Photosynthetic potential of phytoplankton in the deep water of Lake Baikal, Russia

被引：0

作者：

Motomi Genkai-Kato

Kentaro Nozaki

Pavel P. Sherstyankin

Natalia P. Logacheva

Nina A. Bondarenko

Shuji Hino

Masami Nakanishi

机构：

[1] Kyoto University,Center for Ecological Research

[2] University of Shiga Prefecture,Limnological Laboratory, School of Environmental Science

[3] Limnological Institute of the Siberian Division of the Russian Academy of Sciences,Department of Material and Biological Chemistry, Faculty of Science

[4] Yamagata University,Center for Limnology

[5] Research Institute for Humanity and Nature,School of Human Sciences

[6] University of Wisconsin–Madison,undefined

[7] Sugiyama Jogakuen University,undefined

来源：

Limnology | 2003年 / 4卷

关键词：

Deep water; Light; Photosynthesis; Phytoplankton; Water mixing;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

We examined the photosynthetic activity of the phytoplankton community collected from the surface to a depth of 1000 m in the south basin of Lake Baikal. Experiments were conducted in June (mixing period) and August (stratified period). The carbon fixation rate was measured by the use of a 13C tracer after the incubation of samples under light conditions in the upper water column. Photosynthetic fixation of 13C was detected for samples collected from a depth of 500 m, indicating the viability of phytoplankton in deep water. The community composition was dominated by Bacillariophyceae in deep water. The finding of lower activity at a depth of 200 m than that at a depth of 500 m in August suggests that the spring diatom bloom could be a significant source of viable populations at a depth of 500 m. Photosynthetic activity was not detected in samples collected at a depth of 1000 m.

引用

页码：113 / 117

页数：4