@article{fdi:010067336,
  title = {{T}emperature dependence of {CO}2 emissions rates and isotopic signature from a calcareous soil},
  author = {{C}hevallier, {T}iphaine and {C}ournac, {L}aurent and {H}amdi, {S}alwa and {G}allali, {T}. and {B}ernoux, {M}artial},
  editor = {},
  language = {{ENG}},
  abstract = {{I}n the context of climate change, studies have focused on the temperature dependence of soil {CO}2 emissions. {A}lthough calcareous soils cover over 30% of the earth's land surface, few studies have considered calcareous soils where soil inorganic carbon ({SIC}) makes the analysis of the {C} fluxes at the soil to air interface more complex. {T}his study tested how temperature could affect the contributions of soil organic carbon ({SOC}) and {SIC} to the {CO}2 emitted from a calcareous soil. {T}he soil p{H}, {CO}2 emissions and δ13{C} signatures of {CO}2 were measured after soil incubations at 4 temperatures (20 °{C}, 30 °{C}, 40 °{C} and 50 °{C}). {T}he {CO}2 emissions and the δ13{C} signature of the emitted {CO}2 increased with temperature. {T}he proportion of {SIC}-derived {CO}2 in these emissions seemed to be stimulated by temperature. {T}hree processes were discussed: (1) isotopic fractionations, (2) temperature impacts on {SIC}- and {SOC}-derived {CO}2, and (3) isotope exchanges between {SIC}- and {SOC}-derived {CO}2. {T}he use of δ13{C} signature analysis to determine the contribution of {SIC} and {SOC} to the total {CO}2 emissions from soil is not straightforward. {A}n increase in the {SIC} signature of emitted {CO}2 does not directly imply an increase in {SIC} as a source of {CO}2.},
  keywords = {{ZONE} {TROPICALE}},
  booktitle = {},
  journal = {{J}ournal of {A}rid {E}nvironments},
  volume = {135},
  numero = {},
  pages = {132--139},
  ISSN = {0140-1963},
  year = {2016},
  DOI = {10.1016/j.jaridenv.2016.08.002},
  URL = {https://www.documentation.ird.fr/hor/fdi:010067336},
}