Mollusc population size distribution monitoring: Fall 2010 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 2010 report of infaunal and epifaunal mollusk 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-1101a1. 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2010年秋季的调查报告，聚焦用于种群监测的GCE-LTER盐沼站点内底内动物（infaunal）与表栖动物（epifaunal）软体动物的物种体型分布特征。所有站点的潮间带中部与潮沟岸带区域内，均通过手工采集法在已知面积的样方（quadrat）中采集样本，每个区域布设4个重复样方。采集得到的软体动物样本被带回实验室，经乙醇固定保存后，开展体长测量与个体计数工作，其中个体计数数据将单独发布。每只可测量个体的体长，通过游标卡尺或安装于体视显微镜（stereomicroscope）上的目镜测微尺完成测定。本批次采集样本的物种丰度与密度数据，可从GCE-LTER数据集INV-GCEM-1101a1中获取。由于部分个体无法完成测量，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个体数不完全一致。