Persistence despite omnivory: benthic communities and the discrepancy between theory and observation
Persistence despite omnivory: benthic communities and the discrepancy between theory and observation
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DOI：
10.1111/j.0030-1299.2006.14217.x
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发表时间：
2006-04-01
期刊：
影响因子：
3.4
通讯作者：
Herman, PMJ
中科院分区：
文献类型：
--
作者：
HilleRisLambers, R;van de Koppel, J;Herman, PMJ
杂食性在自然群落中是无所不在的。然而，大多数理论模型预测杂食性动物应该是罕见的，特别是在高基础生产力。为了解决这种不协调，我们认为作为一个例子，底栖食物网杂食性。我们提出了一个数学分析简单的底栖食物网中的一些机制，促进持久性的杂食性。作为一个模型系统，我们专注于碎屑，细菌和存款馈线，细菌和碎屑饲料之间的相互作用。生物量模式随着基础生产力的增加而变化，触发机制削弱了杂食性相互作用组件之间的相互作用。因此，这些机制扩大了杂食性相互作用持续存在的有机投入率的范围，并防止排斥，促进生产环境中的杂食性相互作用。这些机制可能解释了底栖生物群落中杂食性的高发生率，并揭示了其他群落中杂食性的持久性。
Omnivory is omnipresent in natural communities. However, most theoretical models predict that omnivory should be rare, especially at high basal productivity. To address this incongruity, we consider as an example benthic food webs with omnivory. We present a mathematical analysis of simple benthic food webs in which a number of mechanisms promote persistence of omnivory. As a model system, we focus on the interaction between detritus, bacteria and deposit feeders that feed on both bacteria and detritus. Biomass patterns change with increasing basal productivity, triggering mechanisms that weaken the interactions between components of omnivorous interactions. Consequently, these mechanisms extend the range of organic input rates at which omnivorous interactions persist, and prevent exclusion, promoting omnivorous interactions in productive environments. These mechanisms give potential explanations for the high incidence of omnivory in benthic communities and shed insight on the persistence of omnivory in other communities.