Sediment connectivity: A framework for analyzing coastal sediment transport pathways
Stuart Pearson, Bram C. van Prooijen, Edwin P.L. Elias, Sean Vitousek, Zheng Bing Wang
2020, Journal of Geophysical Research: Earth Surface (125)
Connectivity provides a framework for analyzing coastal sediment transport pathways, building on conceptual advances in graph theory from other scientific disciplines. Connectivity schematizes sediment pathways as a directed graph (i.e., a set of nodes and links). This study presents a novel application of graph theory and connectivity...
Getting to the root of plant‐mediated methane emissions and oxidation in a thermokarst bog
Jesse C Turner, Colby J Moorberg, Andrea Wong, Kathleen Shea, Mark Waldrop, Merritt R. Turetsky, Rebecca B. Neumann
2020, Journal of Geophysical Research Biogeosciences (125)
Vascular plants are important in the wetland methane cycle, but their effect on production, oxidation, and transport has high uncertainty, limiting our ability to predict emissions. In a permafrost‐thaw bog in Interior Alaska, we used plant manipulation treatments, field‐deployed planar optical oxygen sensors, direct measurements of methane...
Interaction between watershed features and climate forcing affects habitat profitability for juvenile salmon
Timothy E. Walsworth, Jeffrey R Baldock, Christian E. Zimmerman, Daniel E. Schindler
2020, Ecosphere (11)
Opportunities for growth and survival of aquatic organisms are spatially and temporally variable as habitat conditions across watersheds respond to interacting climatic, geomorphic, and hydrologic conditions. As conservation efforts often focus on identifying and protecting critical habitats, it is important to understand how this spatial and...
Visually communicating future climate in a web environment
Corey Davis, Heather D Aldridge, Ryan Boyles, Karen McNeal, Lindsay C. Mauldin, Rachel M. Atkins
2020, Weather, Climate, and Society (12) 877-896
While there is growing demand for use of climate model projections to understand the potential impacts of future climate on resources, there is a lack of effective visuals that convey the range of possible climates across spatial scales and with uncertainties that potential users need to inform their impact assessments...
Utica shale play oil and gas brines: Geochemistry and factors influencing wastewater management
Madalyn S. Blondes, Jenna L. Shelton, Mark A Engle, Jason Trembly, Colin A. Doolan, Aaron M. Jubb, Jessica Chenault, Elisabeth L. Rowan, Ralph J. Haefner, Brian E. Mailot
2020, Environmental Science & Technology (54) 13917-13925
The Utica and Marcellus Shale Plays in the Appalachian Basin are the fourth and first largest natural gas producing plays in the United States, respectively. Hydrocarbon production generates large volumes of brine (“produced water”) that must be disposed of, treated, or...
Accounting for land in the United States: Integrating physical land cover, land use, and monetary valuation
Scott A. Wentland, Zachary H. Ancona, Kenneth J. Bagstad, James W. Boyd, Julie L. Hass, Marina Gindelsky, Jeremy G. Moulton
2020, Ecosystem Services (46)
Land plays a critical role in both economic and environmental accounting. As an asset, it occupies a unique position at the intersection of the System of National Accounts (SNA), the System of Environmental-Economic Accounting Central Framework (SEEA-CF), and (as a spatial...
Using Markov chains to quantitatively assess movement patterns of invasive fishes impacted by a carbon dioxide barrier in outdoor ponds
Lauren K Borland, Collin J Mulcahy, Barb Bennie, Douglas D Baumann, Roger J. Haro, Molly Van Appledorn, Kathi Jo Jankowski, Aaron R. Cupp, Richard A. Erickson
2020, Natural Resource Modeling (33)
Natural resource managers use barriers to deter the movement of aquatic invasive species. Research and development of new invasive species barriers is often evaluated in pond and field scales using high‐resolution telemetry data. Telemetry data sets can be a rich source of data about fish movement and behavior but can...
Geologic and mineral map (modified from the 1975 original map compilation by A.S. Shadchinev and others) and hyperspectral surface materials maps of the Ghorband, Salang, and Panjsher River Basins; Kapisa, Panjsher, Parwan, and Baghlan Provinces, Afghanistan
2020, Open-File Report 2020-1101
IntroductionThe geologic map and cross sections are a redrafted and modified version of the Geologic map and map of mineral resources of the basins of Ghorband, Salang, and Panjsher; located in the Kapisa, Panjsher, Parwan, and Baghlan Provinces, Afghanistan. The original map and cross sections are contained in an unpublished...
Optimizing release strategies: A stepping-stone approach to reintroduction
N.A. Lloyd, Nathan J. Hostetter, C.L. Jackson, Sarah J. Converse, A. Moehrenschlager
2020, Article
Evaluation of alternative management strategies enables informed decisions to accelerate species recovery. For reintroductions, post-release survival to reproductive age is a key parameter influencing population growth. Here we trial a ‘stepping-stone’ method to maximize the success of captive-bred animals when the availability of more suitable wild-born release candidates is limited....
Expanding the feasibility of fish and wildlife assessments with close-kin mark–recapture
Benjamin Marcy-Quay, Suresh Sethi, Nina O. Therkildsen, Clifford E. Kraft
2020, Ecosphere (11)
Close-kin mark–recapture (CKMR) is a powerful new method for the assessment of fish and wildlife population dynamics. Unlike traditional mark–recapture techniques, the use of kinship as an identifying mark is robust to many forms of capture heterogeneity including variation in gear efficiency and tagging-based effects such as loss and differential...
Dynamics of marsh-derived sediments in lagoon-type estuaries
Carmine Donatelli, Tarandeep S. Kalra, Sergio Fagherazzi, Xoaohe Zhang, Nicoletta Leonardi
2020, Journal of Geophysical Research (125)
Salt marshes are valuable ecosystems that must trap sediments and accrete in order to counteract the deleterious effect of sea‐level rise. Previous studies have shown that the capacity of marshes to build up vertically depends on both autogenous and exogenous processes including eco‐geomorphic feedbacks and sediment supply from in‐land and...
Surficial geologic map of the Spirit Mountain SE and part of the Spirit Mountain NE 7.5' quadrangles, Nevada and Arizona
Kyle House, Ryan S. Crow, Philip A Pearthree, Amy L. Brock-Hon, Jonathan Schwing, Jacob O. Thacker, Brian F. Gootee
2020, Scientific Investigations Map 3448
This geologic map includes a trove of stratigraphic and geomorphic information that chronicles the inception and evolution of the lower Colorado River. The map area is located near the south end of the Lake Mead National Recreation Area about 80 km (50 mi) downstream from Hoover Dam. It spans parts...
Does channel narrowing by floodplain growth necessarily indicate sediment surplus? Lessons from sediment‐transport analyses in the Green and Colorado rivers, Canyonlands, Utah
David J. Dean, David J. Topping, Paul E. Grams, Alexander E. Walker, John C. Schmidt
2020, Journal of Geophysical Research: Earth Surface (125)
Analyses of suspended sediment transport provide valuable insight into the role that sediment supply plays in causing geomorphic change. The sediment supply within a river system evolves depending on the discharge, flood frequency and duration, changes in sediment input, and ecohydraulic conditions that modify sediment transport processes....
QCam: sUAS-based doppler radar for measuring river discharge
John W. Fulton, Isaac E. Anderson, C.-L. Chiu, Wolfram Sommer, Josip Adams, Tommaso Moramarco, David M. Bjerklie, Janice M. Fulford, Jeff L. Sloan, Heather Best, Jeffrey S. Conaway, Michelle J. Kang, Michael S. Kohn, Matthew J. Nicotra, Jeremy J. Pulli
2020, Remote Sensing (12)
The U.S. Geological Survey is actively investigating remote sensing of surface velocity and river discharge (discharge) from satellite-, high altitude-, small, unmanned aircraft systems- (sUAS or drone), and permanent (fixed) deployments. This initiative is important in ungaged basins and river reaches that lack the infrastructure to deploy...
Soil respiration response to rainfall modulated by plant phenology in a montane meadow, East River, Colorado, USA
Mathew Winnick, Corey R. Lawrence, Maeve McCormick, Jennifer Druhan, Kate Maher
2020, Journal of Geophysical Research Biogeosciences (125)
Soil respiration is a primary component of the terrestrial carbon cycle. However, predicting the response of soil respiration to climate change remains a challenge due to the complex interactions between environmental drivers, especially plant phenology, temperature, and soil moisture. In this study, we use a 1‐D diffusion‐reaction model to calculate...
Compounding effects of white pine blister rust, mountain pine beetle, and fire threaten four white pine species
Joan C Dudney, Jonathan C B Nesmith, Matthew Cahill, Jennifer E Cribbs, Dan M Duriscoe, Adrian Das, Nathan L. Stephenson, John J. Battles
2020, Ecosphere (11)
Invasive pathogens and bark beetles have caused precipitous declines of various tree species around the globe. Here, we characterized long‐term patterns of mountain pine beetle (Dendroctonus ponderosae; MPB) attacks and white pine blister rust, an infectious tree disease caused by the pathogen, Cronartium ribicola. We focused on four dominant white pine...
The role of pre-magmatic rifting in shaping a volcanic continental margin: An example from the Eastern North American Margin
G. Lang, Uri S. ten Brink, Deborah Hutchinson, G.S. Mountain, U. Schattner
2020, Journal of Geophysical Research-- Solid Earth (125)
Both magmatic and tectonic processes contribute to the formation of volcanic continental margins. Such margins are thought to undergo extension across a narrow zone of lithospheric thinning (~100 km). New observations based on existing and reprocessed data from the Eastern North American Margin contradict this hypothesis. With ~64,000 km of 2‐D seismic...
Phylogenetic escape from pests reduces pesticides on some crop plants
Ian Pearse, Jay Rosenheim
2020, Proceedings of the National Academy of Sciences (117) 26849-26853
Pesticides are a ubiquitous component of conventional crop production but come with considerable economic and ecological costs. We tested the hypothesis that variation in pesticide use among crop species is a function of crop economics and the phylogenetic relationship of a crop to native plants because unrelated crops accrue fewer...
Four-dimensional thermal evolution of the East African Orogen: Accessory phase petrochronology of crustal profiles through the Tanzanian Craton and Mozambique Belt, northeastern Tanzania
Francisco E. Apen, Roberta L. Rudnick, John M. Cottle, Andrew R.C. Kylander-Clark, Madalyn S. Blondes, Phil Piccoli, Gareth Seward
2020, Contributions to Mineralogy and Petrology (175)
U–Pb petrochronology of deep crustal xenoliths and outcrops across northeastern Tanzania track the thermal evolution of the Mozambique Belt and Tanzanian Craton following the Neoproterozoic East African Orogeny (EAO) and subsequent Neogene rifting. At the craton margin, the upper–middle crust record thermal quiescence since the Archean...
Evidence for primitive magma storage and eruption following prolonged equilibration in thickened crust
Heather Winslow, Philipp Ruprecht, Mark E. Stelten, Alvaro Amigo
2020, Bulletin of Volcanology (82)
In continental arcs, the exposure of primitive eruptive products at the surface is typically a result of rapid magmatic transfer through the crust. As a result, the initially primitive magma experiences minimal crustal residence and thus insignificant differentiation towards more evolved products. This rapid transfer of primitive magma through thickened...
Determining habitat limitations of Maumee River walleye production to western Lake Erie fish stocks: Documenting a spawning ground barrier
Brian Schmidt, Taaja Tucker, Jessica Collier, Christine Mayer, Edward F. Roseman, Wendylee Stott, Jeremy J. Pritt
2020, Journal of Great Lakes Research (46) 1661-1673
Tributaries provide spawning habitat for three of four major sub-stocks of Lake Erie walleye (Sander vitreus). Despite anthropogenic degradation and the extirpation of other potamodromous species, the Maumee River, Ohio, USA continues to support one of the largest fish migrations in the Laurentian Great Lakes. To determine if spawning habitat...
Estimating the net costs of brine production and disposal to expand pressure-limited dynamic capacity for basin-scale CO2 storage in a saline formation
Steven T. Anderson, Hossein Jahediesfanjani
2020, International Journal of Greenhouse Gas Control (102)
If carbon capture and storage (CCS) needs to be deployed at basin- or larger-scale, it is likely that multiple sites will be injecting carbon dioxide (CO2) into the same geologic formation. This could lead to excessive pressure buildup, overlapping induced pressure fronts,...
Imaging the tectonic grain of the Northern Cordillera orogen using Transportable Array receiver functions
Vera Schulte-Pelkum, Jonathan Saul Caine, James V. Jones III, Thorsten W Becker
2020, Seismological Research Letters (91) 3086-3105
Azimuthal variations in receiver function conversions can image lithospheric structural contrasts and anisotropic fabrics that together compose tectonic grain. We apply this method to data from EarthScope Transportable Array in Alaska and additional stations across the northern Cordillera. The best‐resolved quantities are the strike and...
Micro-geographic variation in burrow use of Agassiz’s desert tortoises in the Sonoran Desert of California
Kristy L. Cummings, Jeffrey E. Lovich, Shellie R. Puffer, Terence R. Arundel, Kathleen D. Brundige
2020, The Herpetological Journal (30) 177-188
Little has been published regarding the burrowing habits of Agassiz’s desert tortoises (Gopherus agassizii) in the Sonoran Desert of California. We monitored the interactions of tortoises with their burrows, and other tortoises, via radio-telemetry at two nearby sites between the Cottonwood and Orocopia Mountains, from 2015-2018. We examined how annual...
Four decades of land-cover change on the Kenai Peninsula, Alaska: Detecting disturbance-influenced vegetation shifts using landsat legacy data
Carson Baughman, Rachel A. Loehman, Dawn R. Magness, Lisa Saperstein, Rosemary L. Sherriff
2020, Land (9)
Across Alaska’s Kenai Peninsula, disturbance events have removed large areas of forest over the last half century. Simultaneously, succession and landscape evolution have facilitated forest regrowth and expansion. Detecting forest loss within known pulse disturbance events is often straightforward given that reduction in tree cover is a...
