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Location Turkey, Istanbul
Central coordinates 28o 32.00' East  41o 5.00' North
IBA criteria A1, A4i, A4iii, B1i, B2
Area 5,118 ha
Altitude 6 m
Year of IBA assessment 2004

Doga Dernegi (Partner Designate)



Site description A freshwater lake situated west of Ýstanbul where the Karasu stream reaches the Marmara Sea. The stream was dammed to create a drinking water reservoir; during dry years less than 25% of the lake area remains flooded. Mudflats, sandbanks and reedbeds (Phragmites) have formed where silt deposition occurs. South of the dam is a brackish lake with reed fringes and islands. The lake is largely surrounded by arable land and, increasingly, industrial and residential development. Motorways cut across both ends of the lake.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Red-breasted Goose Branta ruficollis winter  1998  75-80 individuals  A1, B2  Endangered 
Common Pochard Aythya ferina winter  1996  14,036 individuals  A4i, B1i  Least Concern 
Larus michahellis winter  1996  1,250-8,775 individuals  B1i  Not Recognised 
Mediterranean Gull Larus melanocephalus passage  1995  10,000 individuals  A4i, B1i  Least Concern 
Little Gull Hydrocoloeus minutus passage  1991  1,740 individuals  A4i, B1i  Least Concern 
A4iii Species group - waterbirds winter  1996  22,681 individuals  A4iii   

Habitats

IUCN habitat Habitat detail Extent (% of site)
Wetlands (inland) Standing freshwater; Water fringe vegetation  100%

Land use

Land-use Extent (% of site)
water management 100%

Protection status National High International None2,850 ha of IBA covered by Drinking Water Reservoir (Büyükçekmece Gölü, 2,850 ha).

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Recommended citation  BirdLife International (2014) Important Bird Areas factsheet: Büyükçekmece Lake. Downloaded from http://www.birdlife.org on 27/08/2014

To provide new information to update this factsheet or to correct any errors, please email BirdLife