||Current floristic composition, life form and productivity of grasslands in the hunting zone of Djona, Benin
AHOUDJI Myrèse C. ,
TEKA OSCAR SEMADEGBE ,
Axelsen Jorgen ,
Houinato Marcel ,
||Journal of Applied Biosciences (JABS)
||Objectives: This paper addressed temporal changes in floristic composition, plant communities’ structures and
productivity of grasslands. The study was conducted in the Hunting zone of Djona in the Transboundary
Biosphere Reserve of W (TBRW) Benin.
Methodology and Results: For these purpose 30 plots of 900m² were used and “phytosociological relevés” were
done following ecological uniformity, floristic homogeneity and samples representativeness to established
plants communities. Biomass was estimated in 30 plots of 100 m². Results showed that the greatest
productivity value (8320 ± 0.21 kg DM/ha) was observed in Andropogon gayanus-Schizachyrium sanguineum
grassland. The dominant life forms in all plants communities of the study area are the phanerophytes followed
by therophytes. For chorological types, all plants communities are dominated by the species of the Sudanian
base element and species with broad distribution.
Conclusions and application of findings: The identified life forms and chorological types showed an evolution of
the post farming pastures to woodlands and savannas vegetation, which explains the current floristic
composition of the area. Moreover, it will be possible to model the impact of grasslands exploitation on the
viability of the protected area particularly in the context of climate change and for this, it’s important to
undertake a long-term study in order to take into account all variations and all causes of these variations.
||Grasslands, productivity, floristic composition, protected area, Benin
||6753 - 6762