DISSERTATION RESEARCH: Invasion Dynamics of the Parasitic Plant, Epifagus Virginiana

论文研究：寄生植物 Epifagus Virginiana 的入侵动力学

• 批准号: 0608310
• 负责人: Paul Manos
• 金额: $ 1.2万
• 依托单位: Duke University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-06-01 至 2010-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0608310&HistoricalAwards=false
• 关键词: DISSERTATION; RESEARCH; Invasion; Dynamics; Parasitic

This project investigates how parasites invade and persist in host populations. The study's approach is historical and compares the post-glacial migration of a parasitic plant, Epifagus virginiana (beechdrop; Orobanchaceae), with its host, Fagus grandifolia (American beech; Fagaceae). The objectives are (A) to reconstruct the broad scale colonization patterns of E. virginiana using genetic data, (B) to investigate potential forces (e.g., host density effects, limited parasite dispersal) limiting parasite infection through fine scale mapping and genotyping, and (C) to test for local adaptation of the parasite through germination studies. This research will produce a comprehensive migration history of this parasite with an emphasis on what factors influenced its invasion, and it builds upon previous work on the host's colonization history. Understanding what controls the spread of parasites is especially relevant today considering that future climate change may force species to move at their full migration capacities. The proposed study will provide significant data on herbaceous plant migration that is currently missing and can answer questions about the cohesiveness of communities during migration. Results from this study will be incorporated into interpretive signs along public nature trails that describe the natural history of the beech woods and parasitic plants.

本项目研究寄生虫如何入侵并在宿主种群中持续存在。这项研究的方法是历史性的，并比较了一种寄生植物Epifagus virginiana（山毛榉;列当科）与其宿主Fagus grandifolia（美国山毛榉;壳斗科）的冰后期迁移。本研究的目的是：（A）重建大规模的E. virginiana使用遗传数据，（B）调查潜在的力量（例如，宿主密度效应，有限的寄生虫扩散）通过精细比例作图和基因分型限制寄生虫感染，和（C）通过发芽研究测试寄生虫的局部适应性。这项研究将产生一个全面的迁移历史，这种寄生虫的重点是什么因素影响其入侵，它建立在以前的工作主机的殖民历史。 考虑到未来的气候变化可能迫使物种以其全部迁移能力迁移，了解是什么控制了寄生虫的传播在今天尤其重要。拟议的研究将提供有关草本植物迁移的重要数据，这些数据目前尚不清楚，并可以回答有关迁移过程中社区凝聚力的问题。这项研究的结果将被纳入解释性标志沿着公共自然步道，描述山毛榉树林和寄生植物的自然历史。