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

doi:10.3724/SP.J.1143.2011.10242

Abstract

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

LIU Shou-Jiang-, HUANG You-You-, HU Cui-Hua. Dynamic Changes Analysis on the Main Vegetation Type in the Xiaoxiangling Mountains[J]. Plant Diversity, 2011, 33(3): 350-356.

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[1]	HUANG You-You^, , LIU Shou-Jiang, HU Jin-Yao , QIAO Bo^, , CUI Shi-Fa^, , XU Xiao^, . Gradient Variations in Landscape Pattern from Northwest to Southeast in Tangjiahe Nature Reserve, Sichuan Province [J]. Plant Diversity, 2009, 31(1): 49-56.
[2]	HU Cui-Hua , HUANG You-You^, , LIU Shou-Jiang , XU Wu-Cheng. Analysis on the Patch Characteristics of Vegetation Landscape of Xiaoxiangling Mountains in Sichuan Province [J]. Plant Diversity, 2009, 31(06): 529-536.