@article{fdi:010061339,
  title = {{M}ultiresolution quantification of deciduousness in {W}est-{C}entral {A}frican forests},
  author = {{V}iennois, {G}. and {B}arbier, {N}icolas and {F}abre, {I}. and {C}outeron, {P}ierre},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he characterization of leaf phenology in tropical forests is of major importance for forest typology as well as to improve our understanding of earth-atmosphere-climate interactions or biogeochemical cycles. {T}he availability of satellite optical data with a high temporal resolution has permitted the identification of unexpected phenological cycles, particularly over the {A}mazon region. {A} primary issue in these studies is the relationship between the optical reflectance of pixels of 1 km or more in size and ground information of limited spatial extent. {I}n this paper, we demonstrate that optical data with high to very-high spatial resolution can help bridge this scale gap by providing snapshots of the canopy that allow discernment of the leaf-phenological stage of trees and the proportions of leaved crowns within the canopy. {W}e also propose applications for broad-scale forest characterization and mapping in {W}est-{C}entral {A}frica over an area of 141 000 km(2). {E}leven years of the {M}oderate {R}esolution {I}maging {S}pectroradiometer ({MODIS}) {E}nhanced {V}egetation {I}ndex ({EVI}) data were averaged over the wet and dry seasons to provide a data set of optimal radiometric quality at a spatial resolution of 250 m. {S}ample areas covered at a very-high ({G}eo{E}ye) and high ({SPOT}-5) spatial resolution were used to identify forest types and to quantify the proportion of leaved trees in the canopy. {T}he dry-season {EVI} was positively correlated with the proportion of leaved trees in the canopy. {T}his relationship allowed the conversion of {EVI} into canopy deciduousness at the regional level. {O}n this basis, ecologically important forest types could be mapped, including young secondary, open {M}arantaceae, {G}ilbertiodendron dewevrei and swamp forests. {W}e show that in {W}est-{C}entral {A}frican forests, a large share of the variability in canopy reflectance, as captured by the {EVI}, is due to variation in the proportion of leaved trees in the upper canopy, thereby opening new perspectives for biodiversity and carbon-cycle applications.},
  keywords = {{AFRIQUE} {DE} {L}'{OUEST} ; {AFRIQUE} {CENTRALE}},
  booktitle = {},
  journal = {{B}iogeosciences},
  volume = {10},
  numero = {11},
  pages = {6957--6967},
  ISSN = {1726-4170},
  year = {2013},
  DOI = {10.5194/bg-10-6957-2013},
  URL = {https://www.documentation.ird.fr/hor/fdi:010061339},
}