A zoogeographic analysis of the thermal and feeding ecology of Arctic charr: implications for climate change

北极红点鲑的热生态和摄食生态的动物地理学分析：对气候变化的影响

• 批准号: 155928-2010
• 负责人: Power, Michael
• 金额: $ 2.48万
• 依托单位: University of Waterloo
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2013
• 资助国家: 加拿大
• 起止时间: 2013-01-01 至 2014-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=522683
• 关键词: zoogeographic; analysis; thermal; feeding; ecology

Research work proposed here will focus on two key Canadian fish species, Arctic charr and Atlantic salmon, iconic in their respective regions and both considered useful indicators of ecosystem change. Arctic charr and their ecosystems are projected to experience many serious climate change impacts that will directly affect charr biology at many levels and alter Arctic charr habitats, with follow-on indirect consequences expected to compound the direct biological effects and cascade to create substantive impacts on important northern charr fisheries. Preparedness to meet the challenges of climate change in the north are currently hampered by a critical lack of knowledge about the mechanisms by which climate effects (e.g., increased temperatures) are transmitted to Arctic charr and the ability of charr to 'adapt'. Research here will address the identified knowledge gaps by focusing on [1] continued development of the analytical tools necessary for the accurate reconstruction of Arctic charr thermal histories from which [2] relationships between growth and environmental variation may be deduced. Studies will be conducted in a number of northern locations along a north-south gradient, including: Ellesmere and Baffin Islands, Nunavik (northern Quèbec) and Nunatsiavut (Labrador). Although much studied, little is known about the marine ecology of Atlantic salmon. Throughout much of the geographic range for salmon, an element known to affect survival and recruitment is the influence of marine temperature on growth. Relationships among temperature, growth and ration suggest an extension of the marine temperature-growth linkage established for salmon would be improved understanding of marine feeding patterns. To that end, this research will also seek to characterize stock-specific and life-stage differences in marine feeding patterns and thermal habitat use in salmon using cutting-edge stable isotope methods. For both species the acquired information will improve understanding of functional biological relationships, thereby permitting improved understanding of the implications of ecosystem change and improved science-based stewardship of affected populations.

此处提出的研究工作将重点介绍两个关键的加拿大鱼类，即北极Charr和大西洋鲑鱼，这是其各自地区的标志性，并且都被认为是生态系统变化的有用指标。预计北极Charr及其生态系统将经历许多严重的气候变化影响，这些影响将直接影响Charr生物学，并改变北极Charr栖息地，并有望将直接的生物学影响和级联造成实质性影响，从而对重要的北方渔业产生实质性影响。目前，迫切缺乏对气候影响（例如，温度升高）传播到北极Charr以及Charr的能力“适应”的机制的批评以及Charr的能力。这里的研究将通过关注[1]的持续开发北极Charr热历史所必需的分析工具来解决确定的知识差距，从而可以从中推导出生长与环境变化之间的[2]之间的关系。研究将在许多南北梯度中进行，包括：Ellesmere和Baffin群岛，Nunavik（北奎贝克）和Nunatsiavut（Labrador）。尽管研究了很多，但对大西洋鲑鱼的海洋生态知之甚少。通过鲑鱼的大部分地理范围，已知影响生存和募集的元素是海洋温度对生长的影响。温度，生长和配给之间的关系表明，为鲑鱼建立的海洋温度增长连接的扩展将提高人们对海洋进食模式的理解。为此，这项研究还将试图使用尖端稳定的同位素方法来表征鲑鱼饲养模式中股票特异性和生命阶段差异。对于这两种物种，获得的信息都将提高对功能生物学关系的理解，从而提高人们对生态系统变化含义的理解，并改善了受影响人群的基于科学的管理。