Dissertation Research: Consequences of Habitat Fragmentation for Plant-Pollinator Interactions

论文研究：栖息地破碎化对植物与传粉者相互作用的影响

• 批准号: 0206747
• 负责人: Martin Morgan
• 金额: $ 0.57万
• 依托单位: Washington State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-06-01 至 2003-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0206747&HistoricalAwards=false
• 关键词: Dissertation; Research; Consequences; Habitat; Fragmentation

AbstractEcological processes are key to global efforts to maintain biological diversity. Pollination is an essential ecological process, but widespread habitat fragmentation is disrupting native plant-pollinator interactions worldwide and threatens long-term conservation of native communities. Habitat fragmentation reduces populations, and recent studies have revealed a positive correlation between population size and plant reproductive success. The major challenge is to understand the mechanisms underlying this correlation. In the proposed work, three possible causes of the above correlation will be examined: 1) reduced pollinator attraction could lower reproductive success in fragments, 2) lower pollinator diversity in fragments may increase pollinator limitation, and 3) smaller population sizes may result in greater inbreeding (and concomitant inbreeding depression). These mechanisms will explored for two species, Geranium viscosissimum and Asclepias speciosa, using both observational and experimental approaches.

摘要生态过程是全球努力维持生物多样性的关键。传粉是一个重要的生态过程，但广泛的栖息地破碎化正在破坏全球本土植物-传粉者的相互作用，并威胁到本土社区的长期保护。栖息地的破碎化减少了种群数量，最近的研究表明，种群规模和植物繁殖成功之间存在正相关关系。主要的挑战是了解这种相关性背后的机制。 在拟议的工作中，上述相关性的三个可能的原因将被检查：1）减少传粉者吸引力可能会降低碎片的繁殖成功率，2）碎片中传粉者多样性较低可能会增加传粉者限制，3）较小的种群规模可能会导致更大的近亲繁殖（和随之而来的近亲繁殖衰退）。这些机制将探讨两个物种，Gerendum viscosissimum和Asclepias speciosa，使用观察和实验方法。