Contrasting patterns of leaf trait variation among and within species during tropical dry forest succession in Costa Rica

Derroire Géraldine, Powers Jennifer S., Hulshof Catherine M., Cárdenas Varela Luis E., Healey John R.. 2018. Contrasting patterns of leaf trait variation among and within species during tropical dry forest succession in Costa Rica. Scientific Reports, 8:285, 11 p.

Quartile : Q1, Sujet : MULTIDISCIPLINARY SCIENCES

Résumé : A coordinated response to environmental drivers amongst individual functional traits is central to the plant strategy concept. However, whether the trait co-ordination observed at the global scale occurs at other ecological scales (especially within species) remains an open question. Here, for sapling communities of two tropical dry forest types in Costa Rica, we show large differences amongst traits in the relative contribution of species turnover and intraspecific variation to their directional changes in response to environmental changes along a successional gradient. We studied the response of functional traits associated with the leaf economics spectrum and drought tolerance using intensive sampling to analyse inter- and intra-specific responses to environmental changes and ontogeny. Although the overall functional composition of the sapling communities changed during succession more through species turnover than through intraspecific trait variation, their relative contributions differed greatly amongst traits. For instance, community mean specific leaf area changed mostly due to intraspecific variation. Traits of the leaf economics spectrum showed decoupled responses to environmental drivers and ontogeny. These findings emphasise how divergent ecological mechanisms combine to cause great differences in changes of individual functional traits over environmental gradients and ecological scales.

Mots-clés géographiques Agrovoc : Costa Rica

Classification Agris : K01 - Foresterie - Considérations générales
F62 - Physiologie végétale - Croissance et développement
F40 - Écologie végétale

Champ stratégique Cirad : Axe 6 (2014-2018) - Sociétés, natures et territoires

Auteurs et affiliations

• Derroire Géraldine, CIRAD-ES-UMR Ecofog (GUF) ORCID: 0000-0001-7239-2881 - auteur correspondant
• Powers Jennifer S., University of Minnesota (USA)
• Hulshof Catherine M., Universidad de Puerto Rico (PRI)
• Cárdenas Varela Luis E., UCR (CRI)
• Healey John R., Bangor University (GBR)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/587078/)

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