@article{fdi:010060427,
  title = {{I}nfluence of mangrove zonation on {CO}2 fluxes at the sediment-air interface ({N}ew {C}aledonia)},
  author = {{L}eopold, {A}. and {M}archand, {C}yril and {D}eborde, {J}. and {C}haduteau, {C}. and {A}llenbach, {M}.},
  editor = {},
  language = {{ENG}},
  abstract = {{M}angroves are the major ecosystems of tropical and subtropical coastlines. {T}hey are considered as a sink for atmospheric {CO}2 because they are characterized both by high net primary production, and by low rates of organic matter decomposition. {H}owever, a recent reassessment of the global mangrove budget suggests that organic carbon sinks have been underestimated, notably {CO}2 efflux from sediments and creek waters, and tidal export of dissolved inorganic carbon. {O}ur objective was to understand the influence of mangrove zonation on the magnitude of {CO}2 fluxes at the sediment-air interface. {T}ransparent and opaque dynamic closed chamber systems, coupled with an infra-red gas analyzer were used to measure {CO}2 fluxes. {I}n addition, the physico-chemical properties (salinity, redox potential) of pore waters were determined, as well as the carbon content and the origin of surface sediments ({C}hlorophyll-a and delta {C}-13). {D}epending on the type of measurement (in the dark with or without biofilm, in the light with biofilm) and mangrove stand (saltflat, {A}vicennia sp., or {R}hizophora spp.), mean surface sediment {CO}2 fluxes ranged between 40 +/- 56 and 199 +/- 95 mmol.m(-2).d(-1). {W}e suggest that these differences mainly result both from the organic content and the redox conditions of the sediments, which are influenced by the physiological activities of the root system, and by the position and the elevation of the stand in the intertidal zone. {I}n addition, the quality and abundance of biofilm, which also vary with the mangrove stand, also appear to strongly affect sediment {CO}2 fluxes as a result of chemical (metabolism) and also physical (barrier) processes.},
  keywords = {{M}angrove ; {C}arbon cycling ; {S}ediment {CO}2 fluxes ; {B}iofilm ; {NOUVELLE} {CALEDONIE}},
  booktitle = {},
  journal = {{G}eoderma},
  volume = {202},
  numero = {},
  pages = {62--70},
  ISSN = {0016-7061},
  year = {2013},
  DOI = {10.1016/j.geoderma.2013.03.008},
  URL = {https://www.documentation.ird.fr/hor/fdi:010060427},
}