干旱区生态环境知识资源中心(Arid): 不同石漠化程度岩溶峰丛洼地系统景观格局的比较

Arid

	不同石漠化程度岩溶峰丛洼地系统景观格局的比较
其他题名	A comparative researches on landscape pattern changes in different rock desertification peak cluster-depressions
	李阳兵; 王世杰; 容丽
来源期刊	地理研究
ISSN	1000-0585
出版年	2005
卷号	24 期号:3 页码:371-378
中文摘要	利用花江岩溶峡谷区南坡不同石漠化程度的5个独立的岩溶峰丛洼地系统景观要素的实测数据,分析了多样性、优势度、破碎度、分离度等景观格局指标的变化规律及其所指示的生态学意义.结果表明,这些指标在不同峰丛洼地系统都能较好地评价石漠化过程中景观格局的动态变化规律,对分析石漠化土地的发展趋势具有较好的指示意义.但多样性指数、优势度指数、均匀度指数也与各峰丛洼地系统的景观基质有关,在不同石漠化程度的峰丛洼地系统中,反映的景观生态意义是不一样的.景观格局分析不仅强调面积,而且还考虑所研究石漠化土地的空间分布特征(格局)、景观组成特点与石漠化过程的关系和对石漠化的影响,在石漠化程度判定和石漠化指标的研究中景观格局是一个不可忽视的问题.
英文摘要	Karst rocky desertification is a kind of land degradation which has happened in fragile karst mountain ecosystem in Southwest China. The unsuited matching at vertical direction and unreasonable special distribution at horizontal direction of landscape use make the landscape degradation a major problem in karst mountain areas. But little is be-ing understood about the interrelation between the spatial distribution of rocky desertified land and the rocky desertification processes. This paper analyzes the ecological conditions of 5 special peak cluster-depressions which jire at different desertification degrees on the southern slope of Huajiang karst gorge based on field investigation, the change of land-scape pattern indexes and their ecological significance, in order to understand the ecologi-cal spatial character and evolving procedure of karst mountains from landscape ecological viewpoint. Results indicate that the diversity index, dominance index and evenness index relate closely to the landscape matrix of peak cluster-depressions, and show different ecological significance in different rocky desertified peak cluster-depressions. With the increase of rocky desertification intensity, the diversity index is in a decreasing trend while dominance index in an increasing trend significantly, the evenness index decreases firstly and then in-creases when rocky desertification develops further, the isolation and patch area of naked rock increase gradually but isolation of grasslands, shrub and woodlands increases while their patches area in a reduction. The landscape of potential rocky desertified peak cluster-depressions is even more seriously fragmentized than light and moderate rocky desertified peak cluster-depressions, and fragmentation is most in all peak cluster-depressions. The landscape patterns and development modes of potential rocky desertified and strong rocky desertified peak cluster-depressions represent two typical types of rocky desertification in southwest karst mountain areas. This paper shows that the processes of karst ecosystem rocky desertification depends on the distribution, fragmentation and conjunction, not merely the absolute quantity scale of naked rocks and vegetation. The analysis of landscape pattern emphasizes not only area, but also the re-lations and influence among rocky desertification processes, the spacial pattern of rocky desertifi-cation and landscape element character, therefore, landscape should not be neglected in the stud-ies of rocky desertification degree and indexes, landscape patterns, landscape diversity and pat-ches closely correlating with rocky desertification process must be taken into account in the as-sessment of the karst rock desertification degrees.
中文关键词	景观格局 ; 石漠化 ; 花江峡谷区
英文关键词	silandscape pattern rocky desertification Huajiang karst gorge
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOSCIENCES MULTIDISCIPLINARY
WOS研究方向	Geology
CSCD记录号	CSCD:1991149
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/206015
作者单位	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
推荐引用方式 GB/T 7714	李阳兵,王世杰,容丽. 不同石漠化程度岩溶峰丛洼地系统景观格局的比较[J],2005,24(3):371-378.
APA	李阳兵,王世杰,&容丽.(2005).不同石漠化程度岩溶峰丛洼地系统景观格局的比较.地理研究,24(3),371-378.
MLA	李阳兵,et al."不同石漠化程度岩溶峰丛洼地系统景观格局的比较".地理研究 24.3(2005):371-378.