Effects of Multiple Disturbances on Coastal Ecosystems: Does Anthropogenic Stress Affect Resistance to Extreme Weather??

2022 Fiscal Year Final Research Report

• Project/Area Number: 21K20671
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Multi-year Fund
• Review Section: 0703:Biology at organismal to population levels and anthropology, and related fields
• Research Institution: Tohoku University
• Principal Investigator: Iwasaki Aiko 東北大学, 生命科学研究科, 助教 (00826076)
• Project Period (FY): 2021-08-30 – 2023-03-31
• Keywords: 攪乱 / 多重攪乱 / 人間活動 / 養殖 / 異常気象

Outline of Final Research Achievements

This study aimed to evaluate combined effects of anthropogenic stress, chronic high temperature stress and acute high temperature event on coastal ecosystems. Although field experiment was planned, the temperature and water quality were not appropriately regulated. Therefore, the plan was modified to assess the impact of high temperature events between sites with different water quality and temperature history. Survey sites had been selected based on the water quality and fish community data had been obtained there under normal condition as the baseline. We plan to continue the survey in the next year to quantitatively evaluate the combined effects of multiple disturbances.

Free Research Field

個体群生態学、群集生態学

Academic Significance and Societal Importance of the Research Achievements

近年、地球温暖化、気候変動に伴う異常気象イベントの強度や頻度の増加、人間活動に伴う人為的なストレスの増加によって、複数の異なる種類、異なるタイプの攪乱が同時に作用する多重攪乱が世界的に増加している。多重攪乱による生態学的インパクトや帰結の予測の難しさは、攪乱間の相互作用によりその影響が相加的でなく、相乗的、相殺的になる可能性があることにある。本研究の成果は、この多重攪乱の相互作用がどのような種類どのような時間的特徴を持つ攪乱間でどう変化するかを明らかにするものであり、世界中で起こる様々な多重攪乱の予測可能性の向上に大きく貢献することが期待される。