Collaborative Research: Ecological and Evolutionary-Genetic Limits to Range Expansion

合作研究：生态和进化遗传对范围扩展的限制

• 批准号: 0515466
• 负责人: Peter Tiffin
• 金额: --
• 依托单位: University of Minnesota-Twin Cities
• 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=0515466&HistoricalAwards=false
• 关键词: Collaborative; Research; Ecological; Evolutionary; Genetic

The goal of the project is to understand the ecological and genetic factors that prevent an organism from living in environments that are outside its current geographic distribution. For the plant, Clarkia xantiana, the researchers will quantify: (1) the degree to which populations are adapted to their local environment; (2) the potential for populations to adapt to novel environments; (3) migration of individuals from the interior to the edge of the range, which may impede adaptation; and (4) the risk of extinction of populations at the range edge. Environmental conditions in and outside the current range will also be quantified. The data will be obtained from experimental studies of populations in the field, molecular genetic studies in the lab, and GIS modeling. Together, these data will allow the researchers to evaluate predictions from theoretical models.The results from this research will help us understand why animal and plant species occur where they do and not elsewhere and what sets the limits biodiversity in a given area. Answers to these questions are important for understanding the effects of anthropogenic change on the long-term success of species. Undergraduate students from a 4-year college and two universities will participate in the study. The researchers will also be involved in public education on biodiversity in southern California where the study will be conducted.

该项目的目标是了解阻止生物体在其当前地理分布之外的环境中生活的生态和遗传因素。对于克拉克兰（Clarkia xantiana）植物，研究人员将量化：(1)种群对当地环境的适应程度；(2)种群适应新环境的潜力；(3)个体从内部向边缘迁移，可能阻碍适应；(4)边缘种群的灭绝风险。在当前范围内外的环境条件也将被量化。这些数据将从实地种群实验研究、实验室分子遗传学研究和地理信息系统建模中获得。总之，这些数据将使研究人员能够评估理论模型的预测。这项研究的结果将帮助我们理解为什么动物和植物物种出现在它们所在的地方，而不是其他地方，以及是什么限制了特定地区的生物多样性。这些问题的答案对于理解人为变化对物种长期成功的影响非常重要。来自一所四年制学院和两所大学的本科生将参与这项研究。研究人员还将参与南加州生物多样性的公共教育，该研究将在那里进行。