Collaborative Research: LTREB Renewal: Feedbacks between evolution and demography in severely fragmented prairie populations of the purple coneflower, Echinacea angustifolia

合作研究：LTREB 更新：严重分散的紫色金光菊、紫锥菊草原种群的进化和人口统计学之间的反馈

基本信息

批准号：
2050455
负责人：
Ruth Shaw
金额：
$ 53.94万
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：
2021
资助国家：
美国
起止时间：
2021-04-01 至 2026-03-31
项目状态：
未结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2050455&HistoricalAwards=false
关键词：
Collaborative Research LTREB Renewal Feedbacks

项目摘要

This project continues a long-term study of natural selection in the purple coneflower, Echinacea angustifolia. At the beginning of the 1800s, prairie covered a great swath of North America. Since then, about 99% of the tallgrass prairie has been destroyed. The small, isolated patches of prairie that remain harbor great biodiversity, yet rates of local plant extinctions are alarmingly high in these remnant prairies. This project is advancing scientific understanding of why some populations go extinct and others persist. This project builds on a long-term investigation of these ecological and genetic processes and feedbacks between them affecting a model prairie plant species. The purple coneflower typifies prairie plants in its long lifespan, often decades, and in other attributes. This study is the first of its kind to measure the capacity of a population to adapt. In addition to advancing scientific knowledge and disseminating information to scientists and land stewards, this project provides research experience and training to diverse participants at a level appropriate for their interests and career stage: high school, college, and graduate students, teachers, and citizen scientists in both Minnesota and at the Chicago Botanic Garden. The project uses formal quantitative genetic approaches and common garden experimental designs to quantify additive genetic variance for fitness, population differentiation, and inbreeding depression. Researchers will use aster statistical models to estimate the amount of genetic variation in Darwinian fitness of individuals planted in 2003, many of which flowered for the first time in 2015. Other experiments will estimate the reduction in mean fitness due to mating between siblings. Together with demographic censuses of remnant populations, started in 1996, these studies will yield comprehensive assessments of population growth rates and the potential for evolutionary rescue. A key strength of the research is that experiments are conducted in a realistic habitat, including interactions of the coneflower with its pollinators and herbivores. The core datasets comprise continuous individual fitness records, including annual survival and reproduction of over 17,000 plants in 10 experimental plots and across 27 natural prairie remnants in Minnesota. These datasets, which will extend up to 30 years by the end of the project, offer a rare window into the interplay of evolutionary and ecological processes of a long-lived species.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

该项目继续对紫色圆锥体紫锥菊安吉斯蒂利亚（Angustifolia）进行自然选择的长期研究。在1800年代初，草原覆盖了北美的大片。从那时起，大约99％的塔格拉斯草原被摧毁。剩下的小小的大草原斑块具有巨大的生物多样性，但这些残余大草原的植物灭绝率令人震惊地很高。该项目正在促进科学理解，即某些人群为什么灭绝而另一些人民仍然持续存在。该项目基于对这些生态和遗传过程的长期研究，以及它们之间的反馈影响了模型的草原植物物种。紫色的圆锥花在其漫长的寿命（通常数十年）和其他属性中代表草原植物。这项研究是衡量人群适应能力的第一个研究。除了促进科学知识并向科学家和土地管家传播信息外，该项目还为各种级别的参与者提供了研究经验和培训，适合他们的利益和职业阶段：明尼苏达州和芝加哥植物园的高中，大学，大学，大学生，老师和公民科学家。该项目使用正式的定量遗传方法和常见的花园实验设计来量化适应性，人群分化和近交抑郁症的添加遗传差异。研究人员将使用ASTER统计模型来估计2003年种植的个体达尔文适应性的遗传变异量，其中许多人在2015年首次开花。其他实验将估计由于兄弟姐妹之间的交配而导致的平均健身降低。这些研究始于1996年的残留人口普查，这些研究将对人口增长率和进化救援的潜力进行全面评估。该研究的一个关键优势是实验是在现实的栖息地进行的，包括锥花与其授粉媒介和食草动物的相互作用。核心数据集构成了连续的个人健身记录，包括在10个实验地块中以及明尼苏达州的27种自然草原残留物中的17,000多种植物的年生存和繁殖。这些数据集将在项目结束时延长30年，为长期寿命的物种的进化和生态过程提供了罕见的窗口。该奖项反映了NSF的法定任务，并被认为是值得通过基金会的知识分子优点和更广泛影响的审查标准来通过评估来获得支持的。

项目成果

期刊论文数量（6）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Fires slow population declines of a long-lived prairie plant through multiple vital rates

火灾通过多种生命率减缓了长寿草原植物的种群数量下降

DOI：
10.1007/s00442-021-04955-2
发表时间：
2021
期刊：
Oecologia
影响因子：
2.7
作者：
Nordstrom, Scott W.;Dykstra, Amy B.;Wagenius, Stuart
通讯作者：
Wagenius, Stuart

Masting, fire‐stimulated flowering, and the evolutionary ecology of synchronized reproduction

桅杆、火刺激开花以及同步繁殖的进化生态学

DOI：
10.1002/ecy.4261
发表时间：
2024
期刊：
Ecology
影响因子：
4.8
作者：
Beck, Jared J.;McKone, Mark J.;Wagenius, Stuart
通讯作者：
Wagenius, Stuart

High juvenile mortality overwhelms benefits of mating potential for reproductive fitness

高幼体死亡率压倒了交配潜力对生殖健康的好处

DOI：
10.1086/730112
发表时间：
2024
期刊：
The American Naturalist
影响因子：
0
作者：
Waananen, Amy;Richardson, Lea K;Thoen, Riley D;Nordstrom, Scott W;Eichenberger, Erin G;Kiefer, Gretel;Dykstra, Amy B;Shaw, Ruth G;Wagenius, Stuart
通讯作者：
Wagenius, Stuart

Fire effects on plant reproductive fitness vary among individuals reflecting pollination‐dependent mechanisms

火灾对植物繁殖适应性的影响因个体而异，反映了授粉依赖机制