Explanipedia

The influence of plantation forest legacy on blanket bog hydrology Open

Muhammad Jehanzaib, Raymond Flynn, Vicky Preece, Hannah Lehnhart-Barnett, Devin F. Smith , et al. · 2025

Irish surface water response to the 2018 drought Open

Devin F. Smith, W. Berry Lyons, Tiernan Henry, Raymond Flynn, Anne E. Carey · 2023

Intense weather events are projected to increase as a consequence of climate change. The summer 2018 drought in Europe impacted human health, ecosystems, and economic prosperity. Even locations with an abundance of fresh water, like Irelan…

Nutrient concentrations and nitrogen speciation in tropical watersheds of central Panama Open

Ozeas Costa, W. Berry Lyons, Russell S. Harmon, Anne E. Carey, Susan A. Welch , et al. · 2023

We present chemical analyses from rivers and streams in five partly to near-fully forested watersheds in the humid tropics of central Panama. Contrary to the situation observed for temperate watersheds in the Northern Hemisphere, the conce…

Change at 85 degrees south: Shackleton Glacier region proglacial lakes from 1960 to 2020 Open

Melisa A. Diaz, Christopher B. Gardner, David H. Elliot, Byron J. Adams, W. Berry Lyons · 2023

Over the last two decades, anomalous warming events have been observed in coastal Antarctic regions. While these events have been documented in the Ross Sea sector, the Antarctic interior is believed to have been buffered from warming. In …

Grand Challenges in environmental geochemistry Open

W. Berry Lyons · 2023

SPECIALTY GRAND CHALLENGE article Front. Geochem., 05 April 2023Sec. Environmental Geochemistry Volume 1 - 2023 | https://doi.org/10.3389/fgeoc.2023.1154473

Strong Dispersal Limitation of Microbial Communities at Shackleton Glacier, Antarctica Open

Nathan P. Lemoine, Byron J. Adams, Melisa A. Diaz, Nicholas B. Dragone, André L.C. Franco , et al. · 2023

Because of their diversity and ubiquity, microbes provide an excellent means to tease apart how natural communities are structured. In general, ecologists believe that stochastic assembly processes, like random drift and dispersal, should …

Biogeochemical and historical drivers of microbial community composition and structure in sediments from Mercer Subglacial Lake, West Antarctica Open

Christina Davis, Ryan A. Venturelli, Alexander B. Michaud, Jon Hawkings, Amanda M. Achberger , et al. · 2023

Ice streams that flow into Ross Ice Shelf are underlain by water-saturated sediments, a dynamic hydrological system, and subglacial lakes that intermittently discharge water downstream across grounding zones of West Antarctic Ice Sheet (WA…

Isotopic signature of massive, buried ice in eastern Taylor Valley, Antarctica: Implications for its origin Open

Christopher B. Gardner, Melisa A. Diaz, Devin F. Smith, Andrew G. Fountain, J. S. Levy , et al. · 2022

The coastal regions of the McMurdo Dry Valleys, Antarctica, contain deposits of the Ross Sea Drift, sedimentary material left from the Ross Sea ice sheet from the advance of the West Antarctic ice sheet during the Last Glacial Maximum. Muc…

Elevational Constraints on the Composition and Genomic Attributes of Microbial Communities in Antarctic Soils Open

Nicholas B. Dragone, Jessica B. Henley, Hannah Holland‐Moritz, Melisa A. Diaz, Ian D. Hogg , et al. · 2022

Antarctic soils represent an ideal system to study how environmental properties shape the taxonomic and functional diversity of microbial communities given the relatively low diversity of Antarctic soil microbial communities and the pronou…

Barotropic seiches in a perennially ice‐covered lake, East Antarctica Open

Devin Castendyk, Hilary A. Dugan, H. Gallagher, Nimish Pujara, Peter T. Doran , et al. · 2021

Water movement in ice‐covered lakes is known to be driven by wind, sediment heat flux, solar radiation, saline density flows, and advective stream discharge. In large ice‐covered lakes, wind‐induced oscillations have been found to play a m…

Response of Antarctic soil fauna to climate‐driven changes since the Last Glacial Maximum Open

André L.C. Franco, Byron J. Adams, Melisa A. Diaz, Nathan P. Lemoine, Nicholas B. Dragone , et al. · 2021

Understanding how terrestrial biotic communities have responded to glacial recession since the Last Glacial Maximum (LGM) can inform present and future responses of biota to climate change. In Antarctica, the Transantarctic Mountains (TAM)…

Relationship between meteoric 10 Be and NO 3 − concentrations in soils along Shackleton Glacier, Antarctica Open

Melisa A. Diaz, Lee B. Corbett, Paul R. Bierman, Byron J. Adams, Diana H. Wall , et al. · 2021

Outlet glaciers that flow through the Transantarctic Mountains (TAM) experienced changes in ice thickness greater than other coastal regions of Antarctica during glacial maxima. As a result, ice-free areas that are currently exposed may ha…

The geochemistry of Irish rivers Open

W. Berry Lyons, Anne E. Carey, Christopher B. Gardner, Susan A. Welch, Devin F. Smith , et al. · 2021

Study region: Ireland Study focus: Multiple studies have established that catchment geology and weathering regime strongly influence surface water chemistry, and that geochemical cycling can vary due to seasonal climatic conditions. Howeve…

Scientific access into Mercer Subglacial Lake: scientific objectives, drilling operations and initial observations Open

John C. Priscu, Jonas Kalin, John R. Winans, Timothy D. Campbell, Matthew R. Siegfried , et al. · 2021

The Subglacial Antarctic Lakes Scientific Access (SALSA) Project accessed Mercer Subglacial Lake using environmentally clean hot-water drilling to examine interactions among ice, water, sediment, rock, microbes and carbon reservoirs within…

Exploring the Boundaries of Microbial Habitability in Soil Open

Nicholas B. Dragone, Melisa A. Diaz, Ian D. Hogg, W. Berry Lyons, W. Andrew Jackson , et al. · 2021

Microbes are widely assumed to be capable of colonizing even the most challenging terrestrial surface environments on Earth given enough time. We would not expect to find surface soils uninhabited by microbes as soils typically harbor dive…

Geochemical zones and environmental gradients for soils from the central Transantarctic Mountains, Antarctica Open

Melisa A. Diaz, Christopher B. Gardner, Susan A. Welch, W. Andrew Jackson, Byron J. Adams , et al. · 2021

Previous studies have established links between biodiversity and soil geochemistry in the McMurdo Dry Valleys, Antarctica, where environmental gradients are important determinants of soil biodiversity. However, these gradients are not well…

Enhanced trace element mobilization by Earth’s ice sheets Open

Jon Hawkings, Mark Skidmore, Jemma L. Wadham, John C. Priscu, Peter L. Morton , et al. · 2020

Significance Trace elements are integral to biogeochemical processes at the Earth’s surface and play an important role in the carbon cycle as micronutrients to support biological productivity. We present data from the Greenland and Antarct…

Stable Isotopes of Nitrate, Sulfate, and Carbonate in Soils From the Transantarctic Mountains, Antarctica: A Record of Atmospheric Deposition and Chemical Weathering Open

Melisa A. Diaz, Jianghanyang Li, Greg Michalski, Thomas H. Darrah, Byron J. Adams , et al. · 2020

Soils in ice-free areas in Antarctica are recognized for their high salt concentrations and persistent arid conditions. While previous studies have investigated the distribution of salts and potential sources in the McMurdo Dry Valleys, lo…

Genetic diversity of soil invertebrates corroborates timing estimates for past collapses of the West Antarctic Ice Sheet Open

Gemma E Collins, Ian D. Hogg, Peter Convey, Leopoldo G. Sancho, Don A. Cowan , et al. · 2020

Significance Changes in the extent of ice sheets through evolutionary timescales have influenced the connectivity of soil invertebrate populations across the Antarctic landscape. We use genetic divergences to estimate isolation times for s…

Exploring the boundaries of microbial habitability in soil Open

Nicholas B. Dragone, Melisa A. Diaz, Ian D. Hogg, W. Berry Lyons, W. Andrew Jackson , et al. · 2020

Microbes are widely assumed to be capable of colonizing even the most challenging terrestrial surface environments on Earth given enough time. We would not expect to find surface soils uninhabited by microbes as soils typically harbor dive…

Silicon Isotopic Composition of Dry and Wet-Based Glaciers in Antarctica Open

Jade Hatton, Katharine Hendry, Catherine Hirst, Sophie Opfergelt, Susann Henkel , et al. · 2020

Glaciers and ice sheets export significant amounts of silicon (Si) to downstream ecosystems, impacting local and potentially global biogeochemical cycles. Recent studies have shown Si in Arctic glacial meltwaters to have an isotopically di…

Relative terrestrial exposure ages inferred from meteoric 10 Be and NO 3 − concentrations in soils along the Shackleton Glacier, Antarctica Open

Melisa A. Diaz, Lee B. Corbett, Paul R. Bierman, Byron J. Adams, Diana H. Wall , et al. · 2020

Modeling studies and field mapping show that increases in ice thickness during glacial periods were not uniform across Antarctica. Rather, outlet glaciers that flow through the Transantarctic Mountains (TAM) experienced the greatest change…

Silicon Isotopes Reveal a Non-glacial Source of Silicon to Crescent Stream, McMurdo Dry Valleys, Antarctica Open

Catherine Hirst, Sophie Opfergelt, F. Gaspard, Katharine Hendry, Jade Hatton , et al. · 2020

In high latitude environments, silicon is supplied to river waters by both glacial and nonglacial chemical weathering. The signal of these two end-members is often obscured by biological uptake and/or groundwater input in the river catchme…

An Introduction to “Microbial Biogeochemistry: A Special Issue of Aquatic Geochemistry Honoring Mark Hines” Open

W. Berry Lyons, David J. Burdige · 2020

Uranium in Ohio, USA Surface Waters: Implications for a Fertilizer Source in Waters Draining Agricultural lands Open

W. Berry Lyons, Christopher B. Gardner, Susan A. Welch, Samantha Israel · 2020

Synthetic fertilizer is a potential source of uranium to natural waters, yet evidence is lacking. We analyzed dissolved uranium concentrations in lakes, reservoirs, and rivers in Ohio, USA during the summer of 2017. All water bodies drain …

The hydrogeochemistry of shallow groundwater from Lut Desert, Iran: The hottest place on Earth Open

W. Berry Lyons, Susan A. Welch, Christopher B. Gardner, Arash Sharifi, Amir AghaKouchak , et al. · 2020

Validation of sampling antarctic subglacial hypersaline waters with an electrothermal ice melting probe (IceMole) for environmental analytical geochemistry Open

Laura German, Jill A. Mikucki, Susan A. Welch, Kathleen A. Welch, Anthony Lutton , et al. · 2019

Geochemical characterisation of hypersaline waters is difficult as high concentrations of salts hinder the analysis of constituents at low concentrations, such as trace metals, and the collection of samples for trace metal analysis in natu…

The Hydroecology of an Ephemeral Wetland in the McMurdo Dry Valleys, Antarctica Open

A. N. Wlostowski, Nicholas O. Schulte, Byron J. Adams, Becky A. Ball, Rhea M. M. Esposito , et al. · 2019

The McMurdo Dry Valleys is a polar desert on the coast of East Antarctica where ephemeral wetlands become hydrologically active during warm and sunny summers when subsurface flows are generated from melting snowfields. To understand the st…

Groundwater discharge to the western Antarctic coastal ocean Open

K. A. Null, D. Reide Corbett, J. Crenshaw, Richard N. Peterson, Leigha E. Peterson , et al. · 2019

Submarine groundwater discharge (SGD) measurements have been limited along the Antarctic coast, although groundwater discharge is becoming recognized as an important process in the Antarctic. Quantifying this meltwater path-way is importan…

The Geochemistry of Englacial Brine From Taylor Glacier, Antarctica Open

W. Berry Lyons, Jill A. Mikucki, Laura German, Kathleen A. Welch, Susan A. Welch , et al. · 2019

Blood Falls is a hypersaline, iron‐rich discharge at the terminus of the Taylor Glacier in the McMurdo Dry Valleys, Antarctica. In November 2014, brine in a conduit within the glacier was penetrated and sampled using clean‐entry techniques…

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