@article{fdi:010068407,
  title = {{C}arbon dioxide fluxes from a degraded woodland in {W}est {A}frica and their responses to main environmental factors},
  author = {{A}go, {E}.{E}. and {S}er{\c{c}}a, {D}. and {A}gbossou, {E}.{K}. and {G}alle, {S}ylvie and {A}ubinet, {M}.},
  editor = {},
  language = {{ENG}},
  abstract = {{B}ackground : {I}n {W}est {A}frica, natural ecosystems such as woodlands are the main source for energy, building poles and livestock fodder. {T}hey probably behave like net carbon sinks, but there are only few studies focusing on their carbon exchange with the atmosphere. {H}ere, we have analyzed {CO}2 fluxes measured for 17 months by an eddy-covariance system over a degraded woodland in northern {B}enin. {S}pecially, temporal evolution of the fluxes and their relationships with the main environmental factors were investigated between the seasons. {R}esults : {T}his study shows a clear response of {CO}2 absorption to photosynthetic photon flux density ({Q}p), but it varies according to the seasons. {A}fter a significant and long dry period, the ecosystem respiration ({R}) has increased immediately to the first significant rains. {N}o clear dependency of ecosystem respiration on temperature has been observed. {T}he degraded woodlands are probably the “carbon neutral” at the annual scale. {T}he net ecosystem exchange ({NEE}) was negative during wet season and positive during dry season, and its annual accumulation was equal to +29 ± 16 g {C} m−2. {T}he ecosystem appears to be more efficient in the morning and during the wet season than in the afternoon and during the dry season. {C}onclusions : {T}his study shows diurnal and seasonal contrasted variations in the {CO}2 fluxes in relation to the alternation between dry and wet seasons. {T}he {N}angatchori site is close to the equilibrium state according to its carbon exchanges with the atmosphere. {T}he length of the observation period was too short to justify the hypothesis about the “carbon neutrality” of the degraded woodlands at the annual scale in {W}est {A}frica. {B}esides, the annual net ecosystem exchange depends on the intensity of disturbances due to the site management system. {F}urther research works are needed to define a woodland management policy that might keep these ecosystems as carbon sinks.},
  keywords = {{BIOCLIMATOLOGIE} ; {CARBONE} ; {FLUX} ; {FORET} {CLAIRE} ; {VARIATION} {SAISONNIERE} ; {FACTEUR} {CLIMATIQUE} ; {TEMPERATURE} ; {HUMIDITE} {DE} {L}'{AIR} ; {PRECIPITATION} ; {BILAN} {CARBONE} ; {FORET} {DEGRADEE} ; {VARIATION} {HORAIRE} ; {BENIN}},
  booktitle = {},
  journal = {{C}arbon {B}alance and {M}anagement},
  volume = {10},
  numero = {},
  pages = {art. 22 [16 ]},
  ISSN = {1750-0680},
  year = {2015},
  DOI = {10.1186/s13021-015-0033-6},
  URL = {https://www.documentation.ird.fr/hor/fdi:010068407},
}