Current view: Text account
Site description (2001 baseline):
Site location and context
The site is located 35 km west of Belo-sur-Tsiribihina. The Tsiribihina delta includes the shoreline, sandbanks, lagoons, coastal mudflats, mangrove forest, saltflats, and areas of marsh and of dry land. The mangrove is 2–4 m high, and dominated by trees of
Avicennia,
Rhizophora,
Ceriops,
Bruguiera and
Sonneratia. The saltflats often flood during the rainy season. The marshy areas are dominated by sedge
Cyperus, reed
Phragmites and non-native water-hyacinth
Eichhornia, while the dry land is covered in savanna, with palms. The wetlands of the upper Tsiribihina river include the neighbouring lakes, and the Sahajilo and Mania rivers. Lake Kimanomby, west of Ambohibary village, is surrounded by dense, dry deciduous forest (Ambovondambo Forest to the west, Marotapia Forest to the east). There is no floating vegetation, but the margins are covered by
Eichhornia. Lake Masoarivo, west of Masoarivo village, is small, shallow and red due to muddy sediments. Lake Hima has floating vegetation and is surrounded by fishermen’s camps. In the Tsiribihina valley, between the towns of Miandrivazo and Malaimbandy, there are several lakes and a vast area of marshes, dominated by sedge
Cyperus and reed
Phragmites.
See Box and Tables 2 and 3 for key species. Eighty-two species have been recorded, of which 22 are endemic to Madagascar. There are a few pairs of
Haliaeetus vociferoides, including at least one in the upper valley of the Tsiribihina, and
Anas bernieri breed in the mangroves. There are large congregations of
Glareola ocularis on the banks of the Tsiribihina, and one of the most significant congregations of
Thalassornis leuconotus insularis in Madagascar can be found in Masoarivo.
Non-bird biodiversity: Lemurs: Propithecus verreauxi deckeni (VU), P. verreauxi coronatus (CR). Reptile: Boa madagascariensis (VU).
Pressure/threats to key biodiversity
Human activities in the mangroves include exploitation for construction wood and firewood, and collection of nestling waterbirds for food. Close to the mouth of the Ambakivao river, hunting is frequent near the areas that support large congregations of
Phoenicopterus ruber. In the upper Tsiribihina, there is also significant pressure resulting from hunting and conversion of marshes to rice-fields.
Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Wetlands of the Tsiribihina delta and upper Tsiribihina river (Madagascar). Downloaded from
https://datazone.birdlife.org/site/factsheet/wetlands-of-the-tsiribihina-delta-and-upper-tsiribihina-river-iba-madagascar on 23/11/2024.
