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

摘要: The functional patterns of microbial communities (microbial respiration, enzyme activities, diversity) and the relevant physico-chemical characteristics rhizospheric soils were studied during process mudflat colonization by mangrove. study site is a fringe mangrove stand located in Montabo Bay at Cayenne (French Guiana). It characterized different vegetation development stages dominated an assemblage Avicennia germinans Laguncularia racemosa. Rhizospheric surface collected from three stations based on successional colonization: pioneer (P), coppice (C), young forest (F). showed significant progressive shifts along profile. P stages, those most influenced tide currents, macroscopically hydro-sedimentary instability micro-phytobenthic mudflat. This stage, low total organic carbon (TOC) content quality, lowest extracellular enzymatic activities highest metabolic diversities. TOC quality analyses 13C CPMAS NMR provided evidence enrichment increasing imprint aboveground C as succession occurs. These differences origin, amount, soil matter (SOM) older exerted both quantitative qualitative control over responses. indicated enhancement aboveground–belowground linkages, leading to expression high decomposition loss specialization communities.