Occurrence of Globorotalia cavernula in the water column and sediments: global compilation of sightings and abundances

Here, we present a global compilation of previously reported sightings of the rare planktic foraminifer Globorotalia cavernula Bé, 1967 as well as new observations of live-collected specimens from the Southern Ocean (Subantarctic south of Africa). The goal of this synthesis is to provide the geographic and stratigraphic context needed to investigate the past and present-day distributions of this rare but possibly under-recognized species. The previous records include modern occurrences in the water column (collected by plankton net tows and a single sediment trap) and seafloor sediments ranging in age from recent to Eocene. Seafloor sediment samples were collected by dredge, sediment grabs and core-tops. Deeper sediments came from drilling cores. Existing databases provided a foundation for this compilation, particularly ForCenS for surface sediments (Siccha & Kucera, 2017) and FORCIS for water-column collections (de Garidel-Thoron et al., 2022; Chaabane et al., 2022, 2023). These records were supplemented with occurrences from the literature, PANGEA, and cruise reports of the Deep Sea Drilling Project (DSDP) / Ocean Drilling Program (ODP). Searches were conducted in October 2022 using Google Scholar, GBIF, EOL (Encyclopedia of Life, "http://eol.org", which includes records from the Smithsonian NMNH). Where available, we include information on the abundance of G. cavernula in each collection, and indicate whether photographic evidence (or drawings) could be found to support the identification. Globorotalia crozetensis Thompson, 1973 (reclassified as G. cavernula by Brummer & Kučera, 2022) and closely related Globorotalia petaliformis Boltovskoy, 1974 were also included in compilation.

本研究构建了一则全球汇编数据集，涵盖此前已报道的稀有浮游有孔虫（planktic foraminifer）洞穴球房虫（Globorotalia cavernula Bé, 1967）的全部目击记录，同时纳入了采自南大洋（非洲以南亚南极海域）的新鲜活体标本的全新观测结果。本综合研究的核心目标是提供完整的地理与地层学背景信息，以探究这一稀有但大概率未被充分识别的物种的古今分布格局。已有的物种记录包含两类：一是水柱中的现代分布记录，通过浮游生物网拖网与单台沉积物捕集器采集获得；二是时代跨度从现代沉积至始新世的海底沉积物记录。海底沉积物样本通过挖泥作业、沉积物抓取器与顶积岩芯采集获取，更深层的沉积物则取自钻探岩芯。本数据集的汇编以现有公开数据库为基础，其中用于表层沉积物数据的ForCenS（Siccha & Kucera, 2017）与针对水柱采集样本的FORCIS（de Garidel-Thoron et al., 2022; Chaabane et al., 2022, 2023）贡献尤为突出。此外，研究团队还补充了来自已发表文献、PANGEA数据库以及深海钻探计划（Deep Sea Drilling Project, DSDP）/大洋钻探计划（Ocean Drilling Program, ODP）航次报告中的物种分布记录。本次数据检索于2022年10月开展，检索范围涵盖Google Scholar、GBIF以及EOL（生命百科全书，Encyclopedia of Life, "http://eol.org"，包含史密森尼国家自然历史博物馆的馆藏记录）。若有可用数据，研究团队将标注每个采集样本中G. cavernula的个体丰度信息，并明确是否可获取支持该物种鉴定的影像证据（或绘图资料）。本汇编同时纳入了1973年Thompson定名的克罗泽球房虫（Globorotalia crozetensis Thompson, 1973）（后经Brummer & Kučera, 2022重新归类为G. cavernula）及其近缘物种花瓣球房虫（Globorotalia petaliformis Boltovskoy, 1974）的相关记录。

搜集汇总

背景与挑战

背景概述

该数据集是一个关于稀有浮游有孔虫Globorotalia cavernula的全球观测记录汇编，涵盖了从水体（如浮游生物网和沉积物捕获器）到海底沉积物（从现代到始新世）的出现和丰度数据。数据集整合了多个现有数据库和文献，旨在为研究该物种的过去和现代分布提供地理和地层背景，并包括相关物种Globorotalia crozetensis和Globorotalia petaliformis的记录。