摘要
通过对鼎湖山植物样带针阔混交林群落主要木本植物种群数量特征、垂直分布和水平分布格局进行分析,探讨了主要木本植物种群发展趋势和种群维持机制。结果表明:荷木(Schima superba)-马尾松(Pi-nus massoniana)群落中,除马尾松随机分布外,其他主要乔木和灌木种群基本呈聚集分布。荷木是稳定种群,在垂直空间分布较均匀;马尾松是衰退种群,垂直空间分布相对较均匀,在当年生幼苗和苗木层没有个体出现。灌木显示出与乔木不同的更新策略,与乔木相比,灌木有大量的当年生幼苗和幼苗库,其当年生幼苗数量是乔木的19倍。若以相邻龄级个体数量比表示生长阻力,则乔木幼苗进入幼树阶段所受到的生长阻力较大,灌木在任何龄级都受到了较大的生长阻力。同时,灌木层植物种群的空间资源利用相似性和竞争强度高于乔木层种群。从聚集度指标看,随着龄级增加,乔木层种群聚集度逐渐减少,灌木层聚集度逐渐增加。
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. rnassoniana 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.
出处
《南京林业大学学报（自然科学版）》
CAS
CSCD
北大核心
2006年第5期34-38,共5页
Journal of Nanjing Forestry University：Natural Sciences Edition
基金
国家自然科学基金重大项目(39899370)
中国科学院重大项目(KZ951-B1-110)
关键词
针阔混交林
种群结构
空间分布格局
聚集指数
鼎湖山
Mixed coniferous and broadleaf forest
Population structure
Spatial pattern
Aggregation index
Dinghu mountain
