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Dissertation Research: The Impact of Predator-Predator Interactions on Prey Population Dynamics

论文研究：捕食者与捕食者相互作用对猎物种群动态的影响

基本信息

批准号：
9521549
负责人：
Robert Denno
金额：
$ 0.45万
依托单位：
University of Maryland, College Park
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
1995
资助国家：
美国
起止时间：
1995-08-15 至 1997-07-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9521549&HistoricalAwards=false
关键词：
Dissertation Research Impact Predator Interactions

项目摘要

9521549 Denno Nearly all predator-prey systems involve predator complexes comprised of multiple predator species. Evidence from several systems demonstrates that the total impact of a predator complex can not be measured by summing the impacts of the individual predators. This suggests that many predators are interacting with each other either synergistically, when predators facilitate each other's performance, or antagonistically, when predators interfere with each other's feeding or foraging. The goal of this research is to quantify and identify the mechanism for the interactions between ground and foliar aphid predators across a wide range of conditions in an alfalfa agroecosystem. Preliminary evidence from this agroecosystem suggests that foliar-foraging predators of aphids interact synergistically with ground-foraging predators of aphids. Evidence from other preliminary studies suggests that the mechanism driving this interaction is aphid dropping behavior induced by foliar predators which makes the aphids more susceptible to ground predators. The results of this project will have broad implications for basic predator-prey theory. In addition, they will foster advances in the use of these predators for the biological control of insect pests.

小行星9521549 几乎所有的捕食者-被捕食者系统都涉及由多个捕食者物种组成的捕食者复合体。来自几个系统的证据表明，捕食者复合体的总影响不能通过将单个捕食者的影响相加来衡量。这表明，许多捕食者相互作用，或者协同，当捕食者促进彼此的表现，或对抗，当捕食者干扰彼此的喂养或觅食。本研究的目的是量化和确定的机制之间的相互作用的地面和叶面蚜虫捕食者在广泛的条件下，在苜蓿农业生态系统。从这个农业生态系统的初步证据表明，蚜虫的叶面觅食捕食者与蚜虫的地面觅食捕食者协同作用。其他初步研究的证据表明，这种相互作用的机制是由叶面捕食者诱导的蚜虫下降行为，使蚜虫更容易受到地面捕食者的影响。该项目的结果将对基本的捕食者-被捕食者理论产生广泛的影响。此外，它们还将促进利用这些捕食者对害虫进行生物控制的进展。