PECASE: Exploring Population Persistence and Community Assembly Through "Resurrection Ecology"

提案标题：PECASE：通过“复活生态学”探索种群持久性和社区集会机构：伊利诺伊大学香槟分校多曼特浮游动物卵在湖泊沉积物中大量积累，在那里它们可以存活几个世纪。当蛋被从湖里移出并孵化出来时，它们提供了与过去群落的活联系。伊利诺伊州朱砂公司的几十个湖泊是在过去一个世纪内通过露天采矿形成的，我将利用这些湖泊来解决不同因素如何影响种群的持续能力，从而影响水生群落的发展的问题。我会取延伸到每个湖形成的沉积物岩心。这为研究种群灭绝的原因提供了一个独特的机会，因为核心中包含的卵显示了浮游动物的整个殖民历史，并展示了随着时间的推移物种更替的模式。其中许多休眠卵可以孵化，使我能够使用多个种群的大型水蚤来研究种群内(遗传多样性、生活史变异)与种群之间(竞争、捕食)过程在决定物种组成随时间变化方面的相对重要性。作为教育部分的一部分，我将为小学教师编写一份手册，其中将包括位于州立公园的湖泊自助实地考察活动。该项目最初是作为职业奖而资助的，并于2004年9月转变为总统工程师和科学家早期职业奖(PECASE)奖。

Proposal Title: PECASE: Exploring Population Persistence and CommunityAssembly Through "Resurrection Ecology"Institution: University of Illinois at Urbana-ChampaignDormant eggs of zooplankton accumulate in large numbers in lake sediments, where they can remain viable for centuries. When eggs are removed from the lake and hatched, they provide a living link to past communities. Dozens of lakes in Vermilion Co., Illinois were formed within the past century by strip-mining, and I will use these lakes to address questions regarding how different factors influence the persistence ability of populations, and consequently, the development of aquatic communities. I will take sediment cores that extend to the formation of each lake. This presents a unique opportunity to examine factors responsible for why populations become extinct, since the eggs contained within the core display the entire colonization history of zooplankton, and demonstrate patterns of species replacement through time. Many of these dormant eggs can be hatched, allowing me to use multiple populations of Daphnia to investigate the relative importance of within population (genetic diversity, life-history variation) versus among population (competition, predation) processes in determining changes in species composition over time. As part of the education component, I will produce a manual for elementary school teachers that will include activities for self-guided field trips of the lakes located a state park.This project was originally funded as a CAREER award, and was converted to a Presidential Early Career Award for Engineers and Scientists (PECASE) award in September 2004.