Nysa reservoir (936)
Poland, Europe
Site overview
KBA status: confirmed
Global KBA criteria: D1a
Year of last assessment: 2010
National site name: Zbiornik Nyski
Central coordinates: Latitude: 50.4500, Longitude: 17.2500
System: freshwater, terrestrial
Elevation (m): 200 to 200
Area of KBA (km2): 20.97237
Protected area coverage (%): 100.00
KBA classification: Global
Legacy site: Yes
Site details
Site description: A large storage reservoir on the Nysa K³odzka river, in a hilly agricultural landscape, near Otmuchów reservoir. At the western end there are artificial islands created as a result of gravel exploitation. Southern and western shores are partly overgrown with willow Salix scrub with sparse water-fringe vegetation. Two river mouths (the Widna and the Bia³a G³uchowska) are important for birds. Land-uses include gravel exploitation.
Rationale for qualifying as KBA: This site qualifies as a Key Biodiversity Area of international significance that meets the thresholds for at least one criterion described in the Global Standard for the Identification of KBAs.
Additional biodiversity: Up to 60,000 ducks, geese, gulls and waders occur on migration and in winter.
Habitats
Land use: tourism/recreation (10%) | water management (90%)
| IUCN Habitat | Coverage % | Habitat detail |
|---|---|---|
| Wetlands(Inland) | 100 |
Threats
Summary of threats to biodiversity at KBA: Rapid filling of the reservoir (during river floods) reduces or eliminates suitable foraging/resting habitat for staging waders on migration.
| Threat level 1 | Threat level 2 | Threat level 3 | Timing |
|---|---|---|---|
| Natural system modifications | Fire & fire suppression | Increase in fire frequency/intensity | Ongoing |
| Natural system modifications | Dams & water management/use | Dams (size unknown) | Ongoing |
| Biological resource use | Hunting & collecting terrestrial animals | Intentional use (species being assessed is the target) | Ongoing |
| Pollution | Excess energy | Noise pollution | Ongoing |
| Invasive & other problematic species, genes & diseases | Invasive non-native/alien species/diseases | Unspecified species | Ongoing |
| Pollution | Domestic & urban waste water | Type Unknown/Unrecorded | Ongoing |
| Residential & commercial development | Tourism & recreation areas | Ongoing | |
| Human intrusions & disturbance | Recreational activities | Ongoing |