The effect of diagenesis and acetolysis on the preservation of morphology and ultrastructural features of pollen
Michael Zavada, Paul C. Hackley
2022, Review of Palaeobotany and Palynology (302)
Pollen morphology on its own and in conjunction with other characteristics has elucidated the origin and evolution of various plant groups. Previous studies of fossil pollen rarely discuss the effects of diagenesis and sample preparation on pollen characteristics, i.e., variability in staining, pollen...
Incorporating snowmelt into daily estimates of recharge using a state-space model of infiltration
Allen M. Shapiro, Frederick Day-Lewis, William M. Kappel, John Williams
2022, Groundwater (60) 721-746
A state-space model (SSM) of infiltration estimates daily groundwater recharge using time-series of groundwater-level altitude and meteorological inputs (liquid precipitation, snowmelt, and evapotranspiration). The model includes diffuse and preferential flow through the unsaturated zone, where preferential flow is a function of liquid precipitation and snowmelt rates and a threshold rate,...
U.S. Geological Survey national shoreline change— Summary statistics for updated vector shorelines (1800s–2010s) and associated shoreline change data for the Georgia and Florida coasts
Meredith G. Kratzmann
2022, Data Report 1156
Rates of shoreline change have been updated for the open-ocean sandy coastlines of Georgia and Florida as part of the U.S. Geological Survey’s Coastal Change Hazards programmatic focus. This work was formerly within the National Assessment of Shoreline Change project. Shorelines were compiled from the original report published in 2005,...
The potential of semi-structured citizen science data as a supplement for conservation decision-making: Validating the performance of eBird against targeted avian monitoring efforts
Erica Francis Stuber, Orin Robinson, Emily R. Bjerre, Mark C. Otto, Brian A. Millsap, Guthrie S. Zimmerman, Michael G. Brasher, Kevin M. Ringelman, Auriel Fournier, Aaron Yetter, Jennifer Isola, Viviana Ruiz-Gutierrez
2022, Biological Conservation (270)
Methods are being developed to capitalize on citizen science data for research and monitoring, but these data are rarely used within established decision-making frameworks of wildlife agencies. Citizen science data are often collected at higher resolution and extent than targeted monitoring programs, and may provide complementary information. Here, we demonstrate...
Using predictions from multiple anthropogenic threats to estimate future population persistence of an imperiled species
Brian Folt, Michael Marshall, Jo Anna Emanuel, Michelina Dziadzio, Jane Cooke, Lourdes Mena, Matthew Hinderliter, Scott Hoffmann, Nicole Rankin, John Tupy, Conor P. McGowan
2022, Global Ecology and Conservation (36)
Imperiled species face numerous and diverse anthropogenic threats to their persistence, and wildlife managers charged with making conservation decisions benefit from a sound understanding of how populations, species, and ecosystems will respond to future changes in threats to biodiversity. In southeastern North America, the gopher tortoise (Gopherus polyphemus) is a keystone species in upland...
Compression behavior of hydrate-bearing sediments
Yi Fang, Peter Flemings, John Germaine, Hugh Daigle, Stephen C. Phillips, Joshua O’Connell
2022, AAPG Bulletin (106) 1101-1126
This work experimentally explores porosity, compressibility, and the ratio of horizontal to vertical effective stress (K0) in hydrate-bearing sandy silts from Green Canyon Block 955 in the deep-water Gulf of Mexico. The samples have an in situ porosity of 0.38 to 0.40 and a hydrate saturation of more than...
Permeability of methane hydrate-bearing sandy silts in the deep-water Gulf of Mexico (Green Canyon Block 955)
Yi Fang, Peter Flemings, Hugh Daigle, Stephen C. Phillips, Joshua O’Connell
2022, AAPG Bulletin (106) 1071-1100
Permeability is one of the most crucial properties governing fluid flow in methane hydrate reservoirs. This paper presents a comprehensive permeability analysis of hydrate-bearing sandy silt pressure-cored from Green Canyon Block 955 (GC 955) in the deep-water Gulf of Mexico. We developed an experimental protocol to systematically characterize the...
Assessing conservation and management actions with ecosystem services better communicates conservation value to the public
David M. Mushet, Max Post van der Burg, Michael J. Anteau
2022, Journal of Fish and Wildlife Management (13)
Fish and wildlife populations are under unprecedented threats from changes in land use and climate. With increasing threats comes a need for an expanded constituency that can contribute to the public support and financial capital needed for habitat conservation and management. Using an ecosystem services approach can provide a framework...
Integrated geochemical approach to determine the source of methane in gas hydrate from Green Canyon Block 955 in the Gulf of Mexico
Myles T. Moore, Stephen C. Phillips, Ann Cook, Thomas H. Darrah
2022, AAPG Bulletin (106) 949-980
Massive volumes of gas are sequestered within gas hydrate in subsurface marine sediments in the Gulf of Mexico. Methane associated with gas hydrate is a potentially important economic resource and a significant reservoir of carbon within the global carbon cycle. Nevertheless, uncertainties remain about the genetic source (e.g., microbial,...
A forested wetland at a climate-induced tipping-point: 17-year demographic evidence of widespread tree recruitment failure
Jonathan Evans, Sarah McCarthy-Neumann, Angus Pritchard, Jennifer M. Cartwright, William J. Wolfe
2022, Forest Ecology and Management (517)
Regeneration and survival of forested wetlands are affected by environmental variables related to the hydrologic regime. Climate change, specifically alterations to precipitation patterns, may have outsized effects on these forests. In Tennessee, USA, precipitation has increased by 15% since 1960. The goal of our research was to assess the evidence...
Toxicity of wildland fire-fighting chemicals in pulsed exposures to rainbow trout and fathead minnows
Holly J. Puglis, Michael G. Iacchetta, Christina M. Mackey
2022, Environmental Toxicology and Chemistry (41) 1711-1720
Intrusions of fire-fighting chemicals in streams can result from containment and suppression of wildfires and may be harmful to native biota. We investigated the toxicity of seven current-use fire-fighting chemicals to juvenile rainbow trout (Oncorhynchus mykiss) and fathead minnows (Pimephales promelas) by simulating chemical intrusions under variable field conditions to...
Microtremor array method using spatial autocorrelation analysis of Rayleigh‑wave data
Koichi Hayashi, Michael W. Asten, William J. Stephenson, Cecile Cornou, Manuel Hobiger, Marco Pilz, Hiroaki Yamanaka
2022, Journal of Seismology
Microtremor array measurements (MAM) and passive surface wave methods in general, have been increasingly used to non-invasively estimate shear-wave velocity structures (Vs) for various purposes. The methods estimate dispersion curves and invert them for retrieving S-wave velocity profiles. This paper summarizes principles, limitations, data collection and processing methods. It intends...
Statewide quantitative microbial risk assessment for waterborne viruses, bacteria, and protozoa in public water supply wells in Minnesota
Tucker R. Burch, Joel P. Stokdyk, Nancy Rice, Anita C. Anderson, James F. Walsh, Sue Spencer, Aaron D. Firnstahl, Mark A. Borchardt
2022, Environmental Science & Technology (56) 6315-6324
Infection risk from waterborne pathogens can be estimated via quantitative microbial risk assessment (QMRA) and forms an important consideration in the management of public groundwater systems. However, few groundwater QMRAs use site-specific hazard identification and exposure assessment, so prevailing risks in these systems remain poorly defined. We estimated the...
Laboratory simulation of groundwater along uranium-mining-affected flow paths near the Grand Canyon, Arizona, USA
Carleton R. Bern, Kate M. Campbell, Katherine Walton-Day, Bradley S. Van Gosen
2022, Mine Water and the Environment (41) 370-386
Mining of volumetrically small, but relatively enriched (average 0.6% U3O8) breccia pipe uranium (BPU) deposits near the Grand Canyon, Arizona, USA has the potential to affect groundwater and springs in the area. Such deposits also contain base metal sulfides that can oxidize to generate acid mine...
Major point and nonpoint sources of nutrient pollution to surface water have declined throughout the Chesapeake Bay watershed
Robert D. Sabo, Breck Maura Sullivan, Cuiyin Wu, Emily M. Trentacoste, Qian Zhang, Gary W. Shenk, Gopal Bhatt, Lewis C. Linker
2022, Environmental Research Communications (4)
Understanding drivers of water quality in local watersheds is the first step for implementing targeted restoration practices. Nutrient inventories can inform water quality management decisions by identifying shifts in nitrogen (N) and phosphorus (P) balances over space and time while also keeping track of the likely urban...
Movement and habitat use by smallmouth bass Micropterus dolomieu velox in a dynamic Ozark Highlands riverscape
Andrew D. Miller, Shannon K. Brewer
2022, Journal of Fish Biology (101) 100-114
Stream fish movement in response to changing resource availability and habitat needs is important for fish growth, survival and reproduction. The authors used radio telemetry to evaluate individual movements, daily movement rates, home ranges and habitat-use characteristics of adult (278–464 mm LT) Neosho smallmouth bass Micropterus dolomieu velox in three Ozark Highlands streams from...
Structured elicitation of expert judgement in real-time eruption scenarios: An exercise for Piton de la Fournaise volcano, La Réunion island
Alessandro Tadini, Andrew J. L. Harris, Julie Morin, Andrea Bevilacqua, Aline Peltier, Willy Aspinall, Stefano Ciolli, Patrick Bachelery, Benjamin Bernard, Jonas Biren, Antonio Brum da Silveira, Valery Cayol, Oryaelle Chevrel, Diego Coppola, Hannah R. Dietterich, Amy Donovan, Olaya Dorado, Stephane Drenne, Olivier Dupere, Lucia Gurioli, Stephan Kolzenburg, Jean-Christophe Komorowski, Philippe Labazuy, Domenico Mangione, Stefano Mannini, Francois Martel-Asselin, Etienne Medard, Sophie Pailot-Bonnetat, Victoria Rafflin, Michael Ramsey, Nicole Richter, Silvia Vallejo-Vargas, Nicolas Villeneuve, Silvia Zafrilla
2022, Volcanica (5) 105-131
Formalised elicitation of expert judgements has been used to help tackle several problematic societal issues, including volcanic crises and pandemic threats. We present an expert elicitation exercise for Piton de la Fournaise volcano, La Réunion island, held remotely in April 2021. This involved 28 experts from nine countries who considered a hypothetical effusive...
Invasion of annual grasses following wildfire corresponds to maladaptive habitat selection by a sagebrush ecosystem indicator species
Brianne E. Brussee, Peter S. Coates, Shawn T. O’Neil, Michael L. Casazza, Shawn P. Espinosa, John D. Boone, Elisabeth M. Ammon, Scott C. Gardner, David J. Delehanty
2022, Global Ecology and Conservation (37)
Numerous wildlife species within semi-arid shrubland ecosystems across western North America are experiencing substantial habitat loss and fragmentation. These changes in habitat are often attributed to a diverse suite of factors including prolonged and increasingly severe droughts, conifer expansion, anthropogenic...
Hydroclimate response of spring ecosystems to a two-stage Younger Dryas event in western North America
Jeffrey S. Pigati, Kathleen B. Springer
2022, Scientific Reports (12)
The Younger Dryas (YD) climate event is the preeminent example of abrupt climate change in the recent geologic past. Climate conditions during the YD were spatially complex, and high-resolution sediment cores in the North Atlantic, western Europe, and East Asia have revealed it unfolded in two distinct stages, including an...
Supporting the development and use of native plant materials for restoration on the Colorado Plateau (Fiscal Year 2021 Report)
Robert Massatti, Daniel E. Winkler, Sasha C. Reed, Michael C. Duniway, Seth M. Munson, John B. Bradford
2022, Report
A primary focus of the Colorado Plateau Native Plant Program (CPNPP) is to identify and develop appropriate native plant materials (NPMs) for current and future restoration projects. Multiple efforts have characterized the myriad challenges inherent in providing appropriate seed resources to enable effective, widespread restoration and have identified a broad...
High‐frequency rupture processes of the 2014 Mw 8.2 Iquique and 2015 Mw 8.3 Illapel, Chile, earthquakes determined from strong‐motion recordings
Arthur D. Frankel
2022, Bulletin of the Seismological Society of America (112) 1832-1852
Strong‐motion recordings of the 2014 Mw">MwMw 8.2 Iquique and 2015 Mw">MwMw 8.3 Illapel, Chile, earthquakes were...
Accounting for residual heterogeneity in double-observer sightability models decreases bias in burro abundance estimates
Jacob Daniel Hennig, Kathryn A. Schoenecker, James W. Cain III, Gary W. Roemer, Jeffrey L. Laake
2022, Journal of Wildlife Management (86)
Feral burros (Equus asinus) and horses (E. ferus caballus) inhabiting public land in the western United States are intended to be managed at population levels established to promote a thriving, natural ecological balance. Double-observer sightability (MDS) models, which use detection records from multiple observers...
A future for the inland fish and fisheries hidden within the sustainable development goals
Vittoria Elliott, Abigail Lynch, Sui C. Phang, Steve J. Cooke, Ian. G. Cowx, Julie E. Claussen, James Dalton, William Darwall, Ian Harrison, Karen J. Murchie, E. Ashley Steel, Gretchen L. Stokes
2022, Frontiers in Environmental Science (10)
The United Nations Sustainable Development Goals (SDGs) are a unifying call for change - guiding global actions at multiple levels of governance for a better planet and better lives. Consequently, achieving the “future we want” may be hindered by overlooking valuable natural resources and services that are not...
U.S. Geological Survey Hydrologic Toolbox — A graphical and mapping interface for analysis of hydrologic data
Paul M. Barlow, Amy R. McHugh, Julie E. Kiang, Tong Zhai, Paul Hummel, Paul Duda, Scott Hinz
2022, Techniques and Methods 4-D3
The Hydrologic Toolbox is a Windows-based desktop software program that provides a graphical and mapping interface for analysis of hydrologic time-series data with a set of widely used and standardized computational methods. The software combines the analytical and statistical functionality provided in the U.S. Geological Survey Groundwater and Surface-Water Toolboxes...
Hawaii and Landsat
U.S. Geological Survey
2022, Fact Sheet 2022-3024
Hawaii stands apart from the rest of the United States, literally and figuratively. The nearest of the eight islands that make up the Hawaiian archipelago is 2,000 miles from the U.S. mainland. Like every bit of land mass within the State, it emerged from the Pacific Ocean after thousands of...
