Global Changes in Deep-Sea Benthic Foraminiferal Distribution Over the Last Two Complete Glacial Cycles

冰期-间冰期底栖有孔虫的变化 分布和丰度将被确定， 同位素（碳和氧），有机碳百分比， 底栖动物/表栖动物比率，碳酸盐保存， 浮游生物/底栖生物比率。 将使用底栖有孔虫，因为 它们的丰度和分布模式反映了深海 条件 根据这些模式，PI将尝试 重建信息b（使用主成分分析）关于 生产能力、溶解氧含量和深层循环 在过去的两个完整的冰川周期中，冰川海洋。

The changes in glacial-interglacial benthic foraminferal distribution and abundance will be determined, as well as stable isotopes (carbon and oxygen), percent organic carbon, infaunal/epifaunal ratios, carbonate preservation, and planktic/benthic ratios. Benthic foraminifera will be used because their abundance and distribution patterns reflect deep-ocean conditions. Based on these patterns, the PI will attempt to reconstruct informationb (using principal component analysis) about the productivity, dissolved oxygen content and deep circulation of the glacial ocean during the past two complete glacial cycles.