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Dissertation Research: Examining the Effects of Large Scale Migration on Local Population and Community Dynamics in Larval Odonates

论文研究：研究大规模迁徙对幼虫当地种群和群落动态的影响

基本信息

批准号：
0206549
负责人：
Philip Crowley
金额：
$ 0.37万
依托单位：
University of Kentucky Research Foundation
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2002
资助国家：
美国
起止时间：
2002-06-01 至 2003-11-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=0206549&HistoricalAwards=false
关键词：
Dissertation Research Examining Effects Large

项目摘要

Large scale movement patterns can influence the spatio-temporal occurrence ofsize-structure within and between populations but few studies explicitly address howthese patterns affect interactions such as cannibalism and intraguild predation (IGP). Thedragonfly Anax junius is a species that migrates and often assumes the role of top-predator in fishless ponds. These attributes make A. junius an ideal species foraddressing the influence of migration on population size structure and localpopulation/community dynamics. We outline experiments with A. junius and other co-occurring odonate larvae evaluating these effects.Section I tests: a) the effects of size variation on cannibalism in paired A. juniuslarvae and the likelihood of cannibalism within and between cohorts of A. junius;and b) the effects of size-structure and temperature, two seasonally variablefactors, on cannibalism in populations of A. junius larvae.Section II tests the effects of population size-structure in a top predator (A. junius)on: a) the survival of intermediate predators and shared prey in a three speciesIGP system; and b) the relative contributions of density mediated interactions andtrait mediated interactions on risk reduction in a three species IGP system.

大规模的运动模式可以影响种群内和种群间大小结构的时空发生，但很少有研究明确地讨论这些模式是如何影响相互作用的，如同类相食和行内捕食(IGP)。蜻蜓Anax Junius是一种迁徙物种，经常在无鱼池塘中扮演顶级捕食者的角色。这些特性使朱尼尔成为研究迁徙对种群规模结构和当地种群/群落动态影响的理想物种。我们概述了用朱尼尔幼虫和其他共生幼虫进行的实验，以评估这些影响。第一节测试：a)大小变化对成对朱尼尔幼虫自相残食的影响，以及朱尼尔幼虫在队列内和队列之间自相残食的可能性；b)大小结构和温度这两个季节性可变因素对朱松幼虫种群自相残食的影响。第二节测试顶端捕食者(Junius)种群大小结构对三种IGP系统中中间捕食者和共享猎物的生存的影响；B)在三种群IGP系统中，密度介导的互作和特征介导的互作对降低风险的相对贡献。