Macizo de Tagant

Macizo de Tagant


Vegetation. Lake Gabou

Bordering as it does the Sahara and the Sahel, the Tagant Plateau offers a diversity of vegetation unique in Mauritania. The shores of permanent body waters support Acacia nilotica which thrives in waterlogged ground.

The lagoons themselves offer a varied flora (Potamogeton sp. Nympaea lotus, Phragmites australis, Juncus sp., Cyperus difformis, Cyperus rotundus, Cyperus sculentus). The desert oases, centred around permanent pools, are planted with date palms Phoenix dactylifera, and also include the doum palm (Hyphaene thebaica).

Desert steppe

The extensive plains of sandy or pebbly ground are occupied by woody desert steppe vegetation, a thin and species-poor formation characteristed by (Balanites aegyptiaca, Boscia senegalensis, Maerua crassifolia, Leptadenia pyrotecnica y Capparis decidua). Monospecific stands of Calotropis procera occur where land has been degraded by overgrazing. The mobile dunes or ergs which cross the basin haphazardly are extremely poor in plant species but these include acacias and brooms (A. ehrenbergiana and A. raddiana, Leptadenia pirotécnica) as well as the grass Stipagrostis pungens.

The regs, or stony desert plains, are very widespread in the Tagant basin, where they are characterised by a low density of vegetation (Acacia ehrenbergiana, Balanites or Maerua). The desert savanna extends along the south of the massif and is dominated by the grass Panicum turgidum, with more or less scattered shrubs of Balanites, Boscia or Maerua. The most resilient elements of the Sahelian flora occur along the southernmost fringe of the plateau, the most outstanding elements being the baobab (Adansonia digitata) and the desert rose (Adenium obesum).

List of illustrated plants

Acacia ehrenbergiana
Acacia nilotica
Acacia senegal
Acacia tortilis raddiana
Adamsonia digitata
Adenium obesum
Aerva javanica
Balanites aegyptiaca
Bergia suffruticosa
Boscia senegalensis
Calotropis procera
Capparis decidua
Cassia italica
Cassia sp.
Cenchrus biflorus
Cenchrus ciliaris
Citrullus colocynthis
Cleome viscosa
Combretum aculeatum
Euphorbia balsamifera
Fagonia longispina
Farsetia aegyptiaca
Heliotropium ramosissimum
Hyphaene thebaica
Imperata cilindrica
Indigofera sp.
Jatropha chevalieri
Leptademia pirotécnica
Maerua crasifolia
Maerua crassifolia
Marsilea sp.
Morettia philaeana
Nymphaea lotus
Panicum turgidum
Phoenix dactilifera
Rhynchosia minima
Ricinus communis
Sesamum alatum
Spergula fallax
Tribulus terrestris
Verbena supina