Functional patterns of microbial communities of rhizospheric soils across the development stages of a young mangrove in French Guiana - IRD - Institut de recherche pour le développement Access content directly
Journal Articles Microbial ecology Year : 2014

Functional patterns of microbial communities of rhizospheric soils across the development stages of a young mangrove in French Guiana

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.
Fichier principal
Vignette du fichier
Luglia et al. 2014.pdf (1.95 Mo) Télécharger le fichier
Origin Files produced by the author(s)

Dates and versions

ird-00971793 , version 1 (03-04-2014)
ird-00971793 , version 2 (04-05-2018)

Identifiers

Cite

Mathieu Luglia, S. Criquet, Max Sarrazin, Fabio Ziarelli, Daniel Guiral. Functional patterns of microbial communities of rhizospheric soils across the development stages of a young mangrove in French Guiana. Microbial ecology, 2014, 67 (2), pp.302-317. ⟨10.1007/s00248-013-0298-9⟩. ⟨ird-00971793v2⟩
499 View
665 Download

Altmetric

Share

Gmail Mastodon Facebook X LinkedIn More