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arXiv 1004.4138q-bio.PE
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大小结构种群的食物网〈动〉<动>框架

Food web framework for size-structured populations

Martin Hartvig, Ken H. Andersen, Jan E. Beyer

摘要:

我们综合传统的非结构化食物网,异速生长的身体大小缩放,基于特征的建模,生理结构化建模,提供一个新的和生态相关的工具大小结构化的食物网。该框架允许食物网〈动〉<动>模型,包括个体发育生长和生活史杂食动物在个人水平上解决每个物种的人口结构作为一个大小谱。每个物种的特征是“成熟时的大小”,所有模型参数都是通过与个体大小和成熟时的大小进行缩放而使物种独立的。参数值是确定从跨物种分析的鱼类群落的生活史杂食性是广泛的水生系统,但可能会reparameterised为其他系统。一个合奏的食物网的产生和由此产生的社区进行了分析,在四个层次的组织:社区水平,物种水平,性状水平和个人水平。该模型可以通过假设社区频谱遵循幂律来解析地求解。该解析解提供了一个复杂食物网〈动〉<动>模拟结果的基线预期,并同意与1)生物量分布作为个体大小的函数,2)生物量分布作为成熟时大小的函数,和3)捕食者-猎物之间的关系?完整的模型还预测了多样性分布作为成熟时大小的函数。

英文摘要:

We synthesise traditional unstructured food webs, allometric body size scaling, trait-based modelling, and physiologically structured modelling to provide a novel and ecologically relevant tool for size-structured food webs. The framework allows food web models to include ontogenetic growth and life-history omnivory at the individual level by resolving the population structure of each species as a size-spectrum. Each species is characterised by the trait 'size at maturation', and all model parameters are made species independent through scaling with individual body size and size at maturation. Parameter values are determined from cross-species analysis of fish communities as life-history omnivory is widespread in aquatic systems, but may be reparameterised for other systems. An ensemble of food webs is generated and the resulting communities are analysed at four levels of organisation: community level, species level, trait level, and individual level. The model may be solved analytically by assuming that the community spectrum follows a power law. The analytical solution provides a baseline expectation of the results of complex food web simulations, and agrees well with the predictions of the full model on 1) biomass distribution as a function of individual size, 2) biomass distribution as a function of size at maturation, and 3) relation between predator-prey mass ratio of preferred and eaten food. The full model additionally predicts the diversity distribution as a function of size at maturation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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