OCE-PRF Comparing the genomic bases of adaptation to seasonal and spatial temperature gradients in a widespread marine copepod

OCE-PRF 比较广泛分布的海洋桡足类适应季节和空间温度梯度的基因组基础

基本信息

批准号：
2205848
负责人：
Matthew Sasaki
金额：
$ 31.41万
依托单位：
University of Vermont & State Agricultural College
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2022
资助国家：
美国
起止时间：
2022-12-01 至 2024-11-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2205848&HistoricalAwards=false
关键词：
OCE PRF Comparing genomic bases

项目摘要

Copepods are some of the most abundant animals on the planet and play important roles in marine food webs and biogeochemical cycles. Ocean warming may negatively impact copepod populations, with cascading disruptions throughout marine ecosystems. However, in many regions, this warming occurs against a background of large seasonal shifts in temperature. Adaptation to the different conditions experienced over this annual temperature cycle may increase genetic diversity in copepod populations, better enabling them to cope with long-term warming. Understanding the effects of seasonal temperature fluctuations on copepod populations will enhance our ability to predict, plan for, and mitigate the effects of climate change on coastal fisheries and the communities that rely on them. Based at the University of Vermont, this project will provide opportunities to work with marine animals in a landlocked state, engaging students who may not otherwise have the chance to participate in the marine sciences.This project will combine field work, laboratory common garden experiments, and population genomics to investigate the prevalence and adaptive significance of seasonal thermal adaptation in a dominant coastal copepod (Acartia tonsa) across a large latitudinal thermal gradient. This integrative approach will provide important insights into the genomic bases of thermal adaptation, how concordant these patterns are over spatial and temporal scales, and the potential for seasonally fluctuating selection to enable marine copepods to respond to long-term warming. This project has three specific objectives: 1) Examine seasonal variation in thermal limits in populations of Acartia tonsa from sites across a large latitudinal thermal gradient; 2) Quantify and compare seasonal and spatial variation in allele frequency; and 3) Determine if seasonally adapted genotypes differ in key fitness-related traits (thermal limits, body size, and the temperature sensitivity of egg production and hatching success). Because of their important roles in marine ecosystems, this mechanistic understanding of how copepod populations respond to spatial and temporal temperature gradients will help us better predict their responses to climate change, and provide key insights into the future of marine ecosystemsThis 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.

Copepods是地球上最丰富的动物，在海洋食品网和生物地球化学周期中起着重要作用。海洋变暖可能会对Copepod人群产生负面影响，并在整个海洋生态系统中伴随着级联的干扰。但是，在许多地区，这种变暖是在温度季节性变化的背景下发生的。适应在这一年度温度周期中经历的不同条件可能会增加Copepod种群的遗传多样性，从而更好地使他们能够应对长期变暖。了解季节性温度波动对CopePod人群的影响将增强我们预测，计划和减轻气候变化对沿海渔业及其依赖社区的影响的能力。该项目位于佛蒙特大学，将提供与内陆状态下的海洋动物合作的机会，吸引他们可能没有机会参加海洋科学的学生。该项目将结合实地考察，实验室常见的花园实验，和种群基因组学研究季节性热适应性的流行和适应性意义，在大型纬度热梯度中占主导地位的沿海Copepod（Acartia tonsa）。这种综合方法将为热适应的基因组基础提供重要的见解，这些模式如何超过空间和时间尺度，以及季节性波动选择的潜力，使海洋copepods能够对长期变暖做出反应。该项目具有三个特定的目标：1）检查来自大纬度热梯度的地点的阿卡塔尔山脉人群中热限制的季节性变化； 2）量化和比较等位基因频率的季节性和空间变化； 3）确定季节性适应的基因型在关键适应性相关性状方面是否有所不同（热极限，体型以及卵产生和孵化成功的温度敏感性）。由于它们在海洋生态系统中的重要作用，这种对CopePod人群如何应对空间和时间温度梯度的反应的机制理解将有助于我们更好地预测他们对气候变化的反应，并为海洋生态系统的未来提供重要的见解，这反映了NSF的法定任务和法定任务和法定任务使用基金会的知识分子优点和更广泛的审查标准，通过评估被认为值得支持。