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外文期刊>Applied Ecology and Environmental Research
>A COMPARISON OF SEVERAL COMMON MATHEMATICAL INDICES FOR MEASURING FUNCTIONAL DIVERSITY IN FOREST COMMUNITIES IN THE WULINGSHAN NATURE RESERVE, NORTH CHINA
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A COMPARISON OF SEVERAL COMMON MATHEMATICAL INDICES FOR MEASURING FUNCTIONAL DIVERSITY IN FOREST COMMUNITIES IN THE WULINGSHAN NATURE RESERVE, NORTH CHINA
Functional diversity and its change mechanisms are important for forest conservation. Change patterns of functional diversity in forest communities along altitudinal and disturbance gradients in the Wulingshan Nature Reserve were analyzed using several common indices. Forty-one 20 m ? 20 m plots of forest communities were established along the altitudinal gradient. Plant species, functional traits and environmental variables were measured and recorded. Six functional diversity indices, Functional Attribute Diversity (FAD), Modified Functional Attribute Diversity (MFAD), Functional diversity based on dendrogram (FDp and FDc), Functional evenness (FEve) and Functional divergence (FDiv), were employed to quantify functional diversity. The results showed a great change in functional diversity of the forest communities in the Wulingshan Reserve. Functional diversity was significantly correlated with altitude and disturbance gradients. A non-linear “humped” change pattern along the altitudinal gradient and a non-linear or near linear decrease pattern along the disturbance intensity gradient were identified. Elevation and disturbance were the key factors influencing functional diversity. Functional diversity was closely related to species diversity in forests. The six common indices used were all effective and complementary to each other in functional diversity analysis in forests. MFAD, FEve and FDiv should be preferred in practice.
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