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<identifier>oai:HAL:hal-00964668v1</identifier>
<datestamp>2017-12-21</datestamp>
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<publisher>HAL CCSD</publisher>
<title lang=en>Linking morphological traits and functional strategies: a typological approach of tropical forests species</title>
<creator>Mira, Eléonore, </creator>
<creator>Blazy, Jean-Marc, </creator>
<creator>Cochard, Hervé, </creator>
<creator>Schemla, Virgile, </creator>
<creator>Dulormne, Maguy, </creator>
<contributor>Dynamique des écosystèmes Caraïbe et biologie des espèces associées (DYNECAR EA 926) ; Université des Antilles et de la Guyane (UAG)</contributor>
<contributor>Agrosystèmes tropicaux (ASTRO) ; Institut National de la Recherche Agronomique (INRA)</contributor>
<contributor>Laboratoire de Physique et Physiologie Intégratives de l'Arbre Fruitier et Forestier (PIAF) ; Institut National de la Recherche Agronomique (INRA) - Université Blaise Pascal - Clermont-Ferrand 2 (UBP)</contributor>
<source>Book of Abstracts - isem 2013 - Ecological Modelling for Ecosystem Sustainability</source>
<source>19. Biennial ISEM Conference - Ecological Modelling for Ecosystem Sustainability in the context of Global Change</source>
<coverage>Toulouse, France</coverage>
<identifier>hal-00964668</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-00964668</identifier>
<source>https://hal.archives-ouvertes.fr/hal-00964668</source>
<source>19. Biennial ISEM Conference - Ecological Modelling for Ecosystem Sustainability in the context of Global Change, Oct 2013, Toulouse, France. pp.223, 2013</source>
<language>en</language>
<subject>[SDE.BE] Environmental Sciences/Biodiversity and Ecology</subject>
<subject>[SDV.BV] Life Sciences [q-bio]/Vegetal Biology</subject>
<type>info:eu-repo/semantics/conferenceObject</type>
<type>Conference papers</type>
<description lang=en>One of the major challenges in forest ecology is to understand the ecology, physiology and potential responses of the> 250000 species of vascular plants of the planet through the categorization of this diversity into functional groups. This approach is essentially based on functional traits analysis, but few investigations were made in tropical areas. The aim of this study was to determine functional groups in two contrasted tropical ecosystems, dry (DF) and mountain rain (MRF) forest (respectively rainfall of 1 200 mm/year and 10 000 mm/year). Guadeloupe Island in FWI presents both these ecosystems spread over less 100 km. In a first time, we developed an original species typology based on 7 "soft" traits, easy to measure (stomatal density, leaf trichom density, chlorophyll content, leaf nitrogen content, specific leaf area, wood density, leaf area, plant height). The method was based on principal component analysis (PCA) and agglomerative hierarchical clustering (AHC) applied to these traits measured at the individual level (Blazy et al., 2009). In a second time, we evaluated the relevance of these soft trait-based groups compared to a typology based on 5 "hard" ecophysiological traits, more costly to quantify but with higher functional significance (difference between predawn and minimum leaf water potential, stomatal conductance, maximal carbon assimilation rate, leaf water potential at 90% of loss of stem hydraulic conductivity). When performed on the dominant canopy species in DF and MRF (a total of 13 species and 60 mature individuals), the typological approach based on soft traits seems relevant to discriminate groups with a distinct functional reality. Through both ecosystems, we obtained 4 homogenous groups. Two were exclusively composed by DF's or MRF's species, indicating that a functional strategy can be linked to specific environmental conditions. The two other groups showed a mix of DF and MRF species indicating that different functional strategies can coexist in the same environment. These mixed groups seem distinct by their ecophysiological features, particularly in term of hydraulic characteristics. One group was composed by drought tolerant species, water spender species, with a high xylem embolism resistance, whereas the second one was composed by water saver species, less resistant to embolism. Therefore, a determination of functional groups based on soft traits could be useful to model ecosystem's responses to environmental changes on a global scale.</description>
<date>2013-10-28</date>
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