Expanding the silverside system to quantify how climate gradients determine co- and countergradient adaptation strength in the ocean

扩展 Silverside 系统以量化气候梯度如何确定海洋中的同梯度和反梯度适应强度

• 批准号: 2313288
• 负责人: Hannes Baumann
• 金额: $ 47.26万
• 依托单位: University of Connecticut
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-08-15 至 2026-07-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2313288&HistoricalAwards=false
• 关键词: Expanding; silverside; system; quantify; how

Many species have evolved adaptations to latitudinal climate gradients and studying these sheds light on how species will evolve in response to global climate change. To investigate adaptation in Chilean silversides, offspring of wild fish from four locations along the Chilean coast are being reared at four common temperatures. Differences in growth rates, vertebral number, and mercury uptake among populations from different latitudes indicate genetic differences due to local adaptation. The research team is integrating these Chilean silverside data with prior data from northern hemisphere silverside species to better understand the relationship between climate gradient strength and adaptation strength. This project provides training for two graduate students through a US-Chile graduate cross-cultural exchange. The research is being integrated into graduate and undergraduate courses taught in Chile and the research team is sharing the results with the public through a website and magazine articles. This project advances understanding of two forms of local adaptation, co-gradient variation (CoGV) and counter-gradient variation (CnGV), which underlie adaptation to large-scale, latitudinal climate gradients. Using a common garden experiment, the team is examining the relationship between temperature and genetic variation in Chilean silversides. Newly-fertilized offspring obtained from wild founders at four locations along the Chilean coast are being reared at four common temperatures to a common juvenile size. Differences among populations in trait measurements (growth capacity, vertebral number, and total mercury concentration) to test the hypotheses that 1) growth capacity increases with temperature and latitude (CnGV) and 2) vertebral number increases with latitude (CoGV). These data are being integrated with existing evidence from northern hemisphere silverside species to determine if there is a relationship between CnGV/CoGV strength and latitudinal gradient strength.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.

许多物种已经发展到纬度气候梯度的适应性，并研究了这些棚子，阐明了物种如何响应全球气候变化。为了调查智利银色的适应性，从智利海岸四个地点的野生鱼的后代正在四个常见的温度下饲养。来自不同纬度的人群之间的生长速率，椎数和汞吸收的差异表明由于局部适应性而引起的遗传差异。研究团队正在将这些智利银色数据与北半球银色物种的先前数据相结合，以更好地了解气候梯度强度和适应强度之间的关系。 该项目通过美国智利研究生跨文化交流为两名研究生提供培训。这项研究正在智利教授的研究生和本科课程中，研究团队正在通过网站和杂志文章与公众分享结果。该项目推进了对两种形式的局部适应性，共同梯度变化（COGV）和反梯度变化（CNGV）的理解，这些变化是对大规模的纬度气候梯度的适应性的。使用常见的花园实验，该团队正在研究智利银色的温度与遗传变异之间的关系。从智利海岸的四个地点获得的新繁殖的后代正在以四个常见温度饲养到常见的少年大小。性状测量中人群之间的差异（生长能力，椎骨数和汞浓度）测试假设，即1）生长能力随温度和纬度（CNGV）和2）随着纬度（COGV）的增加而增加（CNGV）和2）。这些数据已与北半球银色物种的现有证据集成在一起，以确定CNGV/COGV强度与纬度梯度强度之间是否存在关系。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支持的。