干旱区生态环境知识资源中心(Arid): 基于RBFN的桂西北喀斯特区植被碳密度空间分布影响因素分析

Arid

	基于RBFN的桂西北喀斯特区植被碳密度空间分布影响因素分析
其他题名	Factors influencing the spatial distribution of vegetation carbon density in karst landscapes of Northwest Guangxi: a case study based on radial basis function network model
	张明阳 1; 王克林 1; 邓振华 2; 刘会玉 3; 岳跃民 1; 段亚锋 1
来源期刊	生态学报
ISSN	1000-0933
出版年	2014
卷号	34 期号:12 页码:3472-3479
中文摘要	在2010年植被碳密度空间分布结果的基础上,通过13个环境因子的1377个样点数据,建立径向基函数网络(Radial Basis Function Network,RBFN)模型,对桂西北喀斯特区植被碳密度空间分布的影响因素进行了初步探讨。研究结果显示:对该区植被碳密度空间分布影响最为重要的前4位为地类、森林类型、林种和植被类型4个因子,其标准化重要性分别在50% 以上;其次为石漠化程度、腐殖层厚度、面积等级、植被总覆盖度和土层厚度5个因子,其标准化的重要性分别在15%-30%;影响最小的是坡位、坡度、坡向和海拔4个地形因子,其标准化重要性仅2%-11%。研究表明地形因子对植被碳密度空间分布影响有限,更为重要的是土地类型、森林类型、林种和植被类型等可通过人为活动改变的因素,因此生态环境移民、退耕还林等石漠化治理措施对植被碳密度空间分布具有重要影响。
英文摘要	Karst landscapes in Southwest China may be an important carbon sink after the implementation of ecological engineering. The carbon pool in vegetation plays a more important role in the ecosystem carbon budget than that in shallow soils with a limited carbon savings. However,due to the special nature of the geological settings of the Karst region,the spatial distribution of vegetation has a three-dimensional characteristics of discontinuity and fragmentation,which results in the difficulty in obtaining the belowground section of vegetation. This study examined the influencing factors on spatial distribution of vegetation carbon density in the karst area of northwest Guangxi,China,based on 1377 samples of 13 environment factors investigated in 2010 and the model of radial basis function network. The results show that: the four most important impact factors on the spatial distribution of vegetation carbon density are land type,forest type,forest category and vegetation type,and the significance of standardization above 50% for all of these factors; The second group of important impact factors are rocky desertification degree,humus layer thickness,size class,overall vegetation cover and soil thickness,and the significance of standardization is about 15%-30%; The least important factors on the spatial distribution of vegetation carbon density are location,slope,aspect and elevation,and the importance of standardization is only 2%-11%. Our study indicates that,and land type,forest type,forest category and vegetation type changed by human activities are the predominant factors in controlling the spatial distribution of vegetation carbon density,and the impact of topographic factors on are limited. This study suggests that the eco-environment immigration,returning farmland to forests,rocky desertification control measures have positive impacts on the spatial distribution of vegetation carbon density.
中文关键词	桂西北 ; 喀斯特 ; 植被碳密度 ; 影响因素 ; 径向基函数网络模型
英文关键词	Northwest Guangxi karst vegetation carbon density impact factors radial basis function network model
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:5188694
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/231591
作者单位	1.中国科学院亚热带农业生态研究所, 中国科学院亚热带农业生态过程重点实验室, 长沙, 湖南 410125, 中国; 2.国家电网湖南省电力公司东江水力发电厂, 资兴, 423403; 3.南京师范大学地理科学学院, 南京, 江苏 210046, 中国
推荐引用方式 GB/T 7714	张明阳,王克林,邓振华,等. 基于RBFN的桂西北喀斯特区植被碳密度空间分布影响因素分析[J],2014,34(12):3472-3479.
APA	张明阳,王克林,邓振华,刘会玉,岳跃民,&段亚锋.(2014).基于RBFN的桂西北喀斯特区植被碳密度空间分布影响因素分析.生态学报,34(12),3472-3479.
MLA	张明阳,et al."基于RBFN的桂西北喀斯特区植被碳密度空间分布影响因素分析".生态学报 34.12(2014):3472-3479.