Ecological benefits and toxicological consequences of flooding in river ecosystems

河流生态系统洪水的生态效益和毒理学后果

• 批准号: 434943-2013
• 负责人: Jardine, Timothy
• 金额: $ 1.97万
• 依托单位: University of Saskatchewan
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2016
• 资助国家: 加拿大
• 起止时间: 2016-01-01 至 2017-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=596638
• 关键词: Ecological; benefits; toxicological; consequences; flooding

Floods are natural events that are often perceived by the public as uniformly harmful because of their negative effects on human property and in extreme cases, human life. But floods can also indirectly benefit humans via their influence on ecosystem services. The goal of this research is to determine the benefits and consequences of flooding for fish and other animals that live in rivers. It will use a model ecosystem - a series of beaver ponds in the Rocky Mountain foothills of Alberta - and a large, flood-prone delta in the Saskatchewan River to test the hypothesis that shallow, flooded areas of the river have higher rates of primary productivity, produce more and larger fish and have longer food chains than free-flowing sections of the river. These benefits are expected to be offset by higher concentrations of potentially toxic trace elements that result from their liberation from soils and decaying organic matter by floodwaters.

洪水是一种自然事件，通常被公众认为是有害的，因为它们对人类财产甚至在极端情况下对人类生命产生负面影响。但洪水也可以通过对生态系统服务的影响来间接造福人类。这项研究的目的是确定洪水对河流中的鱼类和其他动物的好处和后果。它将使用一个模型生态系统——阿尔伯塔省落基山山麓的一系列海狸池塘——以及萨斯喀彻温河中一个容易发生洪水的大型三角洲，来检验河流浅水淹没区初级生产力较高的假设。 ，与河流自由流动的河段相比，生产更多、更大的鱼类，并且拥有更长的食物链。这些好处预计会被较高浓度的潜在有毒微量元素所抵消，这些微量元素是由于洪水从土壤中释放出来的以及腐烂的有机物而产生的。