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

This data set is the Fall 2008 report of infaunal and epifaunal mollusc species' size distributions at the GCE-LTER marsh sites used for population monitoring. Infaunal and epifaunal molluscs were hand-collected from within quadrats of known area from mid-marsh and creekbank zones (n = 4 quadrats per zone) at all sites. The molluscs were returned to the lab, preserved in ethanol, measured and counted (count data is reported separately). Length of each measurable individual was determined using calipers or an ocular micrometer mounted in a stereomicroscope. Species abundance and density data for these collections may be found in the GCE-LTER data set INV-GCEM-0812a1. Numbers of individuals of each species in the abundance data file may not correspond exactly to the numbers of individuals in the size data file because some individuals may not have been measureable.本数据集为2008年秋季报告，涵盖用于种群监测的GCE-LTER沼泽样地内底内软体动物（infaunal mollusc）与底上软体动物（epifaunal mollusc）的物种体型分布数据。研究人员在所有样地的潮间带中部与溪岸带，于已知面积的样方（每个样带设置4个样方）中手工采集上述软体动物。采集所得标本被带回实验室，以乙醇固定后开展体长测量与个体计数（个体计数数据将单独报告）。针对每只可测量个体，研究人员采用游标卡尺或安装于体视显微镜的目镜测微尺测定其体长。本次采集的物种丰度与密度数据可在GCE-LTER数据集INV-GCEM-0812a1中获取。丰度数据文件中各物种种群数量与体型数据文件内的个体数可能存在细微偏差，原因是部分个体无法被测量。