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Seasonal variation in the stomach microbiota of two sympatrically breeding Pygoscelis penguin species at Signy Island, South Orkney Islands

26 September, 2024 by David Pearce, Michael Dunn, Peter Convey, Stacey Adlard

The gut microbiomes of Antarctic penguins are important for the fitness of the host birds and their chicks. The compositions of microbial communities in Antarctic penguin guts are strongly associated…

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Chlorophyll Production in the Amundsen Sea Boosts Heat Flux to Atmosphere and Weakens Heat Flux to Ice Shelves

17 September, 2024 by Dani Jones, Paul Holland

The Amundsen Sea in West Antarctica features rapidly thinning ice shelves, large polynyas, and sizable spring phytoplankton blooms. Although considerable effort has gone into characterizing heat fluxes between the Amundsen…

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Coincident Lake Drainage and Grounding Line Retreat at Engelhardt Subglacial Lake, West Antarctica

14 September, 2024 by Bryony Freer, Oliver Marsh

Antarctica has an active subglacial hydrological system, with interconnected subglacial lakes fed by subglacial meltwater. Subglacial hydrology can influence basal sliding, inject freshwater into the sub-ice-shelf cavity, and impact sediment…

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Population genetics of the deep-sea acorn barnacle Bathylasma hirsutum (Hoek, 1883) and the first report of its affiliation with a hydrothermal vent field

4 September, 2024 by Katrin Linse

Confined by the Mid-Atlantic Ridge and the European continental shelf, the deep-sea acorn barnacle Bathylasma hirsutum (Hoek, 1883) lives in the northeast Atlantic deep sea where it has been frequently…

Read more on Population genetics of the deep-sea acorn barnacle Bathylasma hirsutum (Hoek, 1883) and the first report of its affiliation with a hydrothermal vent field

Detection and spread of high pathogenicity avian influenza virus H5N1 in the Antarctic Region

3 September, 2024 by Ashley Bennison, Elaine Fitzcharles, Freya Blockley, Marcia Blyth, Rosamund Hall

Until recent events, the Antarctic was the only major geographical region in which high pathogenicity avian influenza virus (HPAIV) had never previously been detected. Here we report on the detection…

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A comparative study of tissue protein synthesis rates in an Antarctic, Harpagifer antarcticus and a temperate, Lipophrys pholis teleost

1 September, 2024 by Andrew Clarke, Lloyd Peck, Melody Clark

The affect of temperature on tissue protein synthesis rates has been reported in temperate and tropical, but not Antarctic fishes. Previous studies have generally demonstrated low growth rates in Antarctic…

Read more on A comparative study of tissue protein synthesis rates in an Antarctic, Harpagifer antarcticus and a temperate, Lipophrys pholis teleost

LIGHT-bgcArgo-1.0: using synthetic float capabilities in E3SMv2 to assess spatiotemporal variability in ocean physics and biogeochemistry

30 August, 2024 by Yohei Takano

Since their advent over 2 decades ago, autonomous Argo floats have revolutionized the field of oceanography, and, more recently, the addition of biogeochemical and biological sensors to these floats has…

Read more on LIGHT-bgcArgo-1.0: using synthetic float capabilities in E3SMv2 to assess spatiotemporal variability in ocean physics and biogeochemistry

TIMED Doppler Interferometer Measurements of Neutral Winds at the Mesosphere and Lower Thermosphere and Comparison to Meteor Radar Winds [in review]

30 August, 2024 by Tracy Moffat-Griffin

The mesosphere and lower thermosphere (MLT) is a highly variable region that forms the transition region between middle and upper atmosphere. The variability of this region is driven by atmospheric…

Read more on TIMED Doppler Interferometer Measurements of Neutral Winds at the Mesosphere and Lower Thermosphere and Comparison to Meteor Radar Winds [in review]

Biocontrol mechanisms of the Antarctic yeast Debaryomyces hansenii UFT8244 against post-harvest phytopathogenic fungi of strawberries

26 August, 2024 by Peter Convey

The use of yeasts has been explored as an efficient alternative to fungicide application in the treatment and prevention of post-harvest fruit deterioration. Here, we evaluated the biocontrol abilities of…

Read more on Biocontrol mechanisms of the Antarctic yeast Debaryomyces hansenii UFT8244 against post-harvest phytopathogenic fungi of strawberries

Seafloor geomorphology of the Wrigley Gulf shelf, Amundsen Sea, West Antarctica, reveals two different phases of glaciation

19 August, 2024 by Claus-Dieter Hillenbrand

Knowledge of the behaviour of marine-based ice sheets during times of climatic warming, such as the last deglaciation, provides important information to understand how ice sheets respond to external forcing.…

Read more on Seafloor geomorphology of the Wrigley Gulf shelf, Amundsen Sea, West Antarctica, reveals two different phases of glaciation

The diverse and widespread Southern Ocean ophiuroid Amphiura belgicae should be considered a species complex

19 August, 2024 by Chester Sands, Peter Convey

Accurate knowledge of geographic ranges of species is essential for effective conservation management. Species with large distributions and good connectivity are presumed to be resilient to adverse localised/regional conditions, whereas…

Read more on The diverse and widespread Southern Ocean ophiuroid Amphiura belgicae should be considered a species complex

Wind Forcing Controls on Antarctic Bottom Water Export from the Weddell Sea via Bottom Boundary Layer Processes

6 August, 2024 by Christopher Auckland, Povl Abrahamsen, Michael Meredith

The Antarctic Bottom Water (AABW) exported from the Weddell Sea has experienced warming and contraction in the past 30 yrs. Superposed on this decadal trend is substantial annual and interannual…

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Runs of homozygosity reveal contrasting histories of inbreeding across global lineages of the edible porcini mushroom, Boletus edulis

5 August, 2024

Inbreeding, the mating of individuals that are related through common ancestry, is of central importance in evolutionary and conservation biology due to its impacts on individual fitness and population dynamics.…

Read more on Runs of homozygosity reveal contrasting histories of inbreeding across global lineages of the edible porcini mushroom, Boletus edulis

Historical Southern Hemisphere biomass burning variability inferred from ice core carbon monoxide records

5 August, 2024 by Diana Vladimirova, Dieter Tetzner, Ivo Strawson, Jack Humby, Liz Thomas, Thomas Bauska

Biomass burning plays an important role in climate-forcing and atmospheric chemistry. The drivers of fire activity over the past two centuries, however, are hotly debated and fueled by poor constraints…

Read more on Historical Southern Hemisphere biomass burning variability inferred from ice core carbon monoxide records

Environmental DNA reveals fine‐scale spatial and temporal variation of marine mammals and their prey species in a Scottish marine protected area

22 July, 2024 by Elizabeth Boyse

Marine mammal foraging grounds are popular focal points for marine protected area (MPA) implementation, despite being temporally dynamic, requiring continuous monitoring to infer prey availability and abundance. Marine mammal distributions…

Read more on Environmental DNA reveals fine‐scale spatial and temporal variation of marine mammals and their prey species in a Scottish marine protected area

Comparative phylogeography, a tool to increase assessment efficiency of polar assemblage resilience and vulnerability

17 July, 2024 by Chester Sands, Peter Convey

The Southern Ocean benthos is remarkably rich and diverse, and managed under a complexity of treaties and conventions, further complicated by geopolitical boundaries. Traditionally, conservation management is largely informed by…

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When glaciers calve: Large underwater tsunamis discovered at edge of Antarctica, likely affecting ice melt, climate and marine ecosystem

14 July, 2024 by Michael Meredith

The mixing of water in the ocean is a key influence on our climate and ecosystems, but its importance is often under-recognized. Mixing in the seas around Antarctica—a key process…

Read more on When glaciers calve: Large underwater tsunamis discovered at edge of Antarctica, likely affecting ice melt, climate and marine ecosystem

Ancient diversification in extreme environments: Exploring the historical biogeography of the Antarctic winged midge Parochlus steinenii (Diptera: Chironomidae)

11 July, 2024 by Chester Sands, Felipe Simoes, Peter Convey

The terrestrial fauna of Antarctica consists of a limited number of species, notably insects, small crustaceans and other micro-invertebrates. Over long periods of evolutionary isolation, these organisms have developed varying…

Read more on Ancient diversification in extreme environments: Exploring the historical biogeography of the Antarctic winged midge Parochlus steinenii (Diptera: Chironomidae)

Improved Energy Resolution Measurements of Electron Precipitation Observed During an IPDP‐Type EMIC Event

9 July, 2024 by Aaron Hendry, Alexander Lozinski, Mark Clilverd

High energy resolution DEMETER satellite observations from the Instrument for the Detection of Particle (IDP) are analyzed during an electromagnetic ion cyclotron (EMIC)-induced electron precipitation event. Analysis of an Interval…

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Fungal and fungal-like diversity present in ornithogenically influenced maritime Antarctic soils assessed using metabarcoding

2 July, 2024 by Peter Convey

We assessed soil fungal and fungal-like diversity using metabarcoding in ornithogenically influenced soils around nests of the bird species Phalacrocorax atriceps, Macronectes giganteus, Pygoscelis antarcticus, and Pygoscelis adelie on the…

Read more on Fungal and fungal-like diversity present in ornithogenically influenced maritime Antarctic soils assessed using metabarcoding

Network analyses on photographic surveys reveal that invertebrate predators do not structure epibenthos in the deep (~2000m) rocky Powell Basin, Weddell Sea, Antarctica

2 July, 2024 by Huw Griffiths, Rowan Whittle, Tasnuva Khan

Predator-prey interactions in marine ecosystems control population sizes, maintain species richness, and provide intermediate disturbance. Such ecosystem structuring interactions may be rare in Antarctic epibenthic communities, which are unique among…

Read more on Network analyses on photographic surveys reveal that invertebrate predators do not structure epibenthos in the deep (~2000m) rocky Powell Basin, Weddell Sea, Antarctica

At‑sea distribution of marine predators around South Georgia during austral winter, with implications for fisheries management

1 July, 2024 by Alastair Wilson, Claire Waluda, Kate Owen, Martin Collins, Meghan Goggins, Philip Hollyman, Philip Trathan

The sub-Antarctic island of South Georgia is surrounded by highly productive waters, supporting dense aggregations of Antarctic krill (Euphausia superba), a vital food source for globally important seabird and marine…

Read more on At‑sea distribution of marine predators around South Georgia during austral winter, with implications for fisheries management

Ocean warming and acidification adjust inter- and intra-specific variability in the functional trait expression of polar invertebrates

1 July, 2024 by Lloyd Peck

Climate change is known to affect the distribution and composition of species, but concomitant alterations to functionally important aspects of behaviour and species-environment relations are poorly constrained. Here, we examine…

Read more on Ocean warming and acidification adjust inter- and intra-specific variability in the functional trait expression of polar invertebrates

The Impact of CO2 and Climate State on Whether Dansgaard–Oeschger Type Oscillations Occur in Climate Models

29 June, 2024 by Irene Malmierca Vallet, John Slattery, Louise Sime

Greenland ice core records feature Dansgaard–Oeschger (D-O) events, which are abrupt warming episodes followed by gradual cooling during ice age climate. The three climate models used in this study (CCSM4,…

Read more on The Impact of CO2 and Climate State on Whether Dansgaard–Oeschger Type Oscillations Occur in Climate Models

Enzymes and biosurfactants of industrial interest produced by culturable fungi present in sediments of Boeckella Lake, Hope Bay, north‑east Antarctic Peninsula

22 June, 2024 by Peter Convey

This study characterized cultivable fungi present in sediments obtained from Boeckella Lake, Hope Bay, in the north-east of the Antarctic Peninsula, and evaluated their production of enzymes and biosurfactants of…

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The importance of cloud properties when assessing surface melting in an offline-coupled firn model over Ross Ice shelf, West Antarctica

21 June, 2024 by Andrew Orr, Ella Gilbert, Ruth Price, Thomas Bracegirdle, Tony Phillips

The Ross Ice Shelf, West Antarctica, experienced an extensive melt event in January 2016. We examine the representation of this event by the HIRHAM5 and MetUM high-resolution regional atmospheric models,…

Read more on The importance of cloud properties when assessing surface melting in an offline-coupled firn model over Ross Ice shelf, West Antarctica