Authors :
Nouhou ALI; Amadou GARBA
Volume/Issue :
Volume 8 - 2023, Issue 6 - June
Google Scholar :
https://bit.ly/3TmGbDi
Scribd :
https://tinyurl.com/mrxf6tes
DOI :
https://doi.org/10.5281/zenodo.8126010
Abstract :
The combined effects of climate change and
increasing anthropogenic activities (deforestation,
intensification of agriculture, overgrazing, timber
exploitation, urbanization, etc.), threaten the existence of
biodiversity on earth. Indeed, several climate projections
predict scenarios that foresee the combined adverse
effects of these scourges on the existence of habitats
favorable to the distribution of several woody
agroforestry species (ELA), of socio-economic
importance, on earth. The objective of this study is to
determine the impact of climate change on the extent of
favorable areas for the future distribution of Vitellaria
paradoxa C.F. Gaertn. In Niger. This distribution was
modeled using the maximum entropy approach.
Environmental data, such as bioclimatic variables,
as well as geo-referenced occurrence data of the species
were used in MaxEnt 3.3.3k software to produce a
distribution model. For future climate projections, two
emission scenarios (Representative Concentration
Pathways (RCP)) were used. These are the optimistic
scenario (RCP 4.5) and the pessimistic scenario (RCP
8.5) which are the most appropriate for Africa by 2050.These
results obtained are essential for future conservation
programs for this species in Niger. To this end, any
project or program to restore the density of the
populations of this species must take into account this
result.
Keywords :
Agroforestry species - Vitellaria paradoxa - climate change – Niger.
The combined effects of climate change and
increasing anthropogenic activities (deforestation,
intensification of agriculture, overgrazing, timber
exploitation, urbanization, etc.), threaten the existence of
biodiversity on earth. Indeed, several climate projections
predict scenarios that foresee the combined adverse
effects of these scourges on the existence of habitats
favorable to the distribution of several woody
agroforestry species (ELA), of socio-economic
importance, on earth. The objective of this study is to
determine the impact of climate change on the extent of
favorable areas for the future distribution of Vitellaria
paradoxa C.F. Gaertn. In Niger. This distribution was
modeled using the maximum entropy approach.
Environmental data, such as bioclimatic variables,
as well as geo-referenced occurrence data of the species
were used in MaxEnt 3.3.3k software to produce a
distribution model. For future climate projections, two
emission scenarios (Representative Concentration
Pathways (RCP)) were used. These are the optimistic
scenario (RCP 4.5) and the pessimistic scenario (RCP
8.5) which are the most appropriate for Africa by 2050.These
results obtained are essential for future conservation
programs for this species in Niger. To this end, any
project or program to restore the density of the
populations of this species must take into account this
result.
Keywords :
Agroforestry species - Vitellaria paradoxa - climate change – Niger.
