关键词: 黄山, 水榆花楸, 群落结构

Abstract: [Objective] The aim of this paper was to understand the structure of Sorbus alnifolia in Huangshan and to provide a basis for its protection and development. [Method] Species composition and community structure of S. alnifolia was analyzed by typical sampling plot method. [Results] ① There were 132 vascular plants, which belonged to 98 genera and 87 families in the 3 200 m² quadrats; ② Important value analysis showed that Pinus taiwanensis and Sasa sinica in the tree layer and shrub layer were more dominant, with a coverage of 21.47% and 26.99%, respectively; ③ The genera of community flora could be divided into 11 distribution types and north temperate zone plate as the main component. The world distribution Pantropic and East asian element assume a definite proportion and the plant flora had evidently characteristics of transition; ④ Phanerophytes(52 species of plants) were dominant in the life-form, followed by chamaephytes and hemicryptophytes; ⑤ According to the analyses of Raunkiaer frequency law, species abundance pattern was vided into five grades(A > B > C < D > E). ⑥ The species were uneven distribution in the community. [Conclusion] The species in Sorbus alnifolia community of Huangshan was abundant. The competition of shrub layer was fierce. If there was no sufficient regeneration seedlings, S. alnifolia would be degraded.

Key words: Huangshan Mountain, Sorbus alnifolia, community structure