Spatial dynamic of sahelian vegetation: Analysis of modifications and natural resources disponibility in Burkina Faso, Western AfricaAbelKadébaUniversity of Ouagadougou (UNDESERT project)OuagadougouBurkina FasoMarcoSchmidtAbelKadébaassociatedPartyJoseph IssakaBoussimCo-ownerSoungaloSoulamaCo-owner2015-12-02Land cover change is a major driver for ecosystem quality. This dataset highlights the typology of sahelian vegetation degradation stages in general and particulary, describes glacis’s degradation stages through their functional and structural characterization. The study is typically based on the spatial variation of vegetation cover which is determined by combining satellite data, visual interpretations of vegetation cover and field investigations. Taking into account glacis’s degradation stages, phytosociological, dendrometrical, regeneration relevés were done. Soil sample were also taken in each degradation stage of glacis in order to understand the variation of physical and chemical parameters along the vegetation degradation gradient.
The following dataset were collected:
* Satellites images data
* Phytosociological data
-180 phytosociological relevés were done according to the geomorphological units
-104 phytosociological relevés were done according to the land degradation stage based on vegetation cover variation
* Dendrometrical data
104 dendrometrical data were done according to the land degradation stage based on vegetation cover variation.
* Regeneration data
104 regeneration data were done according to the land degradation stage based on vegetation cover variation.
* Soil data
60 soil samples were taken in each degradation stage at two deph (0-10 cm and 10-20cm)
burkina fasodegradation stagesdendrometryecosystems managementindicator variablesland coverphytosociologyregenerationsahelsatellite datasoil samplesObtain permission from data set owner(s)Gourouol catchment (Strict-Sahelian), Faga catchment (Sub-Sahelian) [UNDESERT study site 1]-0.6667-0.083113.166714.166720122015AbelKadébaUniversity of Ouagadougou (UNDESERT project)OuagadougouBurkina Fasokadebab@yahoo.fr
Collection/treatment of field and satellite data
The field data were collected by the mean of inventories according to the Braun-Blanquet phytosociological relevés methods. Dendrometrical and regeneration relevés were also done. Plot sizes were 50 m x 20 m for woody species , 10 m x 10 m for herbaceous species and 5 m x 5 m for regeneration. Rélévés were done according to the variation of the land cover. Several environmental variables, such as vital attributes of ecosystems were examined and characterized. Description
108 phytosociological relevés, 108 dendrometrical relevés ,108 regeneration relevés were done and 60 soil samples.
Satellite images were analyze to evaluate the land cover change over time and to extract the NDVI for land cover spatial variation.
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