2024-03-29T07:51:59Z
https://soar-ir.repo.nii.ac.jp/oai
oai:soar-ir.repo.nii.ac.jp:00016363
2023-03-09T01:25:58Z
1595:1596:1598:1606
Population dynamics of epiphytic chironomid communities in the aquatic macrophyte zones of eutrophic Lakes Suwa and Kitaura
SAJI, Azumi
NAKAZATO, Ryoji
SAKURAI, Hideaki
SAKUMA, Masataka
HANAZATO, Takayuki
epiphytic chironomid
Lake Suwa
Lake Kitaura
We studied the population dynamics of epriphytic chironomid larvae in the vegetated areas of Lakes Suwa and Kitaura. We quantitatively collected chironomid larvae from samples of the 4 species of angiosperms present in the lakes: the emergent plants phragmites australis (a reed) and Zizani latifolia; the floating plant Nymphoides peltata; and the submerged plant Potamogeton malaianus. Collections were made from all 4 plant zones in Lake Suwa from April 2000 to November 2000 and from the reed zone in Lake Kitaura from April 2000 to March 2001. In both lakes the most abundant chironomid Larvae on the reed stems from late May to September were Chironominae (especially, Dicrotendipes pelochloris and Glyptotendipes tokunagai). On the leaves of submerged and floating plants in Lake Suwa, Orthocladinae larvae (especially, Cricotopus trifasciatus) dominated during the sampling period. On the reed stems in Lake Suwa, mean larval density was 0.4 ind cm⁻² and biomass of epiphytic chironomids was 12.9μgcm⁻²; these values were 23% and 22%, respectively, of those in Lake Kitaura. The differences in chironomid abundance observed in the lakes seemed to be caused by differenes in food availability (i.e., abundance of algae attached to reed stem). The average of diversity index (1/λ,λ:Simpson's index) of chironomid larvae on each plant was 2.7-3.3 on reed and Z.latifolia. 1.8 on N. Peltata and 1.8 on P. malaianus from June to August. The differnces in diversity index may be correlated with the conditions of DO concentration during this period.
Article
信州大学山地水環境教育研究センター研究報告 2: 111-115(2004)
信州大学山地水環境教育研究センター
2004-02-28
eng
departmental bulletin paper
VoR
http://hdl.handle.net/10091/2026
https://soar-ir.repo.nii.ac.jp/records/16363
1348-7612
AA11887942
信州大学山地水環境教育研究センター研究報告
2
111
115
https://soar-ir.repo.nii.ac.jp/record/16363/files/InlandWater02-21.pdf
application/pdf
395.8 kB
2015-09-28