Collaborative Research: Response of marine copepods to warming temperature and ocean acidification

合作研究：海洋桡足类对气温升高和海洋酸化的响应

• 批准号: 1559180
• 负责人: Hans Dam
• 金额: $ 50.97万
• 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: 2016
• 资助国家: 美国
• 起止时间: 2016-06-01 至 2021-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1559180&HistoricalAwards=false
• 关键词: Collaborative; Research; Response; marine; copepods

Over time, our oceans are becoming both warmer and higher dissolved carbon dioxide. The latter condition is called ocean acidification. The consequences of these simultaneous changes for populations of marine organisms are not well understood. For this project, the investigators will conduct a series of laboratory experiments to determine how two closely-related, common species of Acartia copepods will respond to the interactive effects of warming and acidification and also how well these species can adapt over multiple generations to changing ocean conditions. Since these copepods are key species in coastal food webs, results will have important implications for understanding and predicting how marine ecosystems may respond to future climate change. The investigators will share results from the research through traditional print media, case studies, and video mini lectures. The goal will be for educators of all levels to easily access material on climate change and ocean acidification to include in teaching curricula, in alignment with recommendations for universal design for learning. The project is a collaborative effort between an established professor at the University of Connecticut and an early-career female scientist at the University of Vermont. It will provide training and opportunities for collaborative, interdisciplinary research for two postdoctoral investigators, two graduate students and an undergraduate student.The project's main goals are: 1) to test the simultaneous effects of temperature and carbon dioxide under current and future conditions on life history traits throughout the life cycle for two key copepod species, warm-adapted Acartia tonsa and cold-adapted Acartia hudsonica; 2) to test for adaptive capacity of both copepod species to a warmer and carbon-dioxide-enriched ocean; 3) to measure the genetic and maternally-induced changes across multiple generations of experimental selection in future conditions in both copepod species, and to identify the genes and pathways responding to selection. The investigators will use experiments encompassing current and projected temperature and carbon-dioxide conditions, will determine the roles of each variable and their interaction on traits that affect the fitness of both copepod species. They will also determine which life stages are most sensitive to individual or simultaneous stress conditions. Through multigenerational selection experiments, the investigators will identify and characterize the mechanisms of copepod evolutionary adaptation. Finally, they will measure genomic changes across the generations under all four experimental conditions to quantify the relative contributions of genetic and maternally-induced change in the physiological and life history traits of copepods in response to near-future climate conditions.

随着时间的推移，我们的海洋变得越来越温暖，溶解的二氧化碳也越来越多。后一种情况称为海洋酸化。这些同时发生的变化对海洋生物种群造成的后果尚不清楚。在这个项目中，研究人员将进行一系列实验室实验，以确定两种密切相关的常见 Acaria 桡足类物种将如何应对变暖和酸化的相互作用影响，以及这些物种在多代的过程中如何适应不断变化的海洋状况。由于这些桡足类动物是沿海食物网中的关键物种，因此研究结果将对理解和预测海洋生态系统如何应对未来气候变化产生重要影响。研究人员将通过传统印刷媒体、案例研究和视频迷你讲座分享研究结果。目标是让各级教育工作者能够轻松获取有关气候变化和海洋酸化的材料，并将其纳入教学课程，与通用学习设计的建议保持一致。该项目是康涅狄格大学一位知名教授和佛蒙特大学一位早期职业女性科学家之间的合作成果。它将为两名博士后研究员、两名研究生和一名本科生提供跨学科合作研究的培训和机会。该项目的主要目标是：1）测试当前和未来条件下温度和二氧化碳对生命史的同时影响两种主要桡足类物种（适应温暖的 Acaria tonsa 和冷适应的 Acaria hudsonica）整个生命周期的特征； 2) 测试两种桡足类物种对变暖和富含二氧化碳的海洋的适应能力； 3）测量两种桡足类物种在未来条件下的多代实验选择中遗传和母体诱导的变化，并确定响应选择的基因和途径。研究人员将使用涵盖当前和预计温度和二氧化碳条件的实验，确定每个变量的作用及其对影响两种桡足类物种适应性的性状的相互作用。他们还将确定哪些生命阶段对个人或同时发生的压力条件最敏感。通过多代选择实验，研究人员将识别并表征桡足类进化适应机制。最后，他们将在所有四种实验条件下测量各代基因组的变化，以量化遗传和母体诱导的变化对桡足类生理和生活史特征的相对贡献，以应对近期的气候条件。