干旱区生态环境知识资源中心(Arid): 西藏拉萨河流域中下游不同植被类型表土花粉组合特征与年均降水量关系的研究

Arid

	西藏拉萨河流域中下游不同植被类型表土花粉组合特征与年均降水量关系的研究
其他题名	RELATIONSHIP BETWEEN SURFACE POLLEN ASSEMBLAGE AND MEAN ANNUAL PRECIPITATION IN THE MIDDLE AND LOWER REACHES OF THE LHASA RIVER REGION, SOUTHERN TIBET, CHINA
	庞有智 1; 拉多 2; 张燕杰 2; 李春海 3; 许斌 1
来源期刊	微体古生物学报
ISSN	1000-0674
出版年	2017
卷号	34 期号:2 页码:160-168
中文摘要	为定量恢复西藏拉萨河流域全新世的古气候环境,作者对拉萨河流域中下游表土孢粉组合特征与植被以及降雨量分布的相关性进行了研究。表土花粉研究结果显示,拉萨河流域中下游表土花粉组合能较好反映样方植被群落特征。根据研究区域孢粉组合特征,拉萨河流域中下游主要划分为8个孢粉组合带,即高山沼泽草甸带、高山灌丛草甸带、亚高山灌丛带、桦木林带、河谷沙棘林带、亚高山草甸带、亚高山半荒漠灌丛带和亚高山荒漠带。花粉类型与年均降水量的相关性分析结果表明,乔灌木花粉含量、Cy/G+A比值、莎草科、蓼属均与年均降水量呈显著正相关,而草本花粉含量、禾本科、蒿属、藜科与年均降水量呈显著负相关。因此,年均降水量是影响拉萨河中下游植被类型和表土花粉组合特征的重要因素。
英文摘要	In order to reveal climate control on the modern pollen and provide a more reliable parameter for quantitative reconstruction of the Holocene paleoclimate in the Lhasa river region,Southern Tibet,twenty-nine surface pollen samples from different vegetation types were analyzed. We examined the relationships between the surface pollen assemblages and the original vegetation,and between the pollen types and the mean annual precipitation. The results show that the surface pollen assemblage can well reflect the plant community features of sampling areas. Based on the pollen charater,Lhasa river region includes eight vegetation types,such as alpine swamp meadow,alpine shrub meadow, subalpine shrubs, birch forest,sea-buckthorn forest in valley, subalpine meadow, subalpine semi-desert shrubs and subalpine desert. The mean annual precipitation is positively correlated with the Cy/(G+A) ratio, the percentages of tree-shrub pollens, Cyperaceae and Polygonum, and negatively correlated with the percentages of herb pollens, Gramineae, Artemisia and Chenopodiaceae. The study demonstrates that the mean annual precipitation is an important factor for the distribution of vegetation types and pollen types in the Lhasa river region.
中文关键词	表土花粉 ; Cy/G+A比值 ; 相关性分析 ; 拉萨河流域 ; 西藏
英文关键词	Surface pollen Cy/G + A ratio correlation analysis Lhasa river region Southern Tibet China
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:6040046
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/236775
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. 西藏拉萨河流域中下游不同植被类型表土花粉组合特征与年均降水量关系的研究[J],2017,34(2):160-168.
APA	庞有智,拉多,张燕杰,李春海,&许斌.(2017).西藏拉萨河流域中下游不同植被类型表土花粉组合特征与年均降水量关系的研究.微体古生物学报,34(2),160-168.
MLA	庞有智,et al."西藏拉萨河流域中下游不同植被类型表土花粉组合特征与年均降水量关系的研究".微体古生物学报 34.2(2017):160-168.