2010 Fiscal Year Final Research Report
Evaluation of effects of global warming and instream structure on freshwater fish in the World Natural Heritage ? Shiretoko, Japan.
| Project/Area Number |
19510017
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Environmental dynamic analysis
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| Research Institution | Meijo University |
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Principal Investigator |
TANIGUCHI Yoshinori Meijo University, 理工学部, 准教授 (30316145)
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| Co-Investigator(Renkei-kenkyūsha) |
KAWAGUCHI Yoichi 徳島大学, 工学部, 准教授 (20391617)
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| Project Period (FY) |
2007 – 2010
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| Keywords | オショロコマ / 河川鬱閉度 / 砂防ダム / 治山ダム / 昇温 / 温暖化 / 個体群密度 / スリット化 / 河畔林 |
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| Research Abstract |
Presence of approximately 200 dams was confirmed in the study streams and Dolly Varden density was lower in high dam-density streams. Because dam density was positively correlated with maximum summer water temperatures, construction of dams caused stream temperature increase and possibly shrunk the thermal habitat of the fish. Also, number of days exceeding water temperature of 22℃ was greater in the high dam-density streams compared to the low-dam density ones.
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