Mollusc population abundance monitoring: Fall 2017 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 2017 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-1807a.

本数据集为2017年秋季针对用于种群监测的GCE-LTER盐沼点位的底内与表栖软体动物丰度的估算结果。所有点位的软体动物丰度测定方式如下：在盐沼中部及溪岸带（每个区域设置4个样方）内，手工采集已知面积样方中的全部底内和表栖软体动物。采集所得软体动物被带回实验室，先用乙醇固定，随后转移并保存于乙醇中，之后进行计数与测量（尺寸数据将另行报告）。计数结果将被换算为每平方米的个体数量。腹足类物种优先列出，随后为双壳类物种。本次采集的尺寸分布数据可从GCE-LTER数据集INV-GCEM-1807a中获取。