Supporting Information
The interspecific and intraspecific variation of functional traits in weeds:
diversified ecological strategies within arable fields.
Rémi Perronnea, Sabrina Gabaa, Emilie Cadeta, Valérie Le Correa
a
INRA, UMR1347 Agroécologie, BP 86510, F-21000 Dijon, France
Supplementary Figures
Supplementary Figure 1. Schematic representation of the randomization-model used for the
multi-trait measure: (A) First, matrices of individuals x traits in a set of individuals sampled in
both field elements (e.g. the crop edge and the field margin) were randomized after
standardization (Petchey and Gaston 2006). All the traits of an individual plant were kept
together during the randomization (Stubbs and Wilson 2004). (B) Second, for each of the
10000 null matrices generated, the Fβ index was calculated (Villéger, Novack-Gottshall, and
Mouillot 2011). The functional dissimilarity index is bounded between zero (i.e. perfect
overlap) and one (i.e. absence of intersection). (C) Finally, based on a direct test of
significance, more appropriate for convex hull volume metrics (Veech 2012), the evaluation
of the non-random structure was made (one-tail test, α = 0.05) after applying sequential
Bonferroni-Holm adjustment (1979).
Supplementary References Figure 1
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Stubbs, W. J., and J. B. Wilson. 2004. Evidence for Limiting Similarity in a Sand Dune
Community. Journal of Ecology 92: 557–567.
Veech, J. A. 2012. Significance Testing in Ecological Null Models. Theoretical Ecology 5:
611–616.
Villéger, S., P. M. Novack-Gottshall, and D. Mouillot. 2011. The Multidimensionality of the
Niche Reveals Functional Diversity Changes in Benthic Marine Biotas across Geological
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