| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2010: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2009: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2008: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Research Abstract |
We investigated the whole-lake food web in Lake Izunuma, which was one of the Ramsar sites, using carbon and nitrogen stable isotope analysis, and thereby the contributions of pelagic and benthic prey to animals with high trophic position (fish consumers)and the connection between pelagic and benthic food chain in the food web. In Lake Izunuma, the main producers of the food web were phytoplankton (pelagic food chain)and attached algae (benthic or litoral food chain)and most fish consumers had intermediate carbon isotope ratios between phytoplankton and attached algae, indicating they foraged broadly across pelagic and benthic food chains, thereby linking pelagic and benthic food chains.
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