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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：
2051562
负责人：
Stuart Wagenius
金额：
$ 13.98万
依托单位：
Chicago Horticultural Society
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=2051562&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.

该项目继续对紫色金光菊（紫锥菊）的自然选择进行长期研究。 1800 年代初，草原覆盖了北美的大片地区。从那时起，大约99%的高草草原已被毁坏。剩下的小片孤立的草原蕴藏着丰富的生物多样性，但这些残余草原的当地植物灭绝率却高得惊人。该项目正在推进对为什么一些种群灭绝而另一些种群持续存在的科学理解。该项目建立在对这些生态和遗传过程以及它们之间影响模型草原植物物种的反馈的长期调查的基础上。紫色金光菊因其寿命长（通常长达数十年）和其他特性而成为草原植物的典型。这项研究是同类研究中第一个衡量人口适应能力的研究。除了向科学家和土地管理者传播科学知识和传播信息外，该项目还为不同的参与者提供适合其兴趣和职业阶段水平的研究经验和培训：明尼苏达州和芝加哥植物园的高中、大学和研究生、教师和公民科学家。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、种群分化和近交衰退的加性遗传方差。研究人员将使用紫苑统计模型来估计 2003 年种植的个体的达尔文适应性的遗传变异量，其中许多个体在 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适应性的降低。连同 1996 年开始的残余人口普查，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中进行的，包括金光菊与其传粉者和食草动物的相互作用。核心数据集包含连续的个体健康记录，包括明尼苏达州 10 个实验地和 27 个自然草原遗迹中 17,000 多种植物的年生存和繁殖情况。这些数据集在项目结束时将持续长达 30 年，为了解长寿物种的进化和生态过程的相互作用提供了一个难得的窗口。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

期刊论文数量（11）

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

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

R code and data for “Offspring emergence, but not survival, increases with maternal mating opportunity"

R 代码和数据 – 后代出现率随母体交配机会增加，但存活率不增加"

DOI：
10.13020/b74k-7f48
发表时间：
2022
期刊：
Data Repository for the University of Minnesota (DRUM
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

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