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<datestamp>2018-01-11</datestamp>
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<title lang=en>Seasonal variation in atmospheric relative humidity contributes to explaining seasonal variation in trunk circumference of tropical rain-forest trees in French Guiana</title>
<creator>Stahl, Clement</creator>
<creator>Burban, Benoît</creator>
<creator>Bompy, Félix</creator>
<creator>Jolin, Zachari</creator>
<creator>Sermage, Juliette</creator>
<creator>Bonal, Damien</creator>
<contributor>Ecologie des forêts de Guyane (ECOFOG) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (CIRAD) - Institut National de la Recherche Agronomique (INRA) - Université des Antilles et de la Guyane (UAG) - AgroParisTech - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Ecologie et Ecophysiologie Forestières (EEF) ; Institut National de la Recherche Agronomique (INRA) - Université de Lorraine (UL)</contributor>
<description> </description>
<source>ISSN: 0266-4674</source>
<source>EISSN: 1469-7831</source>
<source>Journal of Tropical Ecology</source>
<publisher>Cambridge University Press (CUP)</publisher>
<identifier>hal-01032186</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-01032186</identifier>
<source>https://hal.archives-ouvertes.fr/hal-01032186</source>
<source>Journal of Tropical Ecology, Cambridge University Press (CUP), 2010, 26 (4), pp.393-405. 〈10.1017/S0266467410000155〉</source>
<identifier>DOI : 10.1017/S0266467410000155</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1017/S0266467410000155</relation>
<language>en</language>
<subject lang=en>BARK</subject>
<subject lang=en>DROUGHT</subject>
<subject lang=en>SECONDARY GROWTH</subject>
<subject lang=en>SEASONALITY</subject>
<subject lang=en>TROPICAL RAIN FOREST</subject>
<subject lang=en>WATER </subject>
<subject lang=en>SEASONAL VARIATION</subject>
<subject lang=en>ATMOSPHERIC RELATIVE HUMIDITY</subject>
<subject lang=en>BARK WATER CONTENT</subject>
<subject lang=en>BARCK THICKNESS</subject>
<subject lang=en>TRUNK CIRCUMFERENCE</subject>
<subject lang=en>DENDROMETERS</subject>
<subject lang=en>LABORATORY EXPERIMENT</subject>
<subject lang=en>BARK THICKNESS</subject>
<subject>[SDV.SA] Life Sciences [q-bio]/Agricultural sciences</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>Large seasonal variation in the rate of change in girth of tropical rain-forest tree species has been described, but its origin is still under debate. We tested whether this variation might be related to variation in atmospheric relative humidity through its influence on bark water content and thickness. Variation in trunk circumference of 182 adult trees was measured about twice a month in an undisturbed tropical rain forest over 18mo using dendrometers. Furthermore, a laboratory experiment was conducted to test the direct influence of relative air humidity on bark water content and thickness. In the field, most trees displayed highly positive rates of change in girth at the onset of the wet season, while a quarter of the trees displayed negative changes during long dry seasons, whatever their total annual growth. This variation was correlated with environmental conditions, particularly with atmospheric relative humidity. Trees with high bark water content and thickness displayed a stronger decrease in girth during the dry season. In the chamber experiment, desiccation induced a decrease in the diameter of the trunk sections in tandem with a decrease in bark water content. As a result, seasonal variation in the rate of change in girth of tropical rain-forest trees reflects variation in trunk biophysical properties, through the influence of relative humidity on bark properties, but not directly variation in secondary growth.</description>
<date>2010</date>
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