@article{fdi:010063124,
  title = {{T}emporal variability of {CO}2 fluxes at the sediment-air interface in mangroves ({N}ew {C}aledonia)},
  author = {{L}eopold, {A}. and {M}archand, {C}yril and {D}eborde, {J}. and {A}llenbach, {M}.},
  editor = {},
  language = {{ENG}},
  abstract = {{C}arbon budgets in mangrove forests are uncertain mainly due to the lack of data concerning carbon export in dissolved and gaseous forms. {T}emporal variability of in situ {CO}2 fluxes was investigated at the sediment-air interface in different seasons in different mangrove stands in a semi-arid climate. {F}luxes were measured using dynamic closed incubation chambers (transparent and opaque) connected to an infra-red gas analyzer. {M}icrodimatic conditions and chl-a contents of surface sediments were determined. {O}ver all mangrove stands, {CO}2 fluxes on intact sediments were relatively low, ranging from -3.93 to 835 mmol{CO}(2).m(-2).h(-1) in the light and in the dark, respectively. {C}hanges in the fluxes over time appeared to depend to a great extent on the development of the biofilm at the sediment surface. {W}e suggest that in intact sediments and in the dark, {CO}2 fluxes measured at the sediment-air interface rather reflect the metabolism of benthic organisms than sediment respiration (heterotrophic and autotrophic). {H}owever, without the biofilm, sediment water content and air temperature were main drivers of seasonal differences in {CO}2 fluxes, and their influence differed depending on the intertidal location of the stand. {A}fter removal of the biofilm, {Q}(10) values in the {A}vicennia and the {R}hizophora stands were 1.84 and 2.1, respectively, revealing the sensitivity of mangrove sediments to an increase in temperature. {T}his study provides evidence that, if the influence of the biofilm is not taken into account, the in situ {CO}2 emission data currently used to calculate the budget will lead to underestimation of {CO} (2) production linked to heterotrophic respiration fueled by organic matter detritus from the mangrove.},
  keywords = {{I}n situ sediment {CO}2 fluxes ; {S}easonal variation ; {B}iofilm ; {M}angrove ; {N}ew {C}aledonia ; {NOUVELLE} {CALEDONIE}},
  booktitle = {},
  journal = {{S}cience of the {T}otal {E}nvironment},
  volume = {502},
  numero = {},
  pages = {617--626},
  ISSN = {0048-9697},
  year = {2015},
  DOI = {10.1016/j.scitotenv.2014.09.066},
  URL = {https://www.documentation.ird.fr/hor/fdi:010063124},
}