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.

大规模运动模式会影响人群之间和人群之间的大小结构的时空发生，但很少有研究明确地解决了这些模式，影响了这种相互作用，例如食人群和内在捕食（IGP）。 TheDragonfly Anax Junius是一种迁移并经常在无鱼池塘中扮演顶级预言的物种。这些属性使A. Junius成为理想的物种，表现了迁移对人口大小结构和局部人群/社区动态的影响。我们概述了A. junius和其他同时发生的Odonate幼虫的实验，评估了这些效果。节I测试：a）尺寸变化对成对的A. juniuslarvae的食人族的影响，以及在A. Junius的同类群体内和之间的同性恋者内部和之间的食人的可能性； b）尺寸结构和温度的影响，两个季节性可变因素，对A. junius幼虫种群的食人族症。第II节测试了顶部捕食者（A. Junius）中种群大小结构的影响：a）中间捕食者的存活和在三个物种系统中共享猎物； b）密度介导的相互作用和特征相互作用对三种物种IGP系统的风险降低的相对贡献。