2017 Fiscal Year Final Research Report
FAUNAL CHARACTERISTICS OF THE ENDANGERED PROFUNDAL OLIGOCHAETE ASSEMBLAGES IN OLIGOTROPHIC LAKES IN JAPAN
| Project/Area Number |
15K07178
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Biodiversity/Systematics
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| Research Institution | Hirosaki University |
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Principal Investigator |
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| Research Collaborator |
TORII Takaaki 株式会社いであ, 環境創造研究所, 主査研究員
Martin Patrick Royal Belgian Institute of Natural Sciences, Researcher
Timm Tarmo Estonian University of Life Sciences, Professor
Erséus Crister University of Gothenburg, Professor
Fend Steve United States Geological Survey
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Keywords | 水生貧毛類 / 貧栄養湖 / 分類 / 生物多様性 |
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| Outline of Final Research Achievements |
Oligochaete composition was studied in the profundal bottoms of several oligotrophic lakes in northern Japan. The composition was different from each other, and many representatives were thought to be stenotherm and oxyphilic, and primarily subterranean species. Recent faunal changes were detected in Lake Kuttara in Hokkaido and Lake Inawashiro in Fukushima Prefecture, probably due to recent changes in water chemistries by anthropogenic eutrophication and neutralization, respectively. Two lumbriculid and 3 naidid species were collected in the spring flowing into Lake Tazawa in Akita Prefecture. Two of which are undescribed and thought to be subterranean species. It is suggested that rich and unique oligochaete assemblages had been found in the profundal Lake Tazawa before zoobenthos extinction caused by the artificial acidification in 1940s.
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| Free Research Field |
動物分類学
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