The Regeneration Strategies and Spatial Pattern of Woody Species in the Mixed Coniferous and Broadleaf Forest in Dinghu Mountains

On the basis of measuring the woody species composition in Schima superba and Pinus massoniana community of a permanent plant transect,which is 10m×1200m along a altitude from 50~480m above sea level,on Dinghushan Biosphere Reserve,the quantity traits,the distribution in vertical layers and spatial pattern of the dominant woody species were analyzed,the regeneration strategy and structure traits of the community were studied.The results are as follows: the spatial patterns of the wood species in arbor layer and shrub layer were aggregated distribution except P.massoniana which were random distribution in mature-layer and old-layer.The population of S.superba was stable in the community,where individuals were dispersed in vertical layers evenly.The population of P.massoniana was on declining trend,no individuals appeared in seedling layers.The shrub species use different regeneration strategy with that the tree species use.There are much more seedlings of shrub species than that of tree species.The much more growth resistance of arbor species appeared at the stages from seedling to juvenile.For the shrub species,growth resistance was high in each stage.Meanwhile,the similarity index using space resources among the shrub species was higher than that in tree layer.Same result was concluded from species competition,too.In general,with growing, the trend of aggregation of population in tree layer was decrease and the reverse result was found in the shrub layer.