Atlantic, Southwest 21 - Marine

Year of compilation: 2012

Site description (baseline)
This Marine IBA is identified using tracking data. It falls within the Argentina Exclusive Economic Zone (EEZ) and the Atlantic, Southwest FAO ocean region. The site covers an area of 12120 km2 and is 299 km away from the closet coastline. The depth ranges from 97 to 1504 m, with a mean annual wind speed of 2.22 m/s, mean annual sea surface temperature falls between 8.27 and 11.14 °C and mean annual chlorophyll-a concentrations found to range between 0.55 and 1.91 mg/m3.

Key biodiversity
2 species trigger IBA criteria at this Marine IBA. BirdLife analyses of tracking data estimates that 1534-1342 individuals of Wandering Albatross (VU) from South Georgia are present at the site during the Sabbatical (Oct-May) life-history stage. 2500000-900000 individuals of Great Shearwater (LC) from Tristan da Cunha Islands are present at the site during the Non-breeding (Jan-Mar) life-history stage.

Recommended citation
BirdLife International (2023) Important Bird Area factsheet: Atlantic, Southwest 21 - Marine. Downloaded from on 30/05/2023.