Abundance and biomass of benthic foraminifers in the region of the South Sandwich Trench and Falkland Islands@en

Distribution and biomass of living benthic foraminifers was studied in two sections in the region of the South Sandwich Trench and Falkland Islands. Biomass was found to be high (up to 30 g/m**2) and closely related to number of tests both with and without plasma. Abundance and biomass were the highest in subantarctic waters near the Falkland Islands. The bulk of biomass is made of secretory foraminifers. Agglutinating foraminifers form the largest biomass.本研究针对南桑威奇海沟（South Sandwich Trench）与福克兰群岛（Falkland Islands）海域的两个调查断面，对现存底栖有孔虫（benthic foraminifers）的分布特征与生物量展开了系统调查。研究结果表明，该类群的生物量较高（最高可达30 g/m²），且与携带原生质与不含原生质的壳体（tests）的数量均存在显著相关关系。底栖有孔虫的丰度与生物量在福克兰群岛邻近的亚南极水域中达到峰值。生物量的主体组成为分泌型有孔虫，而胶结型有孔虫则贡献了最大的生物量占比。