Runa Antony

Evaluation of extraction solvents for untargeted metabolomics in characterizing Antarctic cryoconite hole dissolved organic matter

Swapnil Mundhe, Saborni Maiti, Aritri Sanyal, Anirban Majumder et autres

BACKGROUND: Cryoconite holes, a dynamic habitat in Antarctica and other glaciers, are glacial biological hotspots with high biogeochemical turnover rates, significantly influencing carbon and nitrogen cycling within climate-sensitive glacial ecosystems. They are found on glaciers worldwide, highlighting their global importance, and are …

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Spatial and seasonal variability of nutrient export from a subarctic glacial river to the ocean

Marco Ajmar, Jeffrey P. H. Perez, Helen K. Feord, Anne Eberle et autres

Glacial rivers play an important role in transporting dissolved and particulate nutrients from glaciers to downstream ecosystems where they influence ocean primary productivity. Abiotic and biotic processes in glacial environments enrich meltwaters with various nutrients. These may undergo changes in concentration and …

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Author Correction: Dynamics of organic matter in algal blooms on the Greenland ice sheet

Pamela E. Rossel, Runa Antony, Rey Mourot, Thorsten Dittmar et autres

This study is funded by the European Research Council (ERC) Synergy Grant DEEP PURPLE under the European Union’s Horizon 2020 research and innovation programme (Grant agreement No 856416). Open Access funding enabled and organized by Projekt DEAL.

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Stromatolitic Mounds in Tidal‐Facies Sandstones of the Paleoarchean Moodies Group (Barberton Greenstone Belt, Eswatini)

Stanley P. Reimann, Martin Homann, D.J. Janse van Rensburg, Michael Wiedenbeck et autres

ABSTRACT Shallow‐marine environments are thought to have been pivotal to the spreading, perhaps even the origin, of early life on Earth. The shallow‐marine Archean sedimentary record of early life, however, is biased towards carbonates; nearshore siliciclastic environments have not received proportional attention. …

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Organic matter variability in algal dominated habitats on the Western Greenland Ice Sheet

Pamela E. Rossel, Runa Antony, Rey Mourot, Thorsten Dittmar et autres

Microbiological activity on glacier and ice sheet surfaces can be a major factor responsible for their darkening. Among microbes, pigmented snow- and glacial ice-algae increase light absorption, further accelerating melting and supporting the development of pigmented algal blooms on the Greenland Ice …

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Dynamics of organic matter in algal blooms on the Greenland ice sheet

Pamela E. Rossel, Runa Antony, Rey Mourot, Thorsten Dittmar et autres

Surface melting supports the development of pigmented algal blooms on the Greenland Ice Sheet, decreasing albedo and further accelerating melting. The interplay between carbon-fixing algae and carbon-respiring heterotrophic microorganisms ultimately controls the amount and composition of organic matter (OM) and thus the …

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Extraction Strategies for Profiling the Molecular Composition of Particulate Organic Matter on Glacier Surfaces

Runa Antony, Pamela E. Rossel, Helen K. Feord, Thorsten Dittmar et autres

Pigmented microalgae thrive on supraglacial surfaces, producing "sticky" extracellular polymeric substances that combine into a mineral-organic matrix. Together, they enhance snow and ice melting by lowering the albedo. Understanding the chemical nature of particulate organic matter (POM) in this matrix is crucial …

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Molecular-level characterization of supraglacial dissolved and water-extractable organic matter along a hydrological flow path in a Greenland Ice Sheet micro-catchment

Eva L. Doting, Ian T. Stevens, Anne M. Kellerman, Pamela E. Rossel et autres

Sunlight penetrates the bare-ice surface of glaciers and ice sheets, giving rise to the presence of a three-dimensional porous matrix of partially melted ice crystals known as the weathering crust. Surface meltwater slowly percolates through this weathering crust, which hosts active and …

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Iron-rich peatlands as hotspots of organic carbon export to polar aquatic ecosystems

Jeffrey Paulo H. Perez, Christoph Keuschnig, Christopher B. Trivedi, Zhengzheng Chen et autres

Organic carbon dynamics in pigmented algal blooms on the Greenland Ice Sheet surface

Liane G. Benning, Pamela E. Rossel, Runa Antony, Rey Mourot et autres

Autotrophy to Heterotrophy: Shift in Bacterial Functions During the Melt Season in Antarctic Cryoconite Holes

A. Sanyal, Runa Antony, Gautami Samui, Meloth Thamban

Microbes residing in cryoconite holes (debris, water, and nutrient-rich ecosystems) on the glacier surface actively participate in carbon and nutrient cycling. Not much is known about how these communities and their functions change during the summer melt-season when intense ablation and runoff …

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Holed up, but thriving: Impact of multitrophic cryoconite communities on glacier elemental cycles

Runa Antony, Dattatray Mongad, Aritri Sanyal, Dhiraj Prakash Dhotre et autres

Cryoconite holes (water and sediment-filled depressions), found on glacier surfaces worldwide, serve as reservoirs of microbes, carbon, trace elements, and nutrients, transferring these components downstream via glacier hydrological networks. Through targeted amplicon sequencing of carbon and nitrogen cycling genes, coupled with functional …

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