在广东鼎湖山国家级自然保护区河岸林设置30个样地，研究水翁蒲桃(Syzygium nervosum Candolle)+蒲桃〔Syzygium jambos (Linn.) Alston〕群落的物种和功能多样性及群落稳定性。结果显示：鼎湖山河岸林水翁蒲桃+蒲桃群落共有植物55科98属134种。水翁蒲桃+蒲桃群落可划分为8个群丛，群落的稳定性总体较差，以乔木-灌木-草本结构的群丛稳定性较高，以乔木-草本结构的群丛稳定性较低，其中，在乔木-草本结构中，草本层伴生种越多的群丛，稳定性明显偏高。相关性分析结果显示：水翁蒲桃+蒲桃群落的物种多样性指数〔Margalef丰富度指数（R）、Simpson多样性指数（D）、Shannon-Wiener多样性指数（H）和Pielou均匀度指数（Jsw）〕与群落稳定性间无显著相关性，群落稳定性与功能丰富度指数(FRic)和Rao二次熵指数(RaoQ)间呈显著正相关，R值和D值与FRic值间呈显著正相关，表明水翁蒲桃+蒲桃群落的物种多样性可促进功能多样化，而群落稳定性受功能多样性的影响更大。综上所述，从水翁蒲桃+蒲桃群落的结构和功能特性考虑，在物种多样性的保护和管理以及提高群落稳定性方面应考虑群落结构的合理搭配及物种功能性状的多样性。

Thirty plots were set in the riparian forest of Dinghu Mountain National Nature Reserve in Guangdong Province, and species and functional diversity and community stability of Syzygium nervosum Candolle+Syzygium jambos (Linn.) Alston community were studied. The results show that there are 134 species belonging to 98 genera of 55 families in S. nervosum+S. jambos community in riparian forest of Dinghu Mountain. The S. nervosum+S. jambos community can be divided into 8 associations, the community stability is relatively poor in general, the association stability of arbor-shrub-herb structure is relatively high, that of arbor-herb structure is relatively low, in which, the associations with more accompanying species in herb layer show evident high stability in arbor-herb structure. The correlation analysis result shows that the species diversity indexes 〔Margalef richness index (R), Simpson diversity index (D), Shannon-Wiener diversity index (H), and Pielou evenness index (Jsw)〕 of S. nervosum+S. jambos community have no significant correlations with its community stability, the community stability shows significant positive correlations with functional richness index (FRic) and Rao’s quadratic entropy index (RaoQ), and R value and D value show significant positive correlations with FRic value, indicating that the species diversity of S. nervosum+S. jambos community can promote functional diversification, while the community stability is more affected by functional diversity. In conclusion, considering the structure and functional characteristics  of S. nervosum+S. jambos community, reasonable collocation of community structure and diversification of species functional traits should be considered in the conservation and management of species diversity and the improvement of community stability.