Druzno lake (923)
Poland, Europe
Site overview
KBA status: confirmed
Year of last assessment: 2010
National site name: Jezioro Druzno
Central coordinates: Latitude: 54.0667, Longitude: 19.4500
System: freshwater, terrestrial
Elevation (m): 2 to 10
Area of KBA (km2): 60.03966
Protected area coverage (%): 99.37
KBA classification: Regional
Legacy site: Yes
Site details
Site description: A shallow, nutrient-rich lake (up to 1.5 m deep) surrounded by extensive mires and swamp-forest. There is a significant daily fluctuation in water-level, caused by wind-related water-level fluctuation in the Wiœlany lagoon, which connects with this site via the Elbl¹g river. There is a rich vegetation of floating (Nymphaea) and submerged (Potamogeton) plants, as well as extensive reedbeds Phragmites. Alder Alnus carr occurs along marshy shores.
Rationale for qualifying as KBA: This site qualifies as a Key Biodiversity Area of international significance that was identified using previously established criteria and thresholds for the identification of Important Bird and Biodiversity Areas (IBAs) and for which available data indicate that it does not meet global KBA criteria and thresholds set out in the Global Standard.
Additional biodiversity: The site regularly supports 20,000 or more waterbirds during spring and autumn migration, mainly wildfowl Anser/Anas. Breeding species of global conservation concern that do not meet IBA criteria: Aythya nyroca (2-3 pairs), Crex crex (2-3 pairs).
Habitats
Land use: agriculture (80%) | fisheries/aquaculture (10%) | hunting | tourism/recreation (10%)
| IUCN Habitat | Coverage % | Habitat detail |
|---|---|---|
| Wetlands(Inland) | 74 | |
| Artificial - Terrestrial | 3 | |
| Forest | 19 | |
| Grassland | 4 |
Threats
Summary of threats to biodiversity at KBA: Nutrient pollution by agriculture, industry and domestic sewage poses a threat. Hunting in the nature reserve is intense.