权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

CRB: Experimentation in Restoration Ecology: The Role of Habitat Heterogeneity in Stream Ecosystems

CRB：恢复生态学实验：栖息地异质性在溪流生态系统中的作用

基本信息

批准号：
9622288
负责人：
Margaret Palmer
金额：
$ 21万
依托单位：
University of Maryland, College Park
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
1996
资助国家：
美国
起止时间：
1996-04-15 至 2001-03-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9622288&HistoricalAwards=false
关键词：
CRB Experimentation Restoration Ecology Role

项目摘要

We propose to identify the physical and biological mechanisms responsible for restoration of damaged streams. Specifially, we will determine whether an increase in the diversity of physical habitat types on a streambed promotes restoration of a stream ecosystem following a perturbation. Further, we will assess how flooding interacts with habitat diversity to impede or promote ecosystem recovery following damage. We will physically partition multiple sections of a stream into paired halves (one control and one restoration treatment), disturb treatment halves, and then alter the size and complexity of the streambed substrate in the treatments halves. We will measure physical and biological responses to the disturbance and to the restoration treatments, and determine when and how the disturbed sections "recover." Recovery will be estimated as the similarity between biological diversity and ecosystem function in control and treatment sections of the stream. This experiment mimics restoration methods currently used by state and national environmental management groups. These methods have never been evaluated scientifically to determine if (and why) they enhance restoration of damaged stream ecosystems. Our experiment will also test a central ecological question of broad relevance to environmental science: does increasing physical habitat diversity enhance species diversity and ecosystem function? ??

我们建议确定恢复受损溪流的物理和生物机制。具体来说，我们将确定河床上自然栖息地类型多样性的增加是否会促进扰动后河流生态系统的恢复。此外，我们将评估洪水如何与栖息地多样性相互作用，以阻碍或促进生态系统在破坏后的恢复。我们将把河流的多个部分物理划分为成对的两部分（一个控制处理和一个恢复处理），干扰处理一半，然后改变处理一半中河床基质的大小和复杂性。我们将测量对干扰和恢复处理的物理和生物反应，并确定受干扰部分何时以及如何“恢复”。恢复将被估计为河流控制区和处理区生物多样性和生态系统功能之间的相似性。这个实验模拟了州和国家环境管理组织目前使用的恢复方法。这些方法从未被科学地评估过，以确定它们是否（以及为什么）能促进受损河流生态系统的恢复。我们的实验还将测试一个与环境科学广泛相关的核心生态问题：增加自然栖息地多样性是否会增强物种多样性和生态系统功能？？?