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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Hawaiian waterbird movement across a developed landscape Hawaiian waterbird movement across a developed landscape
A key component for biologists managing mobile species is understanding where and when a species occurs at different locations and scaling management to fit the spatial and temporal patterns of movement. We established an automated radio-telemetry tracking network to document multi-year movement in 2016–2018 of 3 endangered waterbirds among wetlands on Oʻahu, Hawaiʻi, USA: ʻalae ʻula or...
Authors
Eben H. Paxton, Kristina L. Paxton, Martha Kawasaki, P. Marcos Gorresen, Charles B. van Rees, Jared G. Underwood
Piñon and juniper tree removal increases available soil water, driving understory response in a sage-steppe ecosystem Piñon and juniper tree removal increases available soil water, driving understory response in a sage-steppe ecosystem
Over the past century, piñon and juniper trees have encroached into sagebrush steppe lands of the interior United States, and managers have for many years removed trees to stimulate the favored understory. While consistent understory response to tree removal in these semiarid lands suggests that trees outcompete other plants for water, no studies have linked increased soil water to...
Authors
James D. McIver, James Grace, Bruce A. Roundy
Vein-type gold formation during late extensional collapse of the Eastern Desert, Egypt: the Gidami deposit Vein-type gold formation during late extensional collapse of the Eastern Desert, Egypt: the Gidami deposit
Orogenic gold deposits, though construed to focused fluid flow during orogenesis, commonly post-date the main accretionary events. Several lines of evidence indicate that orogenic gold formation in the Arabian–Nubian Shield continued through the orogen collapse stage and associated rapid exhumation and thermal re-equilibration. The Gidami gold deposit in the Eastern Desert of Egypt is...
Authors
Basem Zoheir, Ryan J. McAleer, Matthew Steele-MacInnis, Armin Zeh, Wyatt M. Bain, Spencer Poulette
Addressing detection uncertainty in Bombus affinis (Hymenoptera: Apidae) surveys can improve inferences made from monitoring Addressing detection uncertainty in Bombus affinis (Hymenoptera: Apidae) surveys can improve inferences made from monitoring
The U.S. Fish and Wildlife Service developed national guidelines to track species recovery of the endangered rusty patched bumble bee [Bombus affinis Cresson (Hymenoptera: Apidae)] and to investigate changes in species occupancy across space and time. As with other native bee monitoring efforts, managers have specifically acknowledged the need to address species detection uncertainty and...
Authors
Clint Otto, Alma Schrage, Larissa L. Bailey, John Michael Mola, Tamara A. Smith, Ian Pearse, Stacy C. Simanonok, Ralph Grundel
Density surface and excursion sets modeling as an approach to estimating population densities Density surface and excursion sets modeling as an approach to estimating population densities
Effective species management and conservation require knowledge of species distribution and status. We used point-transect distance sampling surveys of the endangered palila (Loxioides bailleui), a honeycreeper currently found only on the Island of Hawai'i, USA, to generate robust estimates of total abundance and simultaneously model the distribution, abundance, and spatial correlation...
Authors
Richard J. Camp, Chauncey K. Asing, Paul C. Banko, Lainie Berry, Kevin W. Brinck, Chris Farmer, Ayesha Genz
Geophysical data provide three dimensional insights into porphyry copper systems in the Silverton caldera, Colorado, USA Geophysical data provide three dimensional insights into porphyry copper systems in the Silverton caldera, Colorado, USA
The Silverton caldera in southwest Colorado, USA hosts polymetallic veins and pervasively altered rocks indicative of porphyry copper systems. Nearly a kilometer of erosion has exposed multiple levels of the hydrothermal systems from shallow lithocaps down to quartz-sericite-pyrite veins. New airborne electromagnetic and magnetic survey data are integrated with previous alteration...
Authors
Eric D. Anderson, Douglas Yager, Maria Deszcz-Pan, Bennett Eugene Hoogenboom, Brian D. Rodriguez, Bruce Smith
Impact of SARS-CoV-2 vaccination of children ages 5–11 years on COVID-19 disease burden and resilience to new variants in the United States, November 2021–March 2022: A multi-model study Impact of SARS-CoV-2 vaccination of children ages 5–11 years on COVID-19 disease burden and resilience to new variants in the United States, November 2021–March 2022: A multi-model study
Background The COVID-19 Scenario Modeling Hub convened nine modeling teams to project the impact of expanding SARS-CoV-2 vaccination to children aged 5–11 years on COVID-19 burden and resilience against variant strains.Methods Teams contributed state- and national-level weekly projections of cases, hospitalizations, and deaths in the United States from September 12, 2021 to March 12...
Authors
Rebecca K. Borchering, Luke C Mullany, Emily Howerton, Matteo Chinazzi, Claire P. Smith, Michelle Qin, Nicholas G. Reich, Lucie Contamin, John Levander, J. Kerr, J. Espino, Harry Hochheiser, Kaitlin Lovett, Matt Kinsey, Kate Tallaksen, Shelby Wilson, Lauren Shin, Joseph Lemaitre, Juan Dent Hulse, Joshua Kaminsky, Elizabeth C. Lee, Alison Hill, Jessica Davis, Kunpeng Mu, Xinyue Xiong, Ana Pastore y Piontti, Alessandro Vespignani, Ajitesh Srivastava, Przemyslaw Porebski, Srini Venkatramanan, Aniruddha Adiga, Bryan Lewis, Brian Klahn, Joseph Outten, Benjamin Hurt, Jiangzhuo Chen, Henning Mortveit, Amanda Wilson, Madhav Marathe, Stefan Hoops, Parantapa Bhattacharya, Dustin Machi, Shi Chen, Rajib Paul, Daniel Janies, Jean-Claude Thill, Marta Galanti, Teresa Yamana, Sen Pei, Jeffrey L. Shaman, Guido Espana, Sean Cavany, Sean Moore, Alex Perkins, Jessica Healy, Rachel B. Slayton, Michael A Johansson, Matthew Biggerstaff, Katriona Shea, Shaun Truelove, Michael C. Runge, Cecile Viboud, Justin Lessler
Automatic recorders monitor wolves at rendezvous sites: do wolves adjust howling to live near humans? Automatic recorders monitor wolves at rendezvous sites: do wolves adjust howling to live near humans?
We used automatic sound recorders to study spontaneous vocalizations of wild wolves during the pup-rearing season around rendezvous sites from 24 wolf packs in six study areas across North America, Asia, and Europe. Between 2018 and 2021, for a total of 1225 pack-days, we recorded 605 spontaneous wolf chorus howls and 224 solo-howl series. Howling occurrence varied across areas, from 12...
Authors
Vicente Palacios, Barbara Marti-Domken, Shannon Barber-Meyer, Bilal Habib, Jose Vicente Lopez-Bao, Douglas W. Smith, Daniel R. Stahler, Emilio Jose Garcia, Victor Sazatornil, L. David Mech
A near four-decade time series shows the Hawaiian Islands have been browning since the 1980s A near four-decade time series shows the Hawaiian Islands have been browning since the 1980s
The Hawaiian Islands have been identified as a global biodiversity hotspot. We examine the Normalized Difference Vegetation Index (NDVI) using Climate Data Records products (0.05 × 0.05°) to identify significant differences in NDVI between neutral El Niño-Southern Oscillation years (1984, 2019) and significant long-term changes over the entire time series (1982–2019) for the Hawaiian...
Authors
Austin Madson, Monica Dimson, Lucas Fortini, Kapua Kawelo, Tamara Tickin, Matt Keir, Chunyu Dong, Zhimin Ma, David W Beilman, Kelly Kay, Jonathan Pando Ocon, Erica Gallerani, Stephanie Pau, Thomas W Gillespie
Comparative assessment of laboratory-derived thermal maxima of Gila trout (oncorhynchus Gilae) with current stream temperatures Comparative assessment of laboratory-derived thermal maxima of Gila trout (oncorhynchus Gilae) with current stream temperatures
Gila trout (Oncorhynchus gilae) represent an iconic species of the American Southwest. The salmonid has survived extensive logging, livestock grazing, and mining, and is currently threatened by climate change, wildfire, and extended drought. Long-term conservation and recovery of the species and its unique lineages rely on stocking and translocation into historically inhabited streams...
Authors
Tyler J. Wallin, Colleen A. Caldwell
Assessment of undiscovered conventional oil and gas resources of the Senegal Basin Province of northwest Africa, 2021 Assessment of undiscovered conventional oil and gas resources of the Senegal Basin Province of northwest Africa, 2021
Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean resources of 13,929 million (13.9 billion) barrels of oil and 193,721 billion (193.7 trillion) cubic feet of gas within the Senegal Basin Province of northwest Africa.
Authors
Christopher J. Schenk, Tracey J. Mercier, Cheryl A. Woodall, Phuong A. Le, Andrea D. Cicero, Ronald M. Drake, Geoffrey S. Ellis, Thomas M. Finn, Michael H. Gardner, Sarah E. Gelman, Jane S. Hearon, Benjamin G. Johnson, Jenny H. Lagesse, Heidi M. Leathers-Miller, Kristen R. Marra, Kira K. Timm, Scott S. Young
Accounting for spatial heterogeneity in visual obstruction in line-transect distance sampling of gopher tortoises Accounting for spatial heterogeneity in visual obstruction in line-transect distance sampling of gopher tortoises
Line-transect distance sampling (LTDS) surveys are commonly used to estimate abundance of animals or objects. In terrestrial LTDS surveys of gopher tortoise (Gopherus polyphemus) burrows, the presence of ground-level vegetation substantially decreases detection of burrows of all sizes, but no field or analytical methods exist to control for spatially heterogeneous vegetation obstruction...
Authors
Heather E. Gaya, Lora L. Smith, Clinton T. Moore