| 研究課題/領域番号 |
19H04314
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| 研究種目 |
基盤研究(B)
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| 配分区分 | 補助金 |
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| 応募区分 | 一般 |
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| 審査区分 |
小区分64040:自然共生システム関連
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| 研究機関 | 北海道大学 |
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研究代表者 |
G・MOLINOS JORGE 北海道大学, 北極域研究センター, 准教授 (30767281)
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| 研究分担者 |
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 国立研究開発法人国立環境研究所, 生物多様性領域, 研究員 (70792927)
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| 研究期間 (年度) |
2019-04-01 – 2024-03-31
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| 研究課題ステータス |
交付 (2023年度)
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| 配分額 *注記 |
17,160千円 (直接経費: 13,200千円、間接経費: 3,960千円)
2023年度: 3,640千円 (直接経費: 2,800千円、間接経費: 840千円)
2022年度: 4,160千円 (直接経費: 3,200千円、間接経費: 960千円)
2021年度: 2,340千円 (直接経費: 1,800千円、間接経費: 540千円)
2020年度: 2,340千円 (直接経費: 1,800千円、間接経費: 540千円)
2019年度: 4,680千円 (直接経費: 3,600千円、間接経費: 1,080千円)
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| キーワード | 気候変動 / 河川生態系 / 水温予測 / 生態系保全 / 種間関係 / メソコスム実験 |
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| 研究開始時の研究の概要 |
昨今、温暖化の生物多様性への深刻な影響が懸念されている。しかし、信頼度および汎用性の高い水温予測手法は確立されておらず、他の系に比べ淡水生態系での温暖化影響の検証・予測は遅れている。また、既存研究の多くは温暖化の生物への影響を種レベルの観点からしか評価しておらず、種分布や環境の組み合わせが変化する将来において、群集構造や生態系機能がどう変化していくか未知の部分が多い。本研究では、水温モデリング、種分布モデリング、および野外操作実験を統合し、種・群集・生態系と多様なレベルでの温暖化の河川生態系への影響を予測する手法の開発、また本手法を用いた全国スケールで河川生態系の温暖化リスク評価を実施する。
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| 研究実績の概要 |
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).
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| 現在までの達成度 (区分) |
現在までの達成度 (区分)
2: おおむね順調に進展している
理由
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.
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| 今後の研究の推進方策 |
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.
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