scholarly journals Diet of a specialist in a changing environment: the crabeater seal along the western Antarctic Peninsula

2012 ◽  
Vol 455 ◽  
pp. 287-301 ◽  
Author(s):  
LA Hückstädt ◽  
JM Burns ◽  
PL Koch ◽  
BI McDonald ◽  
DE Crocker ◽  
...  
Keyword(s):  
Antarctic Peninsula ◽  
Western Antarctic Peninsula ◽  
Changing Environment ◽  
Crabeater Seal

Aerosol Marine Primary Carbohydrates and Atmospheric Transformation in the Western Antarctic Peninsula

2021 ◽  
Author(s):  
Sebastian Zeppenfeld ◽  
Manuela van Pinxteren ◽  
Dominik van Pinxteren ◽  
Heike Wex ◽  
Elisa Berdalet ◽  
...  
Keyword(s):  
Antarctic Peninsula ◽  
Western Antarctic Peninsula

scholarly journals Correction to: Summer phyto‑ and bacterioplankton communities during low and high productivity scenarios in the Western Antarctic Peninsula

Polar Biology ◽  
2021 ◽  
Author(s):  
Sebastián Fuentes ◽  
José Ignacio Arroyo ◽  
Susana Rodriguez‑Marconi ◽  
Italo Masotti ◽  
Tomás Alarcon‑Schumacher ◽  
...  
Keyword(s):  
Antarctic Peninsula ◽  
Western Antarctic Peninsula ◽  
High Productivity ◽  
Bacterioplankton Communities

Phytoplankton in the embayments of King George Island (Antarctic Peninsula): a review with emphasis on diatoms

Polar Record ◽  
2018 ◽  
Vol 54 (2) ◽  
pp. 158-175 ◽  
Author(s):  
Priscila Kienteca Lange ◽  
Ryszard Ligowski ◽  
Denise Rivera Tenenbaum
Keyword(s):  
Antarctic Peninsula ◽  
Early Summer ◽  
Western Antarctic Peninsula ◽  
King George Island ◽  
Accurate Identification ◽  
Phytoplankton Assemblages ◽  
Marine Food Web ◽  
Planktonic Diatoms ◽  
Local Material ◽  
Marine Food

ABSTRACTConsidering that phytoplankton assemblages are good bioindicators of environmental conditions, the sensitivity of the Western Antarctic Peninsula (WAP) to climate change, and the importance of some areas of its islands as Antarctic Specially Managed Areas, this work assembles published datasets on phytoplankton biodiversity and ecology in confined coastal areas (embayments) of King George Island, WAP. Over 33 years (1980–2013), 415 species from 122 genera have been identified to species level, being mostly diatoms (371 species), with 10 new species described with local material (6 diatoms, 4 cyanobacteria). The importance of diatoms was indicated by the frequent occurrence of Corethron pennatum, Pseudogomphonema kamtshaticum, and abundant benthic genera in the plankton (e.g. Navicula, Cocconeis). The increased contribution of dinoflagellates after 2010 suggests marked changes in the water column. Early-summer blooms differ between the bays' eastern and western shores, with terrestrial melting and wind-driven upwelling inducing the dominance of benthic species at eastern shores, whereas planktonic diatoms (Thalassiosira, Pseudo-nizschia, and Chaetoceros) are most abundant along western shores and central areas. The importance of an accurate identification of organisms that are becoming key ecological components of the region is discussed, as recent changes in the microflora may affect the entire marine food web.

scholarly journals Climate drives long-term change in Antarctic Silverfish along the western Antarctic Peninsula

2021 ◽  
Author(s):  
Andrew Corso ◽  
Deborah Steinberg ◽  
Sharon Stammerjohn ◽  
Eric Hilton
Keyword(s):  
Sea Ice ◽  
Surface Temperature ◽  
Sea Surface Temperature ◽  
Antarctic Peninsula ◽  
Environmental Variability ◽  
Sea Surface ◽  
Larval Abundance ◽  
Western Antarctic Peninsula ◽  
Amundsen Sea ◽  
Antarctic Silverfish

Abstract Over the last half of the 20th century, the western Antarctic Peninsula has been one of the most rapidly warming regions on Earth, leading to substantial reductions in regional sea ice coverage. These changes are modulated by atmospheric forcing, including the Amundsen Sea Low (ASL) pressure system. We utilized a novel 25-year (1993–2017) time series to model the effects of environmental variability on larvae of a keystone species, the Antarctic Silverfish (Pleuragramma antarctica). Antarctic Silverfish use sea ice as spawning habitat and are important prey for penguins and other predators. We show that warmer sea surface temperature and decreased sea ice negatively impact larval abundance. Modulating both sea surface temperature and sea ice is ASL variability, where a strong ASL is associated with reduced larvae. These findings support a narrow sea ice and temperature tolerance for adult and larval fish. Further regional warming predicted to occur during the 21st century could displace fish populations, altering this pelagic ecosystem.

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