| Session Description |
Aquatic systems have interactions with atmospheric, terrestrial and underground systems through physical, chemical and biological processes. From the aspect of ecohydrology, qualitative and quantitative characteristics of material transfer between the systems are notable subjects as well as those within each system. In case of a river ecosystem, for example, material transfer from terrestrial to the channel, from upper to lower segments through the channel, between reservoir and river, between channel and aquifer, between channel and riparian, and between freshwater and estuary will be critical subjects for description of the whole ecosystem. In order to approach to such intersystem material transfer we often need some tracers for distinction and quantification of the material. Stable isotope is a remarkable device for this purpose since some of them can keep signature of material origin in a conservative manner. It has also an advantage in reflecting transformation history of a molecule, which can be useful for estimation on metabolic activities of any organisms in the field. In the present session we will accept papers on the above subjects in general as well as those on application of stable isotope techniques to other ecohydrological phenomena. In addition, any empirical and theoretical studies on the following topics are also welcome even when the study does not adopt stable isotope techniques: e.g., interactions between terrestrial and aquatic ecosystems, surface water-ground water interactions, water retention time in rivers and wetlands, spiral length of material cycle in river ecosystems, trophic structure of biological communities, origin of organic matter in freshwater and estuary ecosystems, mass balance of nutrient materials in aquatic ecosystems, and on any human impacts on those ecohydrological systems. |
