功能多样性是生物多样性的重要组成部分, 是连接生物多样性和生态系统功能的桥梁。以山西太岳山脱皮榆(Ulmuslamellosa)群落为研究对象, 选取生境类型、种子扩散方式、传粉方式、固氮类型、生活史、生活型、叶型、植物高度、盖度、开花期和花期时长11个功能性状, 采用FAD指数、Rao’s指数、SL指数以及CL指数比较了7个群丛的功能多样性差异, 并分析了脱皮榆群落的功能多样性海拔梯度格局。结果表明: (1) 从群丛I到群丛VII, FAD指数、SL指数以及CL指数减小, Rao’s指数增大, 均表明功能多样性呈下降趋势; (2) 脱皮榆群落的功能多样性海拔梯度格局明显, 海拔升高, 功能多样性降低。

As a component of biodiversity, plant functional diversity is considered a key factor in understanding the link between ecosystem functioning and biodiversity. In this study, we researched the functional diversity of the Ulmus lamellosa community in the Taiyue Mountain area of Shanxi. We investigated 11 traits, including habitat type, spread of seeds, pollination, type of nitrogen fixation, life history, life form, leaf type, plant height, coverage, flowering period and flowering time. The functional diversity of 7 U. lamellosa associations and the elevation pattern were analyzed by using FAD, Rao’s, SL and CL indices. Results showed that, the FAD, SL, CL indices decreased from association I to VII, and the Rao’s indices increased, and both implied the functional diversity decreased in this order. Regression models indicated that elevation was the primary determinant of the functional diversity, and functional diversity decreased with increasing elevation.