NALYTICAL STUDY ON FOODWEB OF COASTAL ECOSYSTEM OF LAKE : CONNECTION BETWEEN PLANKTONIC AND BENTHIC FOOD CHAINS

我们调查了整个湖泊的食物网，这是拉姆萨尔网站之一，使用碳和氮稳定同位素分析，从而贡献的中上层和底栖猎物的高营养地位的动物（鱼类消费者）和中上层和底栖食物链之间的连接在食物网。在Izunuma湖，食物网的主要生产者是浮游植物（中上层食物链）和附着藻类（底栖或文学的食物链），大多数鱼类消费者的浮游植物和附着藻类之间的碳同位素比率居中，表明它们广泛地在中上层和底栖食物链中觅食，从而将中上层和底栖食物链联系起来。

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.