Soft sediment assemblages at Casey Station: Brown Bay Grid - samples taken along a pollution gradient.

A survey of macrobenthic assemblages in soft-sediments was done at Casey Station, East Antarctica. Samples were taken along four transects in Brown Bay, along a pollution gradient that has its source at an abandoned waste tip on the shore of Brown Bay. The transects were up to 300 M long and there were 9 sampling stations on each transect except for transect four which had only 4 sampling stations. Sampling stations were at the following distances from the shoreline and tip site: 10 m, 20 m, 30 m, 40 m, 50 m, 100 m, 150 m, 200 m, and 300 m. Two cores of the soft-sediment assemblages were taken at each sampling station and two cores for analysis of heavy metals and hydrocarbons. Samples were taken by divers using hand-held corers (fauna core size - 10 cm diameter by 10 cm deep; sediment analysis cores - 5 cm diam. by 10 cm deep). The aims were: 1) to determine the nature and extent of the contamination gradient in front of the tip site and; 2) to determine if there was a corresponding response in the soft-sediment assemblages along the contamination gradient. A total of 62 samples of soft-sediment assemblages and 62 samples for heavy metal and hydrocarbon analysis were taken. Sediment grain size was also examined at each sampling point. The benthic diatom communities were also analysed in each sample. Links to ASAC 1100. The fields in this dataset are: Distance Position Site and replicate Species Quality: Gammarid, Isopod, gastropod faunas identified at the Australian Museum. Remaining faunas identified by J. Stark. Diatoms identified by L. Cunningham. 2018-09-25 - The original datasheet was reformatted to fit OBIS/GBFI/IPT Biodiversity.AQ standardS. The new datasheet 'caseySurvey_BBGinfauna.csv" provides datasetID, occurrenceID, eventID, locality, locationID, decimalLatitude, decimalLongitude, continent, countryCode, eventDate, occurrenceStatus, organismQuantity, organismQuantityType, basisOfRecord, institutionCode, and protocol. The lowest taxonomical rank of the species identified that could be determined is provided, after matched in WoRMS (World Register of Marine Species).

本数据集针对南极东部凯西站（Casey Station）周边软沉积物中的大型底栖生物群落（macrobenthic assemblages）开展了调查。采样工作在布朗湾（Brown Bay）的四条样带上开展，采样梯度沿源自布朗湾岸边废弃废料堆的污染梯度设置。各条样带最长可达300米，除第四条样带仅设4个采样站位外，其余每条样带均设置9个采样站位。各采样站位与岸线及废料堆的距离依次为：10米、20米、30米、40米、50米、100米、150米、200米及300米。每个采样站位采集2个软沉积物生物群落岩芯，同时采集2个岩芯用于重金属与烃类污染物分析。采样由潜水员使用手持岩芯取样器完成：生物群落岩芯规格为直径10厘米、深度10厘米；沉积物分析岩芯规格为直径5厘米、深度10厘米。本次调查的目标为：1）明确废料堆前方污染梯度的性质与范围；2）探究沿该污染梯度分布的软沉积物生物群落是否出现相应的生态响应。本次调查共采集软沉积物生物群落样本62份，重金属与烃类分析样本62份。同时对每个采样点的沉积物粒度进行了检测。此外，对每份样本中的底栖硅藻群落开展了分析。关联编号ASAC 1100。本数据集包含以下字段：距离、站位位置、采样位点、重复样本、物种、样本质量：钩虾类（Gammarid）、等足类（Isopod）、腹足类动物群由澳大利亚博物馆（Australian Museum）完成鉴定；其余类群的动物群由J. Stark鉴定；硅藻由L. Cunningham鉴定。2018年9月25日：原始数据表已重新格式化，以符合OBIS/GBFI/IPT Biodiversity.AQ标准。新版数据表"caseySurvey_BBGinfauna.csv"包含以下字段：数据集ID（datasetID）、发生记录ID（occurrenceID）、事件ID（eventID）、采样地点（locality）、位置ID（locationID）、十进制纬度（decimalLatitude）、十进制经度（decimalLongitude）、大洲（continent）、国家代码（countryCode）、事件日期（eventDate）、发生记录状态（occurrenceStatus）、生物个体数量（organismQuantity）、生物个体数量类型（organismQuantityType）、记录依据（basisOfRecord）、机构代码（institutionCode）与实验方案（protocol）。经与世界海洋物种登记册（WoRMS, World Register of Marine Species）匹配后，本数据集提供了可鉴定至的最低分类学等级的物种信息。