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Chinese Journal of Applied Ecology ›› 2025, Vol. 36 ›› Issue (2): 427-436.doi: 10.13287/j.1001-9332.202502.003

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Interspecific association of main tree species in Ormosia microphylla community and its community stability.

LI Kejia1, CAI Chen1, RUAN Guangming2, LING Shuwei1, PAN Biaozhi3, ZHOU Jiagui4, LIU Jinfu1, ZHENG Shiqun1*   

  1. 1College of Forestry/College of Juncao Science and Ecology/College of Carbon Neutrality, Fujian Agriculture and Forestry University, Fuzhou 350002, China;
    2Longyan City Landscaping Center, Longyan 364000, Fujian, China;
    3Forest Investigation and Planning Institute of Fujian Province, Fuzhou 350003, China;
    4Forestry Bureau of Shanghang County, Longyan 364200, Fujian, China
  • Received:2024-10-09 Accepted:2024-12-01 Online:2025-02-18 Published:2025-08-18

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Abstract: We investigated the interspecific relationships of Ormosia microphylla community in geomantic forest of Gutian Meeting site. The results showed that the main tree species in the arbor layer included Neolitsea aurata, Schima superba, Castanopsis carlesii, etc. while that in the shrub layer included Dendropanax proteus, Castanopsis fargesii, Diplospora dubia, etc. In the arbor layer, the niche breadth of O. microphylla was 21.04, and its niche overlap with the main tree species was low. The variance ratio and statistics of the main tree species in arbor layer were 0.77 and 59.57, respectively, indicating no significant association in arbor layer. In the χ2 test, there were 101 pairs of non-significant species pairs, and the logarithm ratio of positive and negative association species was 1: 1.18, indicating that the interspecific association was weak. In the shrub layer, the niche breadth of O. microphylla was 21.60. There was a high niche overlap between the main tree species in the shrub layer. The variance ratio and statistics of the shrub layer main tree species were 1.80 and 138.68, respectively, indicating significantly positive overall association in shrub layer. In the χ2 test, there were 107 pairs of significant species pairs, and the logarithm ratio of positive and negative association species was 1:0.09, indicating that the interspecific competition was strong. The Euclidean distances for the arbor and shrub layers were 6.40 and 4.91, respectively, suggesting the shrub layer was more stable than the arbor layer. In the shrub layer, there was a close relationship between O. microphylla and other main tree species. Due to intense resource competition, especially among the dominant species in the community, O. microphylla failed to achieve a dominant position as it grew into a mature tree. Therefore, there was an urgent need to implement artificial intervention measures and in-situ conservation strategies.

Key words: Ormosia microphylla; niche; interspecific association; community stability; geomantic forest