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: 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=552707
• 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.

洪水是自然事件，由于其对人类财产的负面影响以及在极端情况下，公众经常被公众认为是统一的有害事件。但是洪水也可以通过影响人类对生态系统服务的影响间接受益。这项研究的目的是确定洪水对居住在河流中的鱼类和其他动物的益处和后果。 它将使用一个模型生态系统 - 艾伯塔省落基山山麓的一系列海狸池塘，以及萨斯喀彻温省河中的大型，容易发生洪水的三角洲，以测试假设该假设，即河流的浅水地区具有更高的原发性生产率，产生更大的鱼类，并且具有更长的食物链，并且比河流较长的食物链更长。预计这些好处将被较高的潜在有毒痕量元素浓度所抵消，这些元素是由于它们从土壤中解放而导致的，并腐烂了洪水的有机物。