PIE LTER salt marsh vegetation frequency of occurrence from regularly monitored transects in Rowley, MA

Marsh vegetation presence-absence data along transects in salt marsh sites in Rowley, MA. The transects are intended to study long term changes in marsh vegetation. Four sites ((12 transects) were originally set up to study the impact of salt marsh haying. Two of these sites (labeled McH and EPH) were regularly hayed until 2002. The other two (PUH and CC) were reference sites. Two additional sites labeled RM and RR (8 transects) were originally set up to track invasion by Phragmites australis.

美国马萨诸塞州罗利市盐沼样地内沿样带分布的沼泽植被存在-缺失数据集。该系列样带旨在探究沼泽植被的长期动态变化。最初共设立4个样地（含12条样带），用于研究盐沼割草活动的生态影响：其中两个样地（标记为McH与EPH）曾定期开展割草作业，直至2002年；剩余两个样地（PUH与CC）作为对照样地。另外增设的两个标记为RM与RR的样地（含8条样带），最初设立目的为追踪芦苇（Phragmites australis）的入侵过程。