Collaborative Research: LTREB: Evolutionary Demography - the Contribution of Adaptation and Environment to Population Dynamics, Range Size, and Niche Width

合作研究：LTREB：进化人口学 - 适应和环境对种群动态、范围大小和生态位宽度的贡献

• 批准号: 1255141
• 负责人: David Moeller
• 金额: $ 16.03万
• 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: 2013
• 资助国家: 美国
• 起止时间: 2013-03-01 至 2018-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1255141&HistoricalAwards=false
• 关键词: Collaborative; Research; LTREB; Evolutionary; Demography

This project continues a 7-year study of environmental and demographic variation across the geographic range of a native California plant in order to understand the ecological and evolutionary limits on an organism's distribution. Prior work showed that environmental variables related to climate, soils, and interactions with insect pollinators and seed-eaters all change across the plant's range. Population growth rates, a measure of population viability, also decline toward the range edge. Over the next five years, research will examine the role that dormant seeds, which remain buried in the soil for 2-5 years, play in allowing populations to weather adverse environments and persist long-term. The project will also determine range-wide differences in the longevity of dormant seeds.With impending climate change, parts of the current geographic range of many organisms are likely to become unsuitable for continued persistence. Understanding what limits species from colonizing unfavorable environments now can help forecast species responses to deteriorating conditions within their current range. In addition to its scientific impacts, the project will serve an important educational mission by engaging high school students, undergraduate students from research and primarily undergraduate institutions, and graduate students in research. Project leaders will work with high school students from a rural California high school and from a charter school in St Paul Minnesota through in-class activities and field projects.

该项目继续对加利福尼亚土著工厂的地理范围内的环境和人口变化进行了7年的研究，以了解生物分布的生态和进化限制。先前的工作表明，与气候，土壤以及与昆虫传粉媒介和种子食物相互作用有关的环境变量均在植物范围内发生变化。人口增长率是人口可行性的衡量标准，也下降了范围边缘。在接下来的五年中，研究将研究埋在土壤中2 - 5年的休眠种子的作用，在允许种群的环境不利环境并持续长期存在的作用。该项目还将确定休眠种子寿命的范围差异。随着气候变化，当前许多生物的当前地理范围的一部分很可能不适合继续持久。了解哪些物种从殖民不利的环境中的限制可以帮助预测物种对当前范围内恶化的响应。除了其科学影响外，该项目还将通过吸引高中生，研究和主要是本科机构的本科生以及研究生的研究生来执行重要的教育任务。项目负责人将与来自加利福尼亚州农村高中的高中学生和圣保罗明尼苏达州的特许学校合作，通过课堂活动和实地项目。