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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Paleomagnetically defined brief lifespans for two large shield volcanoes in the Cascades Arc
Mafic to intermediate shield volcanoes with multi-cubic-kilometer eruptive volumes are common in the Cascades Volcanic Arc, but little is known about their eruptive histories as either singular or sustained episodes, or the total time required for their construction. Paleomagnetic data were collected from the lava flows of Ash Creek Butte (17 sites) and Crater Mountain (14 sites) in northern Calif
Authors
Anthony Francis Pivarunas, Dawnika Blatter, L. J. Patrick Muffler, Michael A. Clynne, Andrew T. Calvert, Lauren N Harrison, R.L. Christiansen
Ages of the granitic basement of Long Valley Caldera, California, USA, and siting of the Quaternary granite-rhyolite pluton
The leucogranitic crystal-mush pluton beneath the iconic Long Valley Caldera, California, USA, released >820 km3 of crystal-poor Pleistocene rhyolite, which was hosted by numerous Mesozoic granitic plutons, only a few of which had been dated until now. Reported here are U-Pb zircon ages, determined by sensitive high-resolution ion microprobe−reverse geometry (SHRIMP-RG), for 11 circumcaldera grani
Authors
Edward Hildreth, Judith E. Fierstein, Jorge A. Vazquez
Multi-scale effects of land cover, weather, and fire on Columbian sharp-tailed grouse
Columbian sharp-tailed grouse (Tympanuchus phasianellus columbianus) are endemic to grassland and shrub-steppe ecosystems of western North America, yet their distribution has contracted to <10% of their historical range. Primary threats to Columbian sharp-tailed grouse include loss of native habitat and conversion to agriculture, reductions in habitat once provided by the Conservation Reserve Prog
Authors
Bryan S. Stevens, Courtney J. Conway, Jeffrey M. Knetter, Shane B. Roberts, Patrick Donnelly
Aerial application of organic pellets eliminates Lake Trout recruitment from a primary spawning reef in Yellowstone Lake
Invasive Lake Trout Salvelinus namaycush in the Yellowstone Lake ecosystem have been gillnetted since 1995 to suppress the population and allow for recovery of native Yellowstone Cutthroat Trout Oncorhynchus clarkii bouvieri. Although gillnetting is effective (Lake Trout population growth rate λ ≤ 0.6 during 2012–2022), the effort only targets free-swimming, age-2 and older Lake Trout. We develope
Authors
Todd M. Koel, Philip D. Doepke, Drew J. MacDonald, Nathan A. Thomas, Cody W. Vender, Hayley C. Glassic, Alex S. Poole, Christopher S. Guy, Alexander V. Zale
Differential shortstopping behaviour in Whooping Cranes: Habitat or social learning?
Many migratory bird species have begun shifting their wintering grounds closer to their breeding grounds, shortening their yearly migration distance through a behavior called shortstopping. While multiple studies have investigated possible drivers, it remains unclear why only some populations adopt this behavior.We studied the differential occurrence of shortstopping in two populations of Whooping
Authors
Philipp Mendgen, Sarah J. Converse, Aaron T. Pearse, Claire S. Teitelbaum, Thomas Mueller
Simulating post-dam removal effects of hatchery operations and disease on juvenile Chinook salmon (Oncorhynchus tshawytscha) production in the Lower Klamath River, California
Executive SummaryThe Federal Energy Regulatory Commission has been considering the approval to breach four dams on lower Klamath River in southern Oregon and northern California. Approval of this application would allow for Strikeouts indicate text deletion hereafter. decommissioning and dam removal, beginning as early as 2023. This action would affect Klamath River salmon (Oncorhynchus ssp.) popu
Authors
Russell W. Perry, John M. Plumb, Michael J. Dodrill, Nicholas A. Som, H. Eve Robinson, Nicholas J. Hetrick
Quality of groundwater used for domestic supply in the Modesto, Turlock, and Merced Subbasins of the San Joaquin Valley, California
Summary More than 2 million Californians rely on groundwater from privately owned domestic wells for drinking-water supply. This report summarizes a water-quality survey of domestic and small-system drinking-water supply wells in the Modesto, Turlock, and Merced subbasins of the San Joaquin Valley where more than 78,000 residents are estimated to use privately owned domestic wells. Results indicat
Authors
Zeno F. Levy, Mariia Balkan, Jennifer L. Shelton
Vertical transmission of Renibacterium salmoninarum in cutthroat trout (Oncorhynchus clarkii)
Vertical transmission of Renibacterium salmoninarum has been well-documented in anadromous salmonids but not in hatchery-reared inland trout. We assessed whether the bacterium is vertically transmitted in cutthroat trout (Oncorhynchus clarkii) from a Colorado, USA hatchery, and assessed the rate of transmission from male and female brood fish. Adult brood fish were killed, tested for R. salmoninar
Authors
Tawni B. Riepe, Eric R. Fetherman, Brad Neuschwanger, Tracy Davis, Andrew Perkins, Dana L. Winkelman
Skinks of Oceania, New Guinea, and Eastern Wallacea: An underexplored biodiversity hotspot
Context: Skinks comprise the dominant component of the terrestrial vertebrate fauna in Oceania, New Guinea, and Eastern Wallacea (ONGEW). However, knowledge of their diversity is incomplete, and their conservation needs are poorly understood.Aims: To explore the diversity and threat status of the skinks of ONGEW and identify knowledge gaps and conservation needs.Methods: We compiled a list of all
Authors
Alex Slavenko, Allen Allison, Christopher C. Austin, Aaron Bauer, Rafe M. Brown, Robert N. Fisher, Ivan Ineich, Bulisa Iova, Benjamin R. Karin, Frederick Kraus, Sven Mecke, Shai Meiri, Clare Morrison, Paul M. Oliver, Mark O'Shea, Jonathan Q. Richmond, Glenn M. Shea, Oliver J. S. Tallowin, David G. Chapple
Out of the frying pan and into the fire: Effects of volcanic heat and other stressors on the conservation of a critically endangered plant in Hawaiʻi
Loss of local biodiversity resulting from abrupt environmental change is a significant environmental problem throughout the world. Extinctions of plants are particularly important yet are often overlooked. Drawing from a case in Hawai‘i, a global hotspot for plant and other extinctions, we demonstrate an effort to better understand and determine priorities for the management of an endangered plant
Authors
Nathan S. Gill, Jeff Stallman, Linda Pratt, Jennifer L. Lewicki, Tamar Elias, Patricia Nadeau, Stephanie G. Yelenik
Round goby detection in Lakes Huron and Michigan— An evaluation of eDNA and fish catches
Aquatic surveys for fish in large water bodies (e.g., Laurentian Great Lakes of North America) often require a flexible approach using multiple methods, surveying different depths, and sampling across seasons, especially when the target species is elusive in its natural habitat. The round goby (Neogobius melanostomus) is an invasive, bottom-dwelling fish inhabiting rocky areas of all five Great La
Authors
Katarzyna Przybyla-Kelly, Ashley M. Spoljaric, Meredith B. Nevers
Comparison of community practitioner and clinical educator expectations of veterinary graduates
One goal of veterinary curricular development and revision is to ensure graduating veterinarians meet entry-level competencies to perform successfully in their community. Most curricula are developed by clinical educators in a university setting; therefore, we must determine whether clinical educators can predict community practitioner expectations. This article evaluates practitioners’ expectatio
Authors
Amy Nichelason, Nathan Roy Bollig, Tom Bach, Molly Harris, Peggy Schmidt