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年秋季针对GCE-LTER盐沼站点开展种群监测的底内（infaunal）与表栖（epifaunal）软体动物物种体型分布调查报告。研究人员于所有监测站点的中潮区与溪岸带，在已知面积的样方内手工采集上述软体动物，每个区域设置4个样方。采集所得样本被带回实验室，以乙醇固定保存，随后开展体长测量与个体计数（计数数据将单独发布）。针对每个可测量个体，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确定其体长。本批采集物的物种丰度与密度数据可查阅GCE-LTER数据集INV-GCEM-0812a1。由于部分个体可能无法完成测量，丰度数据文件中各物种的个体数量或与体型数据文件中的对应数值存在细微差异。