Heterogeneity in body size and habitat complexity influence community structure

Heterogeneity in body size and habitat complexity influence community structure
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体型大小和栖息地复杂性的异质性影响群落结构

DOI:
10.1080/02705060.2018.1435429
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发表时间:
2018
影响因子:
1.3
通讯作者:
Crumrine, Patrick W.
Crumrine, Patrick W.
中科院分区:
环境科学与生态学4区
文献类型:
--
作者:
Carter, Shannon K.;Vodopich, Darrell;Crumrine, Patrick W.

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食物网研究通常忽略了种群内的个体差异和环境的变化,并假设这些因素对群落动态相对于种间相互作用的影响微不足道。然而,在人口(大小结构)和栖息地的物理结构(栖息地复杂性)的身体大小的变化都可以影响种间相互作用独立,可能的互动效果。利用实验性围隔生态系统,我们研究了捕食者的大小结构和栖息地的复杂性捕食的两种常见的捕食者在无鱼池塘:幼虫水生甲虫(Cybister fimbriolatus)和幼虫蜻蜓(Anax junius)的影响。同类相食,intraguild捕食,捕食共享的猎物进行了测量,在两个层次的栖息地复杂性与6个大小结构对捕食者。我们发现,高度复杂的栖息地维持较高的猎物密度,因为猎物可以躲避捕食者。此外,大小结构有直接(大小更好地预测捕食率比物种身份)和间接(IGP和同类相食降低捕食率)的影响,消费的相互作用,改变了组成和密度的捕食者公会。确定的大小和栖息地介导的机制可以改变频率的intraguild与interguild捕食(一个重要的平衡,在确定自上而下的控制捕食者),因此,我们认为,这些来源的异质性应包括在社区生态学研究在可能的情况下。
Food web studies commonly ignore individual variation within a population and variation in the environment and assume these factors have insignificant effects on community dynamics relative to interspecific interactions. However, variation in body sizes within a population (size structure) and the physical structure of habitats (habitat complexity) can both affect interspecific interactions independently, with possible interactive effects. Using experimental mesocosms, we examined effects of predator size structure and habitat complexity on predation by two common predators in fishless ponds: larval aquatic beetles (Cybister fimbriolatus)and larval dragonflies (Anax junius). Cannibalism, intraguild predation, and predation on shared prey were measured at two levels of habitat complexity crossed with six size-structured pairs of predators. We found that highly complex habitats sustain a higher prey density because prey can take refuge from predators. Additionally, size structure had direct (size better predicted predation rate than did species identity) and indirect (IGP and cannibalism lowered predation rates) effects on consumptive interactions, which changed the composition and density of the predator guild. The identified size- and habitat-mediated mechanisms can change the frequencies of intraguild vs. interguild predation (a balance important in determining top–down control of predators), and therefore we argue that these sources of heterogeneity should be included in community ecology studies where possible.
捕食者的大小与栖息地结构相互作用,以确定功能反应的异速生长尺度
DOI: --
发表时间: 2013
期刊:
影响因子: --
作者:
Benjamin J. Toscano;B. Griffen
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DOI: 10.1007/s00442-002-0910-z
发表时间: 2002-05-01
期刊: OECOLOGIA
影响因子: 2.7
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Relyea, RA;Yurewicz, KL
通讯作者: Yurewicz, KL
DOI: 10.1111/j.1365-2656.2011.01935.x
发表时间: 2012-05-01
影响因子: 4.8
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Rudolf, Volker H. W.
通讯作者: Rudolf, Volker H. W.
同类相食对社区造成的后果
DOI: --
发表时间: 2012
影响因子: 2.9
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DOI: 10.1890/07-0260.1
发表时间: 2007-11-01
期刊: ECOLOGY
影响因子: 4.8
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Preisser, Evan L.;Orrock, John L.;Schmitz, Oswald J.
通讯作者: Schmitz, Oswald J.