Atlantic, Antarctic 21 - Marine


Country/territory: High Seas

IBA Criteria met: -
For more information about IBA criteria please click here

Area: 6,117,057 ha

Protection status:


Site description
This Marine IBA is identified using tracking data. It falls within High Seas International Waters and the Atlantic, Antarctic FAO ocean region. The site covers an area of 61171 km2 and is 294 km away from the closet coastline. The depth ranges from 1931 to 5237 m, with a mean annual wind speed of 2.99 m/s, mean annual sea surface temperature falls between 0.85 and 3.89 °C and mean annual chlorophyll-a concentrations found to range between 0.34 and 1.41 mg/m3.

Key biodiversity
11 species trigger IBA criteria at this Marine IBA. BirdLife analyses of tracking data estimates that 559-1534 individuals of Wandering Albatross (VU) from South Georgia are present at the site during the Sabbatical (Nov-Feb), Juvenile (Nov-Sep) and Immature (Dec-Mar) life-history stages. 2250-9318 individuals of Southern Giant-petrel (LC) from South Georgia are present at the site during the Brood-guard (Jan-Feb), Incubation (Nov-Jan) and Non-breeding (Nov-Sep) life-history stages. 3103-6369 individuals of Northern Giant-petrel (LC) from are present at the site during the Incubation (Oct-Dec) life-history stage. 1552-7758 individuals of Northern Giant-petrel (LC) from South Georgia are present at the site during the Brood-guard (Dec-Feb), Non-breeding (Nov-Sep) and Post-guard (Jan-Apr) life-history stages. 31205-62410 individuals of Grey-headed Albatross (VU) from South Georgia are present at the site during the Non-breeding (Oct-Jun) life-history stage.


Recommended citation
BirdLife International (2020) Important Bird Areas factsheet: Atlantic, Antarctic 21 - Marine. Downloaded from http://www.birdlife.org on 14/08/2020.