FDis (2010)

Functional dispersion (FDis)

FDis measures the weighted mean distance of individual species to their weighted centroid, where weights are their relative abundances

Author

Laliberte E. and Legendre P.

Published in

Ecology, 91(1), 2010, pp 299-305

Range

From 0 to 1 (with standardized trait prior to compute)

Weaknesses

Do not satisfy monotonicity criterions ((i.e., a subset of a community should be no more diverse than the whole community)

Strengths

Little influenced by species richness, can be compute for any distance or dissimilarity measure, can handle any number of types of traits (quantitative and semi-quantitative) and missing trait values, is not strongly influenced by outliers, takes into account species relative abundances

Main characteristics

Multivariate analogue of weighted mean absolute deviation

R Package

http://cran.r-project.org/web/packages/FD/

R Package description

http://cran.r-project.org/web/packages/FD/FD.pdf

Studies that used this index

 

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