| dc.description.abstract | Within the framework of the rehabilitation of the
National park of Manda located at the South of Chad, a
study was conducted in order to improve and to reactualize
information on the natural resources in general,
precondition to the development of management plans. One
of the causes of failure in the attempts at rehabilitation of
this park was the ignorance of its ecosystems. This work was
therefore, primarily focused on the knowledge of diversity
and on the structure of the herbaceous vegetation of the
park. The study was carried out following phytosociological
relevés according to the traditional Braun-blanquetiste
method and the park was divided into four zones of study. It
was inventoried 369 species gathered in 195 genera and 58
families starting from 128 relevés. The most species belonged
to families of Poaceae, Fabaceae, Malvaceae, Cyperaceae and
Asteraceae. The factorial analysis of correspondence allowed
recognizing 9 herbaceous groups where the majority was
also known in several tropical Africa areas. The biomass
noted starting from the rate of average covering
(approximately 90% in rainy season) proved that the
pastures of the park could still support an important
wildlife. | en_US |
