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: 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=711656
• 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.

当代和古学的方法，用于确定多种压力源对浅湖的影响 加拿大北部富裕的湖泊淡水景观提供了一系列的生态系统服务，这些服务长期以来一直被野生动植物用于其独特的水生栖息地和第一民族社区来维持传统的生活方式。但是，它们的生态完整性可能受到多种压力源的影响。不幸的是，在空间和时间上对水生生态系统条件的了解不足，严重损害了正确关联因果关系的能力，预测这些生态系统将来将如何发展，并通过资源管理者告知管理实践。这是艾伯塔省/NWT的伍德布法罗国家公园（WBNP）中湖泊丰富的淡水景观的背景。在公园的南部边缘，和平脚步三角洲（PAD）的浅湖受到气候驱动的洪水供应减少，洪水从和平和阿萨巴斯加河中供应洪水，和平河上的新水力发电开发，以及因阿塔巴斯卡油桑德斯的开发而产生的污染物污染物的潜力。在公园的北部地区，浅湖为标志性濒临灭绝的物种百日式起重机提供了关键的繁殖地面，但最近观察到的低水位阻碍了小鸡的存活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，旨在解决有关多种压力源对PAD和WBNP浅层湖生态系统水量和水质的影响的紧迫知识差距。研究将表征水文条件的状态和趋势，并确定垫湖中金属污染物的途径，分散和沉积历史，并确定控制空间和时间（季节性到衰老）变化的水文过程，WBNP的湖泊水平衡中的湖水平衡。所采用的方法将包括经过验证的，广泛的使用以及水同位素示踪剂的整合以及对湖泊沉积物核心的多参数分析，以及对人工底物收集的周围藻类金属积累的新探索。这些有针对性的研究项目将产生一系列水生生态系统组件所需的基本环境基线信息。项目将在基础和应用北部环境科学的不同领域的6个BSC，3个MSC和2名博士学位的学生提供卓越的现场和实验室培训。第一民族，政府机构和行业利益相关者为管理管理而言，调查结果将引起人们的广泛关注。