Reproductive isolation, asynchrony, and incompatibility in fragmented prairie populations of Echinacea angustifolia

狭叶紫锥菊零散草原种群的生殖隔离、异步和不亲和性

基本信息

批准号：
1355187
负责人：
Stuart Wagenius
金额：
$ 20万
依托单位：
Chicago Horticultural Society
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2014
资助国家：
美国
起止时间：
2014-04-01 至 2018-03-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1355187&HistoricalAwards=false
关键词：
Reproductive isolation asynchrony incompatibility fragmented

项目摘要

The ability of organisms to successfully reproduce in small, isolated populations is a key factor in the generation and maintenance of biological diversity. Reproductive failure due to isolation is a current prospect for many of the long-lived, perennial plants that make up most of the grasslands of the central U.S. because these grasslands now exist mainly as small remnants of a once great prairie. Previous research has suggested that three of the most important causes of reproductive failure in prairie plants are mismatches in the timing of flowering, limited ability to disperse pollen, and mechanisms of compatibility that restrict mating between closely related individuals. This project will be the first to test how all three of these factors operate together in a natural system. Researchers will measure timing and compatibility of plants of Echinacea angustifolia (coneflowers) in 27 populations in Minnesota over three years and merge these data with an 18-year, continuing study on the population growth of the species. The intended result is a unified understanding of how habitat fragmentation affects the reproductive potential of grassland plants. The broader impacts of this project include conservation of biodiversity, student training, and new tools for the scientific community. Results will be communicated to land managers and the general public through the outreach programs and collaborations of the Chicago Botanical Garden. Baccalaureate and graduate students will learn new skills in population biology and computing. The project will publish its detailed spatial and temporal data sets of reproduction in Echinacea and develop freely available software to enable other researchers to manage, visualize, and analyze this information in Echinacea and other species.

生物体在小孤立的种群中成功繁殖的能力是生物多样性的产生和维持的关键因素。由于隔离而导致的生殖失败是许多构成美国中部大部分草原的多年生植物的前景，因为这些草原现在主要是曾经是一家曾经伟大的大草原的小残留物。先前的研究表明，草原植物中生殖失败的三个最重要原因是在开花的时机，有限分散花粉的能力和兼容机制的不匹配，并限制了密切相关的个体之间的交配。该项目将是第一个测试所有这三个因素如何在自然系统中共同运行的项目。研究人员将在明尼苏达州27个人群中衡量紫chin虫的植物（锥花）植物的时间和兼容性，并将这些数据与对物种人口增长的18年持续研究合并。预期的结果是对栖息地分裂如何影响草原植物生殖潜力的统一理解。该项目的更广泛影响包括保护生物多样性，学生培训和科学界的新工具。结果将通过芝加哥植物园的外展计划和合作将结果传达给土地经理和公众。学士学位和研究生将学习人口生物学和计算方面的新技能。该项目将发布其详细的空间和时间数据集在紫锥菊中的繁殖，并开发自由使用的软件，以使其他研究人员能够管理，可视化和分析Echinacea和其他物种中的这些信息。