Benthic foraminifera abundances of sediment core LV76-21

Benthic foraminifera were studied in the core LV76-21 sediments sampled in 1 cm-thick slices. All the samples were dried, weighted, and wet sieved using a 63 μm sieve. The benthic foraminifera shells were picked and counted from the 63–250 μm sediment fraction. In total, 222 samples were analyzed at an average resolution of 2.5 cm (range 1–5 cm). Almost all the samples had enough microfossils for representative evaluation, except for intervals 365 cm, 398–408 cm, 435–440 cm, 444–465 cm, and 490–510 cm, where foraminifera were rare or absent. The total benthic foraminifera abundance (BFA) expressed as the number of shells per 1 g of dry sediment (shells x g^−1).

针对LV76-21岩芯沉积物开展底栖有孔虫（Benthic foraminifera）研究，沉积物按1厘米厚度切片进行取样。所有样品均经干燥、称重后，采用63 μm孔径筛进行湿筛处理。从63–250 μm的沉积物粒级中挑取并计数底栖有孔虫壳体。共计分析222个样品，平均取样分辨率为2.5 cm（区间为1–5 cm）。除365 cm、398–408 cm、435–440 cm、444–465 cm以及490–510 cm层段外，其余几乎所有样品均含有足够数量的微体化石以满足代表性评估需求，上述层段内有孔虫极为稀少甚至缺失。底栖有孔虫总丰度（BFA）以每1克干沉积物中的壳体数量计（单位：枚·克^−1）。