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布设的沼泽植被存在-缺失数据集。该系列样带旨在研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），用于探究盐沼刈割的生态效应。其中两个样地（标记为McH与EPH）自布设起定期开展盐沼刈割作业，直至2002年；剩余两个样地（PUH与CC）作为对照样地。另外增设的2个样地（标记为RM与RR，含8条样带），最初用于监测芦苇（Phragmites australis）的入侵过程。