Chironomid Fauna in the Emergent Plant Zone of Lake Kasumigaura, Japan.
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概要
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The chironomid fauna was studied in the emergent plant zone of Lake Kasumigaura in May, August and November of 1986. A total of 2, 181 adults were reared and emerged from plant samples and sediments in the emergent plant zone. We identified 1957 specimens belonging to 31 species of 18 genera. Ten species were abundant, of which five were recovered from plant samples, two from sediments and others from both. Species composition did not differ much from May to August, which might have corresponded with the change of in situ larval density. The abundance of the chironomids was highest in May and low in August for plant samples, while it was highest in August for sediments. On plant samples, it correlated with the chlorphyll a amount on the reed stems, which was higher in May than in August. In November, only two species predominated. Species composition differed more markedly among substratum types than among localities in the lake. Some chironomid species seemed to select specific sediments. Chironomid fauna in littoral hydrophyte zones was more diverse than in pelagic zones in Lake Kasumigaura.
- 日本陸水学会の論文
日本陸水学会 | 論文
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