Ecological Dominant Discharge: Developing a New Concept in Stream Ecosystem Studies

生态优势流量：河流生态系统研究的新概念

基本信息

批准号：
0415365
负责人：
Martin Doyle
金额：
$ 21.4万
依托单位：
University of North Carolina at Chapel Hill
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2004
资助国家：
美国
起止时间：
2004-09-01 至 2008-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=0415365&HistoricalAwards=false
关键词：
Ecological Dominant Discharge Developing New

项目摘要

Ecological Dominant Discharge: Developing a New Concept in Stream Ecosystem Studies River discharge is a primary influence on stream ecosystems, and discharge has been substantially modified by humans via irrigation, dam operation, and climate change. These changes are known to affect the physical properties of rivers, but their ecological impacts are poorly understood. Our goal is to systematically analyze how stream ecosystem processes vary with differences in discharge, and to synthesize this information into a single metric that we call the "Ecological Dominant Discharge," which is that discharge responsible for controlling the majority of stream ecosystem processes for a given site. We will investigate this concept by studying four rivers in the Adirondack Park of upstate New York (2 dam-modified rivers, one of which has regular releases of water and 2 natural, unmodified rivers). These rivers possess a range of both physical parameters (e.g., variations in discharge) and ecological parameters (e.g., transport of particulates, etc.). The information derived from this research will be highly relevant to the management of rivers impacted by flow regulation, and for guiding potential river restoration efforts. The physical and ecological impacts of flow regulation are becoming better understood, but unifying these impacts into a single concept has been difficult in the past, and the concept of ecological dominant discharge will potentially alleviate these problems.

生态占主导地位：在河流生态系统研究中开发新概念是对河流生态系统的主要影响，并且人类通过灌溉，大坝操作和气候变化对流量进行了实质性的改变。已知这些变化会影响河流的物理特性，但是它们的生态影响知之甚少。我们的目标是系统地分析流生态系统过程如何随放电的差异而变化，并将这些信息合成为单个指标，我们称之为“生态占主导地位”，这就是负责控制给定位点的大多数流生态系统过程的排放。我们将通过研究纽约州北部阿迪朗达克公园的四条河流（2个大坝修饰的河流，其中一条有定期释放水和2条天然，未修饰的河流）来研究这个概念。这些河流具有一系列物理参数（例如，放电的变化）和生态参数（例如，颗粒的运输等）。从这项研究中得出的信息将与受流动调节影响的河流的管理高度相关，并指导潜在的河流恢复工作。流动调节的物理和生态影响已经变得更好地理解了，但是将这些影响统一到一个概念上一直很困难，生态占主导地位的概念可能会减轻这些问题。