Publications
Browse more than 160,000 publications authored by our scientists over the past 100+ year history of the USGS. Publications available are: USGS-authored journal articles, series reports, book chapters, other government publications, and more.
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Comparison of measured versus modeled TOC in the Tuscaloosa marine shale of Southwestern Mississippi, U.S.A. Comparison of measured versus modeled TOC in the Tuscaloosa marine shale of Southwestern Mississippi, U.S.A.
This study presents a comparison of measured versus modeled total organic carbon (TOC) in the Upper Cretaceous Tuscaloosa marine shale (TMS) of southwestern Mississippi as a case study to evaluate the effects of mineralogy on the TOC estimated from the ΔlogR method. The ΔlogR method is utilized to calculate TOC, which involves baselining sonic transit time and resistivity log curves in a...
Authors
Celeste D. Lohr, Matthew D. Merrill
Food, water quality, and the growth of a freshwater mussel: Implications for population restoration Food, water quality, and the growth of a freshwater mussel: Implications for population restoration
Unknown causes behind the loss of freshwater mussel populations have prompted population restoration as a tool to recover these imperiled species. However, water quality conditions that support mussel species within natural environments and potential causes of water quality impairment in systems with declining populations are typically unknown and may be critical knowledge needed before
Authors
Ayla J. Skorupa, Allison H. Roy, Peter D. Hazelton, David Perkins, Timothy Timothy Warren, Brian S. Cheng
Mesoproterozoic to Paleozoic tectonics, Pleistocene landforms, and Holocene seismicity in the Blue Ridge: Results from integrated studies of the 9 August 2020, Mw 5.1 earthquake area near Sparta, North Carolina, USA Mesoproterozoic to Paleozoic tectonics, Pleistocene landforms, and Holocene seismicity in the Blue Ridge: Results from integrated studies of the 9 August 2020, Mw 5.1 earthquake area near Sparta, North Carolina, USA
This field trip examines the results of integrated geologic studies of the 9 August 2020, Mw 5.1 earthquake near Sparta, North Carolina, USA. The earthquake generated ~4 km of coseismic surface rupture of the Little River fault and uplifted a surface area of ~11 km 2. The Little River fault is a thrust fault oriented 110–130°/45–70°SW, and mapped fault segments are en echelon with scarp...
Authors
Arthur J. Merschat, Mark W. Carter, Ashley S. Lynn, Kevin G. Stewart, Paula Figueiredo, William E. Odom, Ryan J. McAleer, Jorge A. Vazquez, Nicholas Edwin Powell, Christopher S. Holm-Denoma
Morbidity in California giant salamander (Dicamptodon ensatus Eschscholtz, 1833) caused by Euryhelmis sp. Poche, 1926 (Trematoda: Heterophyiidae) Morbidity in California giant salamander (Dicamptodon ensatus Eschscholtz, 1833) caused by Euryhelmis sp. Poche, 1926 (Trematoda: Heterophyiidae)
In the fall of 2021, California Department of Fish and Wildlife reported larval and adult California giant salamanders (Dicamptodon ensatus Eschscholtz, 1833) with skin lesions at multiple creeks in Santa Clara and Santa Cruz Counties, California, USA. Field signs in both stages included rough, lumpy textured skin, and larvae with tails that were disproportionately long, flat, wavy, and...
Authors
Jaimie L. Miller, Lawrence Erickson, Susanne Fork, Constance Roderick, Daniel A. Grear, Rebecca A. Cole
Using structured decision making to assess management alternatives to inform the 2024 update of the Minnesota Invasive Carp Action Plan Using structured decision making to assess management alternatives to inform the 2024 update of the Minnesota Invasive Carp Action Plan
This report summarizes the results of a structured decision making process started by the Minnesota Department of Natural Resources to develop and evaluate various invasive carp management strategies to inform a 2024 update of the Minnesota Invasive Carp Action Plan. The Minnesota Department of Natural Resources invited State, Federal, Tribal, and nongovernmental organization partners to
Authors
Max Post van der Burg, Michael E. Colvin
Spatial, seasonal, and diel controls of nitrogen-carbon-oxygen cycling during lake-water infiltration to an aquifer Spatial, seasonal, and diel controls of nitrogen-carbon-oxygen cycling during lake-water infiltration to an aquifer
Many freshwater lakes are groundwater flow-through systems. Although lakes commonly are considered to be sinks for nitrogen inputs, relatively little is known about carbon and nitrogen export from lakes to groundwater. The current study focused on lake-bottom biogeochemical processes accompanying the transport of nitrogen, dissolved oxygen (O2), and dissolved organic carbon (DOC) during...
Authors
Richard L. Smith, Deborah A. Repert, Jennifer C. Underwood, J.K. Bohlke, Denis R. LeBlanc, Robert B. Hull, Douglas B. Kent, Ariel Reed, Stanley J. Mroczkowski
Tracking data highlight the importance of human-induced mortality for large migratory birds at a flyway scale Tracking data highlight the importance of human-induced mortality for large migratory birds at a flyway scale
Human-induced direct mortality affects huge numbers of birds each year, threatening hundreds of species worldwide. Tracking technologies can be an important tool to investigate temporal and spatial patterns of bird mortality as well as their drivers. We compiled 1704 mortality records from tracking studies across the African-Eurasian flyway for 45 species, including raptors, storks, and...
Authors
Juan Serratosa, Steffen Oppel, Andrea Santangeli, Shay Rotics, Stuart H. M. Butchart, Luis S. Cano-Alonso, Jose Luis Telleria, Ryno Kemp, Aaron Nicholas, Aigars Kalvansj, Aitor Galarza, Aldina M. A. Franco, Alessandro Andreotti, Alexander N.G. Kirschel, Alex Ngari, Alvaro Soutullo, Ana Bermejo-Bermejo, Andre J Botha, Andrea Ferri, Angelos Evangelidis, Anna Cenerini, Anton Stamenov, Antonio Hernandez-Matias, Arianna Aradis, Atanas P Grozdanov, Beneharo Rodriguez, Cagan H. Sekercioglu, Catuxa Cerecedo-Iglesias, Christina Kassara, Christos Barboutis, Claire Bracebridge, Clara Garcia-Ripolles, Corinne J. Kendall, Damijan Denac, Dana G. Schabo, David R Barber, Dimitar V Popov, Dobromir D Dobrev, Egidio Mallia, Elena Kmetova-Biro, Ernesto Alvarez, Evan R Buechly, Evgeny A. Bragin, Fabrizio Cordischi, Fadzai Zengeya, Flavio Monti, Francois Mougeot, Gareth Tate, Georgi Stoyanov, Giacomo Dell'Omo, Giuseppe Lucia, Gradimir Gradev, Guido Ceccolini, Guilad Friedemann, Hans-Gunther Bauer, Holger Kolberg, Hristo Peshev, Ines Catry, Ingar J. Oien, Isidoro Carbonell Alanis, Ivan Literak, Ivan Pokrovsky, Ivar Ojaste, Jan E. Ostnes, Javier de la Puente, Joan Real, Joao L. Guilherme, Jose C. Gonzalez, Jose M. Fernandez-Garcia, Juan Antonio Gil, Julien Terraube, Karel Poprach, Karen Aghababyan, Katharina Klein, Keith L. Bildstein, Kerri Wolter, Kjell Janssens, Kyle D. Kittelberger, Lindy J. Thompson, Mansoor H. AlJahdhami, Manuel Galan, Marcin Tobolka, Mario Posillico, Mario Cipollone, Marion Gschweng, Maris Strazds, Mark Boorman, Mark Zvidzai, Marta Acacio, Marta Romero, Martin Wikelski, Matthias Schmidt, Maurizio Sara, Michael J. McGrady, Mindaugas Dagys, Monique L. Mackenzie, Muna Al Taq, Msafiri P. Mgumba, Munir Z. Virani, Nicolaos I. Kassinis, Nicolo Borgianni, Nikki Thie, Nikos Tsiopelas, Nili Anglister, Nina Farwig, Nir Sapir, Oddmund Kleven, Oliver Krone, Olivier Duriez, Orr Spiegel, Osama Al Nouri, Pascual Lopez-Lopez, Patrik Byholm, Pauline L. Kamath, Pawel Mirski, Peter Palatitz, Pietro Serroni, Rainer Raab, Ralph Buij, Ramūnas Žydelis, Ran Nathan, Rauri C.K. Bowie, Rigas Tsiakiris, Richard Stratton Hatfield, Roi Harel, Rolf T. Kroglund, Ron Efrat, Ruben Liminana, Salim Javed, Sasa P. Marinkovic, Sascha Rösner, Sasha Pekarsky, Shiv R. Kapila, Simeon A. Marin, Simon Krejci, Sinos Giokas, Siranush Tumanyan, Sondra Turjeman, Sonja C. Kruger, Steven R. Ewing, Stoycho Stoychev, Stoyan C. Nikolov, Tareq E. Qaneer, Theresa Spatz, Thomas G. Hadjikyriakou, Thomas Mueller, Todd E. Katzner, Tomas Aarvak, Tomas Veselovsky, Torgeir Nygard, Ugo Mellone, Ulo Vali, Urmas Sellis, Vicente Urios, Vladimir Nemcek, Volen Arkumarev, Wayne M. Getz, Wolfgang Fiedler, Willem Van den Bossche, Yael Lehnardt, Victoria R. Jones
Carbon dioxide toxicity to zebra mussels (Dreissena polymorpha) is dependent on water chemistry Carbon dioxide toxicity to zebra mussels (Dreissena polymorpha) is dependent on water chemistry
Carbon dioxide (CO2) is gaining interest as a tool to combat aquatic invasive species, including zebra mussels (Dreissena polymorpha). However, the effects of water chemistry on CO2 efficacy are not well described. We conducted five trials in which we exposed adult zebra mussels to a range of CO2 in water with adjusted total hardness and specific conductance. We compared dose–responses...
Authors
Matthew T. Barbour, Matthew Meulemans, Todd J. Severson, Jeremy K. Wise, Diane L. Waller
Variability in coastal habitat available for Longfin Smelt Spirinchus thaleichthys in the northeastern Pacific Ocean Variability in coastal habitat available for Longfin Smelt Spirinchus thaleichthys in the northeastern Pacific Ocean
An understanding of oceanographic conditions and processes important to marine animal ecology is fundamental to the development of effective management and conservation actions. Longfin Smelt (Spirinchus thaleichthys) is a pelagic forage fish found in coastal and estuarine waters along the Pacific coast of North America from Alaska to central California. Substantial population declines...
Authors
Matthew J. Young, Frederick V. Feyrer, Steven T Lindley, David D. Huff
Deep learning of estuary salinity dynamics is physically accurate at a fraction of hydrodynamic model computational cost Deep learning of estuary salinity dynamics is physically accurate at a fraction of hydrodynamic model computational cost
Salinity dynamics in the Delaware Bay estuary are a critical water quality concern as elevated salinity can damage infrastructure and threaten drinking water supplies. Current state-of-the-art modeling approaches use hydrodynamic models, which can produce accurate results but are limited by significant computational costs. We developed a machine learning (ML) model to predict the 250 mg...
Authors
Galen Gorski, Salme Ellen Cook, Amelia Marie Snyder, Alison P. Appling, Theodore Paul Thompson, Jared David Smith, John C. Warner, Simon Nemer Topp
Groundwater and surface-water interactions in the He‘eia watershed, O‘ahu, Hawai‘i—Insights from analysis of historical data and numerical groundwater-model simulations Groundwater and surface-water interactions in the He‘eia watershed, O‘ahu, Hawai‘i—Insights from analysis of historical data and numerical groundwater-model simulations
He‘eia and ‘Ioleka‘a Streams in the He‘eia watershed on O‘ahu, Hawai‘i, receive substantial discharge from dike-impounded groundwater. Previous studies indicated that groundwater withdrawals from the watershed affect streamflow. Resource managers and users seek information that can be used to balance the needs of competing uses of groundwater and streamflow in the watershed. In this...
Authors
Scot K. Izuka, Heidi L. Kane, Kolja Rotzoll
Existing evidence on the effects of climate variability and climate change on ungulates in North America: A systematic map Existing evidence on the effects of climate variability and climate change on ungulates in North America: A systematic map
Background Climate is an important driver of ungulate life-histories, population dynamics, and migratory behaviors. Climate conditions can directly impact ungulates via changes in the costs of thermoregulation and locomotion, or indirectly, via changes in habitat and forage availability, predation, and species interactions. Many studies have documented the effects of climate variability...
Authors
Kate Malpeli, Sarah C. Endyke, Sarah R. Weiskopf, Laura Thompson, Ciara G. Johnson, Katherine Anne Kurth, Maxfield A. Carlin