Macroinfaunal abundance in shallow water habitats around the Chandeleur Islands in 2015 and 2016

Abundances of benthic macroinfauna were measured in conjunction with field-deployed sediment oxygen demand chambers at four sites on the Chandeleur Sound side of the Chandeleur Islands in the Fall and Summer of 2015 and 2016. Cores (15 cm diameter, 15 cm depth) were collected after each sediment oxygen demand measurement was completed in the field, and additional cores were collected for infauna only (with no SOD measurement; either 10 or 15 cm diameter; 15 cm depth). Each sediment core was sieved using 0.5 mm mesh. Each sample was preserved in 95% ethanol and Rose Bengal stain. All organisms that were alive upon collection and therefor stained were picked out using a dissecting microscope, and placed into separate vials with 95% ethanol for preservation. Animals were identified to lowest taxonomic classification possible, and abundance of each taxa was determined. Abundances are presented as individuals/m2. These data are associated with the dataset: Sediment oxygen demand in shallow water habitats around the Chandeleur Islands in 2015 and 2016.2015年及2016年的秋、夏两季，研究人员于尚德利尔群岛（Chandeleur Islands）朝向尚德利尔湾（Chandeleur Sound）一侧的四个采样点位，结合现场布设的沉积物需氧量（sediment oxygen demand, SOD）舱，开展了底栖大型无脊椎动物（benthic macroinfauna）丰度的测定工作。每完成一处现场沉积物需氧量测定后，即采集沉积物岩心（直径15 cm，深度15 cm）；此外还额外采集了仅用于底栖无脊椎动物分析的沉积物岩心（未开展沉积物需氧量测定，直径为10 cm或15 cm，深度均为15 cm）。所有沉积物岩心均经0.5 mm孔径筛网过筛。每份样品均使用95%乙醇固定，并辅以玫瑰红（Rose Bengal）染色。借助体视显微镜（dissecting microscope）挑取出采集时存活且完成染色的所有生物个体，转移至盛有95%乙醇的样品瓶中进行长期保存。对所获动物开展尽可能精细的分类学鉴定，明确各分类单元的丰度。丰度统计结果以个体/平方米为单位呈现。本数据集与《2015-2016年尚德利尔群岛周边浅海栖息地沉积物需氧量数据集》相关联。