Collaborative Research: Recovery of Ecosystem Structure and Function Following Exotic Species Eradication

摘要/ abstract摘要：landknapp DEB 0075448和orlando Sarnelle DEB 0075509合作研究：外来物种灭绝后生态系统结构和功能的恢复本研究旨在探讨生态系统如何响应外来物种的灭绝而非入侵。具体地说，本提案研究了根除外来鳟鱼后，加州内华达山脉高山湖泊系统的恢复。PI将询问，在外来鱼类被清除后，高山湖泊的原生脊椎动物和无脊椎动物物种是否会返回。在一项长期的全湖试验中，已经成功地从三个实验湖中移走了外来鱼类，同时在三个对照湖中继续放养鱼类。对这六个湖泊的动物群落的监测将继续进行，监测始于1996年鱼类灭绝之前，以确定恢复的速度，并更好地了解促进或阻碍恢复的物种的生活史属性。项目负责人还将研究物种组合的变化如何影响高山湖泊生态系统的功能。他们将继续对全湖实验进行湖沼学监测，以评估除鱼后营养物和藻类生物量的变化。研究结果对全球水生生态系统的恢复具有重要意义。

ABSTRACTRoland Knapp DEB 0075448andOrlando Sarnelle DEB 0075509Collaborative Research: Recovery of Ecosystem Structure and FunctionFollowing Exotic Species EradicationThe proposed research examines how ecosystems respond, not to invasion, but to the elimination of an exotic species. Specifically, this proposal examines the recovery of alpine lake systems in the Sierra Nevada, California, after the eradication of exotic trout. The PI's will ask whether vertebrate and invertebrate species native to alpine lakes return after the removal of exotic fish. A long-term whole-lake experiment will be used in which exotic fish have been successfully removed from three experimental lakes, while fish stocking continues in three control lakes. Monitoring of faunal assemblages in these six lakes, monitoring begun in 1996 before fish eradication, will continue in order to determine the rate of recovery and to better understand the life history attributes of species that facilitate or hinder recovery. The PI's will also ask how changes in species assemblages influence the functioning of alpine lake ecosystems. They will continue limnological monitoring of the whole-lake experiment to evaluate changes in nutrients and algal biomass following fish removal. The results of this study have important implications for the restoration of aquatic ecosystems worldwide.