Foraminiferida in the Mac. Robertson Shelf–Prydz Bay region, East Antarctica: distribution and controls - unfinished study

These data are linked to what appears to be an unfinished report/paper by Pat Quilty. An extract of the unfinished report is available below, and the full document is included in the data download.

These data are also linked to a collection in the biodiversity database, and are also related to another record (both listed at the provided URLs).

Foraminiferids are recorded from samples collected on Mac. Robertson Shelf and Prydz Bay, East Antarctica in 1982, 1995 and 1997. Most are identifiable from previous literature but a new enrolled biserial agglutinated genus is noted but not defined. Distribution is related to oceanographic factors.

The Mac. Robertson Shelf-Prydz Bay region off the East Antarctic coast is that segment of the southern Indian Ocean between latitudes 66 degrees and almost 70 degrees S, and longitudes 60 degrees and 80 degrees E. It includes Mac. Robertson Shelf, the continental shelf, bounded seaward by the 500 m isobath, and Prydz Bay, the deepest re-entrant into the east Antarctic shield and the outlet for the Lambert Glacier at its southern end. The Lambert Glacier is the world’s largest glacier and drains some 1 000 000 km2 of East Antarctica. The marine region studied here covers some 140 000 km2.

Several research cruises to the region have collected sediment samples that yielded modern and recycled foraminiferid faunas. The modern component of the faunas has not been recorded in detail previously.

This paper records the details of the taxonomy and distribution of species collected during marine geology/geophysics cruises that provided the foraminiferids discussed in Quilty (1985, 2001), O’Brien (1992), O’Brien et al. (1993, 1995) and Harris et al. (1997). The geophysical results and interpretations of the 1982 voyage of MV Nella Dan are described by Stagg (1985) and this provides also the general setting and nomenclature of Prydz Bay. Two cruises (1995 and 1997) of RSV Aurora Australis collected samples and these provided the basis for Quilty’s records of foraminiferids and other components on a sample-by-sample basis in O’Brien et al. (1995) from 51 samples, and from a further 27 samples reported in Harris et al. (1997). The 1995 cruise also yielded the recycled foraminifera recorded by Quilty (2001) and the Mesozoic material documented by Truswell et al. (1999). Neither of these cruise records provided details of the faunas to the level covered here. Further studies for the region are given in the results of ODP Legs 119 and 188.

The impetus for conducting this review comes from two sources. Firstly, few foraminiferids have been documented from this region, and even fewer have been figured. Secondly, 2007-2008 was designated the [fourth] International Polar Year (IPY) and one of the major programs is the Census of Antarctic Marine Life (CAML), a component of the global Census of Marine Life (CML). This paper is a contribution to that project. Included in the review are faunas from the modern environment and some which may be ‘Late Cenozoic’ in which the faunas are of the same species as the modern and in which data from the modern can be, and have been, used to infer past environments (Fillon 1974, Kellogg et al. 1979, Ward and Webb 1986).

The aims of this paper are:
- to document the species of foraminifera recovered from geology/geophysics cruises to the Mac. Robertson Shelf and Prydz Bay region, offshore East Antarctica (Fig. 1);
- to make the nomenclature of species recorded consistent with latest taxonomic practice;
- to characterise the faunas by diversity and dominance factors; and
- to discuss the controls on the distribution of faunas recorded.

本数据集关联Pat Quilty撰写的一篇未完成报告/论文。下方附有该未完成报告的节选内容，完整文档已包含在数据集下载包中。
本数据集同时关联生物多样性数据库中的一则合集，且与提供的URL中列出的另一项记录相关。
1982年、1995年及1997年，科考人员在东南极洲的麦克·罗伯逊陆架（Mac. Robertson Shelf）与普里兹湾（Prydz Bay）采集的样本中记录到有孔虫（foraminiferids）。其中多数类群可通过既往文献进行鉴定，但文中提及了一个新的内卷双列胶结有孔虫属，却未对其进行定义。有孔虫的分布与海洋学因子密切相关。
东南极沿岸的麦克·罗伯逊陆架-普里兹湾区域，位于南纬66°至近70°、东经60°至80°之间的南印度洋海域。该区域涵盖以500米等深线为海界的麦克·罗伯逊陆架（大陆架），以及深入东南极地盾最深的海湾普里兹湾——其南端为兰伯特冰川的出海口。兰伯特冰川是全球规模最大的冰川，汇水面积达约100万平方千米，覆盖东南极洲的大片区域。本次研究的海域面积约为14万平方千米。
此前已有多艘科考船前往该区域采集沉积物样本，从中获得了现代有孔虫与再沉积有孔虫类群，但此前并未对类群中的现代组分开展过详细记录。
本文记录了海洋地质/地球物理科考航次中采集的有孔虫类群的分类学与分布细节，这些类群曾在Quilty（1985、2001）、O’Brien（1992）、O’Brien等（1993、1995）及Harris等（1997）的研究中被讨论。1982年MV Nella Dan科考航次的地球物理结果与解读由Stagg（1985）完成，该成果同时阐明了普里兹湾的整体环境与命名规则。RSV Aurora Australis的两次航次（1995年与1997年）采集了样本，这些样本构成了O’Brien等（1995）中51份样本的有孔虫及其他组分的逐样记录基础，以及Harris等（1997）中额外27份样本的记录基础。1995年航次还产出了Quilty（2001）记录的再沉积有孔虫，以及Truswell等（1999）记载的中生代物质。上述两次航次的记录均未达到本文所涵盖的类群细节层级。该区域的其他相关研究可参考大洋钻探计划（ODP）第119与188航次的成果。
开展本次综述的动因来自两方面：其一，该区域已记录的有孔虫类群数量极少，且被配图展示的类群更是寥寥无几；其二，2007-2008年被定为第四届国际极地年（IPY），其中一项核心计划为南极海洋生物普查（CAML），该项目隶属于全球海洋生物普查（CML）。本文即为该项目的一项贡献。本次综述涵盖现代环境中的类群，以及部分可归类为‘晚新生代’的类群：后者的物种与现代类群一致，且可利用现代数据推断古环境（Fillon 1974、Kellogg等1979、Ward与Webb 1986）。
本文的研究目标如下：
- 记录东南极近海麦克·罗伯逊陆架与普里兹湾区域海洋地质/地球物理科考航次中获取的有孔虫物种（图1）；
- 使已记录物种的命名符合最新分类学规范；
- 从多样性与优势度角度对类群进行特征描述；
- 探讨影响所记录类群分布的控制因素。