TITLE:
Characterization and Risk Assessment of the Collapse of the Woody Stand of Ecosystems of the Fathala Forest (Saloum Delta Biosphere Reserve-Senegal)
AUTHORS:
Eric Kaly, Oumar Sarr, Sékouna Diatta, Abdoul Aziz Diouf, Djibril Diouck, Daouda Ngom
KEYWORDS:
Plant Formation, Woody Stand, Assessment, Collapse of Density and Cover
JOURNAL NAME:
American Journal of Plant Sciences,
Vol.12 No.7,
June
30,
2021
ABSTRACT: The objective of this study
is to characterize and assess the risk of collapse of woody plant formations in
the Fathala forest. In recent years, this forest has suffered a sharp reduction
in its plant cover to the point of compromising the survival of populations of
certain animal species such as the Red colobuses. The methods used are
respectively constituted by the transect method, the dendrometric statements
method and that of establishing the red list of ecosystems of the IUCN. The
specific richness comprises 56 species divided into 47 genera and 22 families.
The density is higher in the unfenced area (369 ind/ha in clear forest and 53
ind/ha in gallery forest) compared to the fenced area (160 ind/ha in clear
forest versus 48 ind/ha in gallery forest). A study of the plant formations
shows a strong degradation of the ecosystems passing from a clear and dry
Sudanese forest to a wooded savannah. The cover rate in the fenced area is 20%
in gallery forests and 25% in clear forests; in the unfenced area, it is 19%
and 23% in gallery forests and clear forests, respectively. The application of
the IUCN criteria shows an annual rate of collapse is -6 ind/ha in gallery forests and -4 ind/ha in clear forests. The annual rate of cover
collapse would be -3.75% and -2.9% for gallery forests and clear forests, respectively.
These results classify the forest in the Critically Endangered category. The
main factors responsible for this degradation are, among others, anthropogenic
actions and climatic pejoration. These results could constitute a basic tool
for undertaking an improvement in the management of this forest, which is a
living environment for an animal species.