The ade4 Package: Implementing the Duality Diagram for Ecologists
The theory of the duality diagram is presented and its implementation in ade4 is discussed, which follows the tradition of the French school of "Analyse des Donnees" and is based on the use of theDuality diagram.
Spatial modelling: a comprehensive framework for principal coordinate analysis of neighbour matrices (PCNM)
- S. Dray, P. Legendre, P. Peres‐Neto
- 25 July 2006
Variation partitioning of species data matrices: estimation and comparison of fractions.
- P. Peres‐Neto, P. Legendre, S. Dray, D. Borcard
- 1 October 2006
It is shown that variation partitioning as currently applied in canonical analysis is biased, and appropriate unbiased estimators are presented to consider so that comparisons between fractions or, eventually, between different canonical models are meaningful.
Testing the species traits-environment relationships: the fourth-corner problem revisited.
- S. Dray, P. Legendre
- 1 December 2008
An extension to measure the link between species traits and environmental variables when the ecological community is described by abundance data is presented and a new multivariate fourth-corner statistic is proposed.
The global spectrum of plant form and function
- Sandra Díaz, J. Kattge, L. Gorné
- 14 January 2016
Analysis of worldwide variation in six major traits critical to growth, survival and reproduction within the largest sample of vascular plant species ever compiled found that occupancy of six-dimensional trait space is strongly concentrated, indicating coordination and trade-offs.
How to measure and test phylogenetic signal
- T. Münkemüller, S. Lavergne, W. Thuiller
- 1 August 2012
Phylogenetic signal is the tendency of related species to resemble each other more than species drawn at random from the same tree and various indices have been proposed for quantifying it.
Combining the fourth-corner and the RLQ methods for assessing trait responses to environmental variation.
- S. Dray, P. Choler, C. ter Braak
How the complementarity between the fourth-corner and RLQ methods can be exploited to promote new ecological knowledge and to improve the study of trait-environment relationships is illustrated.
CO‐INERTIA ANALYSIS AND THE LINKING OF ECOLOGICAL DATA TABLES
- S. Dray, D. Chessel, J. Thioulouse
- 1 November 2003
The co-inertia criterion for measuring the adequacy between two data sets is presented and can be easily extended to the cases of distance matrices or to the case of more than two tables.
Community ecology in the age of multivariate multiscale spatial analysis
- S. Dray, R. Pélissier, H. Wagner
- 1 August 2012
Species spatial distributions are the result of population demography, behavioral traits, and species interactions in spatially heterogeneous environmental conditions. Hence the composition of…