Contemporary and paleolimnological approaches for determining effects of multiple stressors on shallow northern lakes

确定多种压力因素对北部浅湖影响的当代和古湖泊学方法

• 批准号: RGPIN-2017-05462
• 负责人: Wolfe, Brent
• 金额: $ 1.6万
• 依托单位: Wilfrid Laurier University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=678635
• 关键词: Contemporary; paleolimnological; approaches; determining; effects

Contemporary and Paleolimnological Approaches for Determining Effects of Multiple Stressors on Shallow Northern Lakes******Lake-rich freshwater landscapes in northern Canada provide an array of ecosystem services that have long been utilized by wildlife for their unique aquatic habitat and by First Nation communities to sustain traditional ways of life. Their ecological integrity, however, may be affected by multiple stressors. Unfortunately, insufficient knowledge of aquatic ecosystem conditions over space and time severely impairs ability to correctly associate cause and effect, anticipate how these ecosystems will evolve in the future, and inform stewardship practices by resource managers. This is the context for lake-rich freshwater landscapes in Wood Buffalo National Park (WBNP), Alberta/NWT. At the southern margin of the Park, shallow lakes of the Peace-Athabasca Delta (PAD) are threatened by climate-driven diminishing supply of floodwater from the Peace and Athabasca rivers, new hydroelectric development on the Peace River, and by the potential for contaminant loading from development of the Athabasca oilsands. In the northern sector of the Park, shallow lakes provide critical breeding ground for Whooping Crane, an iconic endangered species, but recently observed low water levels hamper chick survival and increase predator access.******The NSERC DG program will support several coordinated research projects designed to address pressing knowledge gaps on the influence of multiple stressors on the water quantity and water quality of shallow lake ecosystems of the PAD and WBNP. Research will characterize status and trends of hydrological conditions and determine pathways, dispersal, and depositional history of metal contaminants in lakes of the PAD, and identify hydrological processes that control spatial and temporal (seasonal to decadal) variations in lake water balances in the Whooping Crane habitat region of WBNP. Methods employed will include proven, extensive use, and integration of water isotope tracers and multi-parameter analysis of lake sediment cores, as well as novel exploration of metal accumulation in periphytic algae collected on artificial substrates. These targeted research projects will generate fundamental environmental baseline information required for a range of aquatic ecosystem components. Projects will provide exceptional field and laboratory training for 6 BSc, 3 MSc, and 2 PhD students in diverse areas of basic and applied northern environmental science. Findings will be of broad interest to First Nation, government agency, and industry stakeholders for informing stewardship.

确定多种压力源对北部浅湖影响的当代和古湖泊学方法******加拿大北部湖泊丰富的淡水景观提供了一系列生态系统服务，长期以来，野生动物一直利用这些生态系统作为其独特的水生栖息地，原住民社区也利用这些生态系统来维持传统的生活方式。然而，它们的生态完整性可能受到多种压力因素的影响。不幸的是，随着时间和空间的变化，对水生生态系统状况的认识不足严重损害了正确联系因果关系的能力，预测这些生态系统未来将如何演变，并为资源管理者的管理实践提供信息。这是阿尔伯塔/西北地区伍德布法罗国家公园（WBNP）湖泊丰富的淡水景观的背景。在公园的南缘，和平-阿萨巴斯卡三角洲（PAD）的浅水湖泊受到气候驱动的和平河和阿萨巴斯卡河洪水供应减少、和平河上的新水电开发以及阿萨巴斯卡油砂开发带来的潜在污染物的威胁。在公园的北部，浅湖为标志性的濒危物种——鸣鹤提供了重要的繁殖地，但最近观察到的低水位阻碍了雏鸟的生存，并增加了捕食者的进入。****** NSERC DG计划将支持几个协调的研究项目，旨在解决多个压力源对PAD和WBNP浅湖生态系统水量和水质影响的紧迫知识缺口。研究将描述水文条件的现状和趋势，确定PAD湖泊中金属污染物的途径、扩散和沉积历史，并确定控制WBNP白鹤栖息地区域湖泊水平衡时空（季节到年代际）变化的水文过程。所采用的方法将包括经过验证的、广泛使用的、整合的水同位素示踪剂和湖泊沉积物岩心的多参数分析，以及在人工基质上收集的周围植物藻类中金属积累的新探索。这些有针对性的研究项目将产生一系列水生生态系统组成部分所需的基本环境基线信息。项目将为6名学士、3名硕士和2名博士在基础和应用北方环境科学的不同领域提供特殊的现场和实验室培训。调查结果将对第一民族、政府机构和行业利益相关者广泛感兴趣，为管理提供信息。