Impacts of contaminants on aquatic ecosystems

污染物对水生生态系统的影响

• 批准号: 3036-2012
• 负责人: Metcalfe, Chris
• 金额: $ 2.4万
• 依托单位: Trent University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2014
• 资助国家: 加拿大
• 起止时间: 2014-01-01 至 2015-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=544074
• 关键词: Impacts; contaminants; aquatic; ecosystems

In Canada, our streams and rivers are impacted by a range of point sources of contaminants, including runoff from small urban centres, agriculture, golf courses and turf farm operations, and discharges of wastewater from domestic and industrial sources. The Kawartha Lakes, Ganaraska and Lake Simcoe watersheds in south-central Ontario near Trent University are a perfect natural laboratory to study the effects of agricultural land use and urban development on the release of chemical contaminants and their effects on stream communities. In this study, a team of researchers from Trent University under the supervision of Prof. Chris Metcalfe will study warm water streams in this region of Ontario to evaluate whether chemical contaminants are impairing the decomposition of organic material and nutrient cycling, and are affecting the health and development of small stream fish (i.e. darter species). If these impacts are occuring, monitoring with passive sampler devices in the streams will allow Dr. Metcalfe and his team of graduate students to identify the sources of contamination that are impacting aquatic organisms. Once the sources have been identified, regulatory agencies can implement best practices to control or mitigate the release of these contaminants, including management of riparian zones, buffer strips and wetlands, ecological restoration and treatment of wastewater. These studies are applicable to other areas of Canada where more intensive agriculture and spreading urbanization are affecting our water resources.

在加拿大，我们的溪流和河流受到一系列污染物点源的影响，包括小城市中心、农业、高尔夫球场和草坪农场的径流，以及家庭和工业废水的排放。安大略中南部靠近特伦特大学的卡瓦萨湖、加纳拉斯卡湖和西姆科湖流域是研究农业土地利用和城市发展对化学污染物释放及其对溪流群落影响的完美天然实验室。在这项研究中，特伦特大学的一组研究人员在Chris Metcalfe教授的监督下将研究安大略这一地区的温水流，以评估化学污染物是否会损害有机物质的分解和营养循环，并影响小溪鱼类（即镖鲈物种）的健康和发育。 如果这些影响正在发生，在溪流中使用被动采样器设备进行监测将使梅特卡夫博士和他的研究生团队能够确定影响水生生物的污染源。一旦确定了污染源，监管机构就可以实施最佳做法来控制或减少这些污染物的排放，包括管理河岸带、缓冲带和湿地、生态恢复和废水处理。这些研究也适用于加拿大其他地区，在这些地区，更密集的农业和不断扩大的城市化正在影响我们的水资源。