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On dendrogram-based measures of functional diversity
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DOI：10.1111/j.2006.0030-1299.15048.x.png)
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Euclidean distance is commonly involved in calculating functional diversity (FD), for example, in measures based on dendrogram branch lengths. We point out that this function is inappropriate in many cases and that the choice of clustering method is more crucial than earlier thought. Gower's formula and UPGMA clustering are suggested here as a standard combination of techniques for calculating FD. The advantage of Gower's measure is its suitability to a mixture of scale types and its tolerance to missing values. Examples demonstrate that UPGMA clustering is more robust and has a better goodness of fit to dissimilarities than complete and single linkage classifications. In addition, we propose that the effect of individual species on FD is best evaluated by species removals and subsequent comparisons of tree length values. The influence of each functional trait is optimally judged by considering both dendrogram length and topological changes.
Keyword:
GENERAL COEFFICIENT
GUILD STRUCTURE
SIMILARITY
COMMUNITY
RICHNESS
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IF:
3
论文数:
6.4K
被引数:
2.2W
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