COLLABORATIVE RESEARCH: LTREB: The Interplay of Genetic and Numerical Dynamics in Severely Fragmented Prairie Populations of Echinacea Angustifolia

合作研究：LTREB：严重分散的狭叶紫锥菊草原种群遗传和数值动力学的相互作用

基本信息

批准号：
0544970
负责人：
Ruth Shaw
金额：
$ 22.5万
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：
2006
资助国家：
美国
起止时间：
2006-04-01 至 2012-12-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=0544970&HistoricalAwards=false
关键词：
COLLABORATIVE RESEARCH LTREB Interplay Genetic

项目摘要

This project will extend a study of genetics and ecology of Echinacea angustifolia, a long-lived perennial plant native to the plains and prairie of the United States. Land-use changes over the past century have eliminated prairie habitat, confining populations of this typical prairie plant to small remnants. Previous work has revealed feedbacks between the genetics and demography of E. angustifolia. To clarify the effects of these feedbacks on the persistence and ongoing evolution of this plant, this project will continue the annual census of all flowering plants of E. angustifolia growing in 23 prairie remnants within a 6400 hectare study area in MN. It will include intensive searches for seedlings and subsequent monitoring of their survival to evaluate recruitment rates among remnant populations. This research will also continue monitoring plants in three experiments designed to 1) characterize divergence among remnant populations in the health, survival, and reproduction of individuals, 2) determine how inbreeding and inter-remnant mating affect progeny fitness and 3) assess genetic variation in the fragmented populations. This project contributes substantively to understanding of the population biology of long-lived herbaceous plants. Results from this project will inform the conservation and management of perennial populations in fragmented habitat.

该项目将扩大对紫锥菊的遗传学和生态学的研究，这是美国平原和大草原的长期多年生植物。过去一个世纪的土地利用变化消除了草原栖息地，将这种典型的草原植物的种群限制在小残留物中。先前的工作揭示了E. angustifolia的遗传学和人口统计学之间的反馈。为了阐明这些反馈对该植物的持久性和持续发展的影响，该项目将继续在MN的6400公顷研究区内的23个草原残留物中生长的所有开花植物的每年人口普查。它将包括对幼苗的密集搜索以及随后对其生存的监测，以评估残留人群中的招聘率。这项研究还将继续监测三个设计的实验中的植物。1）表征个人在健康，生存和个人繁殖中的差异，2）确定近亲和纠纷之间的交配如何影响后代的适应性，3）评估脆弱人群的遗传变异。该项目有助于理解长寿植物的种群生物学。该项目的结果将为零散栖息地中多年生人口的保护和管理提供信息。