Wetlands International Indonesia Programme

The site is a lowland area within the Mahakam lowland region, at the middle course of Mahakam river. An extensive floodplain forms three major lakes in the area, namely : Lake Semayang (12,000 ha), Lake Melintang (13,000 ha), and Lake Jempang (15,000 ha). Some smaller lakes occur are L.Batu Bumbu (450 ha), L.Lokang (400ha), L.Siran (750 ha) and L.Jantur (200 ha). This site includes the entire lakes and waterway system of Mahakam river. The lakes are unique and of value to waterbirds. The Mahakam river is inhabited by a distinct subspecies of the rare Freshwater Dolphin Orcaella brevirostis. The surrounding forest includes vast areas of freshwater swamp and peatswamp forest. Huge areas of the peat swamp forest were destroyed in the 1982/83 forest fires. Based on Landsat TM imagery 1996, the remaining extensive peat swamp forest occur at the north of Lake Melintang. The main peat swamps are thought to be domed-shape, with Gambut Land System. However, areas surrounding the lakes which is an alluvial plains are open areas. This area is inhabited by large numbers of people and the river is important for transport, and fishing activity. To date, the lakes face threats from high rate of sedimentation. Land clearings at the catchment areas of the Mahakam river have worsen this situation and threat the protected Mahakam Dolphin species. According to Rahmat (1996), weeds have covered almost 75% of the surface area of the lakes. The main weeds include Eichornia crassipes, Salvinia natans, Panicum stagninum, Panicum colonum, and Mimosa nigra. The weeds have formed some floating "islands" .

Site Location

The wetland site is located in East Kalimantan Province, at the middle course of Mahakam river.

Special Memmo

The Perairan Sungai Mahakam includes the entire lakes (Mainly Lake Semayang, Lake Jempang and Lake Melintang) and waterways system of Mahakam river and surrounding peat swamp forests. The site is recognized as habitat for the rare freshwater dolphin: O

List of Birds (124 species)

Species	Red Data Book	Cites
Accipiter gularis		App II
Acrocephalus orientalis
Acrocephalus stentoreus
Actitis hypoleucos
Aegithina tiphia
Alcedo atthis
Alcedo euryzona	Vulnerable
Alcedo meninting
Amaurornis phoenicurus
Anas querquedula
Anhinga melanogaster	Lower Risk
Anthracoceros albirostris		App II
Anthracoceros malayanus	Lower Risk	App II
Apus affinis
Ardea purpurea
Ardeola speciosa
Artamus leucorhynchus
Blythipicus rubiginosus
Bubulcus ibis
Buceros rhinoceros		App II
Butorides striatus
Cacomantis merulinus
Calidris ferruginea
Calidris ruficollis
Calidris subminuta
Calidris temminckii
Calidris tenuirostris
Caprimulgus affinis
Celeus brachyurus
Centropus bengalensis
Charadrius dubius
Charadrius mongolus
Chlidonias hybridus
Chlidonias leucopterus
Ciconia stormi	Endengered
Clamator coromandus
Collocalia fuciphaga
Copsychus malabaricus
Copsychus saularis
Cuculus sparverioides
Cymbirhynchus macrorhynchos
Cyornis superbus
Cyornis turcosus	Lower Risk
Dendrocygna arcuata
Dicaeum chrysorrheum
Dupetor flavicollis
Egretta alba
Egretta garzetta
Egretta intermedia
Elanus caeruleus		App II
Eurystomus orientalis
Falco peregrinus		App I
Gallinago gallinago
Gallinago megala
Gallinula chloropus
Haliaeetus leucogaster		App II
Haliastur indus		App II
Hemicircus concretus
Hirundapus giganteus
Hirundo rustica
Hirundo tahitica
Hypothymis azurea
Ichthyophaga humilis	Lower Risk	App II
Ichthyophaga ichthyaetus	Lower Risk	App II
Irediparra gallinacea
Ixobrychus cinnamomeus
Ixobrychus sinensis
Lalage nigra
Leptoptilos javanicus	Vulnerable
Limosa lapponica
Limosa limosa
Locustella certhiola
Locustella ochotensis
Lonchura fuscans
Lonchura malacca
Loriculus galgulus		App II
Megalaima australis
Merops philippinus
Microhierax fringillarius		App II
Motacilla flava
Nectarinia jugularis
Numenius madagascariensis	Lower Risk
Numenius phaeopus
Nycticorax nycticorax
Pandion haliaetus		App II
Pelargopsis capensis
Pernis ptilorhynchus		App II
Phaenicophaeus chlorophaeus
Phaenicophaeus curvirostris
Phaenicophaeus sumatranus
Phalaropus lobatus
Picoides moluccensis
Pluvialis fulva
Pluvialis squatarola
Porphyrio porphyrio
Porzana cinerea
Porzana fusca
Prinia flaviventris
Pseudibis davisoni	Endengered
Psittacula longicauda		App II
Pycnonotus atriceps
Pycnonotus goiavier
Rhipidura javanica
Rhizothera longirostris
Spilornis cheela		App II
Spizaetus cirrhatus		App II
Spizaetus nanus	Vulnerable	App II
Sterna albifrons
Sterna bergii
Streptopelia chinensis
Sturnus philippensis	Lower Risk
Terpsiphone paradisi
Treron capellei	Lower Risk
Treron fulvicollis	Lower Risk
Treron olax
Treron vernans
Trichastoma rostratum	Lower Risk
Tringa glareola
Tringa hypoleucos
Tringa nebularia
Tringa ochropus
Tringa stagnatilis
Tringa terek
Tringa totanus

List of Mamal (9 species)

Species	Red Data Book	Cites
Bos javanicus	Endengered
Cervus unicolor
Helarctos malayanus	Deficient Data	App I
Hylobates muelleri	Critically Endengered	App I
Macaca fascicularis	Lower Risk	App II
Nasalis larvatus	Vulnerable	App I
Neofelis nebulosa	Vulnerable	App I
Orcaella brevirostris	Deficient Data	App II
Sus barbatus	Lower Risk

List of Fish (0 species)

List of Crustaseans (0 species)

List of Mollusk (0 species)

List of Fish (0 species)

List of Reptile (3 species)

Species	Red Data Book	Cites
Crocodylus porosus	Vulnerable	App II
Crocodylus siamensis	Critically Endengered	App I
Tomistoma schlegeli	Deficient Data	App I

List of Vegetation (3 species)

Species	Red Data Book	Cites
Eichhornia sp.
Mimosa natans
Salvinia natans