1997 Fiscal Year Final Research Report Summary
A study on the changes of water environments and distributions of submerged macrophytes and charophytes in some major lakes, Japan
| Project/Area Number |
08680593
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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 |
環境影響評価(含放射線生物学)
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| Research Institution | LAKE BIWA RESEARCH INSTITUTE |
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Principal Investigator |
HAMABATA Etsuji LAKE BIWA RESEARCH INSTITUTE,SENIOR RESEARCHER, その他部局等, その他 (40238077)
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| Co-Investigator(Kenkyū-buntansha) |
OMOTE Juich SOKA UNIVERSITY,FACULTY OF ENGINEERING,PROFESSOR, 工学部, 教授 (40214225)
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| Project Period (FY) |
1996 – 1997
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| Keywords | LAKE / EUTROPHICATION / CHAROPHYTE / SUBMERGED MACROPHYTE / DISTRIBUTION / INDICATOR SPECIES |
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| Research Abstract |
1.The distributins of submerged macrophytes and charophytes were surveyed in Lake Toro, L.Kusharo, L.Shikotsu (Hokkaido), L.Ogawara (Aomori), L.Towada (Aomori & Akita), L.Ashinoko (Kanagawa), L.Biwa (Shiga) and Unagi-ike Pond (Kagoshima), Japan.
2.The Charophyta-flora were round restrictive in relation to the water qality and sediment of lakes.
3.Carring out the phytosociological survey in precisely in L.Ogawara, 21 sepcies were found. Some species of them were threatened ones as Potamogeton paormitanus, P.pectinatus, Ruppia maritima, Najas yezoensis, Ranunclus kadzusensis. Aplying princial component analysis, the first axis was respectively iterpreted to represent hypothetical species able to grow in a polluted habitat.
4.Potamogeton leptocephalus could not be found agin in Unagi-ike Pond.
5.Chara braunii, C.Globularis v.globularis and Nitella fexilis v.flexilis were generally deistributed in lakes of Hokkaido.
6.Chara gloularis v.globularis and Nitella flexilis v.flexilis were found in L.Towada.
7.In L.Biwa, chara zone composed of Nitella flexilis v.flexilis was found only at offshore of Makino-cho town.
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