珠江三角洲第四纪晚期孢粉组合

LATE QUATERNARY PALYNOLOGICAL ASSEMBLAGES IN THE Zhujiang(PEARL) RIVER DELTA

本文对珠江三角洲三个钻孔的样品作了孢粉分析。根据孢粉组合,初步探讨了珠江三角洲地区的植被演替规律和气候变化趋势,从而为古环境的研究和地层的划分提供了依据。

Based on palynological assemblages of 3 cores and the result of cluster analysis, the Late Quaternary palynological assemblages in the Pearl River Delta, can be divided into 5 spore and pollen zones in the following ascendant order.1. Pinus-Castanea-Gramineae-Polypodiaceae spore and pollen zone.2. Castanopsis-Castanea-Elaeocarpus spore and pollen zone.3. Castanea-Cyclobalanopsis-Gramineae-Polypodiaceae spore amd pollen zone.4. Castanopsis-Lithocarpus-Elaeocarpus-Polypodiaceae spore and pollen zone.5. Pinus-Castanopsis-Gramineae-Dicranopteris spore and pollen zone.The vegetation succession and climatic fluctuation phase representing the different climatic epochs, reflected by these spore and pollen zones since the Late Pleistocene in the region of the Pearl River Delta are as follows:Phase I . Northern subtropical evergreen and deciduous mixed broadleaf forest and temperate climate,corresponding to the Middle Wurm Sub-postglacial; Phase Ⅱ. Middle subtropical evergreen broad-leaf forest and warm climate, corresponding to the Late Wiirm Sub-poStglacal; Phase Ⅲ .Vegetation and climate in the early and late phase being similar to that of phase I and phase Ⅱ. corresponding to the Late Wiirm Glacial and the Rising Temperature Epoch of Early Holocene; Phase Ⅳ. Southern subtropical evergreen seasonal rain forest and hot climate; corresponding to the High Temperature Epoch of Middle Holocene; Phase V. Vegetation and climate of this phase being equal to that of the present, namely the Lowering Temperature Epoch of Late Holocene.