Temperature - European Investment Bank

WEST AFRICAN POWER POOL (WAPP) PÖYRY ENERGY LTD.
Mount Coffee HPP ESIA and RAP 2012-09-18
ESIA Report Page 58
9.1.1.2 Characteristic of the Vegetation and the Flora in Downstream Area
The human activities have destroyed very much of the vegetation in the downstream. In
0.2 ha, only 99 trees were identified representing 25 plant families and belonging to 42
plant species. The most dominant plant families are Bombacaceae (mainly represented
by Ceiba pentandra), Burseraceae (mainly represented by Dracryodes klaineana),
Fabaceae-Caesalpinioideae (mainly represented by Pterocarpus santalinoides) and
Humiriaceae (mainly represented by Saccoglottis gabonensis). The most abundant
families are Burseraceae (represented by Dacryodes klaineana), Fabaceae-Faboideae
(Pterocarpus santalinoides) and Fabaceae-Caesalpinioideae (mainly represented by
Tetraberlinia tubmaniana).
In the downstream area, the most dominant and abundant species is Dacryodes klaineana,
followed by Ceiba pentandra and Pterocarpus santalinoides. The following families and
corresponding species were here and there identified in the downstream area:
Bombacaceae for Bombax bunopozens, Sterculiaceae for Sterculia tragacantha et
Theobroma cacao, Anacardiaceae for Pseudospondia microcarpa, Miliaceae for
Entandrophragma cylindrica, Dracaenaceae for Dracaena arborea, Moraceae for Ficus
mucuso, Gramineae for Bambusa vulgaris, Arecaceae for Raphia hookeri,
Melastomataceae for Memecylon blackeoides and Rubiaceae for Morinda geminata. With
the families of Anacardiaceae, Dracaenaceae, Graminaceae, Arecaceae, Melastomataceae
recorded outside the parcels, 30 plant families in total were identified for 52 plant species.
Herbs like Menanthera scandens, Passiflora foetida, Euphorbia hirta, Aspilia africana
were observed in wet medium.
9.1.1.3 Characteristic of the Vegetation and the Flora in the Reservoir
Two hundred and ninety two (292) trees were identified in 0.5 ha of the reservoir. They
belong to 16 families and 33 plant species. The most dominant and abundant families
here are: the Euphorbiaceae, predominantly represented by Hevea brasiliensis, the
Fabaceae-Faboideae whose main representatives are: Pterocarpus santalinoides which
constitutes a monospecific forest in some parts of the reservoir, the Rubiaceae, mostly
represented by Nauclea pobeguini and Nauclea diderrichii.
Fabaceae-Faboideae is the most important local plant family, not taking into
consideration Hevea brasiliensis (Robber tree, introduced by man in Agroforests).
Pterocarpus santalinoides is the most abundant plant in the reservoir followed by
Nauclea pobeguini. Whilst it is Pentaclethra macrophylla and Nauclea diderrichii are
the most dominant plant species.
The fallow land and the young secondary forests is characterized by the abundance of
Alchornea cordifolia, Chromolaena odorata, Phyllanthus sp, Nephrolepsis biserratta,
Smilax kraussiana, Dalbergia ecastaphyllum, Tetracera alnifolia, Tetracera potatorum,
Buforestia manni, Scleria verrucosa and S. naumanniana. Dominant herbs grow very
near the river bank. They are Ludwigia decurrens, Polygonum lanigerum, Heliotropium
indicum and Mimosa invisa.
9.1.1.4 Characteristic of the Vegetation and the Flora in the Upstream Area
One hundred and ninety trees (190) were identified in 0.3 ha plot in upstream area. They
belong to 29 plant families and 72 plant species. The family of Fabaceae-
Caesalpinoideae is far more dominant, following by Olacaceae, Fabaceae-Mimosoideae