Hydrology and water quality in 15 watersheds in DeKalb County, Georgia, 2012–16
Brent T. Aulenbach, Katharine Kolb, John K. Joiner, Andrew E. Knaak
2022, Scientific Investigations Report 2021-5126
The U.S. Geological Survey, in cooperation with DeKalb County Department of Watershed Management, established a long-term water-quantity and water-quality monitoring program in 2012 to monitor and analyze the hydrologic and water-quality conditions of 15 watersheds in DeKalb County, Georgia—an urban and suburban area located in north-central Georgia that includes the...
Main-stem seepage and base-flow recession time constants in the Niobrara National Scenic River Basin, Nebraska, 2016–18
Kellan R. Strauch, Philip J. Soenksen
2022, Scientific Investigations Report 2021-5102
The Niobrara River of northern Nebraska is a valuable water resource that sustains irrigated agriculture and recreation, as well as a diverse ecosystem. Large-quantity withdrawals from the source aquifer system have the potential to reduce the flow into the river and to adversely affect the free-flowing condition of the Niobrara...
Landscape and stocking effects on population genetics of Tennessee Brook Trout
John S. Hargrove, David C. Kazyak, Barbara A. Lubinski, Karli M. Rogers, Olivia K. Bowers, Kurt A. Fesenmyer, Jim W. Habera, Jason Henegar
2022, Conservation Genetics (23) 341-357
Throughout their range, Brook Trout (Salvelinus fontinalis) occupy thousands of disjunct drainages with varying levels of disturbance, which presents substantial challenges for conservation. Within the southern Appalachian Mountains, fragmentation and genetic drift have been identified as key threats to the genetic diversity of the Brook Trout...
Extensive species diversification and marked geographic phylogenetic structure in the Mesoamerican genus Stenopelmatus (Orthoptera: Stenopelmatidae: Stenopelmatinae) revealed by mitochondrial and nuclear 3RAD data
Jorge S. Gutiérrez, Alejandro Zaldivar-Riveron, David B Weissman, Amy G. Vandergast
2022, Invertebrate Systematics (36)
The Jerusalem cricket subfamily Stenopelmatinae is distributed from south-western Canada through the western half of the United States to as far south as Ecuador. Recently, the generic classification of this subfamily was updated to contain two genera, the western North American Ammopelmatus, and the Mexican, and central and northern...
Gas hydrates on Alaskan marine margins
Carolyn D. Ruppel, Patrick E. Hart
2022, Book chapter, World atlas of submarine gas hydrates in continental margins
Gas hydrate distributions on the marine margins of the U.S. state of Alaska are more poorly known than those on other U.S. margins, where bottom simulating reflections have been systematically mapped on marine seismic data to support modern, quantitative assessments of gas-in-place in gas hydrates. The extent of bottom simulating...
Caretta caretta (Loggerhead Sea Turtle) nesting exchange
Margaret Lamont, Jennifer S. Walker, Donna J. Shaver
2022, Herpetological Review (52) 626-627
The Northwest Atlantic population of Loggerhead Sea Turtles (Caretta caretta) is one of the largest C. caretta populations in the world and is listed as threatened. This population was divided into five genetically distinct subpopulations, including the Northern Gulf of Mexico (NGoM) subpopulation (Shamblin et al. 2017 Mar. Bio. 164:138)....
Reconstructing the paleoceanographic and redox conditions responsible for variations in uranium content in North American Devonian black shales
Michelle L. Abshire, Natascha Riedinger, John M. Clymer, Clint Scott, Silke Severmann, Stephen J. Romaniello, James O. Puckette
2022, Palaeogeography, Palaeoclimatology, Palaeoecology (587)
The uranium (U) content, and more recently, the ratio between 238U and 235U in black shales are commonly applied as a proxy to determine redox conditions and infer organic-richness. Uranium contents typically display a linear relationship with total organic carbon (TOC) in shales. This relationship is due to...
The statistical power to detect regional temporal trends in riverine contaminants in the Chesapeake Bay Watershed, USA
Tyler Wagner, Paul McLaughlin, Kelly L. Smalling, Sara E. Breitmeyer, Stephanie E. Gordon, Gregory E. Noe
2022, Science of the Total Environment (812)
Chemical contamination of riverine ecosystems is largely a result of urbanization, industrialization, and agricultural activities occurring on adjacent terrestrial landscapes. Land management activities (e.g., Best Management Practices) are an important tool used to reduce point and non-point sources of pollution. However, the ability to confidently make inferences about the efficacy...
Genetic variation in sea otters (Enhydra lutris) from the North Pacific with relevance to the threatened Southwest Alaska Distinct Population Segment
Blair G. Flannery, Ora L. Russ, Michelle St. Martin, William S. Beatty, Kristen Worman, Joel Garlich-Miller, Verena A. Gill, Patrick R. Lemons, Daniel Monson, Kimberly A. Kloecker, Daniel Esler, John Wenburg
2022, Marine Mammal Science (38) 858-880
For the sea otter (Enhydra lutris), genetic population structure is an area of research that has not received significant attention, especially in Southwest Alaska where that distinct population segment has been listed as threatened since 2005 pursuant to the U.S. Endangered Species Act. In this study,...
Effects of stream intermittency on minnow (Leuciscidae) and darter (Percidae) trophic dynamics in an agricultural watershed
Christine E. Fallon, Krista A. Capps, Mary Freeman, Chelsea R. Smith, Stephen W. Golladay
2022, Ecology of Freshwater Fishes (31) 544-558
Stream intermittency is predicted to increase where water withdrawals and climate warming are increasing. In regions coupled with high fish diversity, understanding how intermittency influences fish trophic ecology is critical for informing ecosystem function. This study compared fish diets across seasons in perennial and intermittent streams...
Using fish community and population indicators to assess the biological condition of streams and rivers of the Chesapeake Bay watershed, USA
Kelly O. Maloney, Kevin P. Krause, Matthew J. Cashman, Wesley M. Daniel, Benjamin P. Gressler, Daniel J. Wieferich, John A. Young
2022, Ecological Indicators (134)
The development of indicators to assess relative freshwater condition is critical for management and conservation. Predictive modeling can enhance the utility of indicators by providing estimates of condition for unsurveyed locations. Such approaches grant understanding of where “good” and “poor” conditions occur and provide insight into landscape contexts supporting such conditions....
A review of algal toxin exposures on reserved federal lands and among trust species in the United States
Zachary R. Laughrey, Victoria Christensen, Robert J. Dusek, Sarena Senegal, Julia S. Lankton, Tracy Ziegler, Lee C. Jones, Daniel K. Jones, Brianna M. Williams, Stephanie E. Gordon, Gerald A. Clyde, Erich B Emery, Keith A. Loftin
2022, Critical Reviews in Environmental Science and Technology (52) 4284-4307
Associated health effects from algal toxin exposure are a growing concern for human and animal health. Algal toxin poisonings may occur from contact with or consumption of water supplies or from ingestion of contaminated animals. The U.S. Federal Government owns or holds in trust about 259 million...
Seismotectonic analysis of the 2019–2020 Puerto Rico sequence: The value of absolute earthquake relocations in improved interpretations of active tectonics
C.W. Cromwell, K.P. Furlong, E.A. Bergman, Harley M. Benz, William L. Yeck, M. Herman
2022, Seismological Research Letters (93) 544-554
We present a new catalog of calibrated earthquake relocations from the 2019–2020 Puerto Rico earthquake sequence related to the 7 January 2020 Mw 6.4 earthquake that occurred offshore of southwest Puerto Rico at a depth of 15.9 km. Utilizing these relocated earthquakes and associated moment tensor...
Review of ESA SYMP 7: A dynamic perspective on ecosystem restoration–establishing temporal connectivity at the intersection between paleoecology and restoration ecology
Rachel Reid, Jenny McGuire, Jens-Christiane Svenning, G. Lynn Wingard, David Moreno-Mateos
2022, Bulletin Ecological Society of America (103)
Landscape connectivity is vital not only spatially, but also temporally; as ecosystems change, it is important to be aware of past, present, and future variables that may impact ecosystem function and biodiversity. As climate and environments continue to change, choosing appropriate restoration targets is becoming more challenging. By considering the...
Factors Affecting Groundwater Quality Used for Domestic Supply in Marcellus Shale Region of North-Central and North-East Pennsylvania, USA
Charles A. Cravotta III, Lisa A. Senior, Matthew D. Conlon
2022, Applied Geochemistry (137)
Factors affecting groundwater quality used for domestic supply within the Marcellus Shale footprint in north-central and north-east Pennsylvania are identified using a combination of spatial, statistical, and geochemical modeling. Untreated groundwater, sampled during 2011–2017 from 472 domestic wells within the study...
Correspondence analysis for mineral commodity research: An example workflow for mineralized calderas, southwest United States
Joshua Mark Rosera, Drew S Coleman
2022, Natural Resources Research (31) 9-36
Historical mine and mineral deposit datasets are routinely used to inform quantitative mineral assessment models, but they also can contain a wealth of supplementary qualitative information that is generally underutilized. We present a workflow that uses correspondence analysis, an exploratory tool commonly applied to multivariate abundance...
Downhill from Austin and Ely to Las Vegas: U-Pb detrital zircon suites from the Eocene–Oligocene Titus Canyon Formation and associated strata, Death Valley, California
Elizabeth L. Miller, Mark Raftrey, Jens-Erik Lundstern
2022, GSA Special Papers (555)
In a reconnaissance investigation aimed at interrogating the changing topography and paleogeography of the western United States prior to Basin and Range faulting, a preliminary study made use of U-Pb ages of...
New insights on faulting and intrusion processes during the June 2007, East Rift Zone eruption of Kilauea volcano, Hawai'i
J. Leeburn, C. Wauthier, Emily K. Montgomery-Brown, J. Gonzalez-Santana
2022, Journal of Volcanology and Geothermal Research (421)
The East Rift Zone (ERZ) of Kīlauea Volcano, Hawai'i, represents one of the most volcanically active regions in the world. The 2007 Father's Day (FD) dike intrusion, eruption, and accompanying slow-slip event (SSE) has been previously modeled using geodetic data to constrain the geometry of the intrusion and the timing...
Magmatism, migrating topography, and the transition from Sevier shortening to Basin and Range extension, western United States
Jens-Erik Lundstern, Elizabeth L. Miller
2022, GSA Special Papers (555)
The paleogeographic evolution of the western U.S. Great Basin from the Late Cretaceous to the Cenozoic is critical to understanding how the North American Cordillera at this latitude transitioned from Mesozoic shortening...
Evaluation of intensity prediction equations (IPEs) for small-magnitude earthquakes
Ganyu Teng, Jack W. Baker, David J. Wald
2022, Bulletin of the Seismological Society of America (112) 316-330
This study assesses existing intensity prediction equations (IPEs) for small unspecified magnitude (M ≤3.5) earthquakes at short hypocentral distances (Dh) and explores such earthquakes’ contribution to the felt...
Selective host attachment by Ixodes scapularis (Acari: Ixodidae): Tick-lizard associations in the southeastern United States
Howard Ginsberg, Graham J. Hickling, Genevieve Pang, Jean I. Tsao, Meghan Fitzgerald, Breann Ross, Eric L. Rulison, Russell L. Burke
2022, Journal of Medical Entomology (59) 267-272
Questing behavior and host associations of immature blacklegged ticks, Ixodes scapularis Say, from the southeastern United States are known to differ from those in the north. To elucidate these relationships we describe host associations of larval and nymphal I. scapularis from 8 lizard species sampled from 5 sites in the southeastern U.S. Larvae and...
The role of preexisting upper plate strike-slip faults during long-lived (ca. 30 Myr) oblique flat slab subduction, southern Alaska
Trevor Waldien, Richard O. Lease, Sarah Roeske, Jeff Benowitz, Paul O'Sullivan
2022, Earth and Planetary Science Letters (557)
Upper plates of subduction zones commonly respond to flat slab subduction by structural reactivation, magmatic arc disruption, and foreland basin inversion. However, the role of active strike-slip faults in focusing convergent deformation and magmatism in response to oblique flat slab subduction remains...
Retention and dimensional changes of evergreen brush piles within a flood control reservoir
C.A. Aldridge, D.M. Norris, H.R. Hatcher, G. Coppola, M.E. Colvin, Leandro E. Miranda
2022, Journal of Fish and Wildlife Management (13) 223-235
Brush piles (i.e., trees and large woody debris) are often installed in reservoirs to supplement fish habitat. The retention and dimensional change of brush piles after installation is important information that can be used to maximize the effectiveness of this management action. We evaluated the retention and dimensional change of...
Landscape- and local- level variables affect monarchs in Midwest grasslands
Anna Skye Bruce, Wayne E. Thogmartin, Chris Trosen, Karen Oberhauser, Claudio Gratton
2022, Landscape Ecology (37) 93-108
ContextIt is estimated that over one billion milkweed stems need to be restored to sustain the eastern North American migratory population of monarch butterflies; where and in what context the stems should be placed on the landscape is key to addressing habitat deficits.ObjectivesWe assessed how the...
Development of a multiplex fluorescence in situ hybridization assay to identify coinfections in young-of-the-year smallmouth bass
Heather L. Walsh, Vicki S. Blazer, Patricia M. Mazik
2022, Journal of Aquatic Animal Health (34) 12-19
Histopathological assessments of young-of-the-year (age-0) Smallmouth Bass Micropterus dolomieu in the Susquehanna River drainage identified a high prevalence of the myxozoan Myxobolus inornatus. This myxozoan infects the connective tissue of the muscle below the skin but is sometimes observed in the esophagus and buccal cavity. In some instances, shallow infections cause breaks in...
