Collaborative Research: Coevolution of Hosts and Parasitoids Within a Geographic Mosaic

合作研究：地理马赛克中宿主和寄生蜂的共同进化

• 批准号: 0515655
• 负责人: Robert Holt
• 金额: $ 9万
• 依托单位: University of Florida
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-09-01 至 2010-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0515655&HistoricalAwards=false
• 关键词: Collaborative; Research; Coevolution; Hosts; Parasitoids

Coevolution - the process by which interacting species undergo reciprocal evolutionary change - is one of the major driving forces underlying the generation and maintenance of biodiversity. Research over the past decade has shown that spatial heterogeneity can influence coevolutionary interactions. However, a complete, mechanistic understanding of the influence of spatial heterogeneity on coevolution is still needed. The proposed research combines theoretical and empirical approaches to rigorously evaluate how spatial heterogeneity in resource availability and dispersal among habitat patches influence coevolution. It utilizes the bacterium Escherichia coli and the bacteriophage T7, a viral parasitoid of E. coli, as model coevolving organisms. Experiments in which dispersal and resource availability are directly manipulated will be combined with theoretical models that incorporate details of the host-parasitoid interaction to provide both qualitative and quantitative predictions of how dispersal across a heterogeneous landscape influences coevolution. This research provides a crucial middle ground between the relative simplicity of current mathematical models and the complexity of field studies. This research will add to our understanding of the geographic mosaic theory of coevolution and metacommunity theory, which underlie much of the work on habitat fragmentation in conservation biology. This work will also increase our understanding of coevolving microbes, which perform many crucial ecosystem services and which have been vastly understudied. Finally, the research will contribute to our general knowledge of how spatial heterogeneity influences the ecology and evolution of interacting organisms.

协同进化 - 相互作用的物种经历相互进化的过程 - 是生物多样性产生和维持的主要驱动力之一。在过去的十年中，研究表明，空间异质性会影响协同进化的相互作用。但是，仍然需要对空间异质性对协同进化的影响的完整机械理解。拟议的研究结合了理论和经验方法，以严格评估栖息地斑块中资源可用性和分散的空间异质性如何影响协同进化。它利用大肠杆菌细菌大肠杆菌和大肠杆菌病毒寄生虫的噬菌体T7作为模型辅助生物。直接操纵分散和资源可用性的实验将与理论模型相结合，这些模型结合了宿主 - 寄生虫相互作用的细节，以提供定性和定量预测，以预测如何在异质景观中分散如何影响协调。 这项研究在当前数学模型的相对简单性与现场研究的复杂性之间提供了至关重要的中间立场。这项研究将增加我们对共同进化和元社会理论的地理镶嵌理论的理解，这是保护生物学中栖息地分裂的大部分工作。这项工作还将增加我们对共同发展的微生物的理解，这些微生物执行许多关键的生态系统服务，并且已经进行了大量研究。最后，这项研究将有助于我们对空间异质性如何影响相互作用生物的生态和进化的一般知识。