太湖东部平原平望孔全新世环境演变地层记录  

ENVIRONMENTAL EVOLUTION OF EASTERN TAIHU PLAIN DURING THE HOLOCENE ACHIEVED BY PINGWANG CORE

作　　者：李冰[1,2] 马春梅[2] 朱诚[2] 李开封[2,3] 朱笑虹[2,4] 谭燕 王坤华[2] 郭天虹 贾天骄[2] LI Bing;MA Chun-mei;ZHU Cheng;LI Kai-feng;ZHU Xiao-hong;TAN Yan;WANG Kun-hua;GUO Tian-hong;JIA Tian-jiao(College of Resources and Environment Sciences, Hebei Normal University ,Key laboratory of Environment Change and Ecological Development of Hebei Province , Shijiazhuang 050024, China;School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing 210093, China;College of Environment and Planning, Henan University, Kaifeng 475004, China;School of Geography and Environment, Jiangxi Normal University , Nanchang 330022, China)

机构地区：[1]河北师范大学资源与环境学院,河北省环境演变与生态建设重点实验室,石家庄050024 [2]南京大学地理与海洋科学学院,南京210093 [3]河南大学环境与规划学院,开封475004 [4]江西师范大学地理与环境学院,南昌330022

出　　处：《古生物学报》2018年第4期513-523,共11页Acta Palaeontologica Sinica

基　　金：国家自然科学基金面上项目(41171163,41371204);中科院湖泊与环境国家重点实验室开放基金(2012SKL003);河北省自然科学基金青年基金项目(D2015205107);河北省教育厅青年科学基金项目(QN2016143);中国地质科学院水文地质环境地质研究所开放基金(KF201502)资助.

摘　　要：通过对太湖东部平原平望钻孔的年代、有孔虫和孢粉分析,探讨了该区域全新世植被变化与环境特征。结果显示全新世(11.5 kaBP)以来,太湖东部平原未受到广泛海侵的影响,主要是以淡水湖泊-沼泽沉积为主。该区域在4 kaBP以后,才有大面积的水稻种植。11.0—9.1 kaBP,以常绿-落叶阔叶林为主,花粉浓度较小,木本植物和水生湿生植物花粉含量增加,整体环境温凉偏干,但湿度逐渐增大,指示东亚季风逐渐加强。9.1—5.8 kaBP,花粉浓度最大,木本植物花粉含量略有减小,草本植物含量明显增加,主要是水生、湿生花粉的含量增加明显,平均达到32%,藻类含量为整个钻孔最大,其中在8—7 kaBP前后常绿类花粉含量较大,水生湿生花粉、淡水藻类的含量达到整个剖面最大,推测此时区域湿度最大,东亚夏季风最为强盛。5.8—1.3 kaBP常绿阔叶林百分比含量增加,落叶阔叶花粉含量减少,陆生草本植物的含量增加,水生湿生草本的含量减小,主要以常绿-落叶阔叶林为主,环境较前一带略干,东亚夏季风减弱。The paper showed the vegetation and environmental change in the Pingwang area of eastern Taihu Plain during the Holocene, using pollen, foraminifera and AMS14 C dating. The eastern Taihu Plain was not affected by the transgression during the Holocene (11. 5-0 kaBP), and the area was mainly dominated by fresh water lakes-marshes. Pollen data showed that the area was mainly dominated by evergreen-deciduous forest and the climate was cool and dry during the period of 11. 0 ka-10. 4 kaBP. Pollen concentration was minimum in I zone, and the tree pollen percentage reached the lowest, and herbaceous plants were 65.8% on average which contain a lot of terrestrial herbs. Pollen concentration increased, and the tree content changed little during the period of 10. 4 ka-9.1 kaBP. Aquatic pollen content and algae content increased, showing the increasing temperature and precipitation. 9. 1 ka-5.8 kaBP pollen concen-tration was the largest during the Holocene, and evergreen broad-leaved forest vegetation was the main forest. Aquatic pollen increased sharply to 32%. The content of freshwater algae was the largest during the Holocene, which indicates the most humid and most powerful East Asian monsoon, especially for the period of 8-7 kaBP in Taihu Lake Plain. The evergreen components increased, and the deciduous broad component reduced during the period of 5. 8 ka-1.3 kaBP. Terrestrial herb increased to a high level, while aquatic herbaceous decreased and concentration of algae reduced, indicating the dry and cool climate, and the intensity of monsoon gradually reduced?

关 键 词：孢粉 环境演变 全新世 平望 太湖平原 

分 类 号：Q914[天文地球—古生物学与地层学]