Infaunal marine invertebrate fauna inside and outside of bacterial mats, Casey 2006-07

Infaunal marine invertebrates were collected from inside and outside of patches of white bacterial mats from several sites in the Windmill Islands, Antarctica, around Casey station during the 2006-07 summer. Samples were collected from McGrady Cove inner and outer, the tide gauge near the Casey wharf, Stevenson's Cove and Brown Bay inner. Sediment cores of 10cm depth and 5cm diameter were collected by divers using a PVC corer from inside (4 cores) and outside (4 cores) each bacterial patch. The size of each patch varied from site to site. Cores were sieved at 500 microns and the extracted fauna preserved in 4 percent neutral buffered formalin. All fauna were counted and identified to species where possible or assigned to morphospecies based on previous infaunal sampling around Casey.An excel spreadsheet is available for download at the URL given below. The spreadsheet does not represent the complete dataset, and is only the bacterial mat infauna data.Regarding the infauna dataset:- in - in the mat or patch of bacteria and out is in the "normal" sediment surrounding the patch without evidence of any bacterial mat presence.- Patch numbers were allocated to ensure there was no confusion between patches in the same area.- Fauna names are our identification codes for each species. Some we have confirmed identifications for, some not. Species names, where we have them and as we get them, are listed against these codes in the Casey marine soft-sediment fauna identification guide.This work was completed as part of ASAC 2201 (ASAC_2201).

2006-2007年夏季，研究团队于南极凯西站（Casey station）周边的风车群岛（Windmill Islands）多个采样点，从白色细菌垫斑块的内部与外部采集了底内海洋无脊椎动物（infaunal marine invertebrates）样本。采样点位涵盖麦克格雷迪湾内外、凯西码头附近的潮位站、史蒂文森湾以及布朗湾内部。

潜水员使用PVC采芯器（PVC corer）进行沉积物柱样采集：每个细菌垫斑块内部采集4根柱样，外部采集4根柱样，柱样规格为深度10cm、直径5cm。各细菌垫斑块的大小因采样点位不同存在差异。采集得到的柱样经500微米孔径筛网筛分后，将分离得到的动物样本用4%中性缓冲福尔马林溶液固定保存。

对所有获取的动物样本进行计数，尽可能鉴定至物种水平；无法精确鉴定的，则参考凯西站周边既往底内生物采样结果，归类为形态种（morphospecies）。下方提供的可下载Excel电子表格仅包含细菌垫相关的底内生物数据，并非完整数据集。

关于底内生物数据集的补充说明：
- "内部"指细菌垫斑块内部，"外部"指斑块周围无任何细菌垫迹象的"常规"沉积物环境；
- 为避免同一区域内不同斑块产生混淆，为每个斑块分配了专属编号；
- 动物名称为我们针对各物种设定的识别代码，其中部分已完成正式物种鉴定，部分尚未完成。已确认的物种名称将与对应代码一同列于《凯西海洋软沉积动物群鉴定指南》（Casey marine soft-sediment fauna identification guide）中，后续将持续更新该指南中的物种名称。

本研究作为ASAC 2201（ASAC_2201）项目的一部分完成。