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? ??

我们建议确定负责恢复受损流的物理和生物学机制。特异性地，我们将确定流床上物理栖息地类型的多样性是否会促进扰动后流生态系统的恢复。此外，我们将评估洪水与栖息地多样性相互作用，以阻碍或促进损害后的生态系统恢复。我们将将流的多个部分分为多个部分（一个对照和一种恢复处理），干扰治疗的两半，然后改变处理两半中流床底物的大小和复杂性。我们将衡量对干扰和恢复处理的物理和生物学反应，并确定何时以及如何“恢复”。恢复将被估计为生物多样性与生态系统功能之间的相似性在流的对照和治疗部分中。该实验模仿了州和国家环境管理小组目前使用的恢复方法。从未对这些方法进行科学评估，以确定（以及为什么）是否会增强受损流生态系统的恢复。我们的实验还将检验与环境科学广泛相关性的中心生态问题：增加的物理栖息地多样性是否可以增强物种多样性和生态系统功能？？