI:10.5194/piahs-368-337-2015 (reviewed).

Chen Y. & Zheng Y. 2015,05 Cross-National Analysis on Sensitivity to Environmental Quality and Its Change in East Asia. Advances in Applied Sociology 5(6):183-194. DOI:10.4236/aasoci.2015.56018 (reviewed).

Yamasue, E., K.Matsubae & Keiichi N. Ishihara 2015,04 Weight of Land Use for Phosphorus Fertilizer Production in Japan in Terms of Total Material Requirement. Global Environmental Research 19(1):97-104. (reviewed).

Mori, A., T. Shiono, T. F. Haraguchi, A. Ota, D. Koide, T. Ohgue, R. Kitagawa, R. Maeshiro, T.T. Aung, T. Nakamori, Y. Hagiwara, S. Matsuoka, A. Ikeda, T. Hishi, S. Hobara, E. Mizumachi, A. Frisch, G. Thor, S. Fujii, T. Osono & L. Gustafsson 2015,04 Functional redundancy of multiple forest taxa along an elevational gradient: predicting the consequences of non-random species loss. Journal of Biogeography 42:1383-1396. DOI:10.1111/jbi.12514 (reviewed).

E. Webeck, K. Matsubae, K.Nakajima, K.Nansai, T.Nagasaka 2015,04 Phosphorus Flows in the Asian Region. Global Environmental Research 19(1):9-18. (reviewed).

Doi, H., T. Takahara, T. Minamoto, S. Matsuhashi, K. Uchii, H. Yamanaka 2015,04 Droplet digital Polymerase chain reaction (PCR) outperforms real-time PCR in the detection of environmental DNA from an invasive fish species. Environmental Science &Technology 49(9):5601-5608. DOI:10.1021/acs.est.5b00253 (reviewed).

Zheng Y. 2015,03 Statistical Verification of Reliability and Validity of Opinion Poll in Japan. Yoron 115:46-50.

Katsumata, S., S. Hobara S, T. Osono & H. Takeda 2015,03 Mass, nitrogen content, and decomposition of woody debris in forest stands affected by excreta deposited in nesting colonies of Great Cormorant. Ecological Research 30(4):555-561. DOI:10.1007/s11284-015-1256-4 (reviewed).

Hishinuma, T., T. Osono, Y. Fukasawa, J.I. Azuma, & H. Takeda 2015,03 Application of 13C NMR spectroscopy to characterize organic chemical components of decomposing coarse woody debris from different climatic regions. Annals of Forest Research 58(1):3-13. DOI:10.15287/afr.2015.356 (reviewed).

Doi, H., K. Uchii, T. Takahara, S. Matsuhashi, H. Yamanaka, T. Minamoto 2015,03 Use of droplet digital PCR for estimation of fish abundance and biomass in environmental DNA surveys. PLOS ONE 10(3). DOI:10.1371/journal.pone.0122763 (reviewed).

Kobayashi,Y., Y. Hodoki, K. Ohbayashi, N. Okuda & S. Nakano 2015,03 Change in bacterial community structure associated with phytoplankton succession in outdoor experimental ponds. Plankton and Benthos Research 10(1):34-44. DOI:10.3800/pbr.10.34 (reviewed).

Osono,T. 2015,02 Hyphal length in the forest floor and soil of subtropical,temperate,and subalpine forests.. Journal of Forest Reserch 20(1):69-76. DOI:10.1007/s10310-014-0461-2 (reviewed).

Osono,T. 2015,02 Diversity,resource utiliation, and phenology of fruiting bodies of litter-decomposing macrofungi.. Journal of Forest Research 20(1):60-68. DOI:10.1007/s10310-014-0459-9 (reviewed).

Ishii, N., S. Ishida, M. Kagami 2015,02 PCR primers for assessing community structure of aquatic fungi including Chytridiomycota and Cryptomycota. Fungal Ecology 13:33-43. DOI:10.1016/j.funeco.2014.08.004 (reviewed).

Fukumoto, S., A. Ushimaru T. Minamoto 2015,02 A basin-scale application of environmental DNA assessment for rare endemic species and closely related exotic species in rivers: a case study of giant salamanders in Japan. Journal of Applied Ecology 52(2):358-365. DOI:10.1111/1365-2664.12392 (reviewed).

Somura, H., T. Masunaga, Y. Mori, I. Takeda, J. Ide & H. Sato 2015,01 Estimation of nutrient input by a migratory bird, Tundra Swan (Cygnus columbianus), to winter-flooded paddy fields. Agriculture, Ecosystems & Environment 199:1-9. DOI:10.1016/j.agee.2014.07.018 (reviewed).

Minamoto, T., X. Pu, J. Xie, Y. Dong, D. Wu, H. Kong, X. Yang, T. Takahara, M. N. Honjo, H. Yamanaka, Z. Kawabata 2015,01 Monitoring of fish pathogenic viruses in natural lakes in Yunnan, China. Limnology 16(1):69-77. (reviewed).

Matsubae, K., E. Yamasue, T. Inazumi, E. Webeck, T. Miki, T. Nagasaka 2015,01 Innovations in Steelmaking Technology and Hidden Phosphorus Flows. Science of the Total Environment 542(B):1162-1168. DOI:10.1016/j.scitotenv.2015.09.107 (reviewed).

Takasu, H., M. Ushio, J. E. LeClair, & S. Nakano 2015 High contribution of Synechococcus to phytoplankton biomass in the aphotic hypolimnion in a deep freshwater lake (Lake Biwa, Japan). Aquat. Microb. Aquatic Microbial Ecology 75(1):69-79. DOI:10.3354/ame01749 (reviewed).

Takahara, T., T. Minamoto, H. Doi 2015 Effects of sample processing on the detection rate of environmental DNA from the Common Carp (Cyprinus carpio). Biological Conservation 183:64-69. DOI:10.1016/j.biocon.2014.11.014 (reviewed).

Osono,T.,J.I. Azuma & D. Hirose 2014,12 Plant species effect on the decomposition and chemical changes of leaf litter in grassland and pine and oak forest soils.. Plant and Soil 376:411-421. DOI:10.1007/s11104-013-1993-5 (reviewed).

Garcia, V. O. S., R. D. S. Papa, J. C. A. Briones, N. Mendoza, N. Okuda and A. C. Diesmos 2014,12 Food habits and distribution of the Lake Taal sea snake (Hydrophis semperi Garman, 1881) and the sympatric little file snake (Acrochordus granulatus Schneider, 1799) in Lake Taal Philippines. Asian Herpetological Research 5(4):255-262. DOI:10.3724/SP.J.1245.2014.00255 (reviewed).

Tateno,O.,T.Osono & H. Takeda 2014,08 Beech cupules share endophytic fungi with leaves and twigs.. Mycoscience 56(3):252-256. DOI:10.1016/j.myc.2014.07.005 (reviewed).

Ishikawa, N. F., Y. Kato, H. Togashi, M. Yoshimura, C. Yoshimizu, N. Okuda & I. Tayasu 2014,07 Stable nitrogen isotopic composition of amino acids reveals food web structure in stream ecosystems. Oecologia 175(3):911-922. DOI:10.1007/s00442-014-2936-4 (reviewed).

Nishihiro, J., Y.Kato, T.Yoshida & I. Washitani 2014,07 Heterogeneous distribution of a floating-Leaved plant、Trapa japonica, in Lake Mikata, Japan, is determined by limitations on seed dispersal and harmful salinity levels.. Ecological Research 29:981-989. DOI:10.1007/s11284-014-1186-6 (reviewed).

Kojima, H., R. Tokizawa, K. Kogure, Y. Kobayashi, M. Itoh, N. Okuda, F.-K. Shiah & M. Fukui 2014,07 Community structure of planktonic methane-oxidizing bacteria in a subtropical reservoir characterized by dominance of phylotype closely related to nitrite reducer. Scientific Reports 4:5728. (reviewed).

Shirouzu, T., T.Osono & D. Hirose 2014,06 Resource utilization of wood decomposers: mycelium unclear phases and host tree species affect wood decomposition by Dacrymycetes.. Fungal Ecology 9:11-16. (reviewed).

Osono, T., S. Matsuoka,D. Hirose, M. Uchida & H. Kanda 2014,06 Fungal colonization and decomposition of leaves and stems of Salix arctica on deglaciated moraines in high-Arctic Canada.. Polar Science 8:207-216. (reviewed).

Kagami, M., T. Miki, G.Takimoto 2014,05 Mycoloop: chytrids in aquatic food webs. Frontiers in Microbiology 5(166). DOI:10.3389/fmicb.2014.00166 (reviewed).

Ishikawa, N.F.,M. Uchida, Y. Shibata & I. Tayasu 2014,05 Carbon storage reservoirs in watersheds support stream food webs via periphyton production. Ecology 95(1264):1271. DOI:10.1890/13-0976.1 (reviewed).

Ikeda, A.,S. Matsuoka,H. Masuya, A.S. Mori,D.Hirose & T. Osono 2014,04 Comparison of the diversity,compasition,and host recurrence of xylariaceous endophytes in subtropical, cool temperate, and subboreal regions in Japan. Population Ecology 56(2):289-300. DOI:10.1007/s10144-013-0412-3 (reviewed).

Hobara, S.,T. Osono,D. Hirose,K. Noro,M. Hirota & R. Benner 2014,04 The roles of microorganisms in litter decomposition and soil formation.. Biogeochemistry 118(471):486. (reviewed).

Hamaoka, H., A. Kaneda, N. Okuda & K. Omori 2014,03 Upwelling-like bottom intrusion enhances the pelagic-benthic coupling by a fish predator in a coastal food web. Aquatic Ecology 48(1):63-71. DOI:10.1007/s10452-013-9466-8 (reviewed).

Fukasawa,Y.,S.Katsumata, A.S. Mori, T. Osono & H. Takeda. 2014,01 Accumulation and decay dynamics of coarse woody debris in an old-growth subalpine coniferous forest in Japan.. Ecological Research 29:257-269. (reviewed).

【Review Articles】

Ohtsuka, T 2015,02 Nursery grounds for round crucian carp, /Carassius auratus grandoculis/, in rice paddies around Lake Biwa. Nishikawa, U. & Miyashita (ed.) Social-ecological restoration in paddy-dominated landscapes. Ecological Research Monographs. Springer, Berlin Heidelberg, pp.139-164. DOI:10.1007/978-4-431-55330-4

Research Presentations

【Oral Presentation】

Uehara, Y., H. Takayama, Y. Kataoka, T. Kikkou, M. Nemoto, T. Kokita, T. Otake & N Okuda Remarkable homing ability of a pelagic crucian carp “Carassius auratus grandoculis. 6th International Otolith Symposium, 2018.04.15-2018.04.20, Keelung, Taiwan.

Peralta, E. M., C. B. Bacinillo, J. C. A. Balani, S. E. Basmala, E. J. S. S. Calalin, M. A. G. Calleja, J. B. C. Go, M. T. S. Gosiengfiao, F. A. T. Valdecañas, J. N. Gregorio, N. Mendoza, T. Ishida, F. S. Magbanua, J. C. A. Briones, R. D. S. Papa & N. Okuda ”Interactions between humanity and carps in view of alienologyLittoral food web analysis: Stable isotopes reveal anthropogenic impacts on Oreochromis niloticus and its food sources in Laguna de Bay”. The 8th Fisheries Science Conference, 2018.09.05-2018.09.06, Pasay City, Philippines.

Yi, R., P. Song, M. Maruo, S. Ban, T. Ishida & N. Okuda What is difference between orthophosphate and SRP in lake waters?. The Japanese Society of Limnology 82th Annual Meeting, 2017.09.29, Senboku.Akita.

Asano,S. Wakita,K. Okuda,N. Tokito,M. Saizen,I Bio-indicators to Estimate a State of​ ​ Socio-ecological System. Special Seminar at Hue University of Agriculture and Forestry, 2017.09.08, Vietnam.

Teramura, K., M, Allen. J, Hargrove. J. D, Austin. S,Walsh. W, Porack. N, Trippel.Takata,K. Okuda,N. Yodo,T & Kitagawa,T. “Construction of Genetic Linkage Maps of the Largemouth Bass”. American Fisheries Society 147th Annual Meeting, 2017.08.20-2017.08.24, Tampa Convention Center, Florida.

Cabanillas-Terán, N., P. L. Andrade, J. Marin & Okuda,N. “Trophic niche partioning of Diadema mexicanum and Eucidaris thouarsii in rocky reef bottoms of Ecuador” . IX Congreso Mexicano de Arrecifes Coralinos, 2017.06.13-2017.06.16, Quintana Roo.Mexico.

Peralta, E. M., J. C. A. Briones, N. Okuda, F. S. Magbanua & R. D. S. Papa “Taxonomic Sufficiency: Implications from ecological studies on aquatic insects in Philippine watersheds” . 35th Association of Systematic Biologists of the Philippines-Symposium and Annual Meeting, 2017.05.28-2017.05.31, Bacolod City, Philippines.

Peralta, E. M., L. Batucan, Uehara,Y. Ishida,T. Kobayashi,Y. C.-Y. Ko, Iwata,T. A, Borja. J. C. Briones. R. D. Papa. Magbanua,F. & Okuda,N. “Benthic macroinvertebrates response to water quality and canopy cover of a heavily impacted tropical subwatershed”. In: Biodiversity, nutrients and other materials in ecosystems from headwaters to coasts JpGU-AGU Joint Meeting 2017 , 2017.05.20, Chiba, Makuhari Messe.

Ko, C.-Y. Iwata, T. J.-Y. Lee, Murakami,A. Okano, J. Ishikawa,F. Sakai,Y. Tayasu,I. Itoh,M. U. Song, Togashi,H. Nakano, S. Ohte ,N. & Okuda,N. “Alpha and beta diversity of benthic macroinvertebrates in natural and disturbed river watersheds and their environmental driver”. In: Biodiversity, nutrients and other materials in ecosystems from headwaters to coasts JpGU-AGU Joint Meeting 2017 , 2017.05.20, Chiba, Makuhari Messe.

Onodera, S., Saito,M. Ban, S. Jin,G. Tomozawa,Y. & Okuda,N. "Spatial Variation in Lacustrine Groundwater Discharge (LGD) as a Nutrient Source in Lake Biwa, Japan”. In: Biodiversity, nutrients and other materials in ecosystems from headwaters to coasts JpGU-AGU Joint Meeting 2017 , 2017.05.20, Chiba, Makuhari Messe.

Trino, E. M. C., I. B. B. De Jesus, E. M. Peralta, H. Guerrero, A. Santos-Borja, F. Magbanua, J. C. Briones, R. D. Papa & Okuda,N. “Biodiversity Assessment of Littoral Macrozoobenthos in Laguna de Bay, Philippines”. In: Biodiversity, nutrients and other materials in ecosystems from headwaters to coasts JpGU-AGU Joint Meeting 2017, 2017.05.20, Chiba, Makuhari Messe.

Fujinaga, S., Kobayashi,Y. Murakami, A. R. Ushio,M. Song,U. Tayasu,I. Ishikawa,N. F. Okano,J. C.-Y. Ko, Togashi,H. Sakai,Y. Itoh,M. Ohte,N. Nakano,S. Iwata,T. & Okuda,N. "Bacterial community composition and richness in biofilms of the Yasu and Ado Rivers”. In: Biodiversity, nutrients and other materials in ecosystems from headwaters to coasts JpGU-AGU Joint Meeting 2017 , 2017.05.20, Chiba, Makuhari Messe.

Ide, J., A. P. Cid-Andres, Ishida,T. Osaka, K. Iwata,T. Hayashi,T. Akashi,M. Tayasu,I & Okuda,N. “Comparisons of oxygen isotope ratio of phosphate in river water and rocks between two watersheds in central Japan”. In: Biodiversity, nutrients and other materials in ecosystems from headwaters to coasts JpGU-AGU Joint Meeting 2017 , 2017.05.20, Chiba, Makuhari Messe.

Ishida, T., Uehara,Y. Iwata,T. Privaldos,O. Asano,S. Ikeya,T. Osaka,K. Ide, J. Tayasu,I & Okuda,N. “Biogeochemical cycling of phosphate in the Yasu River Watershed: Insight from oxygen isotope of phosphate”. In: Biodiversity, nutrients and other materials in ecosystems from headwaters to coasts JpGU-AGU Joint Meeting 2017 , 2017.05.20, Chiba, Makuhari Messe.

De Jesus, I. B. B., J. C. A. Briones, O. L. A. Privaldos, E. M. Peralta, Uehara,Y. Ishida,T. A. S. Borja, F. S. Magbanua, R. D. S. Papa. Iwata,T. & Okuda,N. “Quantification of phosphorus and nitrogen uptake in a tropical freshwater ecosystem in Southeast Asia suggests N limitation”. In: Biodiversity, nutrients and other materials in ecosystems from headwaters to coasts JpGU-AGU Joint Meeting 2017 , 2017.05.20, Chiba, Makuhari Messe.

Iwata. T., Hayashi,T. Akashi, M. Murakami,A. R. & Okuda,N. “Nitrogen and phosphorus dynamics in two Japanese river networks with contrasting watershed land use". In: Biodiversity, nutrients and other materials in ecosystems from headwaters to coasts JpGU-AGU Joint Meeting 2017, 2017.05.20, Chiba, Makuhari Messe.

Jin, G. Saito,M. Onodera,S. Ishida,T. Okuda,N. Yi,R. Ban,S & Tomozawa,Y. "Characteristic of oxygen isotope ratio of phosphate in endmember of Lake Biwa". ”In: Biodiversity, nutrients and other materials in ecosystems from headwaters to coasts JpGU-AGU Joint Meeting 2017 , 2017.05.20, Chiba, Makuhari Messe.

Okuda, N. “Toward synthesis of watershed sciences”. In: Biodiversity, nutrients and other materials in ecosystems from headwaters to coasts JpGU-AGU Joint Meeting 2017, 2017.05.20, Chiba, Makuhari Messe.

Osaka, K., Chishiro,S. Iwata,T & Okuda,N. “The quantitative evaluation of bio-available particulate phosphorus discharged from Yasu River”. In: Biodiversity, nutrients and other materials in ecosystems from headwaters to coasts JpGU-AGU Joint Meeting 2017 , 2017.02.20, Chiba, Makuhari Messe.

Triño, E. M. C., I. B. B De Jesus, E. M. Peralta, H. J. A. Guerrero, C. G. S. M. Arce, J. J. A. Domingo, M. A. Maute, M. D. S. San Miguel, J. C. A. Briones, F. S. Magbanua, A. C. Santos-Borja, R. D. S. Papa & N. Okuda Biodiversity Assessment of Littoral Macrozoobenthos in Laguna de Bay, Philippines. The 16th World Lake Conference, 2016.11.07-2016.11.11, Bali.

Okuda, N. Toward the adaptive watershed governance to enhance biodiversity-driven nutrient cycling and human well-being. The 16th World Lake Conference, 2016.11.07-2016.11.11, Bali.

Khatun, S, H Kojima, T Iwata A novel aerobic methane production pathway in freshwater ecosystems. The 81st Annual Meeting of the Japanese Society of Limnology, 2016.11.03-2016.11.06, Ryukyu University.

Asano S., K. Wakita, I. Saizen & N. Okuda Can the spawn of the Japanese brown frog (Rana japonica, Ranidae) be a local environmental index to evaluate environmentally friendly rice paddies?. , 2016.10.17-2016.10.21, Colombo.

Peralta, E., Batucan L. S. Jr., Briones, J. C. A, F. S. Magbanua, R. D. S. Papa, Magbanua F. S. & N. Okuda Benthic macroinvertebrates assemblages and biological metrics in relation to land cover and environmental factors in Silang-Santa Rosa subwatershed, Philippines. 48th Annual National Convention of the Federation of Institutions for Marine and Freshwater Sciences, 2016.09.21-2016.09.23, University of Eastern Philippines, Catarman. .

De Jesus, I. B., O. L. A. Privaldos, A. S. Borja, F. S. Magbanua, R. D. S. Papa, T. Iwata & N. Okuda A pioneer in tropical streams: determination of phosphorous and nitrogen uptake in Silang-Santa Rosa watershed, Philippines. 48th Annual National Convention of the Federation of Institutions for Marine and Freshwater Sciences, 2016.09.21-2016.09.23, University of Eastern Philippines, Catarman.

Okuda, N., Y. Sakai, J. Shibata, Z. Karube, Y. Kato, T. Komiya, Y. Okuzaki, M. Hori, I. Tayasu, S. Yachi, S. Nakano & T. Nagata Spatio-temporal dynamics of food webs in the ancient Lake Biwa: Causes and consequences of changing biodiversity. The 33rd Congress of the International Society of Limnology, 2016.07.31-2016.08.05, Trino, Italy.

Hernandez, MBM, KCV Buenafe, JGJ Antonio, JEC Balagtas, JL Gan, ITG Santos, NCA Tamayo, JSH Villa-Abrille, JPM Vilvestre, S Letana, FS Magbanua 1st Philippine Symposium on Freshwater Biodiversity and Ecosystems, Manila, Philippines. , 2016.06.07-2016.06.10, University of Santo Tomas,Philippine.

Deborde, DDD, MBM Hernandez, FS Magbanua Benthic macroinvertebrate community as indicator of stream health: how land use affects stream benthic macroinvertebrates. 1st Philippine Symposium on Freshwater Biodiversity and Ecosystems, 2016.06.07-2016.06.09, University of Santo Tomas, Manila, Philippines.  

De Jesus, IBB, JCB Briones, A Borja, F Magbanua, RDS Papa, T Iwata, N Okuda Application of tracer additions for spiraling curve characterization in Silang-Santa Rosa Subwatershed, Philippines. 1st Philippine Symposium on Freshwater Biodiversity and Ecosystems, 2016.06.07-2016.06.09, University of Santo Tomas, Manila, Philippines.

Encina, L, TCG Bermejo, RM Madrelejos, KML Viray, EM Triño, IBB De Jesus, HJ Guerrero, EM Peralta, JC Briones, RDS Papa Spatial variability of the trophic structure of littoral zones in Laguna de Bay in association with water physicochemical parameters and nutrient levels. 1st Philippine Symposium on Freshwater Biodiversity and Ecosystems, 2016.06.07-2016.06.09, University of Santo Tomas, Manila, Philippines.

Magbanua, FS, KA Ortizo Benthic macroinvertebrate communities and water physico-chemistry along two major rivers of Maasim, Sarangani. 1st Philippine Symposium on Freshwater Biodiversity and Ecosystems, 06,07-2016,06,10, University of Santo Tomas, Philippines. , 2016.06.07-2016.06.10, University of Santo Tomas, Manila, Philippines.

Magbanua, FS, LS Batucan Jr. PQ Palomares, ARR Flandez, MBM Hernandez Stream macroinvertebrate community responses to contrasting land use and reduced discharge 1st Philippine Symposium on Freshwater Biodiversity and Ecosystems,. , 2016.06.07-2016.06.10, University of Santo Tomas, Manila, Philippines.

Okuda, N. Methanotrophic food webs as a carbon recycling system in lakes under climate changes (Invited talk) . The 1st Philippine Symposium on Freshwater Biodiversity and Ecosystems, 2016.06.07-2016.06.10, University of Santo Tomas, Manila,.

Kudo, S., N. Okuda, S. Ohba Male egg-caring is sexually selected in giant water bugs.. ISBE2016 Conference, 28th, 2016.06.03, University of Exeter.

Chishiro, S., K. Osaka, K. Fujita O. Nagafuchi & N. Okuda Evaluation of the source and bioavailability of particulate phosphorus in Yasu River by using sequential extraction methods. JpGU Meeting 2016, 2016.05.22-2016.05.26, Makuhari Messe Chiba City.

Saitoh, Y., T. Nakano, K.-C. Shin, K. Yamashita, H. Amakawa, C. Yoshimizu, J. Matsubayashi, Y. Kato, H. Togashi, Y. Amano, Y. Kurita, N. Okuda & I. Tayasu Spatial variation of neodymium and strontium isotope ratios of shellfish soft bodies in the coastal sea of eastern Tohoku District. JpGU Meeting 2016, 2016.05.22-3016.05.26, Makuhari Messe.

Arce, CG, JJ Domingo, MA Maute, MS San Miguel, EM Triño, IBB De Jesus, HJ Guerrero, EM Peralta, JC Briones, RDS Papa Taxonomy and diversity of littoral macrozoobenthos in Talim Is., Laguna de Bay. Association of Systematics Biologists of the Philippines Annual Convention. Philippine Systematics Beyond Borders, 2016.05.19-2016.05.20, University of Santo Tomas, Manila, Philippines.

Ide, J, M Ohashi, K Köster, F Berninger, I Miura, N Makita, K Yamase, J Pumpanen Changes in the quality of dissolved organic matter in soil water with time since last fire in a boreal forest. EGU General Assembly , April 2016, Vienna, Austria.

Ide, J., H. Somura, T. Nakamura, Y. Mori, I. Takeda & K. Nishida Spatial variations in river nitrate concentration from upper toward lower reaches in the hilly and mountainous area. The 127th Annual Meeting of the Japanese Forest Society, 2016.03.27-2016.03.30, Kanagawa, Japan.

Kagami, M, D Nozaki, T Nakamura, W Hirano. Hidden diversity and host specificity of parasitic fungi infecting phytoplankton in Lake Inba. The 63th Annual Meeting of Ecological Society of Japan, 2016.03.24, Sendai. (in Japanese)

Khatun, S, T Iwata, H Kojima. Aerobic methane production by planktonic microbes under phosphorus-starved condition in lakes. The 63rd Annual Meeting of the Ecological Society of Japan, 2016.03.20-2016.03.24, Sendai International Center, Sendai. (in Japanese)

Arquilla, MLY, EKG Bumanlag, HMD Peñaranda, GA Cauyan, JCA Briones Acanthocephalan parasites in the gut of Oreochromis niloticus in the Seven Lakes of San Pablo City. 8th Scientific Meeting of the Philippine Society of Parasitology, 年0月日,, 2016.03.12, Midas Hotel, Pasay City.

Gabaton, NMA, HGA Steiro, RMB Timbang, JB Visco, GA Cauyan, JCA Briones A rapid assessment of the endo-parasite biodiversity of littoral fishes from the Seven Lakes of San Pablo City, Philippines. 8th Scientific Meeting of the Philippine Society of Parasitology, 2016.03.12, Midas Hotel, Pasay City..

Ace, CG, JJ Domingo, MA Maute, MS San Miguel, EM Triño, IBB De Jesus, HJ Guerrero, EM Peralta, JC Briones, RDS Papa A Taxonomy and diversity of littoral macrozoobenthos in Talim Is., Laguna de Bay. Science Week. Theme: Open Science and Inclusive Innovation for Resilience Building, 2016.02.29, College of Science,.

Magbanua, FS, AM Fontanilla, PS Ong, MBM Hernandez 25 years of Philippine freshwater research: what has been done and what to do next?. its impact on Philippine Freshwater biota, . , 2016.02.18.

Magbanua, FS Agricultural intensification and stream health: combined impacts of pesticide and sediment. UP Biology 30th Anniversary, 2016.01.29, Institute of Biology, University of the Philippines Diliman, Quezon City, Philippines .

Kawakami, T., Y. Shimizu, G. Ogawa, T. Saito, M. Iida, N. Sugihara, S. Sato , Ueda H., Otake T Otolith stable isotope and trace element analyses to reconstruct migration history of chum salmon Oncorhynchus kata. Symposium on growth-survival paradigm in early life stages of fish: controversy,synthesis, and multidisciplinary approach, 2015.11.09-2015.11.11, 神奈川県横浜市.  http://cse.fra.affrc.go.jp/takasuka/gsp/

Osono T., Matsuoka S., Hiradate S., Hobara S., Hirose D Fungi associated with the bleaching of leaf litter in a subtropical forest. Asian Mycological Congress 2015, 2015.10.07-2015.10.10, Goa University, Goa, India.

Osono, T., S. Matsuoka, Y. Nagao, T. Itioka Domatium-inhabiting fungi of eight myrmecophytic Macaranga species. Frontier in Tropical Forest Research: Progress in Joint Projects between the Forest Department Sarawak and the Japan Research Consortium for Tropical Forests in Sarawak, 2015.09.21-2015.09.22, Kuching, Malaysia.

Ide, J., H. Somura, T. Nakamura, Y. Mori, I. Takeda & K. Nishida Spatial variations in concentration and nitrogen and oxygen stable isotopes of river nitrate in a hilly and mountainous area, western Japan. The 4th International Conference on Forests and Water in a Changing Environment, 2015.07.06-2015.07.09, Kelowna, BC, Canada.

Cid, A.P.,Song,U., Tayasu,I. , Okano,J. , Togashi,H., Ishikawa, N.,Murakami, A. ,Hayashi, T. ,Iwata , T. ,Osaka, K. Nakano ,S. and Okuda,N. Spatial distributions of REE, heavy metals and oxygen isotope of phosphate in the Yasu river, Shiga, Japan. JpGU Meeting 2015, 2015.05.24-2015.05.28, Makuhari Messe.  https://confit.atlas.jp/guide/event-img/jpgu2015/03962/public/pdf?type=in

Itoh, M., Y. Kobayashi, T.-Y. Chen, T. Tokida, M. Fukui, H. Kojima, T. Miki, I. Tayasu, F.-K. Shiah & N. Okuda. CH4 dynamics in a subtropical reservoir under changes climate. The 62nd ESJ Annual Meeting, 2015.03.18-2015.03.22, Kagoshima.  http://www.esj.ne.jp/meeting/abst/62/S10-2.html

Ho, P.-C., N. Okuda, M. Itoh, T. Miki, F.-K. Shiah, C.-W. Chang & C.-H. Hsieh Summer hypoxia determines the coupling of methanotrophic and pelagic foodweb. The 62nd ESJ Annual Meeting, 2015.03.18-2015.03.22, Kagoshima.  http://www.esj.ne.jp/meeting/abst/62/S10-5.html

Okuda, N. What's the methanotrophic food web?. The 62nd ESJ Annual Meeting, 2015.03.18-2015.03.22, Kagoshima. (in Japanese)  http://www.esj.ne.jp/meeting/abst/62/S10-1.html

Sakai, Y. Application of stable isotopes in aquatic ecology and environment. The 16th international symposium on river and lake environments., 2014.08.24-2014.08.27, Chuncheon Korea.

Tayasu, I. Use of carbon-14 in terrestrial food webs. Radiocarbon Conference, 2014.08.22, Belfast.

Ishikawa, N.F., M. Yamane, Y. Miyairi, Y. Yokoyama, I. Tayasu & N. Ohkouchi Use of radiocarbon natural abundances and compound-specific isotope analyses for stream food web reserch. Radiocarbon Conference, 2014.08.21, Belfast.

Yachi, S., D. Kitazawa, S. Nakano, Y. Sakai and N. Okuda Toward the evaluation of extinction risk of Lake Biwa benthic species due to global warming. JSMB/SMB 2014, 2014.07.28-2014.08.01, Osaka city.

Okuda, N., I. Tayasu, S. Nakano, M. Ito, M. Fukui, H. Kojima, K. Kogure, M. Fujibayashi, C. Maruo, P.-C. Ho, C.-W. Chang, L. Zhang, W.-H. Teng, T. Miki, C.-H. Hsieh, Y. Kobayashi, C.-C. Chang and F.-K. Shiah Methanotrophic food webs as a carbon recycling system in lakes under climate changes. The 6th EAFES International Congress, 2014.04.09-2014.04.11, Haikou, China.

【Poster Presentation】

Uehara,Y., Y,Kataoka,T.Kikko, T.Ishida, S.Asano, Y.Kobayashi, T.Ohtake, N.Okuda, Migration routes of pelagic crucian carp "Carassiusauratus grandoculis" endemic to Lake Biwa reve. JpGU-AGU Joint Meeting 2017, 2017.05.20, Chiba Makuhari Messe..

Kondo,Y., K.Hayashi, U.Ikeuchi, M.Kuribayashi, S.Yano, A.Kitamoto, Future of open science with society: Report on a multi-stakeholder workshop in Japan. JpGU-AGU Joint Meeting 2017 , 2017.05.20-2017.05.25, Chiba Makuhari Messe..  https://confit.atlas.jp/guide/event/jpguagu2017/subject/MGI27-P11/mysessions

Ikeya,T. C,-Y, Ko. E, M, Peralta. Ishida,T. Uehara,Y. Asano,S. Okuda,N. Ushio,M. Fujinaga,S. Tayasu,I. Iwata,T. The community composition and diversity of epilithicbacterium and microalgae in a Japanese river systemduring irrigation season. JpGU-AGU Joint Meeting 2017, 2017.05.20, Chiba Makuhari Messe.

Jin, G. Saito,M. Onodera,S. Ishida,T. Okuda,N. Yi,R. Ban,S. & Tomozawa,Y. “Characteristic of oxygen isotope ratio of phosphate in endmember of Lake Biwa”. In: Biodiversity, nutrients and other materials in ecosystems from headwaters to coasts. JpGU-AGU Joint Meeting 2017, 2017.05.20, Chiba Makuhari Messe.

Espiritu, K. G. R., J. N. A. De Vera, F. G. G. Cantre, E. M. Peralta, I, B, B. De Jesus. P, Palomares. J. C, Briones.Ikeya,T. ,Magbanua, F. R, D, Papa. Okuda, N. Land use impact on benthic macroinvertebrate assemblages in selected lotic ecosystems in a government-declared protected landscape. JpGU-AGU Joint Meeting 2017, 2017.05.20, Makuhari messe.

Tan, A. K. V., A. E. Belen, C. Perez, G. R. Buenaventura, E. M.Peralta, I.B. B. De Jesus, P. Palomares, J. C. Briones, Ikeya,T. ,Magbanua, F. ,R. D. Papa, Okuda N Stream Benthic Macroinvertebrates Response to Water Quality of Urban and Rural Areas of the Marikina Watershed. JpGU-AGU Joint Meeting 2017, 2017.05.20-2017.05.24, Makuhari Messe.

Asano,S. Uehara,Y. Nakashima,H. Tokito,M. Saizen,I. Privaldos Osbert, Osaka,K. Okuda,N Spatial Pattern of Ground Water Utilization in Silang-Santa Rosa Sub-watershed. JpGU-AGU Joint Meeting 2017, 2017.05.20.

Maruo, M., M. Ishimaru, Y. Azumi, K. Ohyama, H. Obata Determination of trace orthophosphate in water of Lake Biwa (Japan) by ion chromatography. Goldschmidt 2015, 2015.08.16-2015.08.21, Prague, Chezk Republic.  http://goldschmidt.info/2015/abstracts/abstractView?abstractId=3862

Osono, T., A. S. Mori, M, Uchida , H. Kanda Accumulation of carbon and nitrogen in vegetation and soils of deglaciated area and mudboils in Ellesmere Island, high-Arctic Canada.. Fourth International Symposium on the Arctic Research (ISAR-4), 2015.04.27-2015.04.30, Toyama International Conference Center, Toyama, Japan .

Sakai, Y., Karube, Z.,Shibata, J. ,Takeyama,T. , Tayasu, I.,Yachi,S. ,Nakano,S., and Okuda, N. , The impact of land uses on benthic macroinvertebrate diversity in the coastal ecosystem of Lake Biwa. 2015 ASLO Aquatic Science Meeting, 2015.02.22-2015.02.27, Granada,Spain.  http://www.sgmeet.com/aslo/granada2015/viewabstract.asp?AbstractID=27736

Osono, T., D. Hirose, S. Matsuoka, Y. Tanabe, M. Uchida & S. Kudou Role of environmental selections and dispersal in the composition of fungal communities in continental Antarctica.. The 36th Symposium on Polar Biology, December 2014, National Institure of Polar Research, Tokyo.

Sakai, Y. & N. Okuda, Intraspecific differences in vertical habitat and food utilization by crustacean zooplankton: stable isotopic evidence. ISRLE2014, 2014.08.24-2014.08.27, Chuncheon,Korea.

Ban, S., Q. Wu, Hishida,N. ,Fujita, K. , Nagafuchi,O., and Okuda, N. Bioaccumulation of mercury from seston to fish through the food web in Lake Biwa. ISRLE2014, 2014.08.24-2014.08.27, Chuncheon,Korea.

Cid, A.P.,Song, U. ,Tayasu, I. , Okano, J.,Togashi,H. , Ishikawa, N.,Murakami, A. ,Hayashi,T. , Iwata,T., Osaka,K., Nakano,S. and Okuda,N. “Tracking phosphorus sources and cycling in freshwater: stable isotope approach”. JpGU Meeting 2014, 2014.04.28-2014.05.02, Yokohama city.

【Invited Lecture / Honorary Lecture / Panelist】

Papa, RDS. Science Publicity: Using the Web, mainstream and Social Media. Seminar-Workshop on Technology-enhanced Teaching and Learning, 2016.11.04, College of Science, UST.

Papa, RDS.Antonio Luna as a student of the University of Santo Tomas. Lecture delivered during the General Antonio Luna 150th Birth Anniversary. Antonio Luna Parade Grounds (Sunken Garden),, 2016.10.29, University of the Philippines Diliman.  . Papa, RDS.Antonio Luna as a student of the University of Santo Tomas. Lecture delivered during the General Antonio Luna 150th Birth Anniversary. , 2016,10,29, Antonio Luna Parade Grounds (Sunken Garden), University of the Philippines Diliman.  

Papa, RDS. UST-ZESL’s Contribution to Fisheries Science: Aquatic Invertebrate Researches and the Utilization of Limnological Time-Series Data to Support Sustainable Fisheries, Biodiversity and Conservation Biology of Philippine Inland Waters. 7th Fisheries Science Congress, 2016.09.29, Tagaytay International Convention Center, Tagaytay City..

Briones, JCA. EM Peralta. The parasite checklist of Philippine fishes in comparison to mathematically-modelled host/parasite checklists from fish FISHPEST: how many parasites are there really?. 48thAnnual National Convention of the Federation of Institutions for Marine and Freshwater Sciences (FIMFS), 2016.09.21-2016.09.23, University of Eastern Philippines, Catarman, Samar, Philippines ..

Papa, RDS. Lake Taal: Sustaining native biodiversity in the face of aquaculture, climate change, and non-native species. 2016 TVPL Research Summit, 2016.08.04-2016.08.05, NDN Grand Hotel, Santo Tomas, Batangas.

Papa, RDS. Lake Taal: Sustaining native biodiversity in the face of aquaculture, climate change, and non-native species. Partnerships for Enhanced Engagement in Research (PEER) Speakers Series, 2016.07.07, USAID Headquarters, Washington DC, USA.

Briones, JCA. Fish parasite research in the Philippines: history current state, and recommendations for future directions. The 1st Philippine Symposium in Freshwater Biodiversity and Ecosystems, 2016.06.07-2016.06.10, University of Santo Tomas, Manila,Philippines. .

Papa, RDS. Updating our knowledge of Philippine lakes and other freshwater ecosystems: from limno-ecology to biodiversity. 6th Science Lecture Series of the Biology Department, College of Arts and Sciences, 2016.02.23, Domingo Building, UE Graduate School.

Papa, RDS. Updating our knowledge of Philippine lakes and other freshwater ecosystems: from limno-ecology to biodiversity. Seminar on Current Researches, Conservation and New Management Practices. its impact on Philippine Freshwater biota, 2016.02.18, Southern Luzon State University, Lucban, Quezon.

Papa, RDS. Science Publicity: Using the Web, Mainstream and Social Media. 2016 Research Fortnight: Researchers’ Forum on Enhancing Research Visibility, 2016.02.16, Tanghalang Teresita Quirino, Benavides Building,University of Santo Tomas,Philippine..

Okuda, N. Biodiversity-driven Nutrient Cycling and Human Well-being in Social-Ecological Systems. 4th Future Earth in Asia Workshop "Perspectives from the South", 2015.11.19, Lecture Hall, RIHN, Kyoto.  http://www.chikyu.ac.jp/future_earth/events_eng.html

Okuda, N. Organization of Symposium Session "Methanotrophic food webs as a carbon recycling system". The 62nd ESJ Annual Meeting, 2015.03.21, Kagoshima.