Research Starter Grant. The Consequences of Variation in Predator-Prey Interactions: Models and Tests Using a Seed-Beetle and Parasitoid

研究启动补助金。

• 批准号: 0309177
• 负责人: Brian Inouye
• 金额: $ 3万
• 依托单位: Florida State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-05-01 至 2005-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0309177&HistoricalAwards=false
• 关键词: Research; Starter; Grant.; Consequences; Variation

Research Starter: The Consequences of Variation in Predator-Prey Interactions: Models and Tests Using a Seed-Beetle and Parasitoid.Inouye, Brian D. Florida State University DEB: 0309177Parasitoids are common and diverse members of most ecosystems that play an important role in limiting insect herbivore populations. Due in part to their ecological and economic significance, host-parasitoid interactions have been the subject of many previous empirical and theoretical studies. To compliment on-going fieldwork and modeling efforts, this project will use populations of the seed-feeding bruchid weevil Callosobruchus maculatus and the parasitoid Anisopteromalis calandrae as a model system for studying factors affecting population regulation and stability. One of the major mechanisms thought to stabilize host and parasitoid population dynamics is heterogeneity in parasitoid attack rates. Such heterogeneity may occur when a parasitoid must search for its host in a patchy environment, for example when the host is a polyphagous herbivorous insect that feeds differentially on a number of types of resource plants. One goal of this research project will be to parameterize a model of host-parasitoid interactions including these alternative resources of the host, in order to test hypotheses about host and parasitoid population stability. First the functional responses of parasitoids attacking C. maculatus in several species or varieties of legume seeds will be characterized, in order to identify alternative resources that provoke different patterns of parasitoid attack. In a second stage of experiments, the effects of the resource driven heterogeneity on the stability of the host and parasitoid population dynamics will be tested. To characterize long-term population dynamics generation-long response surface experiments will be used to parameterize joint host-parasitoid recruitment curves. These experiments will allow a test of the importance of parasitoid density for functional responses, as part of the process of parameterizing the population models. Developing these species as a model system will further the long-term goals of blending theory and experiments to understand the roles of spatial heterogeneity and nonlinearities in population dynamics and community structure, and developing novel applications of statistical methods for testing new ecological theory.

研究启动：捕食者-猎物相互作用变化的后果：使用种子甲虫和寄生虫的模型和测试。佛罗里达州立大学DEB：0309177寄生蜂是大多数生态系统中常见且多样的成员，在限制植食性昆虫种群方面发挥重要作用。部分由于其生态和经济意义，寄主-寄生物相互作用一直是许多以前的经验和理论研究的主题。为了配合正在进行的实地考察和建模工作，本项目将使用种子喂养豆象Callosobruchus maculatus和寄生虫Anisopteromalis calcium作为一个模型系统，研究影响人口调控和稳定性的因素。 被认为是稳定主机和寄生蜂种群动态的主要机制之一是寄生蜂攻击率的异质性。 这种异质性可能发生在寄生蜂必须在斑块环境中寻找其宿主时，例如当宿主是一种多食性草食性昆虫时，其以多种类型的资源植物为食。 本研究项目的一个目标将是parameterized主机和寄生虫的相互作用，包括这些替代资源的主机，以测试有关主机和寄生虫种群稳定性的假设模型。 首先研究了寄生蜂攻击红腹锦鸡儿的功能反应。将对几个物种或品种的豆科植物种子中的斑点进行鉴定，以确定引起不同寄生虫攻击模式的替代资源。在第二阶段的实验中，将测试的影响，资源驱动的异质性的主机和寄生虫种群动态的稳定性。为了表征长期的种群动态世代长的响应面实验将被用来parameterized联合主机-寄生蜂招聘曲线。 这些实验将允许测试的重要性寄生密度的功能反应，作为参数化的人口模型的过程的一部分。 发展这些物种作为一个模型系统将进一步的长期目标，混合理论和实验，以了解空间异质性和非线性的作用，在人口动态和社区结构，并开发新的应用统计方法来测试新的生态理论。