Dissertation Research: The Effect of Inbreeding on Nitrogen-use-efficiency

论文研究：近交对氮利用效率的影响

• 批准号: 0206691
• 负责人: Donald Alstad
• 金额: $ 0.8万
• 依托单位: University of Minnesota-Twin Cities
• 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: 2002-07-01 至 2003-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0206691&HistoricalAwards=false
• 关键词: Dissertation; Research; Effect; Inbreeding; Nitrogen

Nitrogen deposition, habitat fragmentation, and inbreeding can reduce the likelihood that a plant population may persist. While many studies explore the effect of a single disturbance, native plant populations are likely to experience multiple and simultaneous disturbances. The efficiency with which individuals acquire and use nitrogen (NUE) affects the response of populations to nitrogen deposition. This response is sensitive to inbreeding caused by fragmentation that can reduce NUE. It is therefore important to investigate these perturbations together. Greenhouse studies with experimentally inbred plants will address the quantitative effect of inbreeding on the acquisition and use of nitrogen. Field studies of fragmented populations will address the effect of fragmentation on inbreeding and NUE. The results of these empirical studies will be used to predict the response of plants in fragmented landscapes to increased nitrogen deposition. These studies will examine the mechanistic basis underlying previously documented responses of populations to perturbation. The work, involving quantitative genetic analysis of the ecologically specific attribute NUE will incorporate genetics into ecosystem and community ecological study. Population persistence is a product of individuals' varied responses to the environment. Simultaneous consideration of genetic and environmental contributions to population dynamics is essential as conservation biologists and other scientists make predictions about future persistence.

氮沉降、生境破碎化和近亲繁殖可以降低植物种群持续存在的可能性。 虽然许多研究探讨了单一干扰的影响，但本地植物种群可能会经历多重和同时的干扰。 个体获取和利用氮的效率影响着种群对氮沉降的反应。 这种反应是敏感的近亲繁殖所造成的碎片，可以降低NUE。 因此，重要的是一起研究这些扰动。 用实验性近交植物进行的温室研究将解决近交对氮的获得和利用的定量影响。 对分散种群的实地研究将解决分散对近亲繁殖和NUE的影响。 这些实证研究的结果将被用来预测破碎景观中的植物对氮沉降增加的反应。 这些研究将审查以前记录的人口对扰动的反应的机械基础。这项工作，涉及生态特定属性NUE的定量遗传分析，将遗传学纳入生态系统和社区生态学研究。 种群持续性是个体对环境的不同反应的产物。 同时考虑遗传和环境对种群动态的贡献是必不可少的，因为保护生物学家和其他科学家对未来的持久性进行预测。