@article{fdi:010042677,
  title = {{C}hanges in the availability and uses of wild yams according to climatic dryness and land-cover in {W}estern {B}urkina {F}aso ({W}est {A}frica) : a joint ecological and ethno-botanical approach using {GIS} and remote-sensing},
  author = {{D}evineau, {J}ean-{L}ouis and {A}urouet, {A}. and {D}ouanio, {M}. and {H}ladik, {A}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he regional variability in the uses of wild yams is assessed according to their availability in relation with land-use and climatic conditions from the {S}outh to the {N}orth sudanian sectors in {W}estern {B}urkina {F}aso. {T}he study involves field studies and modelling of the geographical distribution of yams and seeks correlations between environmental and ethno-biological data. {T}errain analysis consists of phyto-ecological surveys and interviews with local inhabitants. {A} cluster analysis of a multi-date image of data obtained by remote-sensing is used to assess land-cover. {T}he {B}ayesian post-probabilities of occurrence of each species are inferred using {W}eight of {E}vidence modelling linked to a {G}eographical {I}nformation {S}ystem. {T}he model is implemented with land-cover units and annual {M}oisture {A}vailability {I}ndex evidential-layers and is driven by species presence data. {T}he probabilities of occurrence of each species throughout the whole area as well as within and without the protected areas and in the vicinity of the sites of enquiries are calculated. {A} multi-factorial analysis makes it possible to shed light on the relationships among land use, the availability of yams, the uses of yams, knowledge and local practice. {R}esults provide statistical evidence of spatial association between the yam species and the environmental descriptors taken into account. {T}he study also provides evidence of an important regional variability in the actual uses and knowledge of wild yams. {T}he rather widespread use of wild yams as a food complement, in social relations and as merchandise in local trade in the {N}orth of the area studied, which is far less observed in the {S}outh, is one of the major components of this variability.},
  keywords = {{D}ioscorea ; {F}amine food ; {M}ulti-date image ; {P}rotected areas ; {S}udanian savannahs ; {L}andsat thematic mapper ; {U}ses, practices and knowledge ; {W}eight of evidence modelling},
  booktitle = {},
  journal = {{B}iodiversity and {C}onservation},
  volume = {17},
  numero = {8},
  pages = {1937--1963},
  ISSN = {0960-3115},
  year = {2008},
  DOI = {10.1007/s10531-008-9338-z},
  URL = {https://www.documentation.ird.fr/hor/fdi:010042677},
}