DOI: 10.1016/j.tree.2017.06.009
论文题名: Infectious Agents Trigger Trophic Cascades
作者: Buck J.C. ; Ripple W.J.
刊名: Trends in Ecology and Evolution
ISSN: 1695347
出版年: 2017
卷: 32, 期: 9 起始页码: 681
结束页码: 694
语种: 英语
英文关键词: biological control
; consumer strategy
; keystone
; natural enemy
; top-down regulation
; tritrophic
英文摘要: Most demonstrated trophic cascades originate with predators, but infectious agents can also cause top-down indirect effects in ecosystems. Here we synthesize the literature on trophic cascades initiated by infectious agents including parasitoids, pathogens, parasitic castrators, macroparasites, and trophically transmitted parasites. Like predators, infectious agents can cause density-mediated and trait-mediated indirect effects through their direct consumptive and nonconsumptive effects respectively. Unlike most predators, however, infectious agents are not fully and immediately lethal to their victims, so their consumptive effects can also trigger trait-mediated indirect effects. We find that the frequency of trophic cascades reported for different consumer types scales with consumer lethality. Furthermore, we emphasize the value of uniting predator–prey and parasite–host theory under a general consumer–resource framework. Trophic cascades originate with consumers (predators or infectious agents). The frequency of trophic cascades reported for different consumer types scales with consumer lethality. Unlike most predators, infectious agents can consume (i.e., infect) a victim without killing it. This raises the potential for infectious agents to cause consumptive trait-mediated indirect effects, which can be positive or negative. Infectious agents seem less likely than predators to cause consumptive density-mediated indirect effects and nonconsumptive trait-mediated indirect effects, but are uniquely capable of causing consumptive trait-mediated indirect effects. Unification of predator–prey and parasite–host theory under a general consumer–resource framework will benefit both fields. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/66889
Appears in Collections: 全球变化的国际研究计划 气候变化与战略
There are no files associated with this item.
作者单位: Marine Science Institute, University of California Santa Barbara, Santa Barbara, CA, United States; Ecology, Evolution and Marine Biology, University of California Santa Barbara, Santa Barbara, CA, United States; Global Trophic Cascades Program, Department of Forest Ecosystems and Society, Oregon State University, Corvallis, OR, United States
Recommended Citation:
Buck J.C.,Ripple W.J.. Infectious Agents Trigger Trophic Cascades[J]. Trends in Ecology and Evolution,2017-01-01,32(9)