LTREB: Patterns of Community and Population Change in Oldfields at the Hutcheson Memorial Forest Center

[9726992] Pickett &amp； Morin生态演替一直是植物群落生态学研究的中心焦点。尽管有兴趣和大量的研究，但我们对这一过程的大多数理解都是基于对同一时间点不同年龄群体的检查。这种方法不能总是排除站点到站点的变量，因此随着时间的推移跟踪同一站点具有优势。该项目将继续40年前开始的植物演替的长期研究，比任何其他已发表的研究都要长。它利用了1958年在美国东北部10个老油田划定的永久地块，并从那时起定期监测。本研究记录了不同作物退耕和不同年份、不同季节退耕后的生态演替过程。目前资助的研究将继续进行实地监测、维护实地地块、数据输入和数据分析。

9726992 Pickett & Morin Ecological succession has long been a central focus of plant community ecology. Despite the interest and numerous studies, most of our understanding of the process is based on examination of different aged communities at the same point in time. Such an approach can not always factor out site to site variables and thus following the same site over time has advantages. This project will continue a long-term study of plant succession that began 40 years ago, longer than any other published study. It takes advantage of permanent plots that were delineated in 10 oldfields in the northeastern U.S. in 1958 and have been periodically monitored since that time. This long-term study records the course of ecological succession following abandonment of fields used for different crops and following abandonment in different years and in different seasons. The present funded research will continue field monitoring, maintenance of field plots, data entry and data analysis.