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<title lang=en>Colonization front of the understorey palm Astrocaryum sciophilum in a pristine rain forest of French Guiana</title>
<creator>Charles-Dominique, Pierre</creator>
<creator>Chave, Jérôme</creator>
<creator>Dubois, Marc</creator>
<creator>De Granville, Jean-Jacques</creator>
<creator>Riera, Bernard</creator>
<creator>Vezzoli, Cécile</creator>
<contributor>Laboratoire d'Ecologie Générale ; Muséum National d'Histoire Naturelle (MNHN)</contributor>
<contributor>UMR 8571 ; Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Laboratoire d'Ecologie Terrestre, UMR 5552 ; Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Department of Ecology and Evolutionary Biology ; Princeton University </contributor>
<contributor>Service de physique de l'état condensé (SPEC - UMR3680) ; Commissariat à l'énergie atomique et aux énergies alternatives (CEA) - Université Paris-Saclay - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Ecologie des forêts de Guyane (ECOFOG) ; Ecole Nationale du Génie Rural, des Eaux et des Forêts (ENGREF) - Institut National de la Recherche Agronomique (INRA) - Université des Antilles et de la Guyane (UAG) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<description> </description>
<source>ISSN: 1466-822X</source>
<source>EISSN: 1466-822X</source>
<source>Global Ecology and Biogeography</source>
<publisher>Wiley</publisher>
<identifier>hal-01032154</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-01032154</identifier>
<source>https://hal.archives-ouvertes.fr/hal-01032154</source>
<source>Global Ecology and Biogeography, Wiley, 2003, 12 (3), pp.237-248. 〈10.1046/j.1466-822X.2003.00020.x〉</source>
<identifier>DOI : 10.1046/j.1466-822X.2003.00020.x</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1046/j.1466-822X.2003.00020.x</relation>
<language>en</language>
<subject lang=en>ASTROCARYUM SCIOPHILUM</subject>
<subject lang=en>NEOTROPICAL PALAEOECOLOGY</subject>
<subject lang=en>PALM ECOLOGY</subject>
<subject lang=en>POPULATION EDGE</subject>
<subject lang=en>REFUGES</subject>
<subject lang=en>SCATTER-HOARDING</subject>
<subject lang=en>SEED DISPERSAL</subject>
<subject lang=en>SPATIAL PATTERN</subject>
<subject lang=en>ECOLOGIE</subject>
<subject lang=en>DEMOGRAPHIE</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>Aims: Astrocaryum sciophilum (Miq.) Pulle (Arecaceae) is an understorey palm, endemic to north-eastern South America with a patchy distribution. We tested the hypothesis that the spatial distribution of this palm species is not in equilibrium but is slowly colonizing the forest understorey. Location: Inventories and seed dispersal studies were conducted in the undisturbed tropical forest close to the Nouragues research station, French Guiana. Additional data were collected in the entire territory of French Guiana. Methods: We studied the demography of A. sciophilum on a 20-ha plot located at the edge of its distribution. The age of the palms was estimated by postulating an exponentially decreasing abundance by age class. Direct seed dispersal experiments were also conducted, to estimate dispersal parameters. The seeds of A. sciophilum were dispersed only by rodents. This information was used to parameterize a forest growth simulator, to study the spatial spread of this species. Results: Within the sampling plot, the density of A. sciophilum dropped sharply from about 500 individuals per hectare to zero. The maturation age was estimated to be 170 ± 70 years, and over 55 years with 95% confidence. Seed-dispersal experiments yielded an average seed dispersal distance of 11 m and a maximum estimated dispersal distance of 125 m across a generational span of 55 years to maturity. Therefore, the maximal estimated colonization speed is 2.3 m/y. Conclusions: Empirical results and numerical simulations suggest that the boundary of the A. sciophilum population is a colonization front, and that the range of this species is slowly expanding. The implications of this result in respect of palaeoenvironmental changes in this region are discussed.</description>
<date>2003</date>
</dc>
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