Mollusc population abundance monitoring: Fall 2008 mid-marsh and creekbank infaunal and epifaunal mollusc abundance based on collections from GCE marsh, monitoring sites 1-10

This data set is the Fall 2008 estimate of infaunal and epifaunal mollusc abundance at the GCE-LTER marsh sites used for population monitoring. Species abundance was determined by hand-collecting all the infaunal and epifaunal molluscs from within quadrats of known area in mid-marsh and creekbank zones (n = 4 quadrats per zone) at all sites. The molluscs were returned to the lab, fixed in ethanol, transferred to and preserved in ethanol, counted and measured (size data is reported separately). The counts were converted to number per square meter. Gastropod species are listed first, followed by bivalve species. Size distribution data for these collections may be found in the GCE-LTER data set INV-GCEM-0812a2.

本数据集为2008年秋季针对GCE-LTER沼泽监测点位的底内（infaunal）与表栖（epifaunal）软体动物丰度估算结果，该监测点位用于种群监测。所有点位的软体动物丰度通过如下方式测定：在各点位的沼泽中部与溪岸带内，于已知面积的样方（quadrat，每个区域设置4个样方）中手工采集所有底内与表栖软体动物。采集所得的软体动物被带回实验室，经乙醇固定后转移并保存于乙醇中，随后完成计数与测量（尺寸数据将另行公布）。计数结果已换算为每平方米的个体数量。数据集首先列出腹足类（Gastropod）物种，随后为双壳类（Bivalve）物种。本次采集的尺寸分布数据可于GCE-LTER数据集INV-GCEM-0812a2中获取。