Top-Down versus Bottom-Up Control in Insect Populations: High Order Interactions and Spatial Variation

昆虫种群中自上而下与自下而上的控制：高阶相互作用和空间变化

• 批准号: 9903601
• 负责人: Robert Denno
• 金额: $ 32.01万
• 依托单位: University of Maryland, College Park
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-07-15 至 2003-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9903601&HistoricalAwards=false
• 关键词: Top; Down; versus; Bottom; Up

9903601DennoThis study will examine the role of "top-down versus bottom-up" control in insect populations. It will provide a unique opportunity to address these issues and to assess spatial variation and may have many applications in the control of planthopper populations. This study will use a series of field and laboratory experiments coupled with path analysis and structural modeling. In particular, this research will investigate the individual and interactive effects of two abundant invertebrate predators (wolf spiders and mirid bugs) which co-occur on the Atlantic salt marshes of North America. It is hoped it will determine the consequence of their interaction on the population and growth of their shared prey, a common planthopper that feeds on the phloem sap of Spartina cordgrass. The ability to predict the combined effects of multiple predators is critical both to the refinement of predator-prey efforts and to the improved management of severe agricultural pests such as planthoppers

9903601 Denno本研究将检验“自上而下与自下而上”控制在昆虫种群中的作用。它将为解决这些问题和评估空间变异提供一个独特的机会，并可能在控制稻飞虱种群方面有许多应用。本研究将使用一系列的现场和实验室实验，加上路径分析和结构建模。特别是，这项研究将调查两个丰富的无脊椎动物捕食者（狼蛛和盲蝽）共同出现在北美大西洋盐沼的个人和相互作用的影响。人们希望这将决定它们之间的相互作用对它们共同猎物的数量和生长的影响，这是一种以米草韧皮部汁液为食的常见稻飞虱。预测多个捕食者的联合效应的能力对于改进捕食者-被捕食者的努力和改进对严重农业害虫如稻飞虱的管理都是至关重要的