|Central coordinates||5o 58.00' East 52o 38.00' North|
|IBA criteria||A4iii, B1i, C2, C4, C6|
|Year of IBA assessment||2000|
Ornithological information This is an important roost for geese Anser from surrounding feeding areas, but counts underestimate numbers. The average seasonal peak number of waterbirds during 1992-1996 exceeded 20,000.
Site description A freshwater lake with extensive reedbeds, bounded in the north by the dyke of Noordoostpolder (reclaimed in 1942) and in the south by the mainland (province of Overijssel). The Zwarte Water river (090) flows into the lake in the north-east corner, and the site is adjacent to Lake Ketelmeer (039) in the west (Ramspol). The north-eastern border is close to De Wieden (065). There is a shipping lane (dredged). This site, together with site 047, formed part of a single, larger site (former site NL028) in the previous pan-European IBA inventory (Grimmett and Jones 1989).
|Species||Season||Period||Population estimate||Quality of estimate||IBA Criteria||IUCN Category|
|Eurasian Spoonbill Platalea leucorodia||passage||1991||44 individuals||good||B1i, C2||Least Concern|
|Purple Heron Ardea purpurea||breeding||1991||24 breeding pairs||good||C6||Least Concern|
|A4iii Species group - waterbirds||unknown||-||20,000 individuals||unknown||A4iii, C4|
|Protected area||Designation||Area (ha)||Relationship with IBA||Overlap with IBA (ha)|
|Zwarte Meer||Nature Conservation Law||1,650||protected area contained by site||1,650|
|Zwarte Meer||Wetlands of International Importance (Ramsar)||2,050||protected area contained by site||2,050|
|Zwarte Meer - NL2003056||Habitats Directive||2,191||is identical to site||2,180|
|Zwarte Meer - NL9802031||Birds Directive||2,200||is identical to site||2,180|
|Zwarte Meer II||Natural Monument||206||protected area contained by site||206|
|Zwarte Water en Overijsselse Vecht - NL9902003||Birds Directive||1,424||protected area is adjacent to site||0|
|IUCN habitat||Habitat detail||Extent (% of site)|
|Wetlands (inland)||Standing freshwater; Water fringe vegetation||96%|
|Land-use||Extent (% of site)|
|nature conservation and research||81%|
Management considerations The main threats are nutrient pollution (as at site 039, but problems are greater here as the lake is shallower), commercial reed-harvesting (`Other' threat, above), disturbance caused by wildfowl hunting, and the construction of a storm-surge barrier on the west side at Ramspol.
Protection status National Partial International High1,650 ha of IBA covered by Natural Monument (Zwarte Meer, 1,650 ha). 206 ha of IBA covered by Natural Monument (Zwarte Meer II, 206 ha). 2,050 ha of IBA covered by Special Protection Area (Zwarte Meer, 2,050 ha). 2,050 ha of IBA covered by Ramsar Site (Zwarte Meer, 2,050 ha).
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Recommended citation BirdLife International (2013) Important Bird Areas factsheet: Lake Zwartemeer. Downloaded from http://www.birdlife.org on 19/06/2013
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