【摘要】 根据对后河国家级自然保护区水丝梨群落 2 4 0 0 m2样地调查资料 ,从群落物种组成、乔木层物种多样性、种群结构等方面进行了分析。群落物种组成较为丰富 ,共发现维管植物 92种 ,隶属于 5 4个科 ,80个属 ,乔木层物种相对较少 ,水丝梨优势度显著 ,乔木物种多样性随海拔高度增加而递减 ,少量的人为干扰下的水丝梨群落多样性较高。种群分布格局多呈随机分布 ,种群发育已进入成熟型阶段 ,但幼苗幼树较少 ,有可能对群落的更新与稳定产生影响。更多还原

【Abstract】 The characteristic of the community composition and structure as well as the population structure and the spatial distribution pattern of Sycopsis sinensis were studied in 2400 m2 plots in Houhe Nature Reserve, Hubei Province. The results are as follows: species diversity is rich in Sycopsis sinensis community, including 92 vascular plants which belong to 80 genera, 54 families. Sycopsis sinensis is the dominator in the community, and the percentage of its important value amounts to 50.95% in arbor layer. With the increment of the elevation, the total species diversity indicates the tendency of decreasing. The seedlings and the saplings of Sycopsis sinensis in the community are scarce, which may limit the recruitment and development of Sycopsis sinensis population. The general tendency reflected by the spatial distribution pattern shows that the most clumped distribution appeals in the scale of 6 m×6 m . Soil and heterogeneous micro-terrain may be the major ecological factors influencing the characteristics of the community.更多还原