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Scientia Silvae Sinicae ›› 2014, Vol. 50 ›› Issue (4): 15-21.doi: 10.11707/j.1001-7488.20140403

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Impacts of Different Logging Methods on Phylogenetic Structure in Tropical Montane Ra inforest of Hainan Island, China

Bu Wensheng1, Xu Han2, Zang Runguo1, Ding Yi1, Zhang Junyan1, Lin Mingxian2   

  1. 1. Key Laboratory of Forest Ecology and Environment of State Forestry Administration Institute of Forest Ecology, Environment and Protection, CAF Beijing 100091;
    2. Research Institute of Tropical Forestry, CAF Guangzhou 510520
  • Received:2013-01-29 Revised:2014-03-03 Online:2014-04-25 Published:2014-05-06
  • Contact: 臧润国

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Abstract:

Old growth stands and the secondary stands which were naturally regenerated from selective logging or clear-cutting of old growth forest about 40 years ago in the tropical montane rainforest of Hainan Island were surveyed and compared. All trees and shrubs with diameter at breast height (DBH) ≥1 cm were identified and measured, and environmental variables were measured in each plot. The variations of community composition and phylogenetic structure among different stands were examined by ANOVA to analyze the effect of the different disturbances. The multiple stepwise regression was used explore effects of the key environmental factors on the phylogenetic structure in different stands. The results showed that species richness of the secondary stands, on the 40 years recovery, almost reached to the level of old-growth forest. Abundances of saplings and young trees in the secondary stands were significantly higher than those in old-growth stands, whereas the basal area in the secondary stands was significantly lower than that in old-growth stands. Phylogenetic structures of saplings and all individuals changed from clustered to diverged, whereas phylogenetic structure of adult trees was opposite and phylogenetic structure of young trees was nearly random from old growth stands, the secondary stands recovered from selective logging to the secondary stands recovered from clear-cutting. In old-growth forest, phylogenetic structure of community was more clustered at high elevation than that at low elevation for all diameter classes. In the secondary stands recovered from selective logging, phylogenetic structure of community was more overdispersed under higher soil water content than that under lower soil water content in all diameter classes except for adult trees. In the secondary stands recovered from clear-cutting, contrasting to young trees and adult trees, phylogenetic structure of the saplings was more clustered in higher soil organic matter content than that in lower soil organic matter content.

Key words: community assembly, disturbance regime, habitat filtering, logging methods, net relatedness index, size classes

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