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Fluvially-sourced sediment supply and climate modulate morphodynamics and state transitions in bistable aeolian dunefields Fluvially-sourced sediment supply and climate modulate morphodynamics and state transitions in bistable aeolian dunefields
Alternative stable state theory in aeolian geomorphology describes the occurrence of bare and vegetated aeolian dunes in response to long-term climatic and ecological drivers. Transitions between states, as well as their co-occurrence (bistability), can arise from perturbations to drivers, disturbance, and associated biophysical feedbacks. Here, we examine the role of upwind fluvial...
Authors
Joshua Caster, Joel B. Sankey, Temuulen Sankey, Taylor Joyal, Matthew A. Bowker
Characterization of the native freshwater mussel assemblage across a reach of the Rappahannock River, Virginia Characterization of the native freshwater mussel assemblage across a reach of the Rappahannock River, Virginia
Native freshwater mussels occur in rivers of all sizes, yet much of the literature focuses on small- to medium-sized rivers, likely because of logistic challenges of sampling deep, fast, and turbid large rivers. As large-river surveys become more common, the information resulting from a systematic sampling design can provide baseline data on population sizes to inform decision making by...
Authors
Traci P. DuBose, Jason J. Rohweder, Catherine M Gatenby, Brian Watson, Teresa J. Newton
Extensive glacier loss in the coterminous United States Extensive glacier loss in the coterminous United States
Glaciers populate the mountain ranges of the western conterminous United States and despite their importance to alpine hydrology, their area and volume change have never been comprehensively evaluated. Since the mid-Twentieth Century about one-quarter of the glaciers have disappeared and the overall area and volume are reduced by one-third. The pattern of glacier shrinkage suggests most...
Authors
Andrew G. Fountain, Bryce Glenn, Christopher McNeil, Brian Menounos
Range-wide population trend analysis for greater sage-grouse (Centrocercus urophasianus)—Updated 1960–2025 Range-wide population trend analysis for greater sage-grouse (Centrocercus urophasianus)—Updated 1960–2025
Greater sage-grouse (Centrocercus urophasianus; hereafter sage-grouse) are at the center of State and national land-use policies largely because of their unique life-history traits as an ecological indicator for the health of sagebrush ecosystems. This updated population analysis provides State and Federal land and wildlife managers with the best available science to help guide...
Authors
Brian G. Prochazka, Peter S. Coates, Cameron L. Aldridge, Michael S. O’Donnell, Adrian P. Monroe, Steve E. Hanser, John C. Tull, Lief A. Wiechman, Michael P. Chenaille, Michael T. Atamian, Kathy A. Griffin, Heather F. Harris, Jesse L. Kolar, Katherine S. Miller, Michael A. Schroeder, Justin R. Small, Alex J. Solem, Jennifer L. Struthers, Heather L. Talley, Skyler T. Vold
Environmental relationships with Silver Carp population ecology across the Mississippi River basin Environmental relationships with Silver Carp population ecology across the Mississippi River basin
Objective
Authors
Jeffery N. Stevens, Cooper E. Barshinger, Andrew L. Althoff, Derek K. Owens, Jamie L. Kindschuh, Jonathan J. Spurgeon, Michael E. Eggleton, Steve E. Lochmann
Mapping groundwater recharge potential and an assessment of available hydrogeologic data within five selected focus areas in eastern Nebraska Mapping groundwater recharge potential and an assessment of available hydrogeologic data within five selected focus areas in eastern Nebraska
Groundwater recharge potential was mapped using airborne electromagnetic survey data collected over the previously glaciated part of eastern Nebraska. To evaluate the appropriate resolution at which airborne electromagnetic data should be interpolated (or represented), we compared a 500-meter cell raster and a filled contour shapefile to known geologic features, point...
Authors
Christopher M. Hobza, Kellan R. Strauch
Methodology for assessing the accuracy of long-term, annual land cover monitoring at national scale: Experiences from the Land Change Monitoring, Assessment, and Projection (LCMAP) initiative Methodology for assessing the accuracy of long-term, annual land cover monitoring at national scale: Experiences from the Land Change Monitoring, Assessment, and Projection (LCMAP) initiative
Annual land cover monitoring using medium-resolution satellite imagery represents a transition from periodic mapping campaigns to continuous observation systems. This transition introduces accuracy assessment challenges not encountered in one-time mapping efforts, particularly when the initial monitoring period is extended forward in time. These challenges are not addressed in existing...
Authors
Danika F. Wellington, Stephen V. Stehman, Josephine Horton, Bruce Pengra, Christopher P. Barber
Dismembering the Lava Creek Tuff, Yellowstone volcano Dismembering the Lava Creek Tuff, Yellowstone volcano
The youngest large explosive eruption of Yellowstone volcano generated the 0.63 Ma Lava Creek Tuff (LCT) ignimbrite and a voluminous, widespread fall deposit accompanying formation of Yellowstone Caldera. The tuff is conventionally divided into members A (LCT-A) and B (LCT-B), defined by a reversal in density/welding profiles and the presence of phenocrystic amphibole in LCT-A. Remapping...
Authors
Stacy L. Henderson, Madison L. Myers, Mark E. Stelten, Colin J.N. Wilson
Quality of groundwater used for domestic supply in the western Central Valley, California—2023 Quality of groundwater used for domestic supply in the western Central Valley, California—2023
More than 2 million Californians rely on groundwater from domestic wells for their drinking-water supply. This report summarizes a 2023 California Groundwater Ambient Monitoring and Assessment Priority Basin Project water-quality survey of 44 domestic and small-system drinking-water supply wells in the western Sacramento Valley (basin number 5-021) and San Joaquin Valley (basin number 5...
Authors
Kirsten E. Faulkner, Bryant C. Jurgens
Duck nesting response to experimental management of upland habitats in California Duck nesting response to experimental management of upland habitats in California
Habitat loss and limited upland nesting cover likely constrain waterfowl productivity in intensively managed wetland landscapes in California, USA. We evaluated whether experimental manipulations of upland habitats, including the seeding of native plants, dense nesting cover, or cereal grains, could enhance nesting vegetation and improve duck nest density and nest survival in a...
Authors
Mark P. Herzog, Joshua T. Ackerman, Robert Eddings
Insights from more than a year of ongoing episodic lava fountaining at Kilauea Insights from more than a year of ongoing episodic lava fountaining at Kilauea
Episodic lava fountaining is rare globally, with only three occurrences from Kīlauea (Hawaii) since 1823. Beginning in December 2024, an eruption within the summit crater, Halemaʻumaʻu, has produced 52 fountaining episodes to date, each lasting typically for hours and separated by days to weeks. Although multiple mechanisms have been proposed, fundamental questions remain about how magma...
Authors
Ashton F. Flinders, Natalia I. Deligne, Ken Hon, Drew T. Downs, Kendra J. Lynn, Patricia A. Nadeau, Katie Mulliken, Jefferson C. Chang, Peter J. Dotray, Marco Bagnardi, Ingrid A. Johanson, Michael H. Zoeller, Kyle R. Anderson, Matthew R. Patrick, Christoph Kern, Christine Ruth Sealing, Michael P. Poland, David Alan Phillips, Michael Cappos, Liliana G. Desmither, Andria P. Ellis, Steven Fuke, Pauline N. Fukunaga, Madeline Kaliko Hawk, Thomas-Jon Kekoa Hiroaki Hoomanawanui, John David Jamora, Albert Keliiaimoku Kamake'eaina, Kevan Kamibayashi, William Tollett, Kody Rubio, Seth Soren Swaney, S. Miki Warren, Heather Brianne Winslow, Ninfa Lucia Bennington, Arthur Jolly, R.G. Adams, M. Decker, L. Forster, Elisabeth Gallant, Cheryl Gansecki, Richard W. Hazlett, B.F. Houghton, N. Kohagura, S. Lundblad, N.G. Pasqualon, K. Poepoe, Hannah Kelsay Neuman, C. Cauley, K. Wilde
Improving estimates of spatially distributed agricultural land use using pesticide data Improving estimates of spatially distributed agricultural land use using pesticide data
Accurate, spatially resolved agricultural land-use data are essential for estimating water demand, evaluating agricultural production, and understanding long-term changes in managed landscapes. However, existing land-use datasets are often temporally discontinuous, particularly for historical periods, and remotely sensed classifications face persistent challenges distinguishing...
Authors
Stefan Voss, Wesley R. Henson