Brett MT, Goldman CR
Division of Environmental Studies, University of California, Davis, CA 95616, USA.
Science. 1997 Jan 17;275(5298):384-6. doi: 10.1126/science.275.5298.384.
Models predict that food-web structure is regulated by both consumers and resources, and the strength of this control is dependent on trophic position and food-web length. To test these hypotheses, a meta-analysis was conducted of 11 fish (consumer)-by-nutrient (resource) factorial plankton community experiments. As predicted, zooplankton biomass was under strong consumer control but was weakly stimulated by nutrient additions; phytoplankton biomass was under strong resource control with moderate control by fish. However, the phytoplankton and zooplankton responses to nutrient additions did not follow theoretical predictions based on the number of trophic levels in the food web.
模型预测，食物网结构受消费者和资源两者的调控，而这种控制的强度取决于营养级位置和食物网长度。为了验证这些假设，对11个鱼类（消费者）-营养物质（资源）因子浮游生物群落实验进行了荟萃分析。正如预测的那样，浮游动物生物量受到消费者的强烈控制，但受营养添加的刺激较弱；浮游植物生物量受到资源的强烈控制，同时也受到鱼类的适度控制。然而，浮游植物和浮游动物对营养添加的反应并不符合基于食物网营养级数量的理论预测。
