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<datestamp>2018-01-11</datestamp>
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<publisher>HAL CCSD</publisher>
<title lang=it>Does variability in litter quality determine soil microbial respiration in an amazonian rainforest ?</title>
<creator>Fanin, Nicolas</creator>
<creator>Hättenschwiler, Stephan</creator>
<creator>Barantal, Sandra</creator>
<creator>Schimann, Heidy</creator>
<creator>Fromin, Nathalie</creator>
<contributor>Centre d’Ecologie Fonctionnelle et Evolutive (CEFE) ; Institut de Recherche pour le Développement (IRD [France-Sud]) - Centre National de la Recherche Scientifique (CNRS) - Université de Montpellier (UM) - Institut national de la recherche agronomique [Montpellier] (INRA Montpellier) - École pratique des hautes études (EPHE) - Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro) - Université Paul-Valéry - Montpellier 3 (UM3) - Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro)</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>
<description> </description>
<source>ISSN: 0038-0717</source>
<source>Soil Biology and Biochemistry</source>
<publisher>Elsevier</publisher>
<identifier>hal-01032139</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-01032139</identifier>
<source>https://hal.archives-ouvertes.fr/hal-01032139</source>
<source>Soil Biology and Biochemistry, Elsevier, 2011, 43 (5), pp.1014-1022. 〈10.1016/j.soilbio.2011.01.018〉</source>
<identifier>DOI : 10.1016/j.soilbio.2011.01.018</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1016/j.soilbio.2011.01.018</relation>
<language>en</language>
<subject lang=en>CARBON FORMS</subject>
<subject lang=en>LITTER QUALITY</subject>
<subject lang=en>MICROBIAL RESPIRATION PROCESS</subject>
<subject lang=en>NITROGEN</subject>
<subject lang=en>PHOSPHORUS</subject>
<subject lang=en>STOICHIOMETRY</subject>
<subject>[SDV.SA.SDS] Life Sciences [q-bio]/Agricultural sciences/Soil study</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>Tree species-rich tropical rainforests are characterized by a highly variable quality of leaf litter input to the soil at small spatial scales. This diverse plant litter is a major source of energy and nutrients for soil microorganisms, particularly in rainforests developed on old and nutrient-impoverished soils. Here we tested the hypothesis that the variability in leaf litter quality produced by a highly diverse tree community determines the spatial variability of the microbial respiration process in the underlying soil. We analyzed a total of 225 litter-soil pairs from an undisturbed Amazonian rainforest in French Guiana using a hierarchical sampling design. The microbial respiration process was assessed using substrateinduced respiration (SIR) and compared to a wide range of quality parameters of the associated litter layer (litter nutrients, carbon forms, stoichiometry, litter mass and pH). The results show that the variability of both litter quality and SIR rates was more important at large than at small scales. SIR rates varied between 1.1 and 4.0 mg g_1 h_1 and were significantly correlated with litter layer quality (up to 50% of the variability explained by the best mixed linear model). Total litter P content was the individual most important factor explaining the observed spatial variation in soil SIR, with higher rates associated to high litter P. SIR rates also correlated positively with total litter N content and with increasing proportions of labile C compounds. However, contrary to our expectation, SIR rates were not related to litter stoichiometry. These data suggest that in the studied Amazonian rainforest, tree canopy composition is an important driver of the microbial respiration process via leaf litter fall, resulting in potentially strong plant-soil feedbacks. .</description>
<date>2011</date>
</dc>
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