摘要
喀斯特地区是中国典型的生态脆弱区,其生态环境问题严重制约着当地经济的发展。本文基于遥感影像和高程数据,通过遥感图像处理软件Erdas、地理信息系统软件Arc-GIS和景观格局分析软件包Fragstats,研究了喀斯特区域广西环江县2000年景观空间格局随高程的分异特征。结果表明:环江县地貌类型以丘陵和低山为主,景观类型以林地、灌木地为主;人为景观类型主要分布在地势低的高程带,受人类活动影响较小的自然景观类型主要分布在地势高的地区;景观格局受高程和人类活动的影响显著,在地势较低而人类活动频繁的高程带,景观破碎化程度高,景观类型多样,结构复杂;在地势较高而人类活动参与少的高程带,景观破碎化程度低,景观类型单一,结构简单;丘陵带由于位于旱地、林地、灌木和农村居民用地交错带,其景观格局复杂,具有易变性,是景观格局最复杂的高程带。
Karst area is a typical ecologically fragile region where the economy development is restricted by eco-environmental problems. In this paper, based on the remote images and elevation data, the heterogeneity of landscape pattern with elevation in karst area in Huanjiang of Guangxi Province in 2000 was studied by using Erdas, ArcGIS and Fragstats programs. The results showed that in Huanjiang County, foothill and hill were the main geomorphic types, and woodland and shrub land were the main landscape types. Anthropogenic landscape types mainly lied in low-altitude zones, while natural landscape types mainly distributed in high-altitude zones. Landscape patterns were evidently affected by elevation and human activities. In low-attitude zones with frequent human activities, landscape was highly fragmented, diverse, and complex; while in high-attitude zones with less human activities, landscape was lowly fragmented, simplex, and simple. Because foothill was the ecotone among upland, woodland, shrub land and rural residence, its landscape pattern was complex and fugitive, being the most complex elevation zone.
出处
《生态学杂志》
CAS
CSCD
北大核心
2008年第7期1156-1160,共5页
Chinese Journal of Ecology
基金
中国科学院西部行动计划项目(KZCX2-XB2-08)
中国科学院“西部之光”人才培养计划资助项目
关键词
广西环江县
喀斯特
空间格局
高程
Huanjiang County of Guangxi Province
karst area
spatial pattern
elevation.
