摘要
综合利用多种数据源,结合3S技术,分析了岷江上游1986、1995和2000年3个时期的景观格局,重点探讨了森林、草地等主要景观类型在持续人类活动强度作用下的变化,确定了不同景观类型对人类活动强度的敏感程度。结果表明:1)岷江上游景观以草地、森林为主要景观类型。1986、1995和2000年3个时期森林、草地景观类型面积之和均高达96.1%、96.38%和95.23%,其它景观类型作为斑块镶嵌其中,森林和草地共同控制了整个研究区景观格局变化与生态过程;2)不同景观对人类活动强度的敏感性有显著差异。低强度的人类活动有利于有林地景观的恢复;高盖度草地对人类活动很敏感,严格减少干扰活动强度才有利于维持其景观;中盖度草地对中低强度的人类活动(如放牧)很敏感,景观退化,面积减少。
By using multiple data resources and 3 S techniques, this paper analyzed the landscape patterns of Minjiang River upper reach in 1986, 1995 and 2000, with the focus on the responses of main landscape types to the anthropogenic activities. The results showed that in the study area, grassland and forestland were the main landscape types, occupying 96. 1% , 96.38% and 95.23% of the total in 1986, 1995 and 2000, respectively, and other landscape types were scattered in them. These two landscape types controlled the landscape pattern change and ecological processes of the whole study area. Different landscape types had great differences in their responses to anthropogenic activities intensity （AHI）. Low AHI was beneficial to the landscape restoration of forestland; high coverage grassland was sensitive to all grades AHI except grade 1, and only strictly decreasing AHI could maintain its landscape; while medium coverage grassland was sensitive to lower and medium AHI, with the landscape degraded and the area decreased. High intensity management activities could change the landscape patterns to a desirable direction.
出处
《生态学杂志》
CAS
CSCD
北大核心
2007年第5期700-705,共6页
Chinese Journal of Ecology
基金
国家重点基础研究发展规划资助项目(2002CB111506)
关键词
景观格局
人类活动强度
干扰
模糊逻辑
岷江上游
landscape pattern
intensity of anthropogenic activities
disturbance
fuzzy logic
upper reach of Minjiang River.
