Ocean Acidification Category 1: Identifying Adaptive Responses of Polar Fishes in a Vulnerable Ecosystem

海洋酸化类别 1：确定脆弱生态系统中极地鱼类的适应性反应

• 批准号: 1040945
• 负责人: Sean Place
• 金额: $ 62.87万
• 依托单位: University South Carolina Research Foundation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-05-01 至 2014-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1040945&HistoricalAwards=false
• 关键词: Ocean; Acidification; Category; Identifying; Adaptive

The proposed research will investigate the interacting and potentially synergistic influence of two oceanographic features - ocean acidification and the projected rise in mean sea surface temperature - on the performance of Notothenioids, the dominant fish of the Antarctic marine ecosystem. Understanding the joint effects of acidification and temperature rise on these fish is a vital component of predicting the resilience of coastal marine ecosystems. Notothenioids have repeatedly displayed a narrow window of physiological tolerances when subjected to abiotic stresses. Given that evolutionary adaptation may have led to finely-tuned traits with narrow physiological limits in these organisms, this system provides a unique opportunity to examine physiological trade-offs associated with acclimation to the multi-stressor environment expected from future atmospheric CO2 projections. Understanding these trade-offs will provide valuable insight into the capacity species have for responses to climate change via phenotypic plasticity. As an extension to functional measurements, this study will use evolutionary approaches to map variation in physiological responses onto the phylogeny of these fishes and the genetic diversity within species. These approaches offer insight into the historical constraints and future potential for evolutionary optimization. The research will significantly expand the genomic resources available to polar researchers and will support the training of graduate students and a post doc at an EPSCoR institution. Research outcomes will be incorporated into classroom curriculum.

拟议的研究将调查海洋酸化和平均海面温度预计上升这两个海洋学特征对南极海洋生态系统的主要鱼类Notothenioids的表现的相互作用和潜在的协同影响。了解酸化和温度上升对这些鱼类的联合影响是预测沿海海洋生态系统恢复能力的重要组成部分。当受到非生物胁迫时，Notothenioids 多次表现出狭窄的生理耐受性。鉴于进化适应可能导致这些生物体产生具有狭窄生理限制的微调特征，该系统提供了一个独特的机会来检查与适应未来大气二氧化碳预测所预期的多压力环境相关的生理权衡。了解这些权衡将为了解物种通过表型可塑性应对气候变化的能力提供有价值的见解。作为功​​能测量的延伸，这项研究将使用进化方法将生理反应的变化映射到这些鱼类的系统发育和物种内的遗传多样性上。这些方法提供了对进化优化的历史限制和未来潜力的洞察。该研究将显着扩大极地研究人员可用的基因组资源，并将支持 EPSCoR 机构的研究生和博士后培训。研究成果将纳入课堂课程。