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Spatial changes in carbon and nitrogen stable isotopes of the plankton food web in a saline lake ecosystem |
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| Authors: | Hideyuki Doi Elena I. Zuykova Eisuke Kikuchi Shuichi Shikano Keiichi Kanou Natalia Yurlova Elena Yadrenkina |
| Affiliation: | (1) Graduate School of Life Sciences, Tohoku University, 2-1-1, Katahira, Aoba-ku Sendai, 980-8577, Japan;(2) Institute of Animal Systematics and Ecology, Siberian Branch of Russian Academy Sciences, Frunze Str., 11, Novosibirsk, 630091, Russia;(3) Center for Northeast Asian Studies, Tohoku University, Kawauchi, Aoba-ku Sendai, 980-8576, Japan;(4) LAFWEDY, Faculty of Agriculture, Ehime University, 3-5-7, Tarumi, Matsuyama 790-8566, Ehime, Japan |
| Abstract: | We investigated spatial changes in the isotope ratios of the plankton food web in Lake Chany, Siberia, Russia, especially at an estuarine transition zone of the lake. The δ13C values of particulate organic matter (POM) varied among the sampling sites, and increased with increasing pH of the lake water. This may reflect a shift by phytoplankton from using CO2 to using bicarbonate for photosynthesis with increasing pH. The δ13C values of zooplankton community also changed at each site along with those of the POM. This was indicative of carbon isotope changes of plankton food webs between the stations along an environmental gradient. |
| Keywords: | phytoplankton POM Daphnia estuarine zone spatial scales Lake Chany |
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