RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2009, Vol. 18 >> Issue (12): 1187-.

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GRADIENT ANALYSIS OF LANDSCAPE PATTERN IN KARST AREA UNDER EFFECTS OF ANTHROPOGENIC ACTIVITIES

ZHANG Xiaonan1|2|3| WANG Kelin1|2| ZHANG Mingyang1|2|3| ZHANG Wei1|2| FAN Feide1|2|3
    

  1. (1.Institute of Subtropical Agriculture| Chinese Academy of Sciences| Changsha 410125| China； 
    2.Huanjiang Observation and Research Station of Karst Ecosystem| Chinese Academy of Sciences| Huanjiang 547100| China； 
    3.Graduate University of Chinese Academy of Sciences| Beijing 100049| China)
  • Online:2009-12-20

Abstract:

With the support of ARCGIS and landscape pattern analysis software FRACSTATS 33，the landscape spatial patterns of the karst areas experiencing different intensity of  anthropogenic activities in Huanjiang of Guangxi Province were analyzed on the landscape level and the class level.The results showed that landscape types of Huanjiang County presented unevenness tendencies，and forest was the landscape matrix.Gradient analysis with the landscapelevel index showed that，with the decrease of anthropogenic activity，the landscape in anthropogenic activity zone was becoming less fragmented，landscape shape was becoming more complicated，and landscape aggregation degree was becoming higher.Gradient analysis with the classlevel index showed that，the landscape spatial patterns of the main landscape types in the study area could reflect the gradient variation well，especially the percentage of landscape，fractal dimension index and fragmentation index，whereas the gradient difference of aggregation index and connectivity index were relatively low.Gradient variations in landscape pattern along anthropogenic activities were clearly presented，and this would be useful to supply fine ground and knowledge for exploiting resources reasonably and establishing sustainable development plan in the study area.

Key words: Guangxi/ karst area/ intensity of anthropogenic activities/ landscape pattern

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