RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2016, Vol. 25 >> Issue (05): 777-785.doi: 10.11870/cjlyzyyhj201605011

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SIZE STRUTURE AND SPATIAL DISTRIBUTION OF CUNNINGHAMIA LANCEOLATA POPULATIONS IN CHONGQING SIMIAN MOUNTAINOUS

LU Wei-li1, ZHANG Hong-jiang2, CHENG Qi-bo1, WU Lin3, LI Hong-lin4   

  1. 1. College of Environmental Science and Engineering, Southwest Forestry University, Kunming 650224, China;
    2. College of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China;
    3. School of Information Engineering and Automation, Kunming University of Science & Technology, Kunming 650504, China;
    4. College of Resource Science, Southwest Forestry University, Kunming 650224, China
  • Received:2015-08-20 Revised:2015-12-04 Online:2016-05-20
  • Supported by:
    National Natural Science Foundation of China (61163004);Supported by Key Disciplines (Ecology) Project of Yunnan Education Department (05000511311)

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Abstract: Point pattern analysis of species in a community is important for gaining a better understanding of the underlying ecological processes controlling the observed structure. In this paper, univariate and bivariate spatial point pattern analysis based on the pair-correlation function were used to evaluate the spatial patterns and associations of Cunninghamia lanceolat in Chongqing Simian Mountains. We found that:(1) There were 65 tree species, 31 shrub species and 20 herb species in the study plot. The population of Cunninghamia lanceolat was declining. The mature individuals were dominant, middle-aged were second in Cunninghamia lanceolat species and no young individuals; The young and middle-aged individuals were dominant, no mature individuals in Rhododendron bachii、,Castanopsis orthacantha and Castanopsis fargesii, these population were increasing. (2) At the 0-25 meter scale, the population of Cunninghamia lanceolat showed a random distribution, Castanopsis fargesii and Castanopsis orthacantha exhibited a clumped distribution, while the individuals of Rhododendron bachii, Eurya loquaiana, Symplocos lancifolia and Rhododendron stamineum were significantly clustered and as the scale increased, the distribution became random. (3) Because of biological properties and habitat factors, there was a big difference of spatial association between the main species. Cunninghamia lanceolat showed negative associations with Castanopsis orthacantha and Rhododendron bachii, but no associations with Rhododendron stamineum, Castanopsis fargesii and Symplocos lancifolia. So Rhododendron stamineum,、Castanopsis fargesii and Symplocos lancifolia should be given priority in near-natural reform of pure Cunninghamia lanceolat forest.

Key words: point pattern analysis, size structure, Chongqing Simian Mountainous, Cunninghamia lanceolata populations

CLC Number: 

  • S718
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