@article{fdi:010074138,
  title = {{B}iofilm and temperature controls on greenhouse gas ({CO}2 and {CH}4) emissions from a {R}hizophora mangrove soil ({N}ew {C}aledonia)},
  author = {{J}acotot, {A}. and {M}archand, {C}yril and {A}llenbach, {M}.},
  editor = {},
  language = {{ENG}},
  abstract = {{S}easonal variations of {CO}2 and {CH}4 fluxes were investigated in a {R}hizophora mangrove forest that develops under a semi-arid climate, in {N}ew {C}aledonia. {F}luxes were measured using closed incubation chambers connected to a {CRDS} analyzer. {T}hey were performed during low tide at light, in the dark, and in the dark after having removed the top 1-2 mm of soil, which may contain biofilm. {CO}2 and {CH}4 fluxes ranged from 31.34 to 187.48 mmol m(-2) day(-1) and from 39.36 to 428.09 mu mol m(-2) day(-1), respectively. {B}oth {CO}2 and {CH}4 emissions showed a strong seasonal variability with higher fluxes measured during the warm season, due to an enhanced production of these two gases within the soil. {F}urthermore, {CO}2 fluxes were higher in the dark than at light, evidencing photosynthetic processes at the soil surface and thus the role of biofilm in the regulation of greenhouse gasemissions from mangrove soils. {T}he mean delta(13) {C}-{CO}2 value of the {CO}2 fluxes measured was -19.76 +/- 1.19%, which was depleted compared to the one emitted by root respiration (-22.32 +/- 1.06%), leaf litter decomposition (-21.43 +/- 1.89%) and organic matter degradation (-22.33 +/- 1.82%). {T}his result confirmed the use of the {CO}2 produced within the soil by the biofilm developing at its surface. {A}fter removing the top 1-2 mm of soil, both {CO}2 and {CH}4 fluxes increased. {E}nhancement of {CH}4 fluxes suggests that biofilm may act as a physical barrier to the transfer of {GHG} from the soil to the atmosphere. {H}owever, the delta {C}-13-{CO}2 became more enriched, evidencing that the biofilm was not integrally removed, and that its partial removal resulted in physical disturbance that stimulated {CO}2 production. {T}herefore, this study provides useful information to understand the global implication of mangroves in climate change mitigation.},
  keywords = {{S}oil fluxes ; {G}reenhouse gas ; {C}arbon stable isotopes ; {B}iofilm ; {B}lue carbon ; {S}emi-arid mangrove ; {NOUVELLE} {CALEDONIE}},
  booktitle = {},
  journal = {{S}cience of the {T}otal {E}nvironment},
  volume = {650},
  numero = {1},
  pages = {1019--1028},
  ISSN = {0048-9697},
  year = {2019},
  DOI = {10.1016/j.scitotenv.2018.09.093},
  URL = {https://www.documentation.ird.fr/hor/fdi:010074138},
}