Mollusc population size distribution monitoring: Fall 2009 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 2009 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-1010a1. 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.本数据集为针对用于种群监测的GCE-LTER沼泽样点整理的2009年秋季底内软体动物（infaunal）与底上软体动物（epifaunal）物种种群体长分布报告。研究人员在所有样点的沼泽中部及溪岸带（每个样带设置4个已知面积的样方）内手工采集上述软体动物。采集所得样本被带回实验室，以乙醇固定保存，随后进行个体计数与体长测量（个体计数数据将另行发布）。对每只可测量的个体，使用游标卡尺或体视显微镜搭载的目镜测微尺测定其体长。本次采集的物种种群丰度与密度数据可于GCE-LTER数据集INV-GCEM-1010a1中查询获取。由于部分个体无法完成测量，丰度数据文件中各物种种群的个体数量与大小数据文件中的对应数值可能不完全一致。