Species Turnover, Trophic Coupling and Life History Tradeoffs: Plankton Food Web Structure Along a Gradient of Lake Size/Depth

物种更替、营养耦合和生活史权衡：沿湖泊大小/深度梯度的浮游生物食物网结构

• 批准号: 9726555
• 负责人: Alan Tessier
• 金额: $ 25万
• 依托单位: Michigan State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-06-01 至 2002-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9726555&HistoricalAwards=false
• 关键词: Species; Turnover; Trophic; Coupling; Life

Tessier 9726555 A substantial amount of current ecological work focuses on the interfaces between population, community and ecosystem ecology. One focus within this area consider how food-web structure interacts with abiotic features of the environment. This proposal would explore these features by considering community structure characteristics systematically along a gradient of lake forms that exhibit substantial differences in their basin features with consequent differences in physico-chemical features and the occurrence of fishes, a major player in lake food webs. In temperate zone lakes with warm-water fisheries, lake size and depth strongly regulate the types of fishes that are present within a basin. Environmental stress is more common in smaller water bodies to the extent that fishes are excluded from shallow or small basins. Fishes have been shown to have controlling influences over lake food webs and shifts in suspension-feeding zooplankton and their food sources can be expected with changes in fishes. This work would involve a systematic comparison of how food-web structure and trophic coupling change along a gradient of lake size and depth. Investigation will combine comparative data and experiments along the lake gradient to evaluate interactions between habitat and food-web characteristics. It would specifically examine the nature of heterogeneity within the suspensio-feding zooplankton and their resource assemblages. The ultimate goal of this project is to integrate considerations of life-history strategies into food-web, and ultimately ecosystem-process evaluations.

目前大量的生态学工作集中在种群、群落和生态系统生态学之间的界面。该领域的一个重点是考虑食物网结构如何与环境的非生物特征相互作用。该提案将通过系统地考虑湖泊形态梯度的群落结构特征来探索这些特征，这些湖泊形态在流域特征上表现出实质性的差异，从而在物理化学特征和鱼类（湖泊食物网的主要参与者）的出现方面存在差异。在拥有温水渔业的温带湖泊中，湖泊的大小和深度强烈地调节着盆地内存在的鱼类类型。环境压力在较小的水体中更为常见，以至于鱼类被排除在浅水或小盆地之外。鱼类已被证明对湖泊食物网具有控制性影响，悬浮性浮游动物及其食物来源的变化可以通过鱼类的变化来预测。这项工作将包括系统地比较食物网结构和营养耦合如何沿着湖泊大小和深度的梯度变化。调查将结合湖泊梯度的比较数据和实验来评估栖息地和食物网特征之间的相互作用。它将特别研究悬浮食性浮游动物及其资源组合的异质性性质。该项目的最终目标是将生活史策略的考虑整合到食物网中，并最终进行生态系统过程评估。