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

9726992 皮克特·莫林 生态演替一直是植物群落生态学研究的焦点。尽管有兴趣和许多研究，我们对这一过程的理解大多是基于对同一时间点不同年龄群体的研究。这种方法并不总是能排除站点间的变量，因此随着时间的推移跟踪同一站点具有优势。该项目将继续对40年前开始的植物演替进行长期研究，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性地块，并从那时起定期监测。这项长期的研究记录了不同作物的农田废弃后以及不同年份和不同季节废弃后的生态演替过程。 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.