PALEOVEGETATION AND PALEOENVIRONMENT OF THE TAIHU PLAIN DURING THE PLEISTOCENE——A CASE STUDY OF CORE ZKW4
Situated in the middle and lower reaches of the Yangtze River,the Taihu plain is controlled by the East Asian Monsoon,with the transitional climate of the southern north subtropical and the northern middle subtropical.The study on the Quaternary climate and environmental change in this region is of great significance for the investigation of spatio-temporal variation of East Asian Monsoon and sea level changes.Based on an integrative analysis of palynology and geochemical elements of Core ZKW4 through 25.05 m to 112.68 m in depth in the northern Taihu plain,Wuxi City,vegetation changes and seawater influences at the research site during the Pleistocene period were preliminarily restored.The vegetation has evolved from deciduous broad-leaf forest in the early Early Pleistocene(2 113-1 800 ka)through deciduous broad-leaved forest and grassland in the middle Early Pleistocene(1 800-1 070 ka),evergreen and deciduous broad-leaf mixed forest in the late Early to Middle Pleistocene(1 070-126 ka),and deciduous broadleaf forest with evergreen component-mixed in the Late Pleistocene(126-72 ka).Two transgressions might have occurred during the Middle Pleistocene(about 408.7-470.3 ka)and Late Pleistocene(about 95.8-111.6 ka).
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