摘要:为了理解午潮山次生林群落结构和演替特征，分析了不同演替阶段功能群物种的生态位和种间关系。对研究区70个20×20 m森林样地内胸径≥1 cm的木本植物进行分析调查，并按照11个功能性状（叶片氮含量、叶片磷含量、叶片钾含量、比叶面积、木材密度、叶片干物质含量、叶片叶绿素含量、生长型、寿命、喜光性和最大潜在树高）将主要的45个物种划分为4个功能群：早期先锋树种（PFG1）、中期中性树种（PFG2）、中后期树种（PFG3）和后期耐阴树种（PFG4）。结果表明种间正负联结比接近1，但显著正联结多于显著负联结，群落整体稳定，而演替中后期功能群（PFG2、PGF3和PFG4）的种间生态位重叠和种间联结强度较高，种间竞争激烈。午潮山森林群落正向演替后期发展，可伐除部分与演替中后期树种相互竞争的早期树种加速演替，并且补植有价值的喜阳先锋种减少开放地，为修复森林生态系统和加速群落演替提供策略。



Abstract:To understand the community structure and succession characteristics of Wuchao Mountain secondary forest, we analyzed niche and interspecific relationships of functional groups presenting succession stages. We investigated woody plants with diameter at breast height ≥ 1 cm in 20 m×20 m forest samples in the study area. Eleven functional traits were measured including leaf nitrogen content, leaf phosphorus content, leaf kalium content, specific leaf area, woody density, leaf dry matter content, chlorophyll content, growth form, longevity, shade tolerance, and maximum potential height. The 45 species were grouped into four functional groups, such as early successional species (PFG1), mid successional species (PFG2), mid and late successional species (PFG3), and late successional species (PFG4). The results of the interspecific association showed that the ratio of positive and negative association was close to 1, and the significant positive pairs were greater than the significant negative pairs, which indicated that the community was in a relatively stable succession statue. However, the values of niches overlap and interspecific association among PFG2, PGF3, and PFG4 were high and interspecific competition was intense. Our results suggest that the forest community of Wuchao Mountain is developing towards the later stage of succession. To restore forest ecosystems and accelerate succession, thinning of the early species competing with late species could be undertaken and commercial pioneer species could be used to reduce the amount of opening area.





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