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

LTREB 更新：合作研究：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：
1051791
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：
2011
资助国家：
美国
起止时间：
2011-04-01 至 2017-03-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1051791&HistoricalAwards=false
关键词：
LTREB Renewal COLLABORATIVE RESEARCH Interplay

项目摘要

This project investigates the interactions of demography and genetics in remnant populations of a prairie plant that serves as a model for advancing understanding of the roles of these interactions in evolutionary change and persistence of populations in changing and fragmented habitats. Echinacea angustifolia, a long-lived perennial plant, was once abundant in the plains and prairies of the United States but now is confined to small remnants of prairie following extensive conversion of land to agriculture. Genetic composition of E. angustifolia populations affects their demography, which in turn influences evolutionary change in genetics and ecology. These feedbacks are critical to the persistence and ongoing evolution of the plant. This project will continue annual censuses of all life stages of E. angustifolia within a 6400 hectare area in Minnesota and will monitor plants in three experiments that are designed to 1) reveal divergence among remnant populations in health, survival, and reproduction of individuals, 2) show how inbreeding and gene flow between remnants affect progeny fitness, and 3) assess the potential of fragmented populations to adapt to ongoing environmental change. This project is elucidating the interplay of evolutionary and ecological processes to improve understanding of persistence and adaptation in changing environmental conditions. Results from this project inform the conservation and management of long-lived native plants in fragmented habitat and provide tools for analyzing demographic and genetic processes in other populations.

该项目调查了草原植物残留种群中人口统计学和遗传学的相互作用，该植物的残余人口是一种模型，以促进对这些相互作用在进化变化中的作用以及人群在变化和破碎栖息地中的持久性中的作用。紫锥菊是一种长期寿命的多年生植物，在美国的平原和大草原上曾经很丰富，但现在被限制在土地向农业的大规模转换后，仅限于草原的小残留物。大肠杆菌种群的遗传组成会影响其人口统计学，这反过来影响遗传学和生态学的进化变化。这些反馈对于植物的持久性和持续发展至关重要。该项目将继续在明尼苏达州6400公顷内的所有生命阶段的年度人口普查，并将监测三个实验中的植物，这些实验旨在揭示健康，生存和生殖的残留人群之间的差异，2）在繁殖和基因流动之间如何对环境产生影响，并显示出对适应性的范围，以及3）的范围。改变。该项目正在阐明进化和生态过程的相互作用，以提高对环境条件变化的持久性和适应性的理解。该项目的结果为零散的栖息地中长寿植物的保护和管理提供了信息，并提供了分析其他人口的人口统计学和遗传过程的工具。