Heterogeneity in body size and habitat complexity influence community structure
Heterogeneity in body size and habitat complexity influence community structure
复制标题
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.
中科院分区:
文献类型:
--
作者:
Carter, Shannon K.;Vodopich, Darrell;Crumrine, Patrick W.
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.
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DOI:
--
发表时间:
2013
期刊:
影响因子:
--
作者:
Benjamin J. Toscano;B. Griffen
通讯作者:
B. Griffen
影响因子:
2.7
作者:
Relyea, RA;Yurewicz, KL
通讯作者:
Yurewicz, KL
影响因子:
4.8
作者:
Rudolf, Volker H. W.
通讯作者:
Rudolf, Volker H. W.
影响因子:
2.9
作者:
J. Ohlberger;Ø. Langangen;N. Stenseth;L. A. Vøllestad
通讯作者:
L. A. Vøllestad
影响因子:
4.8
作者:
Preisser, Evan L.;Orrock, John L.;Schmitz, Oswald J.
通讯作者:
Schmitz, Oswald J.