An evolutionary perspective on leaf economics: Phylogenetics of leaf mass per area in vascular plants

Olivier Flores*, Eric Garnier, Ian J. Wright, Peter B. Reich, Simon Pierce, Sandra Dìaz, Robin J. Pakeman, Graciela M. Rusch, Maud Bernard-Verdier, Baptiste Testi, Jan P. Bakker, Renée M. Bekker, Bruno E L Cerabolini, Roberta M. Ceriani, Guillaume Cornu, Pablo Cruz, Matthieu Delcamp, Jiri Dolezal, Ove Eriksson, Adeline FayolleHelena Freitas, Carly Golodets, Sylvie Gourlet-Fleury, John G. Hodgson, Guido Brusa, Michael Kleyer, Dieter Kunzmann, Sandra Lavorel, Vasilios P. Papanastasis, Natalia Pérez-Harguindeguy, Fernanda Vendramini, Evan Weiher

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    43 Citations (Scopus)


    In plant leaves, resource use follows a trade-off between rapid resource capture and conservative storage. This "worldwide leaf economics spectrum" consists of a suite of intercorrelated leaf traits, among which leaf mass per area, LMA, is one of the most fundamental as it indicates the cost of leaf construction and light-interception borne by plants. We conducted a broad-scale analysis of the evolutionary history of LMA across a large dataset of 5401 vascular plant species. The phylogenetic signal in LMA displayed low but significant conservatism, that is, leaf economics tended to be more similar among close relatives than expected by chance alone. Models of trait evolution indicated that LMA evolved under weak stabilizing selection. Moreover, results suggest that different optimal phenotypes evolved among large clades within which extremes tended to be selected against. Conservatism in LMA was strongly related to growth form, as were selection intensity and phenotypic evolutionary rates: woody plants showed higher conservatism in relation to stronger stabilizing selection and lower evolutionary rates compared to herbaceous taxa. The evolutionary history of LMA thus paints different evolutionary trajectories of vascular plant species across clades, revealing the coordination of leaf trait evolution with growth forms in response to varying selection regimes. Phylogenetic patterns in a key trait of plants resource-use strategies, leaf mass per area, are analyzed across a large dataset of vascular plants. Growth forms appear as a major correlate of the tempo of trait evolution. Different phenotypic optima are evidenced major across clades suggesting phylogenetic constraints in the phenotypic evolution of leaves.

    Original languageEnglish
    Pages (from-to)2799-2811
    Number of pages13
    JournalEcology and Evolution
    Issue number14
    Publication statusPublished - Jul 2014


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