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Publication Type J
Authors Luglia, M., S. Criquet, M. Sarrazin, F. Ziarelli and D. Guiral
Title Functional Patterns of Microbial Communities of Rhizospheric Soils Across the Development Stages of a Young Mangrove in French Guiana
Source Microbial Ecology
Abstract The 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.
ISSN 0095-3628
ISBN 0095-3628
Publication Date Feb
Year Published 2014
Volume 67
Issue 2
Beginning Page 302-317
Digital Object Identifier (DOI) 10.1007/s00248-013-0298-9
Unique Article Identifier WOS:000331707500008
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