2022 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
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| Research Institution | Hokkaido University |
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Principal Investigator |
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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| 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, 主査 (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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| Project Period (FY) |
2019-04-01 – 2024-03-31
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| 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 |
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| Outline of Annual Research Achievements |
Planned visits of the monitoring sites for maintenance and data collection were conducted and the remaining FY2021 biological samples processed. Results from the year were presented at the 70th annual meeting of the Ecological Society of Japan.
A methodological protocol was developed for real-time temperature monitoring in rivers (submitted as a method paper). We also participated in work related to a field experiment examining combined effects of climate warming, herbicides, and eutrophication on aquatic food webs (submitted as a research paper).
Results from FY2021 were published in three international journals (Sci. Rep., Impact Factor 4.6; Ecol. Monogr., IF 6.1; Landsc. Ecol. Eng., IF 2). These papers provide novel insights onto the relationships between thermal habitats and the distribution and composition of aquatic species, in particular, the role of volcanic geology in supporting cold stable thermal regimes that host distinctive communities with larger proportions of cold-adapted species. Model projections showed that volcanic streams represent important features for conservation and management as they are more resilient to future climate change than non-volcanic streams (climate refugia).
Finally, an international collaborative paper was also published (Environ. Pollut; IF 8.9) reporting on a meta-analysis of aquatic ecosystem recovery rates after restoration highlighting the value of investing in long-term aquatic ecosystem monitoring and the need to consider multiple biotic and abiotic metrics when assessing ecosystem restoration success.
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| 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 continued to condition planned field work during this year, requiring some adjustments to the original schedule, the general objectives set by the project for the year were met.
Monitored catchments were visited for site maintenance and retrieval of water and air temperature data collected over the year, and the project databases were updated accordingly. The processing of the remaining (FY2021) biological samples (taxonomic identification of benthic invertebrates) was also completed.
Mesocosm experiments were conducted with project partners to investigate the effects of warming/heatwaves, nutrient, and herbicide pollution on aquatic biodiversity.
Results were disseminated as planned through national and international conferences as well as the publication of four papers in international peer-review journals.
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| Strategy for Future Research Activity |
FY2023 will be the last year of the project and consequently we will focus on finalizing ongoing analysis of the data collected over the entire project, dissemination of results and submission of papers for publication. We will continue to complement our work with ongoing collaborations with our national and international partners.
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