2021 Fiscal Year Annual Research Report
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
| Project/Area Number |
19H04314
|
|---|
| Research Institution | Hokkaido University |
|---|
Principal Investigator |
G・MOLINOS JORGE 北海道大学, 北極域研究センター, 准教授 (30767281)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
石山 信雄 地方独立行政法人北海道立総合研究機構, 森林研究本部 林業試験場, 研究主任 (50780821)
末吉 正尚 国立研究開発法人土木研究所, 土木研究所(つくば中央研究所), 専門研究員 (70792927)
|
|---|
| Project Period (FY) |
2019-04-01 – 2024-03-31
|
| Keywords | 気候変動 / 河川生態系 / 水温予測 / 種間関係 / メソコスム実験 |
|---|
| Outline of Annual Research Achievements |
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).
|
| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
Despite COVID-19 restrictions have conditioned the development of the project activities and field work during the last two years, requiring adjustments to the original schedule, the objectives have been met successfully.
Monitored catchments were visited for site maintenance and collection of physical (water and air temperature) and biological (fish/benthic invertebrate and algae) sampling. All the planned biological sampling was completed.
Statistical models for prediction of water temperatures were updated with the newly collected data.
Visit to the Hiji River (Ehime, Shikoku), which was not possible during FY2020 due to COVID-19 restrictions, was conducted this year. Unfortunately, a high proportion of the monitored sites were lost because of typhoons and heavy rainfall that affected the area during the two previous years. Therefore, we decided to use the recovered data but otherwise discontinue work in this catchment. This does not affect the development or deliverables of the project, which continues operating as planned on the other three study catchments.
|
| Strategy for Future Research Activity |
FY2022 will carry on with the collection of temperature data and processing of the biological samples collected during FY2021 (taxonomic identification of macroinvertebrates). Analysis will build on results from previous years with a focus on assessing relationships between thermal habitats in rivers and the distribution and composition of aquatic species. Results will be disseminated through presentations at conferences and publications. We will continue to complement our work with ongoing collaborations with our international partners.
|
| Remarks |
Hokkaido University press release
|
