Fall 2010 crab population monitoring: mid-marsh and creek bank abundance based on crab hole counts at GCE marsh, monitoring sites 1-10

This data set is the Fall 2010 estimate of crab densities at the GCE-LTER marsh sites used for population monitoring. Crab abundance was determined by counting the number of crab holes within a 625 cm^2 quadrat and converting the counts to number per square meter. Counts were made in the mid-marsh and creek bank zones (n = 4 per zone) at GCE sites 1 through 10. This method does not differentiate which species made a particular hole and therefore only estimates total crab abundance. Plugged holes were excluded from the counts.

本数据集为2010年秋季针对用于种群监测的GCE-LTER沼泽站点的蟹类密度估算值。蟹类丰度通过统计625 cm²样方（quadrat）内的蟹类洞穴数量，并将计数结果换算为每平方米的个体数。计数工作在GCE-LTER第1至10号站点的沼泽中部与河岸带区域开展，每个区域设置4个样方。该方法无法区分单个洞穴所属的蟹类物种，因此仅能估算蟹类总丰度。本次计数过程中，已封堵的洞穴未被纳入统计。