干旱区生态环境知识资源中心(Arid): 雅鲁藏布江流域植被格局与NDVI分布的空间响应

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	雅鲁藏布江流域植被格局与NDVI分布的空间响应
其他题名	Vegetation Pattern and Spatial Distribution of NDVI in the Yarlung Zangbo River Basin of China
	陈斌; 李海东; 曹学章; 沈渭寿; 金行
来源期刊	中国沙漠
ISSN	1000-694X
出版年	2015
卷号	35 期号:1 页码:120-128
中文摘要	雅鲁藏布江流域海拔高差约达7 000m,气候条件复杂、生态系统类型多样,植被格局空间变化显著。笔者基于1∶100万植被类型图、SPOT_VEGETATION NDVI数据集和数字高程模型(DEM),综合运用GIS空间分析技术,提取与定量分析了流域主要植被类型、空间分布特征,并结合海拔梯度、气候条件变化探讨了流域植被格局与NDVI空间变化的耦合关系。结果表明:(1)雅鲁藏布江流域植被类型包括针叶林、阔叶林、灌丛、荒漠、草原、草丛、草甸、高山植被等11个植被型组,21个植被型,其中米林宽谷的植被型最多,自下游至上游的山南宽谷、日喀则宽谷及马泉河宽谷随着海拔梯度的变化,植被类型多样性总体呈下降趋势。(2)随着海拔的增加,植被型组和植被型的个数均呈先增大后减小的趋势,以海拔3 000~4 000m和4 000~5 000m最多,流域植被格局的垂直地带性显著。(3)流域植被格局与NDVI变化表现出较好的空间一致性。针叶林、阔叶林和草丛等3个植被型组的NDVI值均以1012月最大,其余8个植被型组的NDVI值均以79月最大、13月最小。海拔3 000m是流域尺度植被格局变化的一个转折点。
英文摘要	The range of elevation is over 7 000 meters a.s.l.in the Yarlung Zangbo River Basin,where climate conditions are very complex and types of ecosystem are diverse,the spatial pattern of vegetation distribution changes greatly.Based on 1∶1 000 000 vegetation map,SPOT_VEGETATION NDVI data sets and digital elevation model(DEM),the dominant vegetation types and theirs spatial distribution in the basin were extracted and analyzed quantitatively with the help of Geographical Information System (GIS).Thereafter, combined with the elevation gradients and climate conditions in different wide valley sections of the basin,we discussed therelationship between vegetation pattern and spatialdistribution of NDVI.(1)There are 11 vegetation type groups(including coniferous forest,broad-leaved forest,bush,desert,grassland, meadow,alpine vegetation,etc.)and 25 vegetation types in the basin.The numbers of vegetation types in the Milin wide valley are the most,while the diversity of vegetation types among Shannan wide valley,Shigatse wide valley and Maquanhe wide valley showed a decrease trend totally from downstream to upstream. (2)The numbers of vegetation type groups and vegetation types both increase at first,and then decreased with the increase of altitude,of which,3 000-4 000 m and 4 000-5 000 m are the most,the vertical zonality of vegetation pattern in the basin is remarkable.(3)The spatial consistency between vegetation pattern and NDVI change isgood in the basin.The greatest NDVI value of coniferous forest,broad-leaved forest and grass vegetation are all in October-December,while the greatest and the least NDVI value of the other 8 vegetation type groups were all in July-September and January-March,respectively.The altitude of 3 000 m is a turning point at which vegetation pattern on the basin scale ofthe Yarlung Zangbo River change significantly.
中文关键词	植被类型 ; 空间分布 ; 青藏高原
英文关键词	NDVI GIS vegetation types NDVI spatial distribution GIS Qinghai-Tibet Plateau
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:5337110
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/233705
作者单位	环境保护部南京环境科学研究所, 南京, 江苏 210042, 中国
推荐引用方式 GB/T 7714	陈斌,李海东,曹学章,等. 雅鲁藏布江流域植被格局与NDVI分布的空间响应[J],2015,35(1):120-128.
APA	陈斌,李海东,曹学章,沈渭寿,&金行.(2015).雅鲁藏布江流域植被格局与NDVI分布的空间响应.中国沙漠,35(1),120-128.
MLA	陈斌,et al."雅鲁藏布江流域植被格局与NDVI分布的空间响应".中国沙漠 35.1(2015):120-128.