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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.

该项目将扩展对狭叶紫锥菊（Echinacea angustifolia）的遗传学和生态学研究，狭叶紫锥菊是一种原产于美国平原和草原的长寿多年生植物。过去一个世纪的土地利用变化已经消除了草原栖息地，将这种典型草原植物的数量限制在少量的残余物中。先前的工作揭示了狭叶桉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进化的影响，该项目将继续对明尼苏达州 6400 公顷研究区内 23 个草原残余物中生长的所有 E. angustifolia 开花植物进行年度普查。它将包括密集搜寻幼苗并随后监测其存活率，以评估剩余种群的招募率。这项研究还将继续在三个实验中监测植物，这些实验旨在：1）表征残余种群在个体健康、生存和繁殖方面的差异，2）确定近亲繁殖和残余交配如何影响后代的适应性，3）评估分散种群中的遗传变异。该项目对了解长寿草本植物的种群生物学做出了实质性贡献。该项目的结果将为破碎栖息地中常年种群的保护和管理提供信息。