From aquatic food webs to our tables: the influence of exotic invasion on nutritional provisioning and contaminants in sport fish

从水生食物网到我们的餐桌：外来入侵对运动鱼营养供给和污染物的影响

• 批准号: 550472-2020
• 负责人: Derry, Alison
• 金额: $ 1.82万
• 依托单位: Université du Québec à Montréal
• 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=701415
• 关键词: aquatic; food; webs; our; tables

The project goal is to integrate food web analytical tools and ecosystem modelling to understand the trophic role of the invasive round goby fish on aquatic food web quality and Hg bioaccumulation in the St. Lawrence River (SLR). The project is a partnership with the St. Lawrence River Institute of Environmental Sciences ('The River Institute'; non-government organisation) and it will train 1 PhD student + several BSc students. We will address the ecosystem-level problem in the Upper SLR using food web tracers: stable isotopes, fatty acids, and MeHg trophic transfer, at 8 trophic levels of the food web per site, across 9 to 30 sites. These metrics will be measured at sites that span spatial environmental gradients in dissolved organic carbon, nutrients, and invasion load across three fluvial lakes of the Upper SLR (Lake St. Francis, Lac St. Louis, et Lac des Deux Montagnes), and will be related with round goby invasion. In Lake St. Francis, ecosystem models will be applied to address how dressenid mussel and round goby invasion have modified the biological and physicochemical properties from primary producers to aquatic birds, using both historical and contemporary data. The partner will provide expertise and infrastructural support on fish ecology and mercury transfer in the food web, as well as share historical data on the eastern Ontario section of Lac St. Francis. The Upper SLR has an economically important sportfish industry, and the Alliance research project will provide information about how the interplay of multiple stressors plays out for contaminant loads and fitness of sportfish in this ecosystem. The research outcomes will strengthen community partnership of The River Institute with founders of the organisation and core stakeholders in the SLR, such as The Mohawks of Akwesasne. More generally, the project will provide insight into how the interplay of exotic invasion and other environmental stressors play out for contaminant loads and nutrient provisioning of sportfish for people. The Alliance research project could impact government policy on guidelines for sportfish consumption for balancing the risks of mercury exposure with the benefits of nutritional provisioning in the Great Lakes and the SLR.

项目目标是整合食品网络分析工具和生态系统建模，以了解侵入性圆形戈比鱼在圣劳伦斯河（SLR）中的水生食物网质量和汞生物蓄积的营养作用。该项目是与圣劳伦斯河环境科学研究所（“河流研究所”；非政府组织）的合作伙伴关系，它将培训1名博士生 +几位BSC学生。我们将使用食物网示踪剂：稳定的同位素，脂肪酸和MEHG营养转移，在9至30个地点，每个位置的营养水平8个营养水平，我们将使用食物网络示踪剂：稳定的同位素，脂肪酸和MEHG营养转移。这些指标将在溶解的有机碳，养分和入侵载荷的地点（在上slr的三个河流湖泊（St. Francis，Lac St. Louis等湖等）中跨越空间环境梯度的地点，并将与Round Goby Invisaion相关。在圣弗朗西斯湖中，将使用历史和现代数据，将生态系统模型用于解决Gressenid Mussel和Round Goby入侵如何将生物和物理化学特性从主要生产者到水生鸟类的生物化学特性。合作伙伴将在食品网中提供有关鱼类生态和汞转移的专业知识和基础设施支持，并在Lac St. Francis的东部安大略省分享历史数据。上SLR具有经济上重要的Sportfish行业，联盟研究项目将提供有关多种压力源的相互作用的信息，以在该生态系统中为Sportfish的污染物负载和适应性发挥作用。研究成果将加强与组织的创始人以及SLR中的核心利益相关者（例如Akwesasne的莫霍克人）的社区伙伴关系。更普遍的是，该项目将提供有关外来入侵的相互作用和其他环境压力源如何为人们提供污染物的负载和养分供应。联盟研究项目可能会影响政府对Sportfish消费指南的政策，以平衡汞暴露的风险与大湖区和SLR中营养供应的好处。