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Dissertation Research: The Distribution of a Grasshopper Species Among New England Old Fields: Population Ecology Along an Environmental Gradient

论文研究：新英格兰旧田地中蝗虫物种的分布：沿环境梯度的种群生态学

基本信息

批准号：
9801665
负责人：
Oswald Schmitz
金额：
$ 0.57万
依托单位：
Yale University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
1998
资助国家：
美国
起止时间：
1998-06-15 至 1999-05-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9801665&HistoricalAwards=false
关键词：
Dissertation Research Distribution Grasshopper Species

项目摘要

9801665 Schmitz This proposal integrates components of population ecology and community ecology to investigate the biological and environmental factors that limit the distribution and abundance of a grasshopper species in New England old fields. This research will identify how variation in abiotic and biotic ecological factors shape the population ecology and subsequent distribution of Melanoplus femurrubrum. Field surveys demonstrated that this grasshopper is a generalist feeder that prefers grass resources that is restricted to old fields with less than 60% grass cover. Preliminary and ongoing research have indicated that competition and predation do not appear to be significant limiting factors for this species in these old fields. Based on this, two experiments will be performed. The first proposed set of experiments tests the hypothesis that bird and small mammal predators are the major limiting factors of M. femurrubrum. The second set of experiments tests the hypothesis that the distribution of this grasshopper is limited by the success of oviposition site selection and egg development. Overall, this research targets major hypotheses about the distribution of an insect of wide range and economic importance in a landscape heavily influenced by human activities, making this study relevant to basic ecology in the context of a human altered landscape.

9801665 Schmitz该提案整合了种群生态学和群落生态学的组成部分，以调查限制新英格兰老田地中蝗虫物种分布和丰度的生物和环境因素。本研究将探讨非生物生态因子与生物生态因子的变异如何影响股骨红丽鱼的族群生态与分布。实地调查表明，这蝗虫是一个多面手的饲料，更喜欢草资源，仅限于老领域与不到60%的草覆盖。初步和正在进行的研究表明，竞争和捕食似乎并没有显着的限制因素，这个物种在这些老领域。在此基础上，将进行两个实验。第一组实验验证了鸟类和小型哺乳动物捕食者是M的主要限制因素的假设。股骨红细胞第二组实验检验了这样的假设：这种蚱蜢的分布受到产卵地点选择和卵发育成功的限制。总体而言，本研究的目标主要假设的分布范围广，经济上的重要性，在景观受到人类活动的严重影响，使这项研究相关的基本生态学的背景下，人类改变景观的昆虫。