干旱区生态环境知识资源中心(Arid): 典型峰丛洼地耕地、聚落及其与喀斯特石漠化的相互关系案例研究

Arid

	典型峰丛洼地耕地、聚落及其与喀斯特石漠化的相互关系案例研究
其他题名	The correlations among arable land, settlement and karst rocky desertification-cases study based on typical peak-cluster depression
	李阳兵 1; 罗光杰 2; 白晓永 3; 王永艳 4; 王世杰3 ; 谢静 1; 杨广斌 1
来源期刊	生态学报
ISSN	1000-0933
出版年	2014
卷号	34 期号:9 页码:2195-2207
中文摘要	喀斯特石漠化,近年来已成为研究热点和引起国家层面重视,但当前研究并没揭示岩溶山地土地为什么会发生石漠化这一现象的?质,没有阐明岩溶山地农户为什么要进行不合理活动。通过典型案例研究从理论上解释岩溶山地农户为什么要进行不合理活动这个问题,以从?质上揭示石漠化发生的机理。为此,在贵州选择了6个典型峰丛洼地,采用2010年的10 m分辨率ALOS影像作为数据源,比较了6种不同的峰丛洼地组合地形中的耕地资源分布、聚落特征和石漠化发育情况。结果表明,6个研究点耕地和聚落数量、分布和石漠化的面积和分布存在一定的相互关系,这些相互关系可阐明土地承载力较低情形、土地承载力中等情形和土地承载力较高情形石漠化发生的过程;发现严重的石漠化只能出现在土地承载力低、人口压力大的区域,并据此进一步总结了峰丛洼地区石漠化形成的理论模型。从理论上揭示了峰丛洼地区土地承载力和人口压力是否协调决定了峰丛洼地区的生态质量状况,有助于从?质上认识石漠化的发生机理和指导石漠化的治理。
英文摘要	The Karst Rocky Desertification (KRD) occurred in Southwest China has become a research hotspot and drawn great attention of the Chinese government in recent years. However, the current researches about KRD has not revealed the essential reason why the KRD phenomenon occurred in karst mountains, and has not clarified why the local farmers had undertaken unreasonable agricultural activity in karst mountain areas. This paper attempted to discover theoretically the reason why the local farmers in karst mountain areas carried out irrational activities such as the steep slope land cultivations, and to reveal essentially the occurrence mechanism of KRD through the typical case studies. Firstly, this paper assumes that the low land capacity is the genesis cause of KRD in peak-cluster depression areas. Furthermore,ecological quality of the peak cluster depression zone is determined by the relationship between the area of depressions (negative terrain) and the population of residential area. So, six typical of peak-cluster depression areas of Guizhou province were selected to compare the distribution circumstances of cropland, the characteristics of settlements and the formation of KRD with the help of Alos images in 2010 (with a resolution of 10 mx10 m). The results show that the areas such as closed peak-cluster depression of continuous distribution, shallow peak-cluster depressions and assemblages of peak-cluster depression and canyon are lack of cropland resources, but some terrain such as peak-cluster depression group embraced by flat land and not closed peak-cluster depression are rich in cropland, and the cropland distributed in spatial array of peak-cluster depression, peak-cluster valley and gully area is relatively fewer. There is a negative correlation between the percentage of the cultivated land and the percentage of KRD (including light KRD, moderate KRD and severe KRD) at peak- cluster depressions,serious KRD distributes in the peak-cluster depressions with higher percent of the settlement accounted for the cropland area. It is related to some extent, in the six study areas,between the quantity and spatial distribution of arable land and settlements, and the size and spatial distribution of KRD. The relationship could be concluded as three situations of the process of KRD, where are low, middle and upper carrying capacity of land. The serious KRD is found distribute only in peak-cluster depression areas with fewer flatland, low land capacity and high population pressure, therefore, the theory hypothesis suggested by this paper is correct, to improve the bearing capacity of land should be the primary means to desertification control in peal-cluster depressions. The theoretical models of KRD occurrence mechanism in these areas were summarized further through the comparisons of the arable land resources distribution, the characteristics of settlement and the KRD occurrence situations in these six different peak cluster depression combined topography. The ecological qualities are dominated by the harmonization between land capacity and population pressure in the peak cluster depression areas. And this finding will make contribution to understand essentially the occurrence mechanism of KRD and be guidance to the ecological restoration of KRD land.
中文关键词	峰丛洼地 ; 聚落 ; 耕地 ; 石漠化
英文关键词	peak-cluster depression settlement arable land karst rocky desertification
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:5138459
来源机构	贵州师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/231576
作者单位	1.贵州师范大学地理与环境科学学院, 贵阳, 贵州 550001, 中国; 2.贵州师范学院地理与旅游学院, 贵阳, 贵州 550018, 中国; 3.中国科学院地球化学研究所, 环境地球化学国家重点实验室, 贵阳, 贵州 550002, 中国; 4.重庆师范大学地理与旅游学院, 重庆 400047, 中国
推荐引用方式 GB/T 7714	李阳兵,罗光杰,白晓永,等. 典型峰丛洼地耕地、聚落及其与喀斯特石漠化的相互关系案例研究[J]. 贵州师范大学,2014,34(9):2195-2207.
APA	李阳兵.,罗光杰.,白晓永.,王永艳.,王世杰.,...&杨广斌.(2014).典型峰丛洼地耕地、聚落及其与喀斯特石漠化的相互关系案例研究.生态学报,34(9),2195-2207.
MLA	李阳兵,et al."典型峰丛洼地耕地、聚落及其与喀斯特石漠化的相互关系案例研究".生态学报 34.9(2014):2195-2207.