Plant Diversity ›› 2011, Vol. 33 ›› Issue (3): 350-356.doi: 10.3724/SP.J.1143.2011.10242

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Dynamic Changes Analysis on the Main Vegetation Type in the Xiaoxiangling Mountains

 LIU  Shou-Jiang-1, HUANG  You-You-2, HU  Cui-Hua-1   

  1. 1 Land and Resources College, China West Normal University; 2 College of Life Sciences, China West Normal University,
    Key Laboratory of Southwest China Wildlife Resources Conservation, Ministry of Education, Nanchong 637009, China
  • Received:2010-12-24 Online:2011-06-25 Published:2011-02-24

Abstract:

Acquisition and processing information with 3S technology, and combining the principles of landscape ecology with the research methods of traditional vegetation variation, the main vegetation landscape changes of giant panda habitat in the Xiaoxiangling Mountains were quantitatively analyzed from complex mutual-transformation performance and dynamic variation characteristics in nearly 30 years.The conclusions are as follows: (1) The change tendency of the coniferous and broadleaved mixed forest was similar to the coniferous forest,both increased by 17.57% and 7.56% respectively in 30 years; New patches and the original patches were joined together to form large patches complicated boundary, landscape fragmentation degree and landscape evenness index were decreased. (2) Rapid declined in Alpine shrubs in the former 20 years, while gradually increased in the later 8 years, and recovered in size and numbers during this period. But most of the new patches were smaller patches, and the appearance of large number of small patches caused the increase of landscape fragmentation degree and landscape apartness index. (3) Alpine talus vegetation decreased by 6.41% in 30 years; the reduction of the number of small patches resulted in decrease of landscape fragmentation degree and the strengthening of the uniformity of the distribution. The results not only can explain the mechanism of interaction between landscape patterns of the main vegetation and ecological processes in this mountain system, but also expound the direction and process of the dynamic succession or the expansion potential.

Key words:  Vegetation landscape, Optimization supervised classification, Landscape index, Dynamic changes, Xiaoxiangling mountains

CLC Number: 

  • Q 948