Effect of Topography and Accessibility on Vegetation Dynamic Pattern in Mountain-hill Region

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > Journal of Mountain Science > Journal of Mountain Science-2012 > Vol9 No.6

	Effect of Topography and Accessibility on Vegetation Dynamic Pattern in Mountain-hill Region
	QIU Bingwen ; ZHONG Ming ; ZENG Canying ; TANG Zhenghong ; CHEN Chongcheng
刊名	Journal of Mountain Science
	2012-12
卷号	9 期号:6 页码:879-890
关键词	Vegetation phenology Elevation gradient Accessibility Geographic weighted regression Enhanced Vegetation Index Spatial non-stationality
通讯作者	QIU Bingwen
英文摘要	Knowledge of both vegetation distribution pattern and phenology changes is very important. Their complicated relationship with elevation and accessibility were explored through a geographically weighted regression (GWR) framework in Fujian province, China. The 16-day time series of 250 m Moderate Resolution Imaging Spectroradiometer (MODIS) Enhanced Vegetation Index (EVI) dataset from 2000 to 2010 was applied. Wavelet transform method was adopted to decompose the original time series and construct the annual maximum EVI and amplitude of the annual phenological cycle. Candidate explaining factors included topographic conditions, accessibility variables and proportions of primary vegetation types. Results revealed very strong positive influence from parameters of elevation and accessibility to big rivers and negative effect from accessibility to resident on both maximum EVI and phenological magnitude through ordinary linear least square (OLS) regression analysis. GWR analysis revealed that spatially, the parameters of topography and accessibility had a very complex relationship with both maximum EVI and phenology magnitude, as a result of the various combinations of environmental factors, vegetation composition and also intensive anthropogenic impact. Apart from the continuously increasing trend of phenology magnitude with increasing altitude, the influence of topography and accessibility on maximum EVI and phenological magnitude generally decreased, even from strongly positive to negative, with increasing altitude or distance. Specially, the most rapid change of correlation coefficient between them was observed within a low elevation or close distance; less variation was discovered within a certain range of medium altitude or distance and their relationship might change above this range. Non-stationary approaches are needed to better characterize the complex vegetation dynamic pattern in Mountain-hill Region.
收录类别	SCI
语种	英语
公开日期	2013-04-18
内容类型	期刊论文
源URL	[http://192.168.143.20:8080/handle/131551/5156]
专题	成都山地灾害与环境研究所_Journal of Mountain Science _Journal of Mountain Science-2012_Vol9 No.6
推荐引用方式 GB/T 7714	QIU Bingwen,ZHONG Ming,ZENG Canying,et al. Effect of Topography and Accessibility on Vegetation Dynamic Pattern in Mountain-hill Region[J]. Journal of Mountain Science,2012,9(6):879-890.
APA	QIU Bingwen,ZHONG Ming,ZENG Canying,TANG Zhenghong,&CHEN Chongcheng.(2012).Effect of Topography and Accessibility on Vegetation Dynamic Pattern in Mountain-hill Region.Journal of Mountain Science,9(6),879-890.
MLA	QIU Bingwen,et al."Effect of Topography and Accessibility on Vegetation Dynamic Pattern in Mountain-hill Region".Journal of Mountain Science 9.6(2012):879-890.