A Meta-Analysis Of Resource Pulse-Consumer Interactions
A Meta-Analysis Of Resource Pulse-Consumer Interactions
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DOI：
10.1890/08-1996.1
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发表时间：
2010-02
影响因子：
6.1
通讯作者：
Louie H. Yang;K. Edwards;Jarrett E. K. Byrnes;J. Bastow;Amber N. Wright;K. Spence
中科院分区：
文献类型：
--
作者：
Louie H. Yang;K. Edwards;Jarrett E. K. Byrnes;J. Bastow;Amber N. Wright;K. Spence
资源脉冲是资源可用性增加的罕见、大幅度和短持续时间的事件。它们包括广泛生态系统中的一系列不同的极端事件，但在自然界脉冲资源现象的多样性中确定一般模式仍然是一个重要的挑战。在这里，我们提出了一个元分析的资源脉冲消费者的相互作用，解决了四个关键问题：（1）脉冲资源的哪些特征最能预测其对消费者的影响？(2)消费者的哪些特征最能预测他们对资源脉冲的反应？(3)资源脉冲的影响在不同的生态系统中有何不同？(4)资源脉冲在社区中的间接影响是什么？为了研究这些问题，我们建立了一个数据集的不同脉冲资源消费者的互动来自世界各地，开发指标来比较不同系统的资源脉冲的影响，并进行多层次回归分析，以检查的方式，其中资源脉冲消费者的互动的特点的变化影响消费者的反应的重要方面。资源脉冲幅度，资源营养水平，资源脉冲持续时间，生态系统类型和亚型，消费者的反应机制，和消费者的身体质量被认为是关键的解释因素预测消费者的反应的幅度，持续时间和时间。较大的消费者表现出更持久的资源脉冲的反应，生殖反应比聚集反应更持久。水生系统显示较短的时间滞后之间的高峰期的资源供应和消费者的反应相比，陆地系统，和时间滞后也较短的较小的消费者相比，较大的消费者。消费者的反应相对于他们的资源脉冲的幅度一般较小的直接消费者的主要资源脉冲，相比消费者在更大的营养距离从最初的资源脉冲。在特定的系统中，这一数据集显示了减弱和放大的间接效应。我们认为这些模式背后的机械过程及其对资源脉冲生态学的影响。
Resource pulses are infrequent, large-magnitude, and short-duration events of increased resource availability. They include a diverse set of extreme events in a wide range of ecosystems, but identifying general patterns among the diversity of pulsed resource phenomena in nature remains an important challenge. Here we present a meta-analysis of resource pulse-consumer interactions that addresses four key questions: (1) Which characteristics of pulsed resources best predict their effects on consumers? (2) Which characteristics of consumers best predict their responses to resource pulses? (3) How do the effects of resource pulses differ in different ecosystems? (4) What are the indirect effects of resource pulses in communities? To investigate these questions, we built a data set of diverse pulsed resource-consumer interactions from around the world, developed metrics to compare the effects of resource pulses across disparate systems, and conducted multilevel regression analyses to examine the manner in which variation in the characteristics of resource pulse- consumer interactions affects important aspects of consumer responses. Resource pulse magnitude, resource trophic level, resource pulse duration, ecosystem type and subtype, consumer response mechanisms, and consumer body mass were found to be key explanatory factors predicting the magnitude, duration, and timing of consumer responses. Larger consumers showed more persistent responses to resource pulses, and reproductive responses were more persistent than aggregative responses. Aquatic systems showed shorter temporal lags between peaks of resource availability and consumer response compared to terrestrial systems, and temporal lags were also shorter for smaller consumers compared to larger consumers. The magnitude of consumer responses relative to their resource pulses was generally smaller for the direct consumers of primary resource pulses, compared to consumers at greater trophic distances from the initial resource pulse. In specific systems, this data set showed both attenuating and amplifying indirect effects. We consider the mechanistic processes behind these patterns and their implications for the ecology of resource pulses.