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Luglia Mathieu, Criquet S., Sarrazin Max, Ziarelli F., Guiral Daniel. (2014). Functional patterns of microbial communities of rhizospheric soils across the development stages of a young mangrove in French Guiana. Microbial Ecology, 67 (2), 302-317. ISSN 0095-3628

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Titre
Functional patterns of microbial communities of rhizospheric soils across the development stages of a young mangrove in French Guiana
Année de publication2014
Type de documentArticle référencé dans le Web of Science WOS:000331707500008
AuteursLuglia Mathieu, Criquet S., Sarrazin Max, Ziarelli F., Guiral Daniel.
SourceMicrobial Ecology, 2014, 67 (2), p. 302-317. ISSN 0095-3628
RésuméThe functional patterns of microbial communities (microbial respiration, enzyme activities, functional diversity) and the relevant physico-chemical characteristics of rhizospheric soils were studied during the process of mudflat colonization by mangrove. The study site is a fringe mangrove stand located in Montabo Bay at Cayenne (French Guiana). It is characterized by different vegetation development stages dominated by an assemblage of Avicennia germinans and Laguncularia racemosa. Rhizospheric and surface soils were collected from three stations based on successional stages of mangrove colonization: pioneer (P), coppice (C), and young forest (F). The microbial functional patterns showed significant progressive shifts along the mangrove vegetation profile. The P stages, those most influenced by tide currents, were macroscopically characterized by hydro-sedimentary instability and micro-phytobenthic colonization of mudflat. This stage, characterized by low total organic carbon (TOC) content and quality, showed the lowest extracellular enzymatic activities and the highest functional metabolic diversities. TOC quality analyses by C-13 CPMAS NMR provided evidence of progressive TOC enrichment and an increasing imprint of aboveground vegetation on C quality as succession occurs. These differences in the origin, amount, and quality of soil organic matter (SOM) of older stages exerted both a quantitative and qualitative control over microbial functional responses. This indicated the enhancement of aboveground-belowground functional linkages, leading to the expression of high decomposition activities and a functional loss and specialization of rhizospheric microbial communities.
Plan de classementEtudes, transformation, conservation du milieu naturel [082] ; Ecologie, systèmes aquatiques [036] ; Pédologie [068] ; Sciences fondamentales / Techniques d'analyse et de recherche [020]
Descr. géo.GUYANE FRANCAISE
LocalisationFonds IRD [F B010061816]
Identifiant IRDfdi:010061816
Lien permanenthttp://www.documentation.ird.fr/hor/fdi:010061816

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Centres de documentation

Bondy

Montpellier (centre IRD)

Montpellier (MSE)

Cayenne

Nouméa

Papeete

Abidjan

Dakar

Niamey

Ouagadougou

Tunis

La Paz

Quito