POLLEN RECORDS OF TENGHUALUO SITE IN LIANYUNGANG CITY, JIANGSU PROVINCE
Zhao Lin;Ma Chunmei;Lin Liugen;Zhu Cheng;Fang Yiman;Zhang Yu;School of Geographic and Oceanographic Sciences,Nanjing University;Archaeological Institute of Nanjing Museum;
As one of the typical Neolithic sites in the Huaihe River valley,Tenghualuo site(34°41'00 "N,119°20'30" E),with elevation of 6~7m,is located in the fluvial plain between the South Yuntai Mountain and the North Yuntai Mountain in Lianyungang City,Jiangsu Province.According to the excavated materials and ~(14)C dating results,the site spans Longshan Culture(4500~4200aB.P.) mainly.To study the possible information of regional vegetation,climate and human activities,two profiles(07LTT1 and 07LTT2)of the site were chosen for pollen analysis.Totally 55 pollen samples were analyzed.Compared to the changes of Rb/Sr,these results were given:(1)Before the Longshan Culture arose,Ginkgoaceae,Juglans,Ulmus,Quercus(D) and Morus are dominant,while Pinus and Picea were little.In herbs,Cyperaceae was abundant,while Chenopodiaceae and Artemisia are rare.The vegetation characteristic is deciduous hardwood.(2)During the early period of Longshan Culture,arboreal trees decreased gradually to a trough and herbs became dominant.In trees and shrubs,Juglans,Pterocarya,Quercus(D) and Morus are significantly reduced,while Pinus increases dramatically.In herbs,Chenopodiaceae and Artemisia are less while Cyperaceae and Typha are more.The vegetation characteristic is deciduous broad-leaved containing a small amount of conifer with many herbaceous plants under the trees.During this period,Rb/Sr is low,indicating a significant cooling event.Gramineae is dominant in herb pollen,showing remarkable human activity effect.The fluctuant changes of woody pollen percentage and Rb/Sr may show abrupt climate events.(3)During the natural layer of Longshan Culture,trees and shrubs increased while herbs decreased.In woody plants,Quercus(D),Castanea,Ulmus and Morus were abundant,while evergreen oaks arose.In addition,Cyperaceae is low,and Polypodiaceae is high.Vegetation was deciduous broad-leaved containing evergreen tree species during this period.(4)In the late period of Longshan Culture,woody plants play a significant role,in which Ulmus,Quercus(E),Quercus(D) and Pterocarya are more while Ginkgoaceae and Pinus are rare.In herbs,Chenopodiaceae and Artemisia are less while Cyperaceae is more.Typical landscape of subtropical deciduous broadleaf forests showed during this period.In addition,high Rb/Sr also indicates a warm and humid climate.(5)Pollen of Tenghualuo site recorded vegetation and climate environment information during 4500~4000aB.P.,in response to climate and environment changes from warm and wet period to cool and dry period in the East Asian monsoon area during the Mid-Late Holocene transition.
【Fund】： 中国科学院战略性先导科技专项项目(批准号:XDA05130502);; 中央高校基本科研业务费专项项目(批准号:1082020904和1121020904);; 2011年度国家社科基金重大项目(批准号:11&ZD183)共同资助
【CateGory Index】： Q914;K871.13
【CateGory Index】： Q914;K871.13