The mangrove species of East Africa
Nine true mangrove species occur along the East African coast; four dominate the Lamu map.
Nine true mangrove species are usually listed for the Kenyan coast. They differ in roots, leaves and the zone they prefer.
| Species | How to recognise it | Usual zone |
|---|---|---|
| Rhizophora mucronata | Tall stilt roots, long pencil-like seedlings | Middle, regularly flooded |
| Avicennia marina | Pencil roots rising from the mud, silvery leaf undersides | Seaward fringe and drier flats |
| Ceriops tagal | Small, many-stemmed, buttressed base | Inner, drier zone |
| Sonneratia alba | Cone-shaped breathing roots, round leaves | Open seaward fringe |
| Bruguiera gymnorhiza | Knee roots, large buttress | Inner zone |
| Xylocarpus granatum | Large buttresses, round woody fruit | Inner, creek edges |
| Lumnitzera racemosa | Small tree with white flowers | Landward edge |
| Heritiera littoralis | Large, ridged fruit | Landward edge |
| Pemphis acidula | Shrub on rocky shores | Rocky, coral coasts |
Atlas names four in its formation classes (Rhizophora, Avicennia, Ceriops and Sonneratia) because those are the ones the Lamu mapping team could separate from the air.
Why species matter. Rhizophora is the traditional building-pole species and is cut most; Avicennia tolerates the most salt and often recolonises damaged ground; Ceriops is sought for firewood and tannin.
Related reading
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- What Atlas is, and why it is more than a mangrove map
- Who manages mangroves in Kenya?
- Reading the sea-turtle tracking data
- How to read a hot-spot map
- Mangrove zonation: why different species grow in bands
- What is blue carbon?
- Seagrass meadows: blue carbon's quiet partner
- What mangroves do for people (ecosystem services)
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