Cyanobacterial taxa of the Senegal River system (northern Senegal, West Africa)

Berger, C.; Ba, Ngansoumana; Gugger, Muriel

doi:10.1127/1864-1318/2005/0117-0147

Cited by 8 publications

(12 citation statements)

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“…Among the dominant cyanobacteria reported in these waterbodies, the filamentous species Cylindrospermopsis raciborskii and Anabaena solitaria are particularly abundant in Lake Guiers (LG) and the Dakar Bango Reservoir (DBR), which provide most of the drinking water for the cities of Dakar and SaintLouis, respectively. The colonial species Microcystis aeruginosa is also very abundant in the ponds in Djoudj Park, the world's third largest ornithological reserve (Berger et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

“…Algal blooms have been reported regularly in various shallow water sites in the Sudano-Sahelian region (Cogels et al, 2002;Akin-Oriola, 2003). Cyanobacterial blooms have developed in several water bodies connected to the Senegal River in its lower delta region (Berger et al, 2005) because of increasing agricultural activity since the impoundment of the river (Diama and Manantali dams) in the 1980s (Cogels et al, 2002). Among the dominant cyanobacteria reported in these waterbodies, the filamentous species Cylindrospermopsis raciborskii and Anabaena solitaria are particularly abundant in Lake Guiers (LG) and the Dakar Bango Reservoir (DBR), which provide most of the drinking water for the cities of Dakar and SaintLouis, respectively.…”

Section: Introductionmentioning

confidence: 99%

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Can tropical freshwater zooplankton graze efficiently on cyanobacteria?

Mendoza-Vera

Bouvy

et al. 2011

Hydrobiologia

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Zooplankton may at times graze cyanobacteria. However, their top-down effects are considered to be low, particularly in tropical regions dominated by small-size grazers that may be unable to consume efficiently filamentous or colonial species. Recently, cyanobacteria blooms were reported in the Senegal River hydrosystem. We conducted feeding experiments to assess the ability of copepods (Pseudodiaptomus hessei and Mesocyclops ogunnus), cladocerans (Moina micrura and Ceriodaphnia cornuta), and rotifers (Brachionus angularis, B. falcatus, and Keratella sp.) to control different cyanobacteria (Cylindrospermopsis raciborskii, Anabaena solitaria, A. flos-aquae, and Microcystis aeruginosa). None of the zooplankton species ingested M. aeruginosa. Mesocyclops ogunnus did not consume any of the cyanobacteria. Both cladocerans consumed the smallest filaments of cyanobacteria, whereas all the rotifers and P. hessei consumed a broader food-size spectrum. The functional feeding responses suggest that the concentration and size of the filaments are not the sole criteria for food consumption. The high zooplankton community grazing rates, estimated by applying the clearance rates measured in the laboratory to the in situ zooplankton abundance, indicate that grazing by zooplankton potentially constitutes an important controlling factor for the filamentous cyanobacteria in the tropics.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Can tropical freshwater zooplankton graze efficiently on cyanobacteria?

Mendoza-Vera

Bouvy

et al. 2011

Hydrobiologia

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“…Sur les 28 taxa identifiés jusqu'au niveau espèce, 17 ont été décrits pour la 1 ere fois au Sénégal par comparaison aux travaux de De Poucques (1956), de Dia et Reynaud (1982), de Compère (1991) Compère (1991) et Berger et al (2005).…”

Section: Discussionunclassified

Les Cyanophyceae marines de l’île de Ngor (Sénégal)

Gueye¹,

Ba²,

Bodian³

et al. 2014

Int. J. Bio. Chem. Sci

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“…Gas vesicles were present. When heterocytes were observed, they were often present in at least one of the apices (5.1 9 2.3 lm), (Hindák, 1988;Berger et al, 2005;Komárek, 2005) Anabaenopsis elenkinii…”

Section: Cylindrospermopsis Raciborskii (Woloszyńska) Seenayya Et Submentioning

confidence: 97%