気候変動に伴う河川生態系のリスク評価：統計モデルとメソコスム実験の融合

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Data collected over the three first years of the project was used to investigate the role of temporal and spatial scale in driving relationships between stream temperatures and environmental and landscape predictors. These results were then applied to examine the role of spring-fed streams supported by volcanic geology as cold refugia for invertebrate and fish species under contemporary and future conditions.Two papers were prepared and submitted to international peer review journals from this work during the year. This work was presented at the annual meeting of the Ecology and Civil Engineering Society.Results from the experiment conducted at the Hokkaido University Tomakomai Experimental Forest during 2020 were published in the international, peer-reviewed journal Global Change Biology (impact factor 13.21). This research, conducted in collaboration with researchers from Trinity College (Ireland), showed that effects of heatwaves on stream algae and invertebrates are dependent on the presence of predators (fish). These results highlight the potential role of species extinctions in amplifying the ecological impacts of climate change.Two more collaborative papers lead by the Institute of Hydrobiology of the Chinese Academy of Sciences were published this year: an experiment to test the effects of warming and nutrient pollution on trophic interactions of freshwater zooplankton (Global Change Biology, IF 13.21); and (2) a meta-analysis of the effectiveness of ecosystem restoration projects in central China (Water Research, IF 13.4).