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LTREB - Understanding Food Web Complexity by Linking Long Term Data, Multiple Causes and a Spatial Approach

LTREB - 通过链接长期数据、多种原因和空间方法来了解食物网的复杂性

基本信息

批准号：
0639885
负责人：
Richard Karban
金额：
$ 29.54万
依托单位：
University of California-Davis
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2007
资助国家：
美国
起止时间：
2007-04-01 至 2014-03-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=0639885&HistoricalAwards=false
关键词：
LTREB Understanding Food Web Complexity

项目摘要

Ecologists work to understand population dynamics of important species. A common working model used by many ecologists considers food available to a focal species and the focal species as food for other species. This model has been inadequate to explain many field observations, including the 1000-fold differences in numbers of wooly bear caterpillars at Bodega Marine Reserve over the past 20 years. One possible solution is to make simple tritrophic models more realistic by including additional species interactions or by including spatial dynamics. The objective of this study is to provide a first field test of this these new models by conducting field experiments and surveys evaluating additional complexity at each trophic level. This research will evaluate the relative importance of: 1) added species at the resource (plant) level, 2) added species at the herbivore/omnivore level, and 3) movement and spatial dynamics at the predator level. Most ecological research is conducted for up to three years in a single location. A longer perspective over a larger area is essential to capture a realistic view of how and why populations change. This project will provide tests of current general theories about factors that organize and stabilize terrestrial communities. This information will allow management of undesirable species and evaluations of anthropogenic changes to useful species and ecosystems.

生态学家致力于了解重要物种的种群动态。许多生态学家使用的一个共同的工作模式认为，食物可供一个焦点物种和焦点物种作为其他物种的食物。这个模型已经不足以解释许多实地观察，包括在过去20年里，博德加海洋保护区的毛熊毛虫数量相差1000倍。一个可能的解决方案是使简单的三营养模型更现实，包括额外的物种相互作用或包括空间动态。本研究的目的是提供第一个现场测试这些新的模型进行现场实验和调查评估额外的复杂性，在每个营养级。本研究将评估：1）在资源（植物）水平上增加的物种，2）在草食动物/杂食动物水平上增加的物种，3）在捕食者水平上的运动和空间动态的相对重要性。大多数生态研究在一个地点进行长达三年。从更长的角度观察更大的区域，对于现实地了解人口变化的方式和原因至关重要。该项目将检验目前关于组织和稳定陆地群落的因素的一般理论。这些信息将有助于管理不受欢迎的物种和评估有用物种和生态系统的人为变化。