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The Evolutionary and Ecological Significance of Natural Disturbance in a New England Salt Marsh

新英格兰盐沼自然干扰的进化和生态意义

基本信息

批准号：
9420186
负责人：
John Brewer
金额：
$ 5.69万
依托单位：
Brown University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
1995
资助国家：
美国
起止时间：
1995-01-15 至 1995-12-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9420186&HistoricalAwards=false
关键词：
Evolutionary Ecological Significance Natural Disturbance

项目摘要

9420186 Brewer Ecological succession is one of the most widely studied processes in community ecology. Nonetheless, while numerous ecological models of community dynamics have been developed to explain successional responses to disturbance, very little is known about historical effects of disturbance on plant community dynamics. The main goal of the proposed research is to explore the historical effects of wrack-burial disturbance on plant community dynamics in a New England salt marsh. To do this, three experimental approaches will be employed. First, replicated wrack disturbances in three marsh areas with known differences in disturbance history will be created to test the hypothesis that marsh plants with different disturbance histories respond differently to disturbance. Secondly, disturbance history influences on intraspecific variation in clonal morphology will be quantified with common garden experiments in three co-occurring high-marsh perennial species. Third, the hypothesis that disturbance history influences the intensity of interspecific interactions will be tested with an additive series of competition experiments in the greenhouse. %%% This study will explicitly examine the importance of considering disturbance history in studying plant community dynamics and specifically will examine the role of disturbance frequency as a selective force on marsh plants. The results of this study will explore an important interface between plant population biology and community dynamics that has received surprisingly little attention.

9420186 Brewer生态演替是群落生态学中研究最广泛的过程之一。尽管如此，虽然已经开发了许多生态模型的群落动态来解释干扰的演替反应，很少有人知道的历史影响的干扰植物群落动态。拟议的研究的主要目标是探索的历史影响，在新英格兰盐沼的植物群落动态的残骸埋葬干扰。为此，将采用三种实验方法。首先，复制残骸干扰在三个沼泽地区的干扰历史的已知差异将被创建来测试的假设，沼泽植物与不同的干扰历史响应不同的干扰。其次，干扰历史的影响，种内变异的克隆形态将量化与常见的花园实验在三个共同发生的高沼泽多年生植物。第三，干扰历史影响种间相互作用强度的假设将在温室中进行一系列的竞争实验进行测试。本研究将明确研究的重要性，考虑干扰的历史，在研究植物群落动态，特别是将研究干扰频率的作用，作为一个选择力沼泽植物。这项研究的结果将探索植物种群生物学和群落动态之间的一个重要接口，令人惊讶的是，很少有人关注。