Plankton Community Structure and Limnetic Primary Production
Plankton Community Structure and Limnetic Primary Production
复制标题
浮游生物群落结构和湖沼初级生产
DOI：
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发表时间：
1984
影响因子：
2.9
通讯作者：
J. Kitchell
中科院分区：
文献类型：
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作者：
S. Carpenter;J. Kitchell
本文采用一个机械的、尺度结构的模型来分析放牧动物对湖泊初级生产力的影响。放牧和营养排泄率草食动物的大小，依赖细胞大小的藻类代谢率，相互作用产生强烈的反应，初级生产力。生产力是最大的叶绿素和浮游动物生物量的中间浓度。这种单峰响应与来自水生系统、陆地系统（其基本机制不同）和理论预期的数据一致。湖泊生产力的巨大差异（2至3个数量级）无法用养分供应来解释。食物网相互作用可以调节食草性浮游动物的大小和丰度，独立于营养供应。由此产生的变化，在草食动物的营养循环和浮游植物的大小分布的影响，并可以改变湖泊初级生产力多达两个数量级。
A mechanistic, size-structured model was used to analyze effects of grazers on lacustrine primary productivity. Dependence of grazing and nutrient excretion rates on herbivore size, and dependence of algal metabolic rates on cell size, interacted to produce strong responses in primary productivity. Productivity was maximum at intermediate concentrations of chlorophyll and zooplankton biomass. This unimodal response is consistent with data from aquatic systems, terrestrial systems (where the underlying mechanisms are different), and theoretical expectations. Substantial variability in lake productivity (2 to 3 orders of magnitude) exists that cannot be explained by nutrient supply. Food web interactions can regulate herbivorous zooplankton size and abundance, independent of nutrient supply. The resultant variability in herbivory influences nutrient recycling and the size distribution of the phytoplankton, and can alter lake primary productivity by as much as two orders of magnitude.