Kyu-Osatsunuma (15021)
Japan, Asia
Site overview
KBA status: confirmed
Year of last assessment: 2011
National site name: Kyu-Osatsunuma
Central coordinates: Latitude: 42.9000, Longitude: 141.6833
System: freshwater, terrestrial
Elevation (m): 0 to 5
Area of KBA (km2): 1.25151
KBA classification: Regional
Legacy site: Yes
Site details
Site description: Kyuosatunuma is a farm drainage that is 2 km long and 130 m wide, located at the border of Chitose City and Naganuma Town, and flows into the Chitosegawa river. The whole area was the vast swampland before, with the name of Osatsunuma. But the drainage works have formed the present appearance. The water is shallow and Zizania latifolis and Trapa japonica are distributed. At the southwest side there is a 30ha grassland, mostly of Phragmites australis and Solidago virgaurea var. asiatica. It is surrounded by Salix (myrtilloides), Sambucus racemosa ssp. and windbreak forests of Betula platyphylla var. japonica and Fraxinus mandshurica. Surrounding farms rotate crops of wheat, beans, sugar beet and other vegetables.
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.
Habitats
| IUCN Habitat | Coverage % | Habitat detail |
|---|---|---|
| Artificial - Terrestrial | 50 | |
| Wetlands(Inland) | 50 |
Threats
| Threat level 1 | Threat level 2 | Threat level 3 | Timing |
|---|---|---|---|
| Biological resource use | Hunting & collecting terrestrial animals | Persecution/control | Ongoing |
| Biological resource use | Hunting & collecting terrestrial animals | Intentional use (species being assessed is the target) | Only in the past and unlikely to return |
| Geological events | Volcanoes | Only in the past and unlikely to return | |
| Pollution | Garbage & solid waste | Ongoing |