Journal of Research in Biology
JRB
Biology
http://biologyresearch.info/
0
2231-6280
2231-6299
en
2016
06
26
6
4
online
4
fulltext
en
Biodiversity change as a human impact gradient in the biosphere
reserve of Ferlo (Northern Senegal)
Biology
Original Research
The present study aims to investigate the biodiversity of woody vegetation along a gradient of human impacting region in the three constituent parts of Ferlo Biosphere Reserve (FBR): the core area, the buffer zone and the transition area. We conducted an inventory of 110 plots of 900 m² each. Total species richness was 49 species distributed in 32 genera within 16 botanical families. The analysis of contesimal frequency showed that Guiera senegalensis is the most common species with a presence of 75% of such records. Examination of species abundance spectrum showed that four most abundant species such as Guiera senegalensis (29.5%), Combretum glutinosum (15.9%), Pterocarpus lucens (11.6%) and Boscia senegalensis (10 , 5%). These four species represent 68% of the total individuals of the RBF and are also the four most common species. The spectrum of abundance of families showed that Combretaceae is the best represented family with almost half of the number of species (49.7%). The representativeness of biological types and geographical affinity of the species has been established for the woody vegetation in the study area. The study of diversity indices revealed that the buffer zone and the transition area are subjected to multiple uses and experiencing human action. It has a greater diversity and a level of organization with higher timber stand than the central area which is an integral conservation zone
Biosphere reserve - diversity - flora - abundance
2041
2053
http://jresearchbiology.com/documents/RA0587.pdf
NGOM
Daouda
ngom_daouda@yahoo.fr
Yes
Laboratoire d’Agroforesterie et d’Ecologie (LAFE) – Département d’Agroforesterie / UFR ST /, BP: 523, Université Assane Seck de Ziguinchor / Sénégal
DIABY
Nouhou
No
IFAN / Université Cheikh Anta Diop de Dakar / Sénégal
Léonard
AKPO
No
Laboratoire d’Ecologie et d’Ecohydrologie / Département de Biologie végétale / FST /, BP: 5005, UCAD / Sénégal