Diatoms of Dindifelou fall (upper Basin of the Gambia River, Senegal): floristic inventory.
The Dindifelou fall, located in south-eastern Senegal,
receives its water from discharging springs located in
Dande plate-land. These waters form, at the foot of the cliff,
a pond that drains into the Thiokoye, a tributary of the
Gambia River. The water quality of the pond and the
stream is very good based on physicochemical analyses.
Around the pond region, a microclimate characterized by a
higher humidity and a lower temperature compared with
the surrounding area is present. Diatoms study is carried
out in different habitat types associated with this fall. The
samples were taken by scraping the surface of rocks and
rinsing fern leaves with sparkling water. Dande plate-land
is made of Upper Proterozoic sandstones whose gravity
accumulations litter the bottom of the pond and the stream.
This study allowed us to inventory 61 species and varieties
of diatoms belonging to 28 genera. The most represented
genera are Achnanthidium (ten species), Eunotia and Pinnularia
(eight species each). Twelve species and varieties are
reported for the first time in Senegambia including five of
the genera Achnanthidium. The microflora is dominated by
Achnantidium minutissimum and Achnanthidium catenatum,
followed by Ulnaria ulna and various species of the genera
Eunotia and Brachysira. Aerial habitats are more diversified
here than the epilithic samples.
Auteur(s) : SOW (E.), FOFANA (C.A.K.) & AW C.
Pages : 352-362
Année de publication : 2013
Revue : African Journal of Ecology
N° de volume : 51 (4)
Type : Article
Mise en ligne par : SOW El Hadji