Research Institute for Humanity and Nature

Staff Profile

NameOKUDA Noboru
AffiliationResearch Department
PositionAssociate Professor
Arrival day2014-10-01
Leaving the office day 
Year of Birth1969
Professional CareerLecturer, Mie University, Department of Liberal Arts (1998)
Postdoctoral fellow, Ehime University, Department of Biology and Earth Science (1998)
Research Fellow, Ehime University, Center for Marine Environmental Studies (2002)
Associate Professor, Kyoto University, Center for Ecological Research (2005)
Invited Associate Professor, Research Institute for Humanity and Nature (2013)
Associate Professor, Research Institute for Humanity and Nature (2014)
Higher DegreesB.S. (Science University of Tokyo, Department of Biological Science, 1992)
M.S. (Ehime University, Department of Biology, 1994)
Ph.D. (Kyoto University, Department of Biology, 1998)
Academic Society MembershipsThe Ichthyological Society of Japan
The Ecological Society of Japan
Japan Ethological Society
Society of Evolutionary Studies
The Japanese Society of Fisheries Science
The Japanese Society of Limnology
AwardsBest Poster Award for International Symposium “Long-term Variations in the Coastal Environments and Ecosystems” held in Ehime University (2004)
Young Ichthyologist Award 2005 from The Ichthyological Society of Japan (2005)
CHED REPUBLICA AWARDS(2016)
35th Association of Systematic Biologists of the Philippines-Symposium and Annual Meeting「Taxonomic Sufficiency: Implications from ecological studies on aquatic insects in Philippine watersheds」 (2017)
Ecological Research Award: Integrating isotopic, microbial, and modeling approaches to understand methane dynamics in a frequently disturbed deep reservoir in Taiwan. By Itoh, M., H. Kojima, P.-C. Ho, C.-W. Chang, T.-Y. Chen, S. S.-Y. Hsiao, Y. Kobayashi, M. Fujibayashi, S.-J. Kao, C.-h. Hsieh, M. Fukui, N. Okuda, T. Miki & F.-K. Shiah (2018)

 

Books

【Authored/Co-authored】

Okuda, N., T. Takeyama, T. Komiya, Y. Kato, Y. Okuzaki, Z. Karube, Y. Sakai, M. Hori, I. Tayasu & T. Nagata 2020 A food web and its long-term dynamics in Lake Biwa: a stable isotope approach. In: Lake Biwa: Interactions between Nature and People (2nd Edition). (Eds. Kawanabe, H. et al.). Springer Academic, Amsterdam. (in press)

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

【Chapters/Sections】

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. Asia-Pacific Biodiversity Observation Network. Springer Japan, Chiyoda-ku,Tokyo, pp.151-166. DOI:10.1007/978-4-431-54783-9

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

Okuda, N., T. Takeyama, T. Komiya, Y. Kato, Y. Okuzaki, Z. Karube, Y. Sakai, M. Hori, I. Tayasu & T. Nagata 2012 A food web and its long-term dynamics in Lake Biwa: a stable isotope approach. Kawanabe, H. et al (ed.) Lake Biwa: Interactions between Nature and People.. Springer Academic, Amsterdam, pp.205-210.  http://www.ecology.kyoto-u.ac.jp/~nokuda/research&education/paper%20PDF/Okuda%202012a.pdf

Papers

【Original Articles】

Peralta, E. M., L. S. Batucan Jr., I. B. B. De Jesus, E. M. C. Triño, Y. Uehara, T. Ishida, Y. Kobayashi, C.-Y. Ko, T. Iwata, A. S. Borja, J. C. A. Briones, R. D. S. Papa, F. S. Magbanua & N. Okuda 2020,01 Nutrient loadings and deforestation decrease benthic macroinvertebrate diversity in an urbanised tropical stream system. Limnologica 80. DOI:https://doi.org/10.1016/j.limno.2019.125744 (in press)

Fukushima, S., Takemura, K., Uchida, Y., Asano, S., & Okuda, N 2020 Dual Nature of Trust Within a Community: Individual-level Effect of Trust on Well-being is Positive but its Contextual Effect is Negative. Psychologia. (in press)

Kondo,Y., A.Miyata, U.Ikeuchi, S.Nakahara, K.Nakashima, H.Ōnishi, T. Osawa, K. Ota, K.Sato, K.Ushijima, Bianca Vienni Baptista, T.Kumazawa, K.Hayashi, Y. Murayama, N..Okuda, H.Nakanishi 2019,10 Interlinking open science and community-based participatory research for socio-environmental issues. Current Opinion in Environmental Sustainability 39:54-61. DOI:10.1016/j.cosust.2019.07.001 (reviewed).

Mendoza, M. U., J. C. A. Briones, M. Itoh, K. S. A. R. Padilla, J. I. Aguilar, N. Okuda & R. D. S. Papa 2019,09 Small maar lakes of Luzon Island, Philippines: their limnological status and implications on the management of tropical lakes – a review. . Philippine Journal of Science 148( (3)):559-572. DOI:http://philjournalsci.dost.gov.ph/accepted-articles/94-next-issue/vol-148-no-3-september-2019/1103-small-maar-lakes-of-luzon-island-philippines-their-limnological-status-and-implications-on-the-management-of-tropical-lakes-a-review

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

Okano,J., J.Shibata, Y.Sakai, M.Yamaguchi, M.Ohishi, Y.Goda, S.Nakano, N.Okuda 2017,10 The effect of human activities on benthic macroinvertebrate diversity in tributary lagoons surrounding Lake Biwa. The Japanese Society of Limnology 2017:1-9. DOI:10.1007/s10201-017-0530-2

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

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

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).

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

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:http://doi.org/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 . DOI

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 (in Japanese) Ohba, S., N. Okuda & S. Kudo (2016) . 3: 150720

Kakioka, R., T. Kokita, H. Kumada, K. Watanabe & N Okuda 2015,08 Genomic architecture of habitat-related divergence and signature of directional selection in the body shapes of Gnathopogon fishes. Molecular Ecology 24(16):4159-4174. DOI:10.1111/mec.13309

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).

Peralta, E. M. Peralta, A. E. Belen, G. R. Buenaventura, F. G. G. Cantre, K. G. R. Espiritu, J. N. A. De Vera, C. P. Perez, A. K. V. Tan, I. B. B. De Jesus, P. Palomares, J. C. Briones, T. Ikeya, F. S. Magbanua, R. D. S. Papa, and N. Okuda 2019,07 Stream benthic macroinvertebrate assemblages reveal the importance of a recently established freshwater protected area in a tropical watershed.. Pacific Science 73(3):305-320. DOI:10.2984/73.3.1 (reviewed).

Ko, C.-Y., T. Iwata, J.-Y. Lee, A. Murakami, J. Okano, N. Ishikawa, Y. Sakai, I. Tayasu, M. Itoh, U. Song, H. Togashi, S. Nakano, N. Ohte & N. Okuda 2018,11 Assessing alpha and beta diversity of benthic macroinvertebrates and their environmental drivers between watersheds with different levels of habitat transformation in Japan.. Marine and Freshwater Research 61:1-9. DOI:10.1071/MF18031 (reviewed).

Lambino, R., C. Muan, J. Siapno, Ro. Bonifacio, A. Santos-Borja & N. Okuda 2018,10 Governance gaps and prospects in the Sta. Rosa Watershed of Laguna Lake, Philippines.. Proceeding of the 17th World Lake Conference,:820-822.

Privaldos, O. L. A., K. Osaka, Y. Uehara, S. Asano, L. Fujiyoshi, C. Yoshimizu, I. Tayasu, A. C. Santos-Borja, M. P. B. Espino & N. Okuda 2018,10 Identification Nitrate Sources in Groundwaters of Silang-Sta. Rosa Subwatershed: Toward the Watershed Governance.. Proceeding of the 17th World Lake Conference:477-479.

Siapno, J., R. Bonifacio, A. Santos-Borja & N. Okuda 2018,10 Evolution of a hybrid framework for adaptive watershed governance in a micro-watershed scale Laguna de Bay Basin, Philippines. Proceeding of the 17th World Lake Conference:1385-1387.

Saitoh, Y., T. Nakano, K.-C. Shin, J. Matsubayashi, Y. Kato, H. Amakawa, Y. Osada, C. Yoshimizu, N. Okuda, Y. Amano, H. Togashi, Y. Kurita & I. Tayasu 2018,08 Utility of Nd isotope ratio as a tracer of marine animals: regional variation in coastal seas and causal factors. Ecosphere 9((8):e02365). DOI:10.1002/ecs2.2365 (reviewed).

Mizuno, K., A. Asada, S. Ban, Y. Uehara, T. Ishida & N. Okuda 2018,07 Validation of a high-resolution acoustic imaging sonar method by estimating the biomass of submerged plants in shallow water. Ecological Informatics 46:179-184. DOI:10.1016/j.ecoinf.2018.07.002 (reviewed).

Kato, Y., M. Kondoh, N. Ishikawa, H. Togashi, Y. Kohmatsu, M. Yoshimura, C. Yoshimizu, T. Haraguchi, Y. Osada, N. Ohte, N. Tokuchi, N. Okuda, T. Miki, I. Tayasu 2018,05 Using food network unfolding to evaluate food-web complexity in terms of biodiversity: theory and applications.. Ecology Letters 21:1065-1074. DOI:10.1111/ele.12973 (reviewed).

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/

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).

Ishida, T., Y. Uehara, T. Iwata, A. P. Cid-Andres, S. Asano, T. Ikeya, K. Osaka, J. Ide, O. L. A. Privaldos, I. B. B. De Jesus, E. M. Peralta, E. M. C. Triño, C. Ko, A. Paytan, I. Tayasu, N. Okuda 2019,04 Identification of phosphorus sources in a watershed using a phosphate oxygen isoscape approach.. Environmental Science & Technology 53(9):4707-4716. DOI:10.1021/acs.est.8b05837 (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).

Cabanillas-Terán, N., P. Loor-Andrade, J. Marin & N. Okuda 2015,04 Algal diversity drives trophic niche partitioning between sympatric grazers in marine rocky reefs. CENTER FOR ECOLOGICAL RESEARCH NEWS, KYOTO UNIVERSITY 129:13-13. (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).

Ohba, S., K. Suzuki, Y. Sakai, J. Shibata & N. Okuda 2019,10 Effects of irrigation system alterations on the trophic position of a threatened top predator in rice-field ecosystems . Freshwater Biology 64(10):1737-1746. DOI: 10.1111/fwb.13365

Ishikawa, N. F., Y. Kato, H. Togashi, M. Yoshimura, C. Yoshimizu, N. Okuda and I. Tayasu (in press) 2014,07 Stable nitrogen isotopic composition of amino acids reveals food web structure in stream ecosystems. Oecologia 175(3):911-22. (reviewed).

Kojima, H., R. Tokizawa, K. Kogure, Y. Kobayashi, M. Itoh, N. Okuda, F.-K. Shiah and 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).

Shiah, F.-K., Y. Kobayashi, M. Itoh & N. Okuda 2014,03 Distribution of methane oxidizing bacteria in the Fei-Tsui reservoir, Taiwan. CENTER FOR ECOLOGICAL RESEARCH NEWS, KYOTO UNIVERSITY(123):9-9. (reviewed).

Hamaoka, H., A. Kaneda, N. Okuda & K. Omori 2014,01 Upwelling-like bottom intrusion enhances the pelagic-benthic coupling by a fish predator in a coastal food web. Aquatic Ecology 48(1):63-71. (reviewed).

Uchii, K., N. Okuda, T. Minamoto & Z. Kawabata 2013,06 An emerging infectious pathogen endangers an ancient lineage of common carp by acting synergistically with conspecific exotic strains. Animal Conservation 16:324-330. (reviewed).

Ohbayashi K., Y. Hodoki, Y. Kobayashi, N. Okuda & S. Nakano 2013,04 Genotypic composition and the relationship between genotypic composition and geographical proximity of the cyanobacterium Microcystis aeruginosa in western Japan. Canadian Journal of Microbiology 59:266-272. (reviewed).

Sakai Y., Z. Karube, T. Takeyama, A. Kohzu, C. Yoshimizu, T. Nagata, I. Tayasu & N. Okuda 2013,01 Seasonal and site-specific variability in terrigenous particulate organic carbon concentration in near-shore waters of Lake Biwa, Japan. Limnology 14:167-177. (reviewed).

Kobayashi, Y., Y. Hodoki, K. Ohbayashi, N. Okuda & S. Nakano 2013,01 Grazing impact on the cyanobacterium Microcystis aeruginosa by the heterotrophic flagellate Collodictyon triciliatum in an experimental pond. Limnology 14(1):43-49. (reviewed).

Kakioka R., T. Kokita, H. Kumada, K. Watanabe & N. Okuda 2013,01 A RAD-based linkage map for QTL analysis and comparative genomics in the gudgeons (genus Gnathopogon, Cyprinidae). BMC Genomics 14:32. (reviewed).

Hodoki Y., K. Ohbayashi, Y. Kobayashi, N. Okuda & S. Nakano 2013,01 Anatoxin-a-producing Raphidiopsis mediterranea Skuja var. grandis Hill is one ecotype of non-heterocytous Cuspidothrix issatschenkoi (Usačve) Rajaniemi et al. in Japanese lakes. Harmful Algae 21−22:44-53. (reviewed).

Ohba, S., J. Takahashi & N. Okuda 2013 A non-lethal sampling method for estimating the trophic position of an endangered giant water bug using stable isotope analysis. Insect Conservation and Diversity 6:155-161. (reviewed).

Briones, J. C., C.-H. Tsai, T. Nakazawa, Y. Sakai, R. D. S. Papa, C.-H. Hsieh & N. Okuda 2012,12 Long-term changes in the diet of Gymnogobius isaza from Lake Biwa, Japan: effects of body size and environmental prey availability. PLoS ONE 7(12):e53167. (reviewed).

Araki, K. S., T. Nakazawa, A. Kawakita, H. Kudoh & N. Okuda 2012,03 Development of nine markers and characterization of the microsatellite loci in the endangered Gymnogobius isaza (Gobiidae). International Journal of Molecular Sciences 13(5):5700-5705. DOI:10.3390/ijms13055700 (reviewed).

Research Presentations

【Oral Presentation】

Takuya Takahashi, Yukiko Uchida, Hiroyuki Ishibashi, Noboru Okuda How does forest ownership influence forest-related subjective well-being? A case study in the upper Yasu River watershed, Shiga Prefecture, Japan. Society For Environmental Economics and Policy Studies 24th Annual Conference(環境経済・政策学会2019年大会), 2019.09.28-2019.09.29, Fukushima university. Fukushima city. (共著発表)

Aguilar, J. F., P. Cootauco, J. A. T. DE Guzman, P. A. Mauricio, C. Remperas, N. Okuda & R. D. S. Papa R Monsoon-driven variations in the vertical profile of the Seven Maar Lakes of San Pablo, Laguna: Diving deeper in the limnology of tropical maar lakes. 50th Annual Convention of the Federation of Institutions for Marine and Freshwater Sciences (FIMFS), 2018.10.24-2018.10.25, Silliman University, Dumaguete.

Papa R. D. S., J. F. I. Aguilar, P. A. B. Cootauco, J. A. P. De Guzman, P. A. C. Mauricio, C. T. A. Remperas & N. Okuda Monsoon-based variations in the vertical profile of selected limnological parameters in in the Seven Maar Lakes (SML’s) of Laguna (Luzon Is., Philippines): A unique insight into the limnology of tropical maar lakes. , 2018.08.19-2018.08.24, Nanjing, China.

Okuda, N., T. Ishida, Y. Uehara, T. Ikeya, S. Asano, T. Iwata, C.-Y. Ko, E. Peralta, O. L. A. Privaldos, I. B. De Jesus, E. M. Triño, K. Osaka, I. Tayasu "Biodiversity and phosphorus cycling in the river ecosystem". JpGU-AGU Joint Meeting 2018, 2018.05.20, Makuhari Messe. Chiba.

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.

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, Chetumal, Quintana Roo.

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, University of St. La Salle, Bacolod City.

Iwata. T., T. Hayashi, M. Akashi, A. R. Murakami & N. Okuda “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, 2017.05.21, 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 & N. Okuda “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, 2017.05.21, Makuhari Messe.

Onodera, S., M. Saito, S. Ban, G. Jin, Y. Tomozawa & N. Okuda “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, 2017.05.21, Makuhari Messe. , May 21, ,

Peralta, E. M., L. Batucan, Y. Uehara, T. Ishida, Y. Kobayashi, C.-Y. Ko, T. Iwata, A. Borja, J. C. Briones, R. D. Papa, F. Magbanua & N. Okuda “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, 2017.05.21, Makuhari Messe.

Ko, C.-Y., T. Iwata, J.-Y. Lee, A. Murakami, J. Okano, N. F. Ishikawa, Y. Sakai, I. Tayasu, M. Itoh, U. Song, H. Togashi, S. Nakano, N. Ohte & N. Okuda “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, 2017.05.21, Makuhari Messe.

Fujinaga, S., Y. Kobayashi, A. R. Murakami, M. Ushio, U. Song, I. Tayasu, N. F. Ishikawa, J. Okano, C.-Y. Ko, H. Togashi, Y. Sakai, M. Itoh, N. Ohte, S. Nakano, T. Iwata1 & N. Okuda “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, 2017.05.21, Makuhari Messe.

Ide, J., A. P. Cid-Andres, T. Ishida, K. Osaka, T. Iwata, T. Hayashi, M. Akashi, I. Tayasu & N. Okuda “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, 2017.05.21, Makuhari Messe.

Osaka, K., S. Chishiro, T. Iwata & N. Okuda “The quantitative evaluation of bio-available particulate phosphorus discharged from Yasu River”. n: Biodiversity, nutrients and other materials in ecosystems from headwaters to coasts. JpGU-AGU Joint Meeting 2017, 2017.05.21, Makuhari Messe.

Ishida, T., Y. Uehara1, T. Iwata, O. Privaldos, S. Asano, T. Ikeya, K. Osaka, J. Ide, I. Tayasu & Noboru Okuda “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, 2017.05.21, Makuhari Messe.

De Jesus, I. B. B., J. C. A. Briones, O. L. A. Privaldos, E. M. Peralta, Y. Uehara, T. Ishida, A. S. Borja, F. S. Magbanua, R. D. S. Papa, T. Iwata & N. Okuda “Quantification of phosphorus and nitrogen uptake in a tropical freshwater ecosystem in Southeast Asia suggests N limitation”. n: Biodiversity, nutrients and other materials in ecosystems from headwaters to coasts. JpGU-AGU Joint Meeting 2017, 2017.05.21, 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, Makuhari Messe.

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?. 37th Asian Conference on Remote Sensing, 2016.10.17-2016.10.21, Colombo.

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 .

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. (in Japanese)

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.

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,.

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.

Fukushima, S., K. Takemura, Y. Uchida, S. Asano & N. Okuda When does mutual trust among community members lower their happiness?: Moderating effect of residential mobility. Society for Personality and Social Psychology (SPSP) Annual Convention 2020, 2020.02.27-2020.02.29, New Orleans, USA.

Uehara Y., Okuda,N Fish nursery paddy field project. Japan-Korea Rural planning seminar2019, 2019.10.19, Otsu, Shiga.

Yachi, S., S. Asano, T. Ikeya, H. Ishibashi, T. Ishida, Y. Uehara, K. Wakita & N. Okuda Diversity of community revitalization process and its relation with biodiversity in the Yasu-River sub-watershed. Japan-Korea Rural Planning Seminar 2019 by The Association of Rural Planning, 2019.10.19, Otsu,Shiga.

Cabardo, J. A. I. V., F. C. R. Ramirez, O. L. Privaldos, Y. Uehara, T. Ishida, L. Fujiyoshi, K. Osaka, F. Magbanua, R. D. Papa & N. Okuda Quantification of soluble reactive phosphorus in the Silang-Santa Rosa subwatershed”. Philippine Association for the Advancement of Science and Technology (PhilAAST) Conference, 2019.09.11-2019.09.12, Pasay City, Philippines.

Nakano, S., K.-H. Chang, H. Doi, Y. Hodoki, N. Ishii, Z. Kawabata, Y. Kobayashi, P. M. Manage, Y. Nishibe, K. Ohbayashi & N. Okuda Planktonic processes and food web structure/dynamics in shallow ponds, with special reference to cyanobacterial bloom . Society of Wetland Scientists-Asia Chapter and Korean Wetlands Society Joint Meeting, 2019.08.19-2019.08.22, Suncheon City, Korea.

Kondo, Y., A. Miyata, U. Ikeuchi, S. Nakahara, K. Nakashima, H. Onishi, T. Osawa, K. Ota, K. Sato, K. Ushijima, B. V. Baptista, T. Kumazawa, K. Hayashi, Y. Murayama, N. Okuda, H. Nakanishi Interlinking open science to team-based action research for socio-environmental cases. SciTS 2019 Conference, 2019.05.20-2019.05.23, Lansing, Michigan.

Huang, J.L., N. Okuda, C.-Y. Ko "Unraveling species-area relationship and hierarchical community assemblage in river ecosystems". 6th Taiwan-Japan Ecology Workshop, 2018.11.22-2018.11.26, National Cheng Kung University, Taiwan.

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.

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, 2016.05.22-2016.05.26, Makuhari Messe.

Onodera, S., Saito, M., Jin, G., Rusydi, A., Tomozawa, Y., Wang, K., Ban, S., Okuda, N Phosphorus discharge via groundwater into the lake, based on lacustrine groundwater discharge (LGD) and alluvial plain sediment. JpGU 2019 meeting, 2019.05.26-2019.05.30, Makuhari,Chiba.

Okuda, N., Z. Karube, Y. Sakai, T. Takeyama, I. Tayasu, C. Yoshimizu & T. Nagata Biodiversity increases integrated trophic position of macroinvertebrate communities in coastal food webs: Testing the vertical diversity hypothesis. JpGU 2019 meeting, 2019.05.26-2019.05.30, Makuhari,Chiba.

Peralta, E. M., L. S. Batucan Jr., A. E. Belen, I. B. B. De Jesus, T. Ishida, C.-Y. Ko, Y. Kobayashi, T. Ikeya, Y. Uehara, T. Iwata, A. S. Borja, J. C. A. Briones, F. S. Magbanua, R. D. S. Papa & N. Okuda Multiple stressors and protection efforts in highly urbanized watersheds in the Philippines. JpGU 2019 meeting, 2019.05.26-2019.05.30, Makuhari,Chiba.

Gregorio, J. A. N., E. M. Peralta, I. B. B. De Jesus, T. Ikeya, J. C. A. Briones, R. D. S. Papa, F. S. Magbanua & N. Okuda Benthic macroinvertebrate assemblages and water quality reflect the impacts of land use and land cover in Marikina Watershed, Philippines. JpGU 2019, 2019.05.26-2019.05.30, Makuhari Messe,Chiba.

Ikeya, T., T. Ishida, Y. Uehara, S. Asano, I. Tayasu, N. Okuda, M. Ushio, S. Fujinaga, C.-Y. Ko, E. M. Peralta, N. F. Ishikawa & T. Iwata The analysis of the community composition of riverine bacteria and microalgae in relation to nutrient status and diversity: the case in irrigation season in the Yasu River, Japan. JpGU 2019 meeting, 2019.05.26-2019.05.30, Makuhari Messe,Chiba..

Saito, M., Onodera, S., Tomozawa, Y., Wang, K., Ban, S., Okuda, N Evaluation for temporal variation in groundwater inflow to the lagoons connected to Lake Biwa by radon (222Rn) tracer analysis. JpGU 2019 meeting, 2019.05.26-2019.05.30, Makuhari,Chiba.

Tomozawa, Y., Wang, K., M.Saito ,S. Ban, N.Okuda, S.Onodera Altitude effect of water stable isotopic ratio of ravine water and its contribution to groundwater in alluvial plains - Comparison in east and west side catchments of Lake Biwa. JpGU 2019 meeting, 2019.05.26-2019.05.30, Makuhari,Chiba.

Peralta, E. M., F. S. Magbanua, J. C. A. Briones, N. Okuda & R. D. S. Papa Stream benthic macroinvertebrate assemblages reflect anthropogenic impacts and protection status of in the two watersheds of Laguna de Bay, Philippines. 50th Annual Convention of the Federation of Institutions for Marine and Freshwater Sciences (FIMFS), 2018.10.24-2018.10.25, Silliman University, Dumaguete.

Mendoza, M. U., K. S. R. Padilla, J. Aguilar, M. Itoh, N. Okuda & R. D. S. Papa What can we learn from determining methane concentrations in freshwater lake ecosystems?. 50th Annual Convention of the Federation of Institutions for Marine and Freshwater Sciences (FIMFS), 2018.10.24-2018.10.25, Silliman University, Dumaguete.

Aguilar, J. F., K. S. A. Padilla, M. U. Mendoza, N. Okuda & R. D. S. Papa "Are the Twin Lakes’of San Pablo ‘identical’?". The 34th Congress of International Society of Limnology, 2018.08.19-2018.08.24, Nanjing, China.

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.

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.,U. Song, I. Tayasu, J. Okano, H. Togashi, N.F. Ishikawa, A. Murakami, T. Hayashi, T. Iwata , K. Osaka, S. Nakano & N. Okuda 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. (in Japanese)

Okuda, N., A. P. Cid, I. Tayasu & J. Ide Phosphate oxygen isotope analysis to study phosphorous cycling. JPGU 2015, 2015.05.24-2015.05.28, Chiba City.

Okuda, N. What's the methanotrophic food web?. The 62nd ESJ Annual Meeting, 2015.03.18-2015.03.22, Kagoshima.

Ho, P.-C., N. Okuda, M. Itoh, T. Miki, F.-K. Shiah, C.-W. Chang and 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.

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 climate changes. The 62nd ESJ Annual Meeting, 2015.03.18-2015.03.22, Kagoshima.

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.

Kakioka, R., T. Kokita, H. Kumada, K. Watanabe & N. Okuda Genetic architecture of habitat-related divergence in body shape in Gnathopogon (Teleostei: Cyprinidae). 9th Indo-Pacific Fish Conference, 2013.06.24-2013.06.28, okinawa.

Ishikawa, N. F., Y. Kato, H.Togashi, M. Yoshimura, C. Yoshimizu, N. Okuda & I. Tayasu. Analysis of stream food webs using stable nitrogen isotope ratios of amino acids. JpGU Meeting 2013, 2013.05.19-2013.05.24, Ciba-city.

Shibata, J., Z. Karube, Y. Sakai, T. Takeyama, I. Tayasu, Y. Satoh, S. Yachi, S. Nakano & N. Okuda Historical and geographical patterns of biodiversity in the ancient Lake Biwa, Japan. International Workshop on Freshwater Biodiversity Conservation in Asia, 2012.11.26-2012.11.27, Fukuoka.

Shibata, J., Z. Karube, Y. Sakai, T. Takeyama, I. Tayasu, Y. Satoh, S. Yachi, S. Nakano & N. Okuda Environmental pressures for littoral benthic macro-invertebrate fauna in large lake ecosystem. International Conference on Indonesian Inland Waters III, November 2012, Palembang, Indonesia.

Nakano, S., H. Amano, S. Hiroishi, Y. Hodoki, T. Honma, T. Kataoka, Y. Kobayashi, R. Kondo, K. Ohbayashi, N. Okuda, Y. Takao, Y. Tanabe, T. Tanaka & M. M. Watanabe Ecophysiology and phylogeography of bloom-forming cyanobacterium Microcystis aeruginosa in Asian eutrophic lakes. The 15th International Symposium on River and Lake Environments, 2012.10.15-2012.10.19, Zhangjiajie.

Okuda, N Watershed governance: a case in the Lake Biwa Watershed. RIHN International Symposium 2019: Fair use of multiple resources in cross-scale context, 2019.07.11-2019.07.12, RIHN, Kyoto.

Okuda N., Y. Kato, T. Komiya, Y. Okuzaki, M. Hori, I. Tayasu & T. Nagata Biological specimens tell us a centurial history of ecosystem alterations in the ancient Lake Biwa. 2012 ASLO Aquatic Sciences Meeting, 2012.07.08-2012.07.13, Otsu City.

Briones, J. A., C. Tsai, T. Nakazawa, Y. Sakai, M. Urabe, R. Papa, C. Hsieh, N. Okuda. Long-term changes in the diet and intestinal parasite fauna ofGymnogobius isaza from Lake Biwa, Japan: Effects of body size and prey availability. 2012 ASLO Aquatic Sciences Meeting, 2012.07.08-2012.07.13, Otsu.

Peralta E, Magbanua FS, Briones JCA, Okuda N, Papa RDS Disentangling multiple stressors and highlighting the importance of freshwater protected area in highly urbanized watersheds in the Philippines. 41st ASM of the National Academy of Science & Technology, 2019.07.10-2019.07.11, EDSA Shangri-La Plaza, Mandaluyong City,Philippine.

Tayasu, I., N. Okuda, N. Tokuchi, N. Ohte & M. Kondoh Multiple isotope approach for studying material flow and food web structures of stream ecosystems in Lake Biwa watershed”. 2012 ASLO Aquatic Sciences Meeting, 2012.07.08-2012.07.13, Otsu.

Mendoza MU, Aguilar JI, Padilla KSAR, Itoh M, Okuda N, Papa RDS The biogeochemical cycling of methane (CH4) in lakes Calibato, Pandin and Yambo: Implications on the lakes’ carrying capacity. 41st ASM of the National Academy of Science & Technology, 2019.07.10-2019.07.11, EDSA Shangri-La Plaza, Mandaluyong City,Philippine.

Uchii K., N. Okuda, T. Minamoto, A. Telschow, Z. Kawabata Transmission dynamics of an emerging pathogen Cyprinid herpesvirus 3 and its impact on host population genetic structure. 2012 ASLO Aquatic Sciences Meeting, 2012.07.08-2012.07.13, Otsu City.

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.

Wang, K., M. Saito, S. Onodera, F. T. Admajaya, S. Ban, N. Okuda, Y. Shimizu “Estimation of lacustrine groundwater discharge into Biwa Lake”. JpGU-AGU Joint Meeting 2018, 2018.05.20, Makuhari,Chiba.

Onodera, S., M. Saito, S. Ban, G. Jin, Y. Tomozawa, N. Okuda “Estimation of Lacustrine Groundwater Discharge (LGD) via two paths in Lake Biwa, Japan”. JpGU-AGU Joint Meeting 2018, 2018.05.20, Makuhari,Chiba.

De Jesus, I. B. B., E. M. Peralta, P. Palomares, J. C. Briones, F. Magbanua, R. D. Papa, T. Iwata, N. Okuda “Spatial variation in phosphorus and nitrogen spiral metrics in a tropical watershed in relation to land uses”. JpGU-AGU Joint Meeting 2018, 2018.05.20, Makuhari,Chiba.

Ikeya ,T., T. Ishida, Y. Uehara, S. Asano, N. Okuda, M. Ushio, S. Fujinaga, Y. Kobayashi, C.-Y. Ko, P. M. Elfritzson, I. Tayasu, T. Iwata “The examination of environmental factors on the community composition of riverine bacteria and microalgae in an epilithon during irrigation season in the Yasu River, Japan”. JpGU-AGU Joint Meeting 2018, 2018.05.20, Makuhari,Chiba.

Peralta, E. M., C. Bacinillo, J. C. Balani, S. Basmala, E. J. S. Calalin, M. A. Calleja, J. B. Go, M. T. Gosiengfiao, F. A. Valdecañas, J.-A. Gregorio, N. Mendoza, T. Ishida, F. Magbanua, J. C. Briones, R. D. Papa, N. Okuda. “Stable Isotopes Reveal Anthropogenic Impacts on the Littoral Food Webs of Laguna de Bay, Philippines". JpGU-AGU Joint Meeting 2018, May 20, 2018.05.20, Makuhari,Chiba.

【Poster Presentation】

Uehara, Y., H. Takayama, Y. Kataoka, T. Kikkou, M. Nemoto, T. Otake, T. Kokita, N. Okuda Migration history of pelagic crucian carp Carassius auratus grandoculis endemic to Lake biwa: Reconstructed from otolith strontium stable isotope. JpGU-AGU Joint Meeting 2018, 2018.05.20, Makuhari Messe. Chiba.

Uehara, Y., Y. Kataoka, T. Kikkou, T. Ishida, S. Asano, Y. Kobayashi, T. Otake & N. Okuda “Migration routes of pelagic crucian carp Carassius auratus grandoculisendemic to Lake Biwa revealed by otolith Sr stable isotopes”. In: Biodiversity, nutrients and other materials in ecosystems from headwaters to coasts. JpGU-AGU Joint Meeting 2017, 2017.05.20, Makuhari Messe.

Jin, G., M. Saito, S. Onodera, T. Ishida, N. Okuda, R. Yi, S. Ban & Y. Tomozawa “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, Makuhari Messe. , May 20, , (Poster)

Asano S., Y. Uehara, H. Nakashima, M. Tokito, I. Saizen, O. L. Privaldos, K. Osaka & N. Okuda “Spatial Pattern of Ground Water Utilization in Silang-Santa Rosa Sub-watershed”. In: Biodiversity, nutrients and other materials in ecosystems from headwaters to coasts. 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, T. Ikeya, F. Magbanua, R. D. Papa & N. Okuda “Stream Benthic Macroinvertebrates Response to Water Quality of Urban and Rural Areas of the Marikina Watershed”. In: Biodiversity, nutrients and other materials in ecosystems from headwaters to coasts. JpGU-AGU Joint Meeting 2017, 2017.05.20, Makuhari Messe.

Espiritu, K. G. R., J. N. A. De Vera, F. G. G. Cantre1, E. M. Peralta, I. B. B. De Jesus, P. Palomares, J. C. Briones, T. Ikeya, F. Magbanua, R. D. Papa & N. Okuda “Land use impact on benthic macroinvertebrate assemblages in selected lotic ecosystems in a government-declared protected landscape”. In: Biodiversity, nutrients and other materials in ecosystems from headwaters to coasts. JpGU-AGU Joint Meeting 2017, 2017.05.20, Makuhari Messe.

Ikeya, T. C.-Y. Ko, E. M. Peralta, T. Ishida, Y. Uehara, S. Asano, N. Okuda, M. Ushio, S. Fujinaga, I. Tayasu& T. Iwata “The community composition and diversity of epilithic bacterium and microalgae in a Japanese river system during irrigation season”. In: Biodiversity, nutrients and other materials in ecosystems from headwaters to coasts. JpGU-AGU Joint Meeting 2017, 2017.05.20, Makuhari Messe. (in Japanese)

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., M. Milette, J. Aguilar, K. Padilla, J. Briones, R. Papa, M. Ito, M. Fujibayashi, T.-H. Tu, L.-H. Lin, P.-L. Wang, Y. Kobayashi, E. Austria, F.-K. Shiah Methanotrophic food webs in tropical lakes: a preliminary report. The 84th Annual Meeting of the Japanese Society of Limnology, 2019.09.27-2019.09.28, Kanazawa University,Kanazawa.

Wang, K., S. Onodera, M. Saito, N. Okuda & T. Okubo Estimation of groundwater recharge and phosphorus transport under different precipitation conditions in a suburban catchment, using SWAT model. JpGU 2019meeting, 2019.05.26-2019.05.30, Makuhar.Chiba.

Siapno, J., R. Bonifacio, A. Santos-Borja & N. Okuda Evolution of a hybrid framework for adaptive watershed governance in a micro-watershed scale Laguna de Bay Basin, Philippines. The 17th World Lake Conferenc, 2018.10.15-2018.10.19, Tsukuba.

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.-A.N. Gregorio, N. Mendoza, T. Ishida, F.S. Magbanua, J.C. A. Briones, R.D.S. Papa, & N. Okuda Littoral food web analysis: stable isotopes reveal anthropogenic impacts on Oreochromis niloticus and its food sources in Laguna de Bay. 8th Fisheries Scientific Conference (SciCon), 2018.09.05-2018.09.06, Pasay City, Philippines.

Siapno, J., R. Bonifacio, A. Santos-Borja & N. Okuda Evolution of a hybrid framework for adaptive watershed governance in a micro-watershed scale Laguna de Bay Basin, Philippines. International Conference: Biodiversity and Ecology Across Space and Time, 2018.08.15-2018.08.16, University Sains Malaysia, Malaysia.

Sakai, Y., Z. Karube, J. Shibata, T. Takeyama, I. Tayasu, S. Yachi, S. Nakano & N. Okuda 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.

Sakai, Y., Z. Karube, J. Shibata, T. Takeyama, I. Tayasu, S. Yachi, S. Nakano & N. Okuda The impact of land uses on benthic macroinvertebrate diversity in the coastal ecosystem of Lake Biwa. ISRLE2014, 2014.08.24-2014.08.27, Chuncheon,Korea.

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

Guinto, M. M. V., H. A. Guerrero, J. C. A. Briones, R. D. S. Papa, N. Okuda Zooplankton Community Structure in the Littoral Zones of Laguna de Bay reflects Land Cover and Nutrient Loading in near-shore areas. JpGU-AGU Joint Meeting 2018, 2018.05.21, Makuhari,Chiba.

Cid, A.P.,U. Song, I. Tayasu, J. Okano, H. Togashi, N.F. Ishikawa, A. Murakami, T. Hayashi, T. Iwata , K. Osaka, S. Nakano & N. Okuda “A new technique to trace phosphorus sources and cycling in watersheds”. ILTER 2013, 2013.10.07-2013.10.12, Seoul.

Privaldos, O. L. A., K. Osaka, Y. Uehara, A. Satoshi, L. Fujiyoshi, C. Yoshimizu, I. Tayasu, A. C. Santos-Borja, M. P. B. Espino, N. Okuda Nitrate Dual-Stable Isotope Analysis Identifies Sources of Groundwater Nitrogen Pollution in the Silang-Sta. Rosa Subwatershed of Laguna de Bay. JpGU-AGU Joint Meeting 2018, 2018.05.21, Makuhari,Chiba.

Cid, A.P.,U. Song, I. Tayasu, J. Okano, H. Togashi, N.F. Ishikawa, A. Murakami, T. Hayashi, T. Iwata , K. Osaka, S. Nakano & N. Okuda “Tracing sources and cycling of phosphorus in a watershed using phosphate isotopes of oxygen”. 78th The Japanese Society of LIMNOLOGY, 2013.09.10-2013.09.13, Otsu City.

Iwata, T., N. Okuda Effects of agricultural practices in rice crop systems on the diversity of periphyton and phosphorus dynamics in streams of the Yasu River watershed. JpGU-AGU Joint Meeting 2018, 2018.05.21, Makuhari,Chiba.

Kobayashi, Y., M. Ito, H. Kojima, C.-H. M. Lin, K. Kuo, K.-W. Wang, M. Fukui, F.-K. Shiah & N. Okuda "Spatio-temporal dynamics of aerobic methane oxidizing bacterial community and its”methanotrophic pathways in the pelagic food web of subtropical Fei-Tsui Reservoir. 13th Symposium on Aquatic Microbial Ecology, 2013.09.08-2013.09.13, Stresa, Italy.

Yi, R., P. Song, M. Maruo, S. Ban, T. Ikeya, N. Okuda What is difference between orthophosphate and SRP in lake waters?. JpGU-AGU Joint Meeting 2018, 2018.05.21, Makuhari,Chiba.

Murakami, A., N. Okuda, T. Iwata, R. Williams & S. Nakano Different land use patterns affect responses of river epilithic biofilms: A case study in Yasu River watershed, Shiga, Japan. 13th Symposium on Aquatic Microbial Ecology, 2013.09.08-2013.09.13, Stresa, Italy.

Okuda, K., Y. Ikeda, J. Takebayasi, T. Kuramoto, T. Kitagawa, N. Okuda, T. Yodo & K. Takata Inter-annual changes in genetic structures of largemouth bass hybrid populations between two subspecies based on SNPs analysis in Japan. 9th Indo-Pacific Fish Conference, 2013.06.24-2013.06.28, Okinawa.

Saito, M., S. Onodera, Y. Tomozawa, K. Wang, S. Ban, N. Okuda Observation for the groundwater inflow to the lagoons connected to Lake Biwa. JpGU-AGU Joint Meeting 2018, 2018.05.21, Makuhari,Chiba.

Cid, A.P.,U. Song, I. Tayasu, J. Okano, H. Togashi, N.F. Ishikawa, A. Murakami, T. Hayashi, T. Iwata , K. Osaka, S. Nakano & N. Okuda Phosphate oxygen isotopes as a tool to trace phosphorus sources and cycling in a watershed. JpGU Meeting 2013, 2013.05.19-2013.05.24, Chiba City.

Shibata, J., Z. Karube, Y. Sakai, T. Takeyama, I. Tayasu, Y. Satoh, S. Yachi, S. Nakano & N. Okuda Historical And Geographical Patterns Of Biodiversity in The Ancient Lake Biwa, Japan. 2012 ASLO Aquatic Sciences Meeting, 2012.07.08-2012.07.13, Otsu city.

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” endemic to Lake Biwa: Evidence from otolith Sr stable isotope. 6th International Otolith Symposium, 2018.04.15-2018.04.20, Keelung, Taiwan.

Kato, Y., N. F. Ishikawa, H. Togashi, M. Yoshimura, M. Itoh, K. Osaka, N. Okuda, N. Ohte, C. Yoshimizu & I. Tayasu Food web analysis based on &delta;<sup>15</sup>N of amino acid in river ecosystem. 2012 ASLO Aquatic Sciences Meeting, 2012.07.08-2012.07.13, Otsu City.

Sakai, Y. & N. Okuda Intraspecific differences in vertical habitat utilization by crustacean zooplankton: stable isotopic evidence. 2012 ASLO Aquatic Sciences Meeting, 2012.07.08-2012.07.13, Otsu.

Shibata J., Z. Karube, Y. Satoh, S. Yachi, S. Nakano & N. Okuda The ancient Lake Biwa as a biodiversity hot spot: how to detect drivers of biodiversity loss?. Planet Under Pressure, 2012.03.26-2012.03.29, London.

Kobayashi Y., Y. Hodoki, K. Ohbayashi, H. Amano, T. Tanaka, N. Okuda & S. Nakano Grazing on the cyanobacterium Microcystis aeruginosa by the heterotrophic flagellate Collodictyon triciliatum in an experimental pond. Joint Meeting of the 59th Annual Meeting of ESJ and the 5th EAFES International Congress, 2012.03.17-2012.03.21, Otsu City.

Shibata J., Z. Karube, Y. Sakai, T. Takeyama, I. Tayasu, Y. Satoh, S. Yachi, S. Nakano & N. Okuda The ancient Lake Biwa as a model of Asian lake ecosystems: historical and geographical patterns of biodiversity. Joint Meeting of the 59th Annual Meeting of ESJ and the 5th EAFES International Congress, 2012.03.17-2012.03.21, Otsu city.

Sakai, Y., K. Fukumori, K. Nishimatsu, I. Tayasu & N. Okuda “Predator feeding functional diversity as a driver for lake food web alterations”. Kyoto University and The University of Tokyo Global COE Joint Symposium, 2012.01.20-2012.01.21, Tokyo.

Kakioka, R., T. Kokita, H. Kumada, K. Watanabe & N. Okuda Next-generation RAD sequencing for the genome-wide genetic marker discovery and linkage analysis in Gnathopogon fishes. Kyoto University and The University of Tokyo Global COE Joint Symposium, 2012.01.20-2012.01.21, Tokyo.

【Invited Lecture / Honorary Lecture / Panelist】

Okuda, N. Biodiversity-driven Nutrient Cycling and Human Well-being in Social-Ecological Systems. The 4th International Workshop on Future Earth in Asia, 2015.11.19, RIHN, Kyoto.  http://www.futureearth.org/asiacentre/fourth-international-workshop-future-earth-asia-perspectives-south

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

Okuda, N. The adaptive watershed governance: science for society. The 2nd Philippine Symposium on Freshwater Biodiversity and Ecosystems, 2018.12.13, University of the Philippines Diliman. Quezon.Philippines.

Okuda, N. Watershed governance to enhance social-ecological health. The 17th World Lake Conference, 2018.10.15-2018.10.18, Tsukuba.

Okuda, N The adaptive watershed governance“linking local and global scales”. International Symposium of Future Earth, 2018.09.24, Fukuoka.