Impacts of multiple interacting stressors on the environment: Investigating the fate, transport, and dynamic relationships between contaminant and nutrient cycles

多种相互作用的压力源对环境的影响：调查污染物和营养循环之间的命运、运输和动态关系

• 批准号: RGPIN-2017-06017
• 负责人: Mundle, Scott
• 金额: $ 1.68万
• 依托单位: University of Windsor
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=634030
• 关键词: Impacts; multiple; interacting; stressors; environment

Water quality issues that lead to freshwater eutrophication are a rapidly intensifying global concern and the recent increase in eutrophic conditions in the Great Lakes has gained international attention. Elemental cycles, carbon regimes and metabolic processes are changing and we have little insight into the long-term effect these changes will have on large lake systems. The Great Lakes account for over 85% of North America’s freshwater supply and have had a history of water quality problems that peaked in the early 1970’s with cultural eutrophication in Lake Erie. Phosphate inputs were identified as a critical factor causing eutrophication that stimulated changes in environmental policies that led to a decline in eutrophication through to the 1990’s. However, recent rises in cyanobacteria blooms provide evidence for the re-eutrophication of Lake Erie. Despite many coordinated efforts that attempt to link eutrophication to phosphorus dynamics, it is becoming clear that the magnitude and complexity of this issue has moved beyond a simple phosphate-limited mechanism.

导致淡水富营养化的水质问题是一个迅速加剧的全球关切，最近五大湖富营养化情况的增加已引起国际注意。元素循环、碳体系和代谢过程正在发生变化，我们对这些变化对大型湖泊系统的长期影响知之甚少。五大湖占北美淡水供应的85%以上，并且有过水质问题的历史，在20世纪70年代早期伊利湖的文化富营养化达到顶峰。磷酸盐的投入被认为是造成富营养化的一个关键因素，它刺激了环境政策的变化，导致富营养化的减少，一直持续到1990年代。然而，最近蓝藻繁殖的增加为伊利湖的再富营养化提供了证据。尽管许多协调努力试图将富营养化与磷动态联系起来，但越来越清楚的是，这个问题的严重性和复杂性已经超出了简单的磷酸盐限制机制。