|Location||Uzbekistan, Karakalpakstan autonomous region|
|Central coordinates||56o 18.45' East 42o 35.49' North|
|IBA criteria||A1, A3|
|Altitude||46 - 78m|
|Year of IBA assessment||2008|
Site description The IBA is located in the south of the Karakalpak Ustyurt in the Asske-Audan depression. In the past the southern parts of the Assake-Audan and Sarykamish Depressions formed a common lake basin through which the Amudarya flowed and where the Uzboy river began flowing into the Kaspiy. Currently this is rather deep depression is difficult to access and has well-marked precipices in some places. There are several artesian wells with brackish water in the depression. There are dense thickets of reed and tamarisk around the wells covering about 2.5 km2. The site includes part of the depression and the adjoining highlands in the north and north-west with Haloxylon forests.
Key Biodiversity The number of species occurring at Assake-Audan is not known accurately as it is a place where many species passing the Ustyurt Plateau stop. Their occurrence is connected with the availability of water. Also Assake-Audan is situated between the Kaspiy, the Aral and the northern part of Sarykamysh lake so that it functions as a staging post for birds on several intersecting of flyways. Two days of IBA fieldwork recorded Ardea cinerea, Accipiter nisus, Circus cyaneus, Rallus aquaticus, Calandrella rufescens, Hirundo rustica, Motacilla alba, Luscinia svecica, Cettia cetti, Sylvia curruca, Phylloscopus collybita, Fringilla coelebs, Fringilla montifringilla, Rhodospiza obsoletus, Passer domesticus, Sturnus vulgaris, Emberiza bruniceps and Corvus frugilegus. The remains of a dead gull were also found.
Non-bird biodiversity: The mammal fauna is very similar to that of the Ustyurt in general. Typical species include Ovis vignei (UzRDB) which was present in 1956; and Gazella subgutturosa (UzRDB) and Saiga tatarica (RL). Paraemichinus hupomelas (UzRDB) and Testudo horsfieldi (RL) occur according to the literature. Flora: Malococarpus crithmifolius and Euphortia sclerocyathium are included in the National Red Book.
|Species||Season||Period||Population estimate||Quality of estimate||IBA Criteria||IUCN Category|
|Saker Falcon Falco cherrug||breeding||2007||2-4 individuals||good||A1||Endangered|
|Chlamydotis undulata||breeding||2007||2-4 individuals||good||A3||Not Recognised|
|Pallas's Sandgrouse Syrrhaptes paradoxus||breeding||2007||10-15 individuals||good||A3||Least Concern|
|Turkestan Ground-jay Podoces panderi||breeding||1937-2007||3-6 individuals||medium||A3||Least Concern|
|Brown-necked Raven Corvus ruficollis||breeding||2007||2-4 individuals||medium||A3||Least Concern|
|Desert Warbler Sylvia nana||breeding||2007||20-40 individuals||good||A3||Least Concern|
|Desert Finch Rhodopechys obsoletus||breeding||2007||10-50 individuals||good||A3||Least Concern|
|Red-headed Bunting Emberiza bruniceps||breeding||2007||15-30 individuals||good||A3||Least Concern|
|2008||low||not assessed||not assessed|
|Medium - based upon reliable but incomplete / partially representative data|
|Energy production and mining||oil and gas drilling||happening now||some of area/population (10-49%)||no or imperceptible deterioration||low|
|IUCN habitat||Habitat detail||Extent (% of site)|
|Desert||Desert & semi-desert - clay; Desert & semi-desert - salty||85%|
|Rocky areas||Inland cliffs||10%|
|Land-use||Extent (% of site)|
|energy production and mining||5%|
Protection status There are no Protected Areas.
References Data of the UZ IBA Uz Expedition, October 2007. Report.
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Recommended citation BirdLife International (2015) Important Bird Areas factsheet: Northern part of the Assake-Audan depression. Downloaded from http://www.birdlife.org on 04/10/2015
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