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Relationship between surface pollen assemblages and vegetation in luonan basin, Eastern Qinling Mountains, Central China

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Journal of Geographical Sciences 2014年第3期24卷 427-445页

作者： ZHANG Wenchao LI Chunhai LU Huayu TIAN Xianhua ZHANG Hongyan LEI Fang TANG Lingyu School of Geographic and Oceanographic Sciences Nanjing University Jiangsu Collaborative Innovation Center for Climate Change Nanjing 210093 China State Key Laboratory of Lake Science and Environment Nanjing institute of Geography and Limnology CAS Nanjing 210008 China College of Life Sciences Shaanxi Normal University Xi'an 710062 China Nanjing Institute of Geology and Paleontology CAS Nanjing 210008 China

The catchment of South Luohe River in Central China is an important region for investigating modern pollen-environment relationship, because it is located in the transitional zone between south and north China, an environment which is sensitive to climate changes. In this study, 40 surface samples under ten vegetation types were collected to reveal the relationship between pollen assemblages and vegetation. The results show that the surface pollen assemblages reflect the vegetation quite well. In forest topsoils, the average of arbo- real pollen content is greater than 40%, and the Selaginella sinensis spore is high. As to sparse forest grassland and shrub community, the average arboreal pollen is 13.2% and 16.6% respectively, and the shrub pollen is relatively higher than that of grassland samples. The grassland and farmland are characterized by low percentage of tree and shrub pollen （〈10% and 〈1%）, and high percentage of herbs （〉80%）. Pinus, Quercus and some other arboreal pollen can indicate the regional vegetation because of their dispersal ability. Quercus pollen is under-representative and so is Pinus. Artemisia pollen is significantly over-represented, has poor correlation with the plant coverage, and may reflect human dis- turbance. Gramineae can indicate plant quite well, but with low representation. High content of Chenopodiaceae probably suggests human impact. Predominant Selaginella sinensis can be used as an indicator of forest environment. Cluster analysis and principal components analysis of pollen assemblages can distinguish forest and non-forest vegetation well. The former method is better at separating pine and mixed forests, while the latter is more stable and could better differentiate farmland and other non-forest area. The first axis of PCA mainly reflects the humidity.

关键词： surface pollen vegetation type cluster analysis PCA luonan basin

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Stratigraphy and TL Dating of Paleolithic Sites in the luonan basin,China

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人类学学报 2002年第S1期21卷 67-77页

作者： WANG She jiang(Shaanxi Provincial Institute of Archaeology, Xi’an, P. R. China 710054) HUANG Pei hua(Department of Earth and Space Science, University of Science and Technology of China, Hefei 230026)

Between 1995 and 1999 the Longyadong cave site and 50 open air Paleolithic sites were investigated and excavated in the luonan basin of China. A total of 1?751 stone artifacts were collected from open air sites, and fossils from about 20 animal species as well as 65?000 lithic artifacts were excavated from the cave site. This paper provides a preliminary study of site lithic stratigraphics in their geological context as well as the results of thermoluminescence (TL) dating. The TL dates of five soil samples place the sites into the middle to late period of the Middle Pleistocene (Q 2 2—3 ). Upon further taking into account strata relationships, three cultural periods were identified in Longyadong cave. When compared with the TL dates and stratigraphy from Zhoukoudian Locality 1, loess deposits in Shaanxi Luochuan, red earth in Anhui and deep sea records, Longyadong is in the range of 500—250 kyr, approximately the same timeframe as Zhoukoudian Locality 1.

关键词： Stratigraphy TL dating Paleolithic Longyadong Cave Open air Sites luonan basin

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