Pollen and spore percentage data of composite sediment core GeoB16602 over the past 140 kyr

Cores of marine site GeoB16602 (18.95°N, 113.71°E, water depth, 953 m) were recovered during the 2012 RV SONNE cruise SO-221 “INVERS”, northern South China Sea. Pollen samples were processed via standard hydrochloric-hydrofluoric acid procedure. Pollen and spore percentages were calculated based on the pollen sum (>300 grains per sample) and spore sum (>100 grains) respectively. The data set cover the whole last glacial cycle (140 kyr) with an average temporal resolution of ~600 years, revealing vegetation evolution history of the Pearl River catchment area in southern China. In general, the results reveal three different evolution patterns of vegetation at the tropical-subtropical flora ecotone: the zonal forest exhibited a clear glacial-interglacial cycle and weak response to stadial cooling; the fern communities exhibited similar glacial-interglacial variations but more sensitivity to low-amplitude temperature fluctuations; the glacial-interglacial trend in coastal wetland vegetation was ambiguous whereas a series of millennial-scale expansion events were closely related with sea-level rises.

2012年，在"松涅号"研究船（RV SONNE）SO-221航次"INVERS"科考任务期间，于南海北部海域获取了海洋站位GeoB16602的岩芯样品，该站位地理坐标为18.95°N、113.71°E，水深953米。孢粉样品采用标准盐酸-氢氟酸法进行前处理。孢粉百分比分别以每样品花粉总数（>300粒）与孢子总数（>100粒）为基准计算得出。本数据集覆盖完整的末次冰期旋回（140 kyr，即14万年），平均时间分辨率约为600年，揭示了中国南部珠江流域的植被演化历史。总体而言，研究结果揭示了热带-亚热带植物区系交错带的三类植被演化模式：地带性森林呈现清晰的冰期-间冰期旋回特征，且对冰阶降温的响应较弱；蕨类植物群落同样表现出类似的冰期-间冰期变化规律，但对低幅度温度波动的敏感性更强；滨海湿地植被的冰期-间冰期演化趋势不甚明确，但一系列千年尺度的植被扩张事件与海平面上升过程密切相关。