干旱区生态环境知识资源中心(Arid): 青藏高原南部拉萨半干旱河谷表土花粉与区域植被的关系研究

Arid

	青藏高原南部拉萨半干旱河谷表土花粉与区域植被的关系研究
其他题名	RELATIONSHIP BETWEEN SURFACE POLLEN ASSEMBLAGE AND REGIONAL VEGETATION IN A SEMI-ARID VALLEY, THE LHASA RIVER BASIN IN SOUTHERN XIZANG (TIBET)
	庞有智 1; 拉多 2; 张燕杰 2; 李春海 3
来源期刊	古生物学报
ISSN	0001-6616
出版年	2016
卷号	55 期号:4 页码:508-517
中文摘要	对拉萨半干旱河谷表土花粉和冲积物样品进行对比分析,结果表明,拉萨半干旱河谷的表土花粉组合能较好反映样方植被群落特征,而河流冲积物表层花粉样中,拉萨河中游样品花粉组合能较好地反映其中上游流域植被的总体面貌,下游段河流冲积物花粉组合主要反映河道周围湿地植被群落特征。主成分分析(PCA)结果说明,前两个因子轴的累计贡献率为41.9%,较好地解释了该区域花粉种属的分布与两个轴之间的关系。同时,研究区表土花粉莎草科/(禾本科+蒿属)Cy/(G+A)值由拉萨河中游至下游逐渐减小,反映该流域的湿度从东到西逐渐降低。
英文摘要	Modern pollen samples from surface soils and alluvial sediments in the Lhasa River basin were conducted to examine the relationship between the surface pollen assemblage and the original vegetation. Here we present results of modern pollen assemblage to compare the possible differences in representing the surrounding vegetation. The results showed that the surface soils pollen assemblage can well reflect the plant community features in the sampling sites and surrounding areas, while the alluvial pollen samples collected from the middle reaches of the Lhasa River can reflect the appearance of the overall vegetation in the upper and middle reaches of the Lhasa River basin and the other alluvial pollen samples collected from the downstream section of the Lhasa River mainly reflect the vegetation community characteristics of surrounding marshy and swamp wetlands of the river. Principal component analysis ( PCA ) results indicated that the cumulative contribution of the first two PCA axes reach up to 41. 9 % and explained that the distributions of pollen types are mainly controlled by the two factors representing by the first two axes. Also,the mean ratio of Cy/(G+A) from surface pollen decreased from the middle reaches of the Lhasa River to its downstream position. This may indicate that the humidity in the basin gradually decreases along the Lhasa Valley.
中文关键词	表土花粉 ; 冲积物花粉 ; 区域植被 ; 青藏高原南部
英文关键词	Surface pollen alluvial pollen regional vegetation southern Qinghai-Xizang Plateau
语种	中文
国家	中国
收录类别	CSCD
WOS类目	BIOLOGY
WOS研究方向	Life Sciences & Biomedicine - Other Topics
CSCD记录号	CSCD:5883687
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/234422
作者单位	1.内江师范学院地理与资源科学学院, 内江, 641100; 2.西藏大学理学院生命科学系, 拉萨, 西藏 850000, 中国; 3.中国科学院南京地理与湖泊研究所, 湖泊与环境国家重点实验室, 南京, 江苏 210008, 中国
推荐引用方式 GB/T 7714	庞有智,拉多,张燕杰,等. 青藏高原南部拉萨半干旱河谷表土花粉与区域植被的关系研究[J],2016,55(4):508-517.
APA	庞有智,拉多,张燕杰,&李春海.(2016).青藏高原南部拉萨半干旱河谷表土花粉与区域植被的关系研究.古生物学报,55(4),508-517.
MLA	庞有智,et al."青藏高原南部拉萨半干旱河谷表土花粉与区域植被的关系研究".古生物学报 55.4(2016):508-517.