Номер документа:
WG-EMM-2025/21
Представлено (имя):
Dr Claire Waluda (Соединенное Королевство)
Утверждено (имя):
Dr Martin Collins (Соединенное Королевство)
Accessibility Categories
Request permission to release each time (RP)
Пункт(ы) повестки дня
Резюме
- We provide an overview of CCAMLR-related ecosystem monitoring and scientific activities undertaken by the British Antarctic Survey (BAS) between April 2024 and March 2025.
- During the winter, sea ice in Area 48 extended unusually far north, approaching South Georgia for the first time since the 1980s.
- The annual phytoplankton bloom at South Georgia was notably intense this year, with highest chlorophyll a concentration occurring in January 2025.
- Giant iceberg A-23A grounded for three months on the southwestern shelf of South Georgia from March 2025, shedding many smaller icebergs while there.
- The El Niño-Southern Oscillation index entered a negative phase, albeit with a smaller magnitude than the previous La Niña event.
- CEMP monitoring was undertaken at Bird Island (gentoo and macaroni penguins, Antarctic fur seals, Black browed albatross), King Edward Point (gentoo penguins, Antarctic fur seals), Signy Island (Adélie, chinstrap and gentoo penguins) and Goudier Island (gentoo penguins).
- A new outbreak of HPAI began in September 2024 near King Edward Point Research Station, primarily affecting Antarctic fur seals and elephant seals.
- The South Georgia Polar Ocean Ecosystems Time Series (POETS) Western Core Box (WCB) survey was carried out during February 2025 and Eastern Core Box (ECB) surveys were completed in May, July, September and December 2024, and January and March 2025. The surveys included measurements of krill acoustics, net sampling and marine mammal observations.
- The South Georgia Groundfish survey took place on board the FV Sil in January and February 2025 with dispersed catches of mackerel icefish, Champsocephalus gunnari generating a biomass estimate of 64,906 tonnes. Catches and biomass estimates of Pseudochaenichtys georgianus and Chaenocephalus aceratus were higher than any previous survey.
- Research was undertaken in the Scotia and Weddell Seas onboard the RRS Sir David Attenborough during February and March 2025. The expedition measured ocean circulation, the tracing of nutrient sources and the control of carbon flux by ecosystems processes and undertook sampling in the vicinity of the A-23A iceberg.
- Surveys of beached marine debris found a below average number of items recovered from Bird Island and Signy Island, and slightly above average levels at Goudier Island. Sixteen entangled Antarctic fur seals were recorded at South Georgia (eight at Bird Island, eight at King Edward Point), of which ten were removed successfully. There were observations of two entangled wandering albatrosses (a chick and parent) at Bird Island, and the first record of an entanglement at Goudier Island (a gentoo penguin with a rope around its foot). All three entanglements were removed successfully