Geologic map of the Patrick quadrangle, Chesterfield County, South Carolina
Bradley A. Fitzwater, G. Richard Whittecar, Christopher S. Swezey
2020, Geologic Quadrangle Map GQM-57
The Patrick 7.5 minute quadrangle, located in Chesterfield County, South Carolina, lies entirely within the upper Atlantic Coastal Plain province. Directly to the southeast in the Dovesville quadrangle, the Pliocene Orangeburg Scarp marks the western edge of marine terraces that characterize the upper limit of the middle Atlantic Coastal Plain....
Malaclemys terrapin (Diamondback terrapin) Lepadomorph epibionts
Margaret Lamont, Daniel J. Catizone, Richard O’Connor, Robert Blais, Limarie Rodgriguez, Cathy Holmes
2020, Herpetological Review (52) 633-634
Diamondback terrapins (Malaclemys terrapin) are distributed along the Atlantic and Gulf of Mexico (GoM) coasts of the U.S.A. (Hart et al. 2014. Conserv. Genet. DOI 10.1007/s10592-014-0563-6). Under consideration for listing in Florida and proposed for Appendix II listing by the U.S. at CoP16 (CITES), terrapin populations are declining in many...
Use of museum specimens to refine historical pronghorn subspecies boundaries
Erin E. Hahn, Anastasia Klimova, Adrian Munguia-Vega, Kevin B. Clark, Melanie Culver
2020, Journal of Wildlife Management (64) 524-533
Endangered Sonoran (Antilocapra americana sonoriensis) and Peninsular (A. a. peninsularis) pronghorn persist largely because of captive breeding and reintroduction efforts. Recovery team managers want to re-establish pronghorn in their native range, but there is currently uncertainty regarding the subspecies status of extinct pronghorn populations that historically...
Patterns and drivers of atmospheric river precipitation and hydrologic impacts across the western United States
Christine M. Albano, Michael D. Dettinger, Adrian Harpold
2020, Journal of Hydrometeorology (21) 143-159
Atmospheric rivers (ARs) significantly influence precipitation and hydrologic variability in many areas of the world, including the western United States. As ARs are increasingly recognized by the research community and the public, there is a need to more precisely quantify and communicate their hydrologic impacts, which can vary from hazardous...
Benthic infaunal communities of Baltimore and Norfolk Canyons
Craig M. Robertson, Jill R. Bourque, Amanda Demopoulos
2020, Report
The imperative for finding, cataloging, and understanding continental margin diversity derives from the many key functions, goods and services provided by margin ecosystems and by an increasingly deleterious human footprint on our continental slopes (Levin and Dayton 2009). Progress in seafloor mapping technology and direct observation has revealed unexpected heterogeneity, with a...
Semiautomated process for enumeration of fishes from recreational-grade side-scan sonar imagery
Katelyn M Lawson, Josey Lee Ridgway, Andrew T. Mueller, Jacob Faulkner, Robin D. Calfee
2020, North American Journal of Fisheries Management (40) 75-83
The use of hydroacoustic techniques is increasing as scientists search for less invasive ways to monitor fish populations, and using recreational side‐scan sonar (SSS) imagery for monitoring has become more common in aquatic resource management over the last 15 years due in part to its low cost and user‐friendly interface....
Temporospatial shifts in Sandhill Crane staging in the Central Platte River Valley in response to climatic variation and habitat change
Andrew J. Caven, Emma M. Brinley Buckley, Kelsey C King, Joshua D Wiese, David M. Baasch, Greg D. Wright, Mary J. Harner, Aaron T. Pearse, Matt Rabbe, Dana Varner, Brice Krohn, Nicole Arcilla, Kirk D Schroeder, Kenneth F Dinan
2020, Monographs of the Western North American Naturalist (11) 33-76
Over 80% of the Mid-Continent Sandhill Crane (Antigone canadensis) Population (MCP), estimated at over 660,000 individuals, stops in the Central Platte River Valley (CPRV) during spring migration from mid-February through mid-April. Research suggests that the MCP may be shifting its distribution spatially and temporally within the CPRV. From 2002 to...
Envisioning a national invasive species information framework
Jamie K Reaser, Annie Simpson, Gerald Guala, Jeffrey Morisette, Pam Fuller
2020, Biological Invasions (22) 21-36
With a view toward creating a national Early Detection and Rapid Response Program (EDRR) program, the United States National Invasive Species Council Management Plan for 2016–2018 calls for a series of assessments of federal EDRR capacities, including the evaluation of “relevant federal information systems to provide the data and other information necessary...
Scale-specific metrics for adaptive generalization and geomorphic classification of stream features
Larry Stanislawski, Barbara P. Buttenfield, Barry J. Kronenfeld, Ethan J. Shavers
2020, Conference Paper, Program and papers
The Richardson plot has been used to illustrate fractal dimension of naturally occurring landscape features that are sensitive to changes in scale or resolution, such as coastlines and river channels. The Richardson method estimates the length of a path by traversing (i.e., “walking”) the path with a specific stride length....
Event and decadal-scale modeling of barrier island restoration designs for decision support
Joseph W. Long, P. Soupy Dalyander, Michael Poff, Brian Spears, Brett Borne, David M. Thompson, Rangley C. Mickey, Steve Dartez, Gregory Gandy
2020, Shore & Beach (88) 49-57
An interdisciplinary project team was convened to develop a modeling framework that simulates the potential impacts of storms and sea level-rise to habitat availability at Breton Island, Louisiana (Breton) for existing conditions and potential future restoration designs. The model framework was iteratively developed through evaluation of model results at multiple...
A transect through Vermont's most famous volcano - Mount Ascutney
Gregory J. Walsh, Brooks P. Proctor, Karri R. Sicard, Peter M. Valley
2020, Conference Paper, 111th New England Intercollegiate Geological Conference
The Cretaceous Ascutney Mountain igneous complex affords a classic exposure of the White Mountain Igneous Suite. Often called Vermont’s most famous volcano, Mount Ascutney (elev. 3,144 feet, 958 m) stands as a prominent monadnock in the Connecticut River Valley. The mountain often serves as an inspirational landmark, as it...
Micrometer-scale characterization of solid mine waste aids in closure due diligence
Bryn E. Kimball, Heather E. Jamieson, Robert R. Seal, II, Agatha Dobosz, Nadine M. Piatak
2020, Conference Paper, Proceedings of tailings and mine waste 2019
Precious- and base-metal mining often occurs in deposits with high acid-generating potential, resulting in mine waste that contains metals in forms of varying bioavailability, and therefore toxicity. The solids that host these metals are often noncrystalline, nanometer to micrometer in size, or undetectable by readily available analytical techniques (e.g., X-ray...
Establishing high-frequency noise baselines to 100 Hz based on millions of power spectra from IRIS MUSTANG
Emily Wolin, Daniel McNamara
2020, Bulletin of the Seismological Society of America (110) 270-278
Advances in seismic instrumentation have enabled data to be recorded at increasing sample rates. This has in turn created a need to establish higher-frequency baselines for assessing data quality, as the widely-used New High (NHNM) and Low Noise Models (NLNM) of Peterson (1993) do not extend to frequencies above...
Integrating multiple data sources and multi-scale land-cover data to model the distribution of a declining amphibian
Jonathan P. Rose, Brian J. Halstead, Robert N. Fisher
2020, Biological Conservation (241)
Determining the spatial scale at which landscape features influence population persistence is an important task for conservation planning. One challenge is that sampling biases confound factors that influence species occurrence and survey effort. Recent developments in Point Process Models (PPMs) enable researchers to disentangle the sampling process from ecological drivers...
Assessment of leachable elements in volcanic ashfall: A review and evaluation of a standardized protocol for ash hazard characterization
Carol Stewart, David Damby, Ines Tomasek, Claire J. Horwell, Geoffrey S. Plumlee, Maria Aurora Armienta, Maria Gabriela Ruiz Hinojosa, Moya Appleby, Pierre Delmelle, Shane Cronin, Christopher J Ottley, Clive Oppenheimer, Suzette A. Morman
2020, Journal of Volcanology and Geothermal Research (392)
Volcanic ash presents a widespread and common hazard during and after eruptions. Complex interactions between solid ash surfaces and volcanic gases lead to the formation of soluble salts that may be mobilized in aqueous environments. A variety of stakeholders may be concerned about the effects of ash on human and...
Increasing accuracy of lake nutrient predictions in thousands of lakes by leveraging water clarity data
Tyler Wagner, oa Lottig Noah R. Lottig, Meridith L. Bartley, Ephraim M. Hanks, Erin M. Schliep, Nathan B. Wikle, Katelyn B. S. King, Ian McCullough, Jemma Stachelek, Kendra S. Cheruvelil, Christopher T. Filstrup, Jean-Francois Lapierre, Boyang Liu, Patricia Sorrano, Pang-Ning Tan, Q. Wang, Katherine Webster, Jiayu Zhou
2020, Limnology and Oceanography Letters (5) 228-235
Aquatic scientists require robust, accurate information about nutrient concentrations and indicators of algal biomass in unsampled lakes in order to understand and predict the effects of global climate and land-use change. Historically, lake and landscape characteristics have been used as predictor variables in regression models to generate nutrient predictions, but...
Metal bioavailability models: Current status, lessons learned, considerations for regulatory use, and the path forward
Christopher A. Mebane, M. Jasim Chowdhury, Karel A.C. De Schamphelaere, Stephen Lofts, Paul R. Paquin, Robert C. Santore, Chris M. Wood
2020, Environmental Toxicology and Chemistry (39) 60-84
Since the early 2000s, biotic ligand models and related constructs have been a dominant paradigm for risk assessment of aqueous metals in the environment. We critically review 1) the evidence for the mechanistic approach underlying metal bioavailability models; 2) considerations for the use and refinement of bioavailability-based toxicity models; 3)...
Thresholds for post-wildfire debris flows: Insights from the Pinal Fire, Arizona, USA
Carissa A Raymond, Luke A. McGuire, Ann M. Youberg, Dennis M. Staley, Jason W. Kean
2020, Earth Surface Processes and Landforms (45) 1349-1360
Wildfire significantly alters the hydrologic properties of a burned area, leading to increases in overland flow, erosion, and the potential for runoff-generated debris flows. The initiation of debris flows in recently burned areas is well-characterized by rainfall intensity-duration (ID) thresholds. However, there is currently a paucity of data quantifying the...
Local climate determines vulnerability to camouflage mismatch in snowshoe hares
Marketa Zimova, Alexej P. K. Siren, Joshua J. Nowak, Alexander Bryan, Jacob S. Ivan, Toni Lyn Morelli, Skyler L. Suhrer, Jesse Whittington, L. Scott Mills
2020, Global Ecology and Biogeography (29) 503-515
AimPhenological mismatches, when life‐events become mistimed with optimal environmental conditions, have become increasingly common under climate change. Population‐level susceptibility to mismatches depends on how phenology and phenotypic plasticity vary across a species’ distributional range. Here, we quantify the environmental drivers of colour moult phenology, phenotypic plasticity, and...
Microbial source tracking (MST) in Chattahoochee River National Recreation Area: Seasonal and precipitation trends in MST marker concentrations, and associations with E. coli levels, pathogenic marker presence, and land use
Anna M. McKee, Marirosa Molina, Mike Cyterski, Ann Couch
2020, Water Research (171)
Escherichia coli levels in recreational waters are often used to predict when fecal-associated pathogen levels are a human health risk. The reach of the Chattahoochee River that flows through the Chattahoochee River National Recreation Area (CRNRA), located in the Atlanta-metropolitan area, is a popular recreation area that frequently exceeds the U.S....
Spatial sampling bias and model complexity in stream-based species distribution models: A case study of Paddlefish (Polyodon spathula) in the Arkansas River basin, USA
A. T. Taylor, T. Hafen, Colt Taylor Holley, A. Gonzalez, James M. Long
2020, Ecology & Evolution (10) 705-717
Leveraging existing presence records and geospatial datasets, species distribution modeling has been widely applied to informing species conservation and restoration efforts. Maxent is one of the most popular modeling algorithms, yet recent research has demonstrated Maxent models are vulnerable to prediction errors related to spatial sampling bias and model complexity....
Assessing the water quality impacts of two Category-5 hurricanes on St. Thomas, Virgin Islands
Sunny Jiang, Muyue Han, Srikiran Chandrasekaran, Yingcong Fang, Christina A. Kellogg
2020, Water Research (171)
Managing waterborne and water-related diseases is one of the most critical factors in the aftermath of hurricane-induced natural disasters. The goal of the study was to identify water-quality impairments in order to set the priorities for post-hurricane relief and to guide future decisions on disaster preparation and relief administration. Field...
Effect of an environmental flow on vegetation growth and health using ground and remote sensing metrics
Martha M. Gomez-Sapiens, Christopher Jarchow, Karl W. Flessa, Patrick B. Shafroth, Edward P. Glenn, Pamela L. Nagler
2020, Hydrological Processes (34) 1682-1696
Understanding the effectiveness of environmental flow deliveries along rivers requires monitoring vegetation. Monitoring data are often collected at multiple spatial scales. For riparian vegetation, optical remote sensing methods can estimate growth responses at the riparian corridor scale, and field‐based measures can quantify species composition; however, the extent to which these...
The effect of sediment cover and female characteristics on the hatching success of walleye
Alex Gatch, S.K. Koenigbauer, Edward F. Roseman, T. Hook
2020, North American Journal of Fisheries Management (40) 293-302
Natural and anthropogenic sources of sedimentation have the potential to degrade spawning habitat and negatively affect incubating fish embryos. Walleye Sander vitreus are lithophilic broadcast spawners that use specific spawning habitats that are vulnerable to degradation caused by deposition of suspended sediments. We measured the effect of different types of sediment cover...
Algal toxins in Alaskan seabirds: Evaluating the role of saxitoxin and domoic acid in a large-scale die-off of Common Murres
Caroline R. Van Hemert, Sarah K. Schoen, R. Wayne Litaker, Matthew M. Smith, Mayumi L. Arimitsu, John F. Piatt, William C. Holland, Ransom Hardison, John M. Pearce
2020, Harmful Algae (92)
Elevated seawater temperatures are linked to the development of harmful algal blooms (HABs), which pose a growing threat to marine birds and other wildlife. During late 2015 and early 2016, a massive die-off of Common Murres (Uria algae; hereafter, murres) was observed in the Gulf of Alaska coincident with a...
