Completed Research

StageCR
Project No.E-02
Project NameInteraction between the Environmental Quality of a Watershed and the Environmental Consciousness: With Reference to Environmental Changes Caused by the Human Use of Land and Water Resources
Project LeaderSEKINO, Tatsuki
URLhttp://www.chikyu.ac.jp/idea/

 

○Research Subject and Objectives

Research Objectives
  People’s  intensions to natural environments must be adequately taken into consideration when human impacts will affect to natural environments. What kinds of values are recognized in natural environments? It is difficult to determine items in nature to be conserved without people’s value judgment on natural environment.  What kinds of environmental qualities are perceived as values? Since people may not share the same natural scientific information about the natural environment and the value judgment,people’s decision may not be always rational. Clarifying the relationship between people’s environmental consciousness and environmental quality and estimating the environmentalchanges occurred by human actions may provide more suitable action plan toward natural environments. In this project, a methodology using both natural andhumane-sociological ways will be tested.

Background

I. Basic concept of the project

  When people are placed in an environment, one may use it to get some benefits,another may conserve it because of existence of endangered organisms and another may ignore it. Why do these differences in attitudes among people occur toward the same environment? Understanding this question is one of the objectives for elucidating relationships between humans and the nature.People’s perception of the environment affects their value judgments on the environment as a basis to determine their attitudes toward it. We define this value judgment system as the “environmental consciousness”. To clarify the relationship between the value judgment of environment and the environmental quality would be an essential to solve global environmental issues.

 

II. Contribution of the project to the global environmental issues

 Forest ecosystem is one of the most important ones under the global environmental change. How does the forest logging change the forest environment? How do people evaluate such environmental changes and the implication of the logging? The aim of the project is relating to the public involvement, which is thought to be the most important in the environmental impact assessment to reach the relevant decision-making.

 

III. Fitness of the project in the framework of the RIHN

  Although natural scientific information about the environment is thought to be important, its application to the public involvement in the environmental impact assessment process has been still immature, particularly in Japan. The project will contribute to make the public involvement being more substantial through the collaboration between the natural science, which analyzes environmental changes, and the social science, which analyzes the environmental consciousness and human activities. The project matches with the main framework of the RIHN, in which the interactive cycle between humans and nature is one of the most important targets.

 

IV. Relationship between study area and global environmental issues

  Various kind of environmental plans have been implemented worldwide. It is very important to assess the environmental impact before the implementation.However, the inadequacies of the environmental impact assessment have been recognized. Although the public involvement (PI) is an important measure for the relevant decision-making and consensus building in the environmental policy, the procedure for the PI in the environmental impact assessment and in the strategic environmental assessment has been still ambiguous. The result of the project will be applicable to the PI procedure.

Significance as an RIHN Project

  Analyses on environmental valuation and the relationship between humans and nature have been studied in academic fields, such as environmental economics and environmental sociology. Although natural scientific information about the environment is thought to be important, its application has been still immature, particularly in Japan. The project has been conducted under the basic understanding of the RIHN that “the root of the so-called global environmental problems lies behind the human culture”. The project has been planned to elucidate the interactive cycles between humans and nature, which is a main framework of the RIHN. The project will contribute to make the public involvement being more substantial through the collaboration between the natural science which analyzes environmental changes and the social science which analyze the environmental consciousness and human activities. The project matches with the main framework of the RIHN, in which the interactive cycle between humans and nature is one of the most important targets.

  It is very important to assess the environmental impact before the implementation. However, the in adequacies of the environmental impact assessment has been recognized. Although the public involvement (PI) is an important measure for the relevant decision-making and consensus building in the environmental policy, the procedure for the PI in the environmental impact assessment and in the strategic environmental assessment has been still ambiguous. The number of researches on environmental planning, in which simulation models of environmental changes are applied, has been increasing (cf. Kaga 2006, Takamura2007). In some researches on the environmental restoration and conservation,the techniques based on the environmental economics such as contingent valuation method (CVM) have been applied (Takamura 2007). Although they are resemble our project, their main contribution is not the construction of the substantial PI, but the evaluation of the environmental policies. Relationship between environmental qualities and people’s environmental consciousness has been less considered in these research. Various kind of environmental plans have been implemented worldwide. The result of the project will be applicable to the PI procedure.

○Progress and Results in 2017

Outcomes of the project as a whole

I.Development of a response-prediction model of a watershed environment to thechanges in land and water resource uses

The PnET-CN model developed by the US forest scientists was applicable to simulate material cycling and vegetation dynamics in the study areas. An hydrologic model (HYCYMODEL, Fukushima 1988) was used for estimating nutrient and water loads from forest to river. Lake water flow model and biogeochemical simulation model have been developed for Lake Shumarinai. Virtual impacts of tree-cutting plans were introduced into the models and assessed their impacts to the watershed environment. Such virtual impacts were used for preparing the scenario questionnaire.

 

II. Elucidation of the relationship between the environmental quality and the sense of value for environments in the environmental consciousness

Questionnaire on people’s interests in a forest-agricultural-aquatic system was conducted to determine ranges of type and scale of virtual impact to the environment. Factor analyses of the questionnaire revealed that people seemed to evaluate environments similarly, with respect to the categories such as direct use value, indirect use values and environmental functions. Assuming several parameters based on direct and indirect use values, we can analyze people’s interests in the watershed environment from the viewpoints of environmental values and people’s attitude. There were differences in preferences of objectives and plans of forest loggings among people. Agriculturists tended to prefer larger logging at adjacent areas. Among environmental changes caused by tree-cutting plans in the forested watershed, deteriorations of water quality in rivers and lake was the most disreputable one. Diversity and uniqueness of people’s environmental value judgment have, thus, been elucidated.

Results of each work group

I. RPM group

Review papers (the Japanese Journal of Limnology, vol.67, 2006) and summary report have been published (Katsuyama and Yoshioka 2006).Research results of each subgroups are as follows.

(1) Carbon and nitrogen cyclings in forest environments

To estimate material cycles and vegetation dynamics, we chose and run the PnET-CN model developed by US forest scientists, using measured data as an input.

The model simulated well the patterns of the biomass increment and leaf nitrogen concentration, and the variations in stream NO3-concentrations observed in the forested watershed with different forest ages in Wakayama and Nara prefectures. It suggested that the PnET-CN model could be applicable to our project. Recovery processes of forest biomass were different among type of vegetation (broad leaf and conifers) logged (Fig. 2). Temporal changes in NO3- loading to streams were also different.The model was also applicable to other type of environmental changes. It suggested that the effect of the increase in atmospheric nitrogen deposition on the stream NO3- concentration was compensated by the increase in atmospheric CO2 concentration (Fig. 3).

(2) Rainfall-run off model The simulation using the hydrologic cycle model developed for the Japanese forested watershed(HYCYMODEL) was able to reproduce the seasonal pattern of the monthly NO3-concentration. Monthly water and nutrient loads from forests calculated by the PnET-CN model were distributed into streams using the HYCYMODEL.(3) Lake model Simulation model of the water flow and biogeochemical cycling in a lake has been completed. The model suggested that the increase in NO3- loading from the forest would cause an increase in abundance of phytoplankton (Chl.a concentration) in are stricted area of the lake.(4) Other results relating to the response-prediction model· Effects of soil-scarification on early vegetation establishment: At the scarification site, light intensity showed a negative effect on the demography of tall-tree species, such as Abiessachalinensis.· Reconstruction of the past environment: From the densitometric analyses the past summer temperature and precipitation in the northern Hokkaido were reconstructed back to A.D. 1651. It was suggested that the Uryu-dam (or, Lake Shumarinai) construction did not affect themicro-meteorological condition in the watershed. Pollen and biogenic silicate analyses have elucidated regional and local climatic and vegetation changes for more than 7000 years (Kawano et al. 2007). The long-term climate change is not only useful for validating the response-prediction model, but it is also used in the questionnaire to the examinees as environmental information.· Japan-Wide Stream Monitoring: This survey is practically the first comprehensive survey on the stream chemistry in Japan(Konohira et al. 2006). Spatial distributions of ionic composition in Japanese natural streams (1278 streams in total) were obtained. Atmospheric nitrogen deposition, annual precipitation, annual air temperature, slope of catchment area and direction of the slope contributed to the stream NO3-concentration. The most effective factor was the atmospheric deposition (Shindo et al.2005). On the other hand, dissolved inorganic phosphorus concentration in natural streams seemed to be controlled by the geology of the catchments(Wakamatsu et al. 2006).· Microbial characteristics of Lake Shumarinai: Bacterial biomass (6.83x107 cells ml-1)was higher than that in eutrophic lakes, although the cell size was rather small in Lake Shumarinai. Picophytoplankton was also abundant (3.8x104cells ml-1) in the lake. Data set obtained in this survey will be introduced in the biogeochemical model.

II. Social survey group
(1) Survey on people’s interests in a forest-agricultural-aquatic system Questionnaire on people’s interests in a forest-agricultural-aquatic system was conducted to determine ranges of type and scale of virtual impact to the environment. Factor analyses of the questionnaire revealed that people seemed to evaluate environments similarly, with respect to the categories such as direct use value, in directuse values and environmental functions (Matsukawa et al.). Assuming parameters of direct use values (DUV) and indirect use values (IDUV), we can analyze people’s interests in the watershed environment from the viewpoints of environmental values.

(2)Preferences on tree-cutting plans

Tree-cutting for conservation of forest environment and for preventing global warming were approved more (>90%) than that for enlargement of national wood production (ca. 70%). Using the choice experiment(a conjoint analysis), variations in people’s preference on plans of forest loggings were surveyed. Plantation after logging was preferred more than strength and area of logging. Farmers tended to prefer larger logging at adjacent areas. Farmer’s preferences on tree-cutting plans might be relating to their perception of the surrounding forest environment.

(3) Scenario questionnaire

Five environmental qualities (forest landscape, amount and diversity of plant species, recreational use in the forest environment,turbidity of water, and deterioration of water quality in river and lake) were selected as a result of the analysis of keywords expressing images on forest,river and lake environments collected in the questionnaire on people’s interests in a forest-agricultural-aquatic system. Environmental changes in these five environmental qualities caused by artificial impact(tree-cutting) scenarios to the forested watershed were estimated using the response-prediction model applied in the project and observational data. Choice experiment was conducted to determine the importance of these environmental qualities to the people’s value judgment of plans. Among environmental changes caused by tree-cutting plans in the forested watershed, the deterioration of water quality in river and lake was the most disreputable one(Fig. 4). Although local residents in Horokanai town also firstly minded the water quality, they showed a significant concern with the occurrence of turbid water. Inter view survey at the town suggested that their value judgments on environmental changes would be related with the past experience on the severe tree cutting at the national forest in the town.

(4) Scenario workshop(SW)

In Horokanai town, a scenario workshop has been conducted in July 2007. Based on selected future scenarios about Horokanai town and surrounding environments, residents discussed on their future society. Research members acted as interpreters of scenario and environmental changes expected in scenarios. Although bilateral communication between residents and researchers was not yet enough, researchers could facilitate the people’s discussion.Finally, residents have planned some future visions, including opportunities developments on recreational uses and environmental education there.

(5) Other results relating to the social survey Conceptual consideration of the project: The methodology to be developed in the project has been considered from the viewpoint of the system control theory. It was suggested that the system control theory was applicable to the systematic environmental education(Fujihira et al. 2008).

○Project Members

Sekino, Tatsuki ( RIHN,Associate Professor,Keyword analysis )

Nakawo, Masayoshi ( RIHN,Professor,Management )

Yoshioka, Takahito ( Kyoto Univ.,Professor,Integration of the response-prediction model and scenario questionnaire )

Ohte, Nobuhito ( Kyoto Univ.,Associate Professor,Hydrological processes )

Ohnishi, Fumihide ( Takenaka Corp.,Environmental capacity evaluation using GIS )

Shibata, Hideaki ( Hokkaido Univ.,Associate Professor,PnET model )

Takahara, Hikaru ( Kyoto Prefectural Univ.,Professor,Pollen analysis )

Zheng, Yuejun ( RIHN,Associate Professor,Environmental consciousness survey )

Koba, Keisuke ( Tokyo Institute of Technology,Instructor,Environmental valuation )

Tokuchi, Naoko ( Kyoto Univ.,Associate Professor,PnET model )

Nakata, Kisaburo ( Tokai Univ.,Professor,Water flow and ecosystem models )

Nagata, Motohiko ( Kyoto Univ.,Associate Professor,Environmental sociology )

Hino, Shuji ( Yamagata Univ.,Associate Professor,Lacustrine material cycling )

Fujihira, Kazutoshi ( Institute of Environmentology,Representative,Application to environmental education )

Yasue, Koh ( Shinshu Univ.,Associate Professor,Annual tree-ring analysis )

Katsuyama, Masanori ( RIHN,Senior Researcher,Liaison )

Matsukawa, Taichi ( RIHN,Researcher,Environmental consciousness survey Keyword analysis )

Hayashi, Naoki ( RIHN,Researcher,Environmental consciousness survey Keyword analysis )

Yoshida, Toshiya ( Hokkaido Univ.,Assistant Professor,Response of land plants to perturbation )

Kuriyama, Kohichi ( Waseda Univ.,Professor,Conjoint analysis )

Tateno, Ryunosuke ( Kagoshima Univ.,Associate Professor,Liaison )

○Future Themes

  Although the scenario questionnaire is a powerful survey to understand the relationship between environmental qualities and people’s environmental consciousness, we recognized difficulties to prepare the scenario questionnaire based on the choice experiment. For future applications of the methodology, a manual of the social survey using environmental scenarios will be published. During the project term, we have recognized the critical importance of the collaboration between natural scientist and social scientist to investigate people’s environmental consciousness. However, it took much time for mutual communication, because of differences in terminology and concepts on researches between them. As project was proceeding, the framework of the project method had been getting clearer.We have to regret that more concrete framework was not established at the beginning of the project term. Various kinds of frameworks of the method for collaborating researches on global environmental issues should be proposed and vigorously argued in the RIHN.

  Social and economic analyses have not been included in the project scope. As pointed out by many colleagues of the RIHN, people’s judgment for environmental measures is affected by the socio-economic valuation as well as scientific environmental valuation. The Environmental Valuation Project will be expanded to such areas in the new project conducted by the Field Science Education and Research Center (FSERC),Kyoto University, for which core members engaged in the Environmental Valuation Project are working. Fortunately, the project has been accepted as a cooperative study of the MEXT in December 2008. The project will be implemented in the Niyodo River (Kochi) and the Yura River (Kyoto) systems. Results and experiences obtained in the environmental valuation project of the RIHN will be very useful for the new research project. The project will be endorsed in the network on region study and environmental sciences led by the RIHN.

Editing

【Senior/Supervisory Editorships】

Yoshioka, T. (ed.)(Environmental Consciousness Project, RIHN (supervisor)) 2009,11 Method to examine environmental consciousness. Keiso Shobo, Bunkyo-ku Tokyo, 208pp.

Papers

【Original Articles】

Fukushima, K. and Tokuchi, N. 2009 Factors controlling the acid-neutralizing capacity in Japanese cedar forest watersheds of various stand ages and topographic characteristics. Hydrological Processes 23:259.

Fukushima, K., Tokuchi, N., Tateno, R. and Katsuyama, M. 2009 Water yield and nitrogen loss during regrowth of Japanese cedar forests after clearcutting. M. Taniguchi, Y. Fukushima, W.C. Burnett, M. Haigh and Y. Umezawa (ed.) Headwaters to the Ocean: Hydrological Change and Watershed Management. aylor & Francis, pp.97-104.

Katsuyama, M., Fukushima, K. and Tokuchi, N. 2009 Effects of various rainfall-runoff characteristics on streamwater stable isotope variations in forested headwaters. M. Taniguchi, Y. Fukushima, W.C. Burnett, M. Haigh and Y. Umezawa (ed.) Headwaters to the Ocean: Hydrological Change and Watershed Management. Taylor & Francis, pp.51-55.

Katsuyama, M., Shibata, H., Yoshioka, T., Yoshida, T., Ogawa, A. and Ohte, N. 2009 Applications of a hydro-biogeochemical model and long-term simulations of the effects of logging in forested watersheds. Sustainability Science 4:179-188. DOI:10.1007/s11625-009-0079-z

Tokuchi, N., Fukushima, K. and Katsuyama, M. 2009 Factors controlling stream water chemistry in ten small forested watersheds with plantation forests of various proportions and ages in central Japan. M. Taniguchi, Y. Fukushima, W.C. Burnett, M. Haigh and Y. Umezawa (ed.) Headwaters to the Ocean: Hydrological Change and Watershed Management. Taylor & Francis, pp.75-81.

Yoshida, T. and Noguchi, M. 2009 Vulnerability to strong winds for major tree species in a northern Japanese mixed forest: analyses of historical data. Ecological Research. in press

Tokuchi, N. and Fukushima, K. 2009 Long-term influence of stream water chemistry in Japanese cedar plantation after clear-cutting using the forest rotation in central Japan. Forest Ecology and Management 257:1768-1775.

Aoyama, K., Yoshida, T., and Kamitani, T. 2009 An alternative of soil scarification treatment for forest restoration: effects of soil returning. Journal of Forest Research.

Katsuyama, M., Fukushima, K. and Tokuchi, N. 2008 Comparison of rainfall runoff characteristics in forested catchments underlain by granitic and Sedimentary rock with various forest age. Hydrological Research Letters 2:14-17.

Takano, K., Ishikawa, Y., Mikami, H., Igarashi, S., Hino, S. and Yoshioka, T. 2008 Fungal infection for cyanobacterium Anabaena smithii by two chytrids in eutrophic region of large reservoir Lake Shumarinai, Hokkaido, Japan. Limnology 9:213-218.

Christopher, S.F., Shibata, H., Ozawa, M., Nakagawa, Y. and Mitchell, M.J. 2008 The effect of soil freezing on N cycling: Comparison of two headwater subcatchments with different vegetation and snowpack conditions in the northern Hokkaido Island of Japan. Biogeochemistry 88(1):15-30.

Fujimaki, R. and Tateno, R. 2007 Tokuchi, N. Root development across a chronosequence in a Japanese cedar (Cryptomeria japonica D. Don) plantation. Journal of Forest Research 12:96-102..

Kawano, T., Takahara, H., Nomura, T., Shibata, H., Uemura, S., Sasaki, N. and Yoshioka, T. 2007 Holocene phytolith record at Picea glehnii stands on the Dorokawa Mire in northern Hokkaido, Japan. The Quaternary Research 46:413-426.

Xu X. and Shibata H. 2007 Landscape patterns of overstory litterfall and related nutrient fluxes in a cool-temperate forest watershed in northern Hokkaido, Japan. Journal of Forestry Research 18:249-254.

Koshikawa, K.M., Takamatsu, T., Nohara, S., Shibata, H., Xu, X., Yoh, M., Watanabe, M. and Satake, K. 2007 Speciation of aluminium in circumneutral Japanese stream waters. Applied Geochemistry 22:1209-1216.

Noguchi, M. and Yoshida, T. 2007 Regeneration responses influenced by single tree selection harvesting in a mixed-species tree community in northern Japan. Canadian Journal of Forest Research 37:1554-1562.

Yasue, K. 2006 Seasonal changes in radial growth of ring-porous Japanese ash in northern Hokkaido. Abstracts of 7th International Conference on Dendrochronology:147.

Yoshida, T., Noguchi, M., Akibayashi, Y., Noda, M., Kadomatsu, M. and Sasa, K. 2006 Twenty years of community dynamics in a mixed conifer-broad-leaved forest under a selection system in northern Japan. Canadian Journal of Forest Research 36:1363-1375.

Nagai, M. and Yoshida, T. 2006 Variation in understory structure and plant species diversity influenced by silvicultural treatments among 21–to 26-year-old Picea glehnii plantations. Journal of Forest Research 11 :1-10.

Ogawa, A., Shibata, H., Suzuki, K., Mitchell, M. J. and Ikegami, Y. 2006 Relationship of topography to surface water chemistry with particular focus on nitrogen and organic carbon solutes within a forested watershed in Hokkaido, Japan. Hydrological Processes 20:251-265.

Ohte N., Tokuchi N. and Hobara S. 2006 Impacts of forest defoliation by pine wilt diseases on biogeochemical cycling and streamwater chemistry in a headwater catchment in central Japan. Advances in Geosciences 4:137-142.

Fukuzawa, K., Shibata, H., Takagi, K., Nomura, M., Kurima, N., Fukazawa, T., Satoh, F. and Sasa, K. 2006 Effects of clear-cutting on nitrogen leaching and fine root dynamics in a cool-temperate forested watershed in northern Japan. Forest Ecology and Management 225:257-261.

Sekino, T. and Yoshioka, T. 2005 Diagrammatic representation of environmental monitoring data. Korean Journal of Limnology 38:76-83.

Yasue, K., Kujansuu, J., Kajimoto, T., Nakai, Y., Abaimov, A. P., and Matsuura, Y. 2005 Two years observation on seasonal changes in radial growth of Larix gmeliniiin central Siberia. Abstracts of 7th Pacific Regional Wood Anatomy Conference:125-126.

Yoshida, T., Iga, Y., Ozawa, M., Noguchi, M. and Shibata, H. 2005 Factors influencing early vegetation establishment following soil scarification in a mixed forest in northern Japan. Canadian Journal of Forest Research 35:175-188.

Shibata, H., Kuboi, T., Konohira, E., Satoh, F. and Sasa, K. 2005 Retention processes of anthropogenic nitrogen deposition in a forest watershed in northern Japan. Zhu, Z., Minami, K. and Xing, G. (ed.) Proceedings of the 3rd international nitrogen conference. Science Press USA Inc., Beijing, pp.626-630.

Resco de Dios, V., Yoshida, T. and Iga, Y. 2005 Effects of topsoil removal by soil-scarification on regeneration dynamics of mixed forests in Hokkaido, Northern Japan. Forest Ecology and Management 215:138-148.

Noguchi, M. and Yoshida, T. 2005 Factors influencing the distribution of two co-occurring dwarf bamboo species (Sasa kurilensis and Sasa senanensis) in a conifer-broadleaved mixed stand in northern Hokkaido. Ecological Research 20:25-30.

Konohira, E. and Yoshioka, T. 2005 Dissolved organic carbon and nitrate concentrations in streams: a useful index indicating carbon and nitrogen availability in catchments. Ecological Research 20:359-365.

Tokuchi, N., Ohte, N., Hobara, S., Kim, S. and Katsuyama, M. 2004 Changes in biogeochemical cycling following forest defoliation by pine wilt disease in Kiryu experimental catchment in Japan. Hydrological Processes 18 :2727-2736.

Zheng, Y. 2004 A vision for International Comparative Survey Research. Kwansei Gakuin University (ed.) Proceeding of the Use of Cross-National Comparative Surveys. pp.123-138.

Zheng, Y. 2004 Cross-national Comparison on National Characters of Chinese, Japanese and Korean based on Survey Data. Proc. of China-Japan Symposium on Statistics 8 :394-399.

Shibata, H., Sugawara, O., Toyoshima, H., Wondzell, S. M., Nakamura, F., Kasahara, T., Swanson, F. J. and Sasa, K. 2004 Nitrogen dynamics in the hyporheic zone of a forested stream during a small storm, Hokkaido, Japan. Biogeochemistry 69:83-104.

Noguchi, M. and Yoshida, T. 2004 Tree regeneration in partially cut conifer-hardwood mixed forests in northern Japan: roles of establishment substrate and dwarf bamboo. Forest Ecology and Management 190 :335-344.

Guo, Z., Xiao, X., Gan, Y. and Zheng, Y. 2003 Landscape Planning for A Rural Ecosystem: Case Study of A Resettlement Area for Residents from Land Submerged by the Three Gorges Reservoir. Landscape Ecology 18:503-512.

Research Presentations

【Oral Presentation】

Katsuyama, M., Fukushima, K. and Tokuchi, N. Effects of various rainfall-runoff characteristics on streamwater stable isotope variations in forested headwaters. HydroChange 2008, October 2008, Kyoto, Japan.

Yoshioka, T. Environmental Consciousness, Inner and Outer. The Futurability of Islands: Beyond Endemism and Vulnerability. The 3rd RIHN International Symposium, October 2008, Kyoto, Japan.

Yoshioka, T. Linkages in forested watershed environments. Adaptive Management of Biodiversity in the International Conference on Sustainability on Food, Energy and Industry 2008 (ICSA2008), International Council of Sustainable Agriculture (ICSA), July 2008, Sapporo, Japan.

Zheng, Y. Comparability and Equivalence in Cross-cultural Survey. International Conference on Survey Methods in Multinational, Multiregional, and Multicultural Contexts, June 2008, Berlin, Germany.

Shibata, H. Land Use Dynamics and Terrestrial Ecosystrem Processes. Dynamics and Pathways of Land Systems Change, Pre G8 Summit Symposium, June 2008, Sapporo, Japan.

Shibata, H. Changes and response of ecosystem functions to the anthropogenic disturbances in a natural forest basin of northern Japan. 1st China-Japan Science Forum on Environmental Changes, Bio-resources, and Global Warming, March 2008, Beijing, China.

Hishi, T., Fujimaki, R., Tateno, R., Fukushima, K., Tokuchi, N. Chronological changes of a fine root cluster in anatomy,morphology and mycorrhizal infection in Cryptomeria japonica plantations. 4th International symposium on physiological processes in roots of woody plants, September 2007, Bangor, UK.

Kawano, T., Nomura, T., Takahara, H., Shibata, H., Uemura, S., Sasaki, N. and Yoshioka, T. Holocene dynamics of spruce-hardwood mosaic stands and open swamp vegetation on the Dorokawa mire, northern Hokkaido, Japan based on phytolith and pollen analyses. 17th INQUA Congress, August 2007, Cairns, Australia.

Ohnishi F. Reation of Human-Nature System Model based on Watershed by using GIS. ICEB2006, November 2006, Tsukuba, Japan.

Tobari, Y., Koba, K., Fukushima, K., Tokuchi, N., Shibata, S., Yoshida, S., Hayakasu, S., Tateno, R., Ohte, N., Suzuki, N., Toyoda, S. and Yoshida, N. Research on transition of nitrogen circulation by human activity, using nitrate isotope ratio. Third International Symposium on Isotopomers, August 2006, La Jolla, California, USA.

Kawano, T., Nomura, T., Takahara, H., Kitagawa, H., Shibata, H., Uemura, S., Sasaki, N. and Yoshioka, T. Holocene dynamics of peatland vegetation on Dorokawa bog, Uryu Experimental Forest of Hokkaido University, Japan based on phytolith record. 2nd EAFES International Congress, March 2006, Niigata, Japan.

Nomura, T., Kawano, T., Takahara, H., Kitagawa, H., Shibata, H., Uemura, S., Sasaki, N. and Yoshioka, T. Holocene dynamics of spruce-bload leaved stands on Dorokawa bog, Uryu Experimental Forest of Hokkaido University, Japan, based on pollen record. 2nd EAFES International Congress, March 2006, Niigata, Japan.

Ohnishi F. Fundamental Study on Creation of “Human-Nature System Model (HNSM)”in Japan from the Point of View of River Basin by Using GIS,-To Aim for Regeneration of Relationship between Human and Nature in City Areas, River Basin and Spaceship Earth -. The 11th Japan-US Workshop on Global Change, October 2005, FRCGC, Yokohama.

Tobari, Y., K. Koba, Y.Fukushima, N. Tokuchi, R. Tateno, N. Ohte, N. Suzuki, S. Toyoda, N. Yoshida Nitrate Dynamics in Forest Ecosystems with Various Histories, Using Stable Isotope Measurements. Western Pacific Geophysics Meeting, August 2004, Hawaii.

Ohnishi F. Creation of Human-Nature Model based on Watershed using GIS. ESRI-UC 2006, , San Diego, CA, USA.

Ohnishi F. Creation of “Human-Nature System Model (HNSM)”from the Point of View of River Basin by Using GIS. ICEM2006, , Yamaguchi, Japan.

【Poster Presentation】

Katsuyama, M., Fukushima, K., Tokuchi, N, Ohte, N and Tani, M. Geological influences on hydrological and isotopic characteristics in forested headwaters. GU Fall Meeting, December 2008, San Francisco, USA.

Tokuchi, N., Fukushima, K. and Katsuyama, M. Factors controlling stream water chemistry in ten small forested watersheds with plantation forests of various proportions and ages in central Japan. HydroChange 2008, October 2008, Kyoto, Japan.

Fukushima, K., Tokuchi, N., Tateno, R. and Katsuyama, M. Water yield and nitrogen loss during regrowth of Japanese cedar forests after clearcutting. HydroChange 2008, October 2008, Kyoto, Japan.

Katsuyama, M., Nishimoto, S., Ohte, N. and Tani, M. Relationship between rainfall-runoff processes and mean residence times of stream and groundwater in weathered granite catchments. WPGM2008, July 2008, Cairns, Australia.

Nagata, M. Bridging discourses of ordinary people and experts on environment change. 7th biennial conference of the Asian Association of Social Psychology, July 2007, Kota Kinabalu, Malaysia.

Katsuyama, M., Ohte, N. and Kabeya, N. Disagreement of end-members and geographic sources of streamwater: riparian control mechanism. AGU Fall Meeting, December 2006, San Francisco, USA.

Katsuyama, M., Fukushima, K. and Tokuchi, N. Influence of Geology on Water Yielding Function in Forest Catchments. RIHN (Research Institute for Humanity & Nature) 1st International Symposium "Water and Better Human Life in the Future", November 2006, Kyoto International Conference Hall Annex Hall, Kyoto, Japan.

Ohnishi F. Approach to Enlightenment of Watersheds by the Environmental Event of the Water System. RIHN 1st Internationak Symposium “Water and better human life in the future”, November 2006, Kyoto, Japan.

Matsukawa, T. and T. Yoshioka Effect of childhood nature experience on environmental concerns about watershed. RIHN 1st Internationak Symposium “Water and better human life in the future”, November 2006, Kyoto, Japan.

Katsuyama, M., Ohte, N., Kosugi, K., Katsura, S. and Uenoyama, M. Hydrochemical and hydrological dynamics of bedrock groundwaters in a weathered granite headwater. AGU Fall Meeting, December 2005, San Francisco, USA.

Katsuyama, M., Ohte, N., Kosugi, K. and Tani, M. Hydrochemical and hydrological dynamics of bedrock groundwaters in a weathered granite headwater - A process study in Kiryu Experimental Watershed, Japan. SLope InterComparison Experiment (SLICE) Workshop, September 2005, Oregon, USA.

Ohnishi F. Map Gallery for the Interactions between Humans and Nature in Japan Using GIS. ESRI-UC 2007, , San Diego, USA.