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Dissertation Research: The Roles of Predation and Plant Chemistry in the Evolution of the Host Plant Specialization

论文研究：捕食和植物化学在寄主植物专业化进化中的作用

基本信息

批准号：
9223851
负责人：
金额：
$ 0.71万
依托单位：
University of Colorado at Boulder
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
1993
资助国家：
美国
起止时间：
1993-06-01 至 1995-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9223851&HistoricalAwards=false
关键词：
Dissertation Research Roles Predation Plant

项目摘要

Predators may play an important role in the evolution of diet specialization in phytophagous insects. This research will test the hypothesis that specialists are chemically and morphologically better defended against predation than generalists by offering both generalist and specialist lepidopteran larvae to two different invertebrate predators, Apiomerus pictipes (assassin bug) and Polistes carnifex (paper wasp) at Palo Verde National Park, Costa Rica. To test separately for the importance of prey chemistry as a determinant of predator rejections, we will also offer caterpillar extracts to the same predators. Results indicating that prey chemistry is an important deterrent to predators would only provide relatively weak evidence that plant chemistry is also important. Therefore, to test the importance of plant chemistry we will also rear specialist caterpillars on artificial diets containing varying amounts of host plant and offer those caterpillars and their extracts to the predators. Diet breadth of phytophagous insects is an important and current issue to evolutionary biology and ecology, including the potential for herbivorous insects to become serious agricultural pests. This project is the first to test the combined importance of plant chemistry and predation in determining diet breadth.

捕食者可能在进化过程中扮演重要角色食植性昆虫的饮食专门化。这研究将检验专家是在化学和形态上更好地抵御捕食比通才提供两个通才和专业的鳞翅目幼虫无脊椎动物捕食者，Apiomerus pictipes（刺客在帕洛韦尔迪，哥斯达黎加的国家公园。要分别测试猎物化学作为决定性因素的重要性捕食者拒绝，我们也将提供卡特彼勒提取物给同样的捕食者结果指示猎物的化学物质是一个重要的威慑因素，捕食者只能提供相对较弱的证据植物化学也很重要。因此测试植物化学的重要性，我们还将用人工饲料饲养专业毛毛虫含有不同数量的寄主植物，那些毛虫和它们的提取物给掠食者。植食性昆虫的食性宽度是一个重要的也是进化生物学和生态学的热点问题包括草食性昆虫成为严重的农业害虫。该项目是第一次测试植物的综合重要性化学和捕食作用决定饮食宽度。