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: 2021
• 资助国家: 加拿大
• 起止时间: 2021-01-01 至 2022-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=721254
• 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.

该项目的目标是整合食物网分析工具和生态系统建模，以了解入侵性圆虾虎鱼对圣劳伦斯河水生食物网质量和汞生物累积的营养作用。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，它将培养1名博士生+几名理学士学生。我们将解决生态系统层面的问题，在上SLR使用食物网示踪剂：稳定同位素，脂肪酸和甲基汞营养转移，在8个营养级的食物网每个网站，在9至30个网站。这些指标将在跨越溶解有机碳、营养物和入侵负荷的空间环境梯度的地点进行测量，这些环境梯度跨越了上SLR的三个河流湖泊（圣弗朗西斯湖、圣路易斯湖和双蒙塔涅湖），并将与圆虾虎鱼入侵有关。在弗朗西斯湖，生态系统模型将应用于解决如何dressenid贻贝和圆虾虎鱼入侵修改了生物和物理化学特性从初级生产者到水生鸟类，使用历史和当代数据。该合作伙伴将提供关于鱼类生态和食物网中汞转移的专门知识和基础设施支持，并分享关于弗朗西斯湖东部安大略段的历史数据。上SLR有一个经济上重要的运动鱼产业，联盟的研究项目将提供有关多个压力源的相互作用如何发挥污染物负荷和运动鱼在这个生态系统中的适应性的信息。研究成果将加强河流研究所与该组织创始人和SLR核心利益相关者（如Akwesasne的Mohawks）的社区伙伴关系。更一般地说，该项目将深入了解外来入侵和其他环境压力因素的相互作用如何影响污染物负荷和人们对运动鱼类的营养供应。联盟的研究项目可能会影响政府关于运动鱼消费准则的政策，以平衡汞接触的风险与五大湖和SLR营养供应的好处。