Abstract

This is a study based on the structural and demographic characterization of crested-burnt forest species, 4th communal section of Mirebalais would reveal of capital importance for the conservation of biodiversity and the attenuation of the mitigation of climate change. Dendrometry inventory was carried out through fixed surface plots or 100m x 100m quadrats systematically placed on transects. A total of 15 plots were surveyed for the study. Trees ≥3cm in diameter were measured at 1.30m (DBH) and at 30cm for multi-stemmed shrubs. Trees with diameters <3cm were considered to be regeneration. In fact, the total height was measured by the method of aiming with a clinometer. The nomenclature used to classify species and families is APG IV. The results showed that the study area has a partial species richness of 40 species divided into 39 genera and 24 families. Floristic analysis showed that the Fabaceae family was the most representative with 11 species. The actual density (Dr) of trees varies from 30±85 trees/ ha-1 while the regenerating density (Nr) of trees oscillates from 0.025±0.64 trees / ha-1. The diametric structure exhibited a dominance of trees of small diameters, on the other hand, for the vertical structure it was found that as the height classes increase, the trees of large sizes become more and more rare. The correlation coefficient between the height and the diameter is very low with R2 between 0.5%±20%. In addition, the Shannon index oscillated by 2.19±2.59 bits. Furthermore, Piélou’s fairness varies from 0.71±0.79. Also, the specific quotient is 1.02. Macrophanerophytes are the most dominant biological types. Furthermore, the Jaccard index (PJ) is between 14.28±21.43. Finally, the Hamming distance (H) in turn oscillates by 79.07±85.72.

Keywords: Characterization; DBH; Dendrometry; Diversity; Structure; Woody