LTREB Renewal: Evolutionary and Demographic Responses to Climate in Natural Populations

LTREB 更新：自然种群对气候的进化和人口反应

• 批准号: 2135270
• 负责人: Diane Campbell
• 金额: $ 59.97万
• 依托单位: University of California-Irvine
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-02-01 至 2027-01-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2135270&HistoricalAwards=false
• 关键词: LTREB; Renewal; Evolutionary; Demographic; Responses

The purpose of this study is to understand how a rapidly changing environment influences natural selection and population size. Many species of plants and animals can be threatened by rapid environmental change, such as an increase in frequency or severity of drought. This research will test the conditions required for a population to avoid collapse due to climate change, through a process of adapting to the new environmental conditions. It will add to the longest-running data set on how selection in plants responds to changes in annual snowpack and pollinator availability, and to model for the first time how adaptation to these conditions allows populations to recover. It will determine how selective pressures change in response to water availability, how genetic variation in leaf and flower traits interact with climate change to affect birth and death rates, and how changes in pollination interacts with the physical environment to influence evolutionary change. Responses of population size to climate change will be projected over the next century and provide a case study of how other species might respond. The project will include the training of diverse undergraduate and graduate students and postdoctoral associates. Field science tours at the Rocky Mountain Biological Laboratory (RMBL) will be led for outreach to the general public. In addition, a citizen science project will allow the public to contribute to the building of maps of pollinator abundance across the western US. This project will continue a long-term field study near the RMBL to measure natural selection on, and the extent of genetic variance in, vegetative and floral traits of Ipomopsis aggregata subspp. aggregata and Ipomopsis tenuituba (Polemoniaceae). By the end of the grant period there will be 16 to 23 years of data on selection (depending on the trait) to examine associations between selection and snowmelt date. In combination with unique data on how absolute fitness is altered by snowmelt date, models for evolutionary rescue will be fully parameterized in nature. The project will examine the dependence of evolutionary and demographic responses on genetic variance in traits, as measured from common gardens with a full-sib breeding design. The extent of adaptive phenotypic plasticity in response to annual snowmelt date and summer precipitation will also be incorporated into projections of population size. Although prior studies of plant adaptation to climate have emphasized vegetative traits, floral traits (shape, color, rewards, volatiles) will be modeled as well, as selection on them depends on water availability and pollinator abundance.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.

这项研究的目的是了解快速变化的环境如何影响自然选择和种群规模。许多动植物物种可能会受到快速环境变化的威胁，例如干旱频率或严重程度的增加。这项研究将通过适应新的环境条件的过程，测试人口避免因气候变化而崩溃所需的条件。它将增加运行时间最长的数据集，了解植物的选择如何响应每年积雪和传粉者可获得性的变化，并首次模拟适应这些条件如何使种群恢复。它将确定选择压力如何随着水分供应的变化而变化，叶和花性状的遗传变异如何与气候变化相互作用来影响出生率和死亡率，以及授粉变化如何与物理环境相互作用来影响进化变化。将在下个世纪预测种群规模对气候变化的反应，并为其他物种可能如何反应提供一个案例研究。该项目将包括培训不同的本科生和研究生以及博士后助理。将带领落基山生物实验室(RMBL)进行实地科学考察，向普通公众宣传。此外，一项公民科学项目将允许公众为美国西部传粉者丰度地图的构建做出贡献。该项目将继续在RMBL附近进行一项长期的实地研究，以测量通菜亚种营养和花卉性状的自然选择和遗传变异的程度。Aggregata和Ipomopsis tenuituba(Polemoniae)到授权期结束时，将有16至23年关于选择的数据(取决于特征)，以检查选择与融雪日期之间的联系。结合有关绝对适合度如何因融雪日期而改变的独特数据，进化救援模型将在自然界中完全参数化。该项目将研究进化和人口统计反应对性状遗传变异的依赖性，这是从具有全同胞育种设计的普通花园测量的。对每年融雪日期和夏季降水量的适应性表型可塑性程度也将纳入种群规模预测。尽管之前植物适应气候的研究强调了营养特性，但花特性(形状、颜色、奖励、挥发物)也将被模拟，因为它们的选择取决于水的可获得性和传粉者的丰富程度。这一奖项反映了NSF的法定使命，并通过使用基金会的智力优势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

Pollinator and habitat-mediated selection as potential contributors to ecological speciation in two closely related species

传粉者和栖息地介导的选择作为两个密切相关物种生态物种形成的潜在贡献者

• DOI: 10.1093/evlett/qrad060
• 发表时间: 2023
• 期刊: Evolution Letters
• 影响因子: 5
• 作者: Campbell, Diane R;Powers, John M;Crowell, Madison
• 通讯作者: Crowell, Madison

An analytical pipeline to support robust research on the ecology, evolution, and function of floral volatiles

• DOI: 10.3389/fevo.2022.1006416
• 发表时间: 2022-10-20
• 期刊: FRONTIERS IN ECOLOGY AND EVOLUTION
• 影响因子: 3
• 作者: Eisen，Katherine E. E.;Powers，John M. M.;Campbell，Diane R. R.
• 通讯作者: Campbell，Diane R. R.

Effects of experimental warming on floral scent, display and rewards in two subalpine herbs

• DOI: 10.1093/aob/mcad195
• 发表时间: 2023-12-23
• 期刊: ANNALS OF BOTANY
• 影响因子: 4.2
• 作者: Wu，Carrie;Powers，John M.;Campbell，Diane R.
• 通讯作者: Campbell，Diane R.