|Central coordinates||22o 4.83' East 65o 37.90' North|
|IBA criteria||B2, C2, C6|
|Altitude||2 - 5m|
|Year of IBA assessment||2000|
Site description A shallow (1-4 m in depth) nutrient-rich lake at the head of the Gulf of Bothnia, formed when rising land isolated a bay from the sea. Fine marine sediments with overlying mud deposits cover the lake floor. Water exchange is minimal due to the low rate of inflow to the lake. Large sections of the shoreline are marshy, with Phragmites, Typha and Equisetum present; the lake itself supports floating vegetation. Mixed forests surround the lake.
Key Biodiversity The IBA is important for breeding waterbirds, waders and gulls.
|Species||Season||Period||Population estimate||Quality of estimate||IBA Criteria||IUCN Category|
|Smew Mergellus albellus||breeding||1996||10-30 breeding pairs||medium||B2, C2||Least Concern|
|Wood Sandpiper Tringa glareola||breeding||1996||20-40 breeding pairs||poor||C6||Least Concern|
|Protected area||Designation||Area (ha)||Relationship with IBA||Overlap with IBA (ha)|
|Gammelstadsviken||Nature Reserve||440||is identical to site||440|
|Gammelstadsviken||Wetlands of International Importance (Ramsar)||430||is identical to site||430|
|IUCN habitat||Habitat detail||Extent (% of site)|
|Forest||Alluvial and very wet forest; Mixed woodland||10%|
|Wetlands (inland)||Fens, transition mires and springs; Rivers and streams; Standing freshwater; Water fringe vegetation||90%|
|Land-use||Extent (% of site)|
|nature conservation and research||100%|
Protection status National High International HighIBA overlaps with Nature Reserve (450 ha). 430 ha of IBA covered by Ramsar Site (Gammelstadsviken, 430 ha). IBA overlaps with Special Protection Area.
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Recommended citation BirdLife International (2015) Important Bird Areas factsheet: Lake Gammelstadsviken. Downloaded from http://www.birdlife.org on 23/05/2015
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