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| 1 | Holocene vegetation cover in Qin’an area of western Chinese Loess Plateau revealed by n-alkane显示文摘Previous studies have found that wetlands prevailed in western Chinese Loess Plateau and pine pollen could reach up to 80% in Qin’an area of the plateau during middle Holocene. It was then deduced that forest vegetation covered Qin’an area in a warm and wet climate during middle Holocene. The proxies of molecule biomarkers from two Holocene sections, a swamp-alluvial loess section and a typical loess-paleosol section are used to reconstruct regional vegetation history. It is found that the heavy-molecular-weight (HMW) homologues of the n-alkanes in all samples exhibit a pronounced odd-over-even predominance, maximizing at C31 and the abundance of the nC27-alkanes is the lowest in nC27, nC29, nC31, i.e. C27 | ZHONG YanXia CHEN FaHu AN ChengBang XIE ShuCheng HUANG XianYu | 2007 | Chinese Science Bulletin2007，52，12： | 10 |
| 2 | Evolution of prehistoric agriculture in central Gansu Province,China:A case study in Qin'an and Li County显示文摘This study,based on environmental archaeological studies focused on Qin'an County and Li County in Gansu Province,China,shows that during 8-7.3 ka BP few cultivated crop seeds were found.After 6.4 ka BP,during the Banpo period,many crop seeds appeared,indicating the development of agriculture.Millet agriculture in this area appeared and flourished a little later than in the Central Plain of China.Climate change is an important factor that influenced the development of agriculture in this area.The rapid expansion of agriculture during late Yangshao and Changshan benefited from the humid and warm climate in the mid-Holocene,especially the emergence of rice.After 4 ka BP,climate became drier,and agriculture began to decline.So Siwa Culture is characterized by pastoral economy,until the Eastern Zhou period,agriculture began to recover,when wheat and barley appeared in Li County,indicating diversification of agriculture of this time. | AN ChengBang JI DuXue CHEN FaHu DONG GuangHui WANG Hui DONG WeiMiao Zhao XueYe | 2010 | Chinese Science Bulletin2010，55，18： | 10 |
| 3 | Pollen records of Holocene vegetation and climate changes in the Longzhong Basin of the Chinese Loess Plateau显示文摘Pollen records with an average time resolution of 20-200 years from Holocene loess sections at Dingxi, Qin'an, and other localities of Gansu Province reveal a detailed history of vegetation and climate changes in the western Loess Plateau. For most time of the Holocene, the landscape was dominated by grasslands or forest steppes. However, during the middle Holocene (7.5-5.8 ka BP), relatively dense forests developed, and the endemic vegetation flourished, suggesting a much warmer and more humid climate condition than the present. Superimposed upon this general pattern are several dry intervals marked by the episodic expansion of grasslands or forest steppe. Xeric vegetation expanded after 3.8 ka BP, indicating a trend towards dry conditions. | Tang Lingyu An Chengbang | 2007 | Progress in Natural Science:Materials International2007，17，12： | 2 |
| 4 | Holocene moisture evolution in arid central Asia and its out-of-phase relationship with Asian monsoon history显示文摘 | Fahu Chen Zicheng Yu Meilin Yang Emi Ito Sumin Wang David B. Madsen Xiaozhong Huang Yan Zhao Tomonori Sato H. John B. Birks Ian Boomer Jianhui Chen Chengbang An Bernd Wünnemann | 2007 | Quaternary Science Reviews2007，，3： | 2 |
| 5 | Holocene moisture evolution in arid central Asia and its out-of-phase relationship with Asian monsoon history显示文摘 | Fahu Chen Zicheng Yu Meilin Yang Emi Ito Sumin Wang David B. Madsen Xiaozhong Huang Yan Zhao Tomonori Sato H. John B. Birks Ian Boomer Jianhui Chen Chengbang An Bernd Wünnemann | 2007 | Quaternary Science Reviews2007，，3： | 2 |
| 6 | A high-resolu tion record of Holocene environmental and climatic changes from Lake Balikun (Xinjiang, China)= Implications for central Asia显示文摘 | An Chengbang Lu Yanbin Zhao Jiaju | 2011 | The Holocene2011，10，1： | 1 |
| 7 | Modern pollen assemblages and their relationships with vegetation and climate on the northern slopes of the Tianshan Mountains, Xinjiang, China显示文摘The reconstruction of paleovegetation and paleoclimate requires an understanding of the relationships between surface pollen assemblages and modern vegetation and climate.Here,we analyzed the characteristics of surface pollen assemblages across different vegetation zones in the Tianshan Mountains.Using surface pollen analysis and vegetation sample surveys at 75 sites on the northern slopes of the Tianshan Mountains,we determined the correlation between the percentage of dominant pollen types and the corresponding vegetation cover.Redundancy analysis was used to investigate the relationships between surface pollen assemblages and environmental factors.Our results show that the Tianshan Mountains contain several distinct ecological regions,which can be divided into five main vegetation zones from low to high altitudes:mountain desert zone(Hutubi County(HTB):500-1300 m;Qitai County(QT):1000-1600 m),mountain steppe zone(HTB:1400-1600 m;QT:1650-1800 m),mountain forest zone(HTB:1650-2525 m;QT:1850-2450 m),subalpine meadow zone(HTB:2550-2600 m;QT:2500-2600 m),and alpine mat vegetation zone(HTB:2625-2700 m;QT:2625-2750 m).The surface pollen assemblages of different vegetation zones can accurately reflect the characteristics of the mountainous vegetation patterns on the northern slopes of the Tianshan Mountains when excluding the widespread occurrence of Chenopodiaceae,Artemisia,and Picea pollen.Both average annual precipitation(P_(ann))and annual average temperature(T_(ann))affect the distribution of surface pollen assemblages.Moreover,P_(ann) is the primary environmental factor affecting surface pollen assemblages in this region.A significant correlation exists between the pollen percentage and vegetation cover of Picea,Chenopodiaceae,Artemisia,and Asteraceae.Moreover,Picea,Chenopodiaceae,and Artemisia pollen are over-represented compared with their corresponding vegetation cover.The Asteraceae pollen percentage roughly reflects the distribution of a species within the local vegetation.These results have important implications for enhancing our understanding of the relationship between surface pollen assemblages and modern vegetation and climate. | ZHANG Wensheng AN Chengbang LI Yuecong ZHANG Yong LU Chao LIU Luyu ZHANG Yanzhen ZHENG Liyuan LI Bing FU Yang DING Guoqiang | 2023 | Journal of Arid Land2023，15，3： | 0 |
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