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<title lang=en>Are algae relevant to the detritus-based food web in tank-bromeliads?</title>
<creator>Brouard, Olivier</creator>
<creator>Le Jeune, Anne-Hélène</creator>
<creator>Leroy, Céline</creator>
<creator>Cereghino, Régis</creator>
<creator>Roux, Olivier</creator>
<creator>Pelozuelo, Laurent</creator>
<creator>Dejean, Alain</creator>
<creator>Corbara, Bruno</creator>
<creator>Carrias, Jean-François</creator>
<contributor>Laboratoire Microorganismes : Génome et Environnement (LMGE) ; Université Blaise Pascal - Clermont-Ferrand 2 (UBP) - Université d'Auvergne - Clermont-Ferrand I (UdA) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<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>Laboratoire Ecologie Fonctionnelle et Environnement - ECOLAB (ECOLAB) ; Institut National Polytechnique [Toulouse] (INP) - Université Paul Sabatier - Toulouse 3 (UPS) - Observatoire Midi-Pyrénées (OMP) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Université Paul Sabatier - Toulouse 3 (UPS)</contributor>
<description>International audience</description>
<source>ISSN: 1932-6203</source>
<source>PLoS ONE</source>
<publisher>Public Library of Science</publisher>
<identifier>hal-00819161</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-00819161</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-00819161/document</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-00819161/file/Brouard2011_AreAlgae.pdf</identifier>
<source>https://hal.archives-ouvertes.fr/hal-00819161</source>
<source>PLoS ONE, Public Library of Science, 2011, 6 (5), pp.e20129. 〈10.1371/journal.pone.0020129〉</source>
<identifier>DOI : 10.1371/journal.pone.0020129</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1371/journal.pone.0020129</relation>
<identifier>PUBMED : 21625603</identifier>
<relation>info:eu-repo/semantics/altIdentifier/pmid/21625603</relation>
<language>en</language>
<subject>[SDE.BE] Environmental Sciences/Biodiversity and Ecology</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>We assessed the occurrence of algae in five species of tank-bromeliads found in contrasting environmental sites in a Neotropical, primary rainforest around the Nouragues Research Station, French Guiana. The distributions of both algal abundance and biomass were examined based on physical parameters, the morphological characteristics of bromeliad species and with regard to the structure of other aquatic microbial communities held in the tanks. Algae were retrieved in all of the bromeliad species with mean densities ranging from ∼10(2) to 10(4) cells/mL. Their biomass was positively correlated to light exposure and bacterial biomass. Algae represented a tiny component of the detrital food web in shaded bromeliads but accounted for up to 30 percent of the living microbial carbon in the tanks of Catopsis berteroniana, located in a highly exposed area. Thus, while nutrient supplies are believed to originate from wind-borne particles and trapped insects (i.e., allochtonous organic matter), our results indicate that primary producers (i.e., autochtonous organic matter) are present in this insectivorous bromeliad. Using a 24-h incubation of size-fractionated and manipulated samples from this plant, we evaluated the impact of mosquito foraging on algae, other microorganisms and rotifers. The prey assemblages were greatly altered by the predation of mosquito larvae. Grazing losses indicated that the dominant algal taxon, Bumilleriopsis sp., like protozoa and rotifers, is a significant part of the diet of mosquito larvae. We conclude that algae are a relevant functional community of the aquatic food web in C. berteroniana and might form the basis of a complementary non-detrital food web.</description>
<date>2011</date>
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