Fall 2012 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 2012 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2012年秋季GCE-LTER沼泽监测站点的螃蟹密度估算数据，该站点用于种群监测工作。螃蟹丰度通过统计625平方厘米样方（quadrat）内的蟹洞数量，并将计数结果转换为每平方米的个体数进行计算。研究在GCE第1至10号站点的沼泽中部与溪岸带开展计数工作，每个区域设置4个重复样方（n=4）。该方法无法区分单个蟹洞所属的螃蟹物种，因此仅能估算总螃蟹丰度。计数过程中排除了已封堵的蟹洞。