Torishima island - Marine (30659)
Japan, Asia
Site overview
KBA status: confirmed
Year of last assessment: 2016
National site name: Torishima island - Marine
Central coordinates: Latitude: 30.4835, Longitude: 140.2885
System: marine
Area of KBA (km2): 196.51057
Protected area coverage (%): 0.05
KBA classification: Global
Legacy site: Yes
Site details
Site description: This Marine IBA is identified using both tracking data and seaward extensions around breeding colonies. It falls within the Japan Exclusive Economic Zone (EEZ) and the Pacific, Northwest FAO ocean region. The site covers an area of 197 km2 and is 480 km away from the closet coastline. The depth ranges from 0 to 1044 m, mean annual sea surface temperature falls between 23.11 and 23.17 °C and mean annual chlorophyll-a concentrations found to range between 0.15 and 0.17 mg/m3.
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: 2 species trigger IBA criteria at this Marine IBA. BirdLife analyses of tracking data estimates that 92-780 individuals of Short-tailed Albatross (VU) from Izu Shoto are present at the site during the Post-guard (Feb-Jun) life-history stage. Seaward extensions around breeding colony; Torishima island include key near-colony areas for breeding populations of Japanese Murrelet (VU).
Delineation rationale: Site identified by applying a colony extension to SitRecId - 15044 , and by analysis of tracking dataset(s) - sta_izs_pg
Habitats
| IUCN Habitat | Coverage % | Habitat detail |
|---|---|---|
| Marine Neritic | 100 |