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组装机构：伊利诺伊大学厄巴纳-香槟分校浮游动物的卵大量积累在湖泊沉积物中，在那里它们可以存活几个世纪。当卵从湖中取出并孵化时，它们提供了与过去社区的活联系。朱红公司的几十个湖泊，伊利诺伊州形成在过去的世纪的露天开采，我将使用这些湖泊来解决问题，不同的因素如何影响种群的持久性能力，因此，水生群落的发展。我将提取每个湖泊形成时的沉积物岩心。这提供了一个独特的机会来研究导致种群灭绝的因素，因为核心中包含的卵显示了浮游动物的整个殖民历史，并展示了物种更替的模式。这些休眠卵中的许多可以孵化，使我能够使用多个水蚤种群来研究种群内（遗传多样性，生活史变异）与种群间（竞争，捕食）过程在确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，我将为小学教师制作一本手册，其中包括位于州立公园的湖泊的自助实地考察活动。该项目最初是作为职业奖资助的，并于2004年9月转换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.