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Steppe-tundra composition and deglacial floristic turnover in interior Alaska revealed by sedimentary ancient DNA (sedaDNA)

15 June, 2024 by Alistair Monteath

When tracing vegetation dynamics over long timescales, obtaining enough floristic information to gain a detailed understanding of past communities and their transitions can be challenging. The first high-resolution sedimentary DNA…

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A New Model of Electron Pitch Angle Distributions and Loss Timescales in the Earth’s Radiation Belts

8 June, 2024 by Jack Atkinson, Johnathan Ross, Richard Horne, Sarah Glauert

As the number of satellites on orbit grows it is increasingly important to understand their operating environment. Physics-based models can simulate the behavior of the Earth's radiation belts by solving…

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A large-scale transcontinental river system crossed West Antarctica during the Eocene

5 June, 2024 by Claus-Dieter Hillenbrand, Robert Larter

Extensive ice coverage largely prevents investigations of Antarctica’s unglaciated past. Knowledge about environmental and tectonic development before large-scale glaciation, however, is important for understanding the transition into the modern icehouse…

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Coupled ice–ocean interactions during future retreat of West Antarctic ice streams in the Amundsen Sea sector

3 June, 2024 by Alexander Bradley, Rosie Williams, David Bett, Paul Holland, Robert Arthern

The Amundsen Sea sector has some of the fastest-thinning ice shelves in Antarctica, caused by high, ocean-driven basal melt rates, which can lead to increased ice streamflow, causing increased sea…

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A comparison of two statistical postprocessing methods for heavy‐precipitation forecasts over India during the summer monsoon

3 June, 2024 by Andrew Orr

Accurate ensemble forecasts of heavy precipitation in India are vital for many applications and essential for early warning of damaging flood events, especially during the monsoon season. In this study…

Read more on A comparison of two statistical postprocessing methods for heavy‐precipitation forecasts over India during the summer monsoon

Top predator feeding ecology and microplastic (MP) contamination on the far eastern South American coast: Evidence of MP trophic biotransfer

1 June, 2024 by Simon Morley

This study describes the feeding ecology, spatial distribution of each ontogenetic phase and the corresponding plastic debris contamination, in the Caribbean sharpnose shark, Rhizoprionodon porosus as a function of spatial-temporal…

Read more on Top predator feeding ecology and microplastic (MP) contamination on the far eastern South American coast: Evidence of MP trophic biotransfer

Pathogenic potential of an environmental Aspergillus fumigatus strain recovered from soil of Pygoscelis papua (Gentoo Penguins) colony in Antarctica

1 June, 2024 by Peter Convey

Aspergillus fumigatus is a common opportunistic pathogen in different animals, including birds such as penguins. For the first time, a fungal strain identified as A. fumigatus was isolated from soil…

Read more on Pathogenic potential of an environmental Aspergillus fumigatus strain recovered from soil of Pygoscelis papua (Gentoo Penguins) colony in Antarctica

Simultaneous organic aerosol source apportionment at two Antarctic sites reveals large-scale and eco-region specific components

29 May, 2024 by Anna Jones, Thomas Lachlan-Cope

Antarctica and the Southern Ocean are the most pristine areas of the globe and represent ideal places to investigate aerosol-climate interactions in an unperturbed atmosphere. In this study, we present…

Read more on Simultaneous organic aerosol source apportionment at two Antarctic sites reveals large-scale and eco-region specific components

Surface snow bromide and nitrate at Eureka, Canada in early spring and implications for polar boundary layer chemistry

23 May, 2024 by Xin Yang

This study explores the role of snowpack in polar boundary layer chemistry, especially as a direct source of reactive bromine (BrOx = BrO + Br) and nitrogen (NOx = NO + NO2) in the Arctic springtime. Surface snow…

Read more on Surface snow bromide and nitrate at Eureka, Canada in early spring and implications for polar boundary layer chemistry

Walruses from space: walrus counts in simultaneous remotely piloted aircraft system versus very high-resolution satellite imagery

21 May, 2024 by Hannah Cubaynes, Jaume Forcada, Peter Fretwell

Regular counts of walruses (Odobenus rosmarus) across their pan-Arctic range are necessary to determine accurate population trends and in turn understand how current rapid changes in their habitat, such as…

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

18 May, 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…

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Mercury Concentrations in Feathers of Albatrosses and Large Petrels at South Georgia: Contemporary Patterns and Comparisons with Past Decades

18 May, 2024 by Richard Phillips, William Mills

Mercury (Hg) is an environmental contaminant that can negatively impact the health of humans and wildlife. Albatrosses and large petrels show some of the highest levels of Hg contamination among…

Read more on Mercury Concentrations in Feathers of Albatrosses and Large Petrels at South Georgia: Contemporary Patterns and Comparisons with Past Decades

Overview, Progress and Next Steps for Our Understanding of the Near-Earth Space Radiation and Plasma Environment: Science and Applications

15 May, 2024 by Richard Horne, Sarah Glauert

The Near-Earth Space Radiation and Plasma Environment falls within the realm of G3 Cluster (G3 refers to ‘Near-Earth Radiation and Plasma Environment’ of the ‘Coupled Geospace System’) under the COSPAR…

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Using a common morphometric-based method to sex a migratory bird along its entire flyway despite geographical and temporal variations in body size and sexual size dimorphism

9 May, 2024 by Andrew Wood

Sexing bird species with monomorphic plumage is generally challenging, and sexual size dimorphism (SSD) is often used to develop morphometric-based sexing tools, e.g., using discriminant functions. Within species, local selection…

Read more on Using a common morphometric-based method to sex a migratory bird along its entire flyway despite geographical and temporal variations in body size and sexual size dimorphism

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

7 May, 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

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

6 May, 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

When ice and sea are not barriers for flies: First report of Trichocera maculipennis (Diptera) in South America

1 May, 2024 by Peter Convey

1. During the 2022/2023 austral winter, large swarms of Trichocera (Saltrichocera) maculipennis Meigen, 1818 (Diptera: Trichoceridae), were observed around house roofs in Puerto Williams (Navarino Island, southern Chile, 54° S). In…

Read more on When ice and sea are not barriers for flies: First report of Trichocera maculipennis (Diptera) in South America

Updating requirements for Endangered, Threatened and Protected species MSC Fisheries Standard v3.0 to operationalise best practices

1 May, 2024 by Richard Phillips

Bycatch in fisheries is a key threat to non-target marine species, particularly for those species that have life histories with low productivity or poor conservation status. In this paper, the…

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Adapting the Marine Stewardship Council risk-based framework to estimate impacts on seabirds, marine mammals, marine turtles and sea snakes

1 May, 2024 by Richard Phillips

Information available on impacts of fisheries on target or bycatch species varies greatly, requiring development of risk assessment tools to determine potentially unacceptable levels. Seabirds, marine mammals, marine turtles and…

Read more on Adapting the Marine Stewardship Council risk-based framework to estimate impacts on seabirds, marine mammals, marine turtles and sea snakes

Biogeographical and seasonal distribution of pteropod populations in the Western and Central Mediterranean Sea inferred from sediment traps

26 April, 2024 by Clara Manno

Pteropods are a group of cosmopolitan holoplanktic gastropods that produce an aragonite shell and play an important role in both marine ecosystems and geochemical cycles. In addition to being affected…

Read more on Biogeographical and seasonal distribution of pteropod populations in the Western and Central Mediterranean Sea inferred from sediment traps

Long‐Term Variability and Tendencies in Mesosphere and Lower Thermosphere Winds From Meteor Radar Observations Over Esrange (67.9°N, 21.1°E)

16 April, 2024 by Ramesh Karanam, Tracy Moffat-Griffin

Long-term variabilities of monthly zonal (U) and meridional winds (V) in northern polar mesosphere and lower thermosphere (MLT, ∼80–100 km) are investigated using meteor radar observations during 1999–2022 over Esrange…

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Unexpectedly uneven distribution of functional trade-offs explains cranial morphological diversity in carnivores

16 April, 2024 by Marie Attard

Functional trade-offs can affect patterns of morphological and ecological evolution as well as the magnitude of morphological changes through evolutionary time. Using morpho-functional landscape modelling on the cranium of 132…

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Intraguild predation in pinnipeds: Southern sea lions prey upon adult female South American fur seals in the Falkland Islands

1 April, 2024 by Kayleigh Jones

Intraguild predation, where a dominant predator kills and consumes a subordinate predator that is a potential competitor, is taxonomically and geographically widespread among mammalian carnivores (Palomares & Caro, 1999; Polis…

Read more on Intraguild predation in pinnipeds: Southern sea lions prey upon adult female South American fur seals in the Falkland Islands

Detection of plastic, cellulosic micro-fragments and microfibers in Laternula elliptica from King George Island (Maritime Antarctica)

1 April, 2024 by Simon Morley

It is generally acknowledged that microplastic pollutants are prevalent in ocean waters and sediments across a range of tropical, temperate, subpolar, and polar regions. The waters surrounding King George Island…

Read more on Detection of plastic, cellulosic micro-fragments and microfibers in Laternula elliptica from King George Island (Maritime Antarctica)

Testing the resilience, physiological plasticity and mechanisms underlying upper temperature limits of Antarctic marine ecto-therms

29 March, 2024 by Elaine Fitzcharles, Lloyd Peck, Melody Clark, Rebecca Smith, Rose Stainthorp, Simon Morley

Antarctic marine ectotherms live in the constant cold and are characterised by limited resilience to elevated temperature. Here we tested three of the central paradigms underlying this resilience. Firstly, we…

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