Interannual variability in the primary and secondary productivity of the Salish Sea and its implications for juvenile salmon

萨利希海初级和次级生产力的年际变化及其对幼鲑鱼的影响

• 批准号: 554331-2020
• 负责人: Allen, Susan
• 金额: $ 3.5万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Alliance Grants
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=704245
• 关键词: Interannual; variability; primary; secondary; productivity

We propose to study the physical drivers of spatial and interannual variability in phytoplankton and zooplankton production in the Strait of Georgia in order to better understand and predict bottom-up forcing of resident and migrating salmon populations in the Salish Sea. The period after juvenile salmon transition from fresh water to the open ocean has been identified as a period of elevated vulnerability. Prey availability at that time could therefore be a determining factor in overall salmon survival. Phytoplankton growth forms the base of the food chain, and changes in phytoplankton production have the potential to cascade up the food chain to impact salmon. We will use a coupled physical-biological model to investigate mechanisms through which physical drivers affect phytoplankton productivity and the extent to which the resulting changes in phytoplankton productivity propagate up the food chain. In particular, we will seek to identify the drivers of variability in salmon prey at the times and locations most critical to salmon survival. The research plan has been developed in conjunction with the Pacific Salmon Foundation and aims to further understanding of drivers of bottom-up forcing of salmon population dynamics on the west coast of Canada through model-based experiments informed by related observational studies also supported by the Pacific Salmon Foundation. Collaboration with the Pacific Salmon Foundation brings added value to our research through a refined focus on questions bearing on salmon survival and therefore of cultural and economic importance to Canada and through the incorporation of our research in a broader network of projects on related themes, sharing data resources and rapidly communicating finds. BC salmon are iconic species of major importance for commercial, recreational, and First Nation fisheries. Despite major declines over the last decades, recreational salmon fisheries alone generate more than $1 billion annually in BC while generating more than 10,000 jobs. Rebuilding the populations to recent historic levels will thus have major economic, social, and cultural impacts.

我们建议研究佐治亚州海峡中浮游植物和浮游动物产生的空间和年际变异性的物理驱动因素，以便更好地理解和预测萨利什海中常驻和鲑鱼种群的自下而上的强迫。从淡水到开阔的鲑鱼过渡后的时期已被确定为脆弱性升高的时期。因此，当时的猎物可用性可能是总体鲑鱼存活的决定因素。浮游植物的生长构成了食物链的基础，浮游植物生产的变化有可能升级食物链以影响鲑鱼。我们将使用一个耦合的物理生物学模型来研究物理驱动因素影响浮游植物生产力的机制，以及浮游植物生产力的变化的程度可以传播食物链。特别是，我们将寻求确定在时代和最重要的鲑鱼生存期间鲑鱼猎物变异性的驱动因素。 该研究计划是与太平洋鲑鱼基金会共同制定的，旨在通过基于模型的实验得出的基于模型的实验，旨在进一步了解加拿大西海岸鲑鱼种群动态的驱动因素，该实验得到了太平洋鲑鱼基金会的支持。与太平洋鲑鱼基金会的合作通过对鲑鱼生存的问题以及对加拿大的文化和经济重要性以及通过将我们的研究纳入有关相关主题的更广泛的项目网络，共享数据资源和快速交流发现的更广泛的项目网络，从而为我们的研究带来了价值。 BC鲑鱼是商业，娱乐和第一民族渔业的标志性物种。尽管在过去的几十年中大幅下降，但仅娱乐性鲑鱼渔业每年在卑诗省产生超过10亿美元，同时产生超过10,000个工作岗位。因此，将人口重建为最近的历史水平将产生重大的经济，社会和文化影响。