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The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
Browse more than 65,000 articles authored by our scientists over the past 100+ year history of the USGS and refine search by topic, location, year, and advanced search.
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Clarifying the role of the resist–accept–direct framework in supporting resource management planning processes
No abstract available.
Authors
Gregor W. Schuurman, Wylie Carr, Cat Hawkins Hoffman, David J. Lawrence, Brian W. Miller, Erik A. Beever, Jean Brennan, Katherine R. Clifford, Scott Covington, Shelley D. Crausbay, Amanda E. Cravens, John E. Gross, Linh Hoang, Stephen Jackson, Abraham J. Miller-Rushing, Wendy Morrison, Elizabeth A. Nelson, Robin O'Malley, Jay O. Peterson, Mark T. Porath, Karen Prentice, Joel H. Reynolds, Suresh A. Sethi, Helen Sofaer, Jennifer L. Wilkening
Kiloyear cycles of carbonate and Mg-silicate replacement at Von Damm hydrothermal vent field
The Von Damm vent field (VDVF) on the Mid-Cayman Rise in the Caribbean Sea is unique among modern hydrothermal systems in that the chimneys and mounds are almost entirely composed of talc. We analyzed samples collected in 2020 and report that in addition to disordered talc of variable crystallinity, carbonates are a major class of mineral at VDVF. The carbonate minerals include aragonite...
Authors
Amy Gartman, Terrence Blackburn, Kiana Frank, Susan Q. Lang, Jeffrey S. Seewald
Effects of riparian forest thinning on resident salmonid fishes in coastal northern California catchments
Resource managers are interested in whether thinning second-growth forests may be a viable restoration strategy for stream and riparian habitats, but may be concerned about the potential impacts that increases in stream temperature associated with riparian thinning treatments may have on cold-water salmonid fishes.We evaluated the effects of riparian forest thinning on resident...
Authors
David A. Roon, Jason B. Dunham, Joseph R. Benjamin, Bret C. Harvey, James R Bellmore
Are wildfire risk mitigators more prepared to evacuate? Insights from communities in the western United States
As the realized experiences of wildfires threatening communities increase, the importance of proactive evacuation preparation and wildfire risk mitigation on private property to reduce the loss of lives and property is shaping wildfire policy and programs. To date, research has focused on pre-wildfire evacuation preparation and risk mitigation independently. This paper examines the...
Authors
Grant Webster, Hannah Brenkert-Smith, Patricia A. Champ, James Meldrum, Kelly Wallace, Colleen Donovan, Carolyn Wagner, Christopher M. Barth, Josh Kuehn, Suzanne Wittenbrink, Christine Taniguchi
A review of standardization in Mississippi’s multidecadal inland fisheries monitoring program
Standardizing data collection, management, and analysis processes can improve the reliability and efficiency of fisheries monitoring programs, yet few studies have examined the operationalization of these tasks within agency settings. We reviewed the Mississippi Department of Wildlife, Fisheries, and Parks, Fisheries Bureau’s inland recreational fisheries monitoring program—a 30+-year...
Authors
Caleb A. Aldridge, Michael E. Colvin
Pre-restoration woody species crown and vegetation community mapping using high-resolution uncrewed aerial system imagery, Palmyra Atoll
The terrestrial management plan for Palmyra Atoll includes large-scale removal of coconut (Cocos nucifera) as part of native forest restoration and contaminant remediation that will leave soils and vegetation communities profoundly altered. To inform those efforts and provide baseline data for restoration monitoring, woody stem crowns and vegetation communities at Palmyra Atoll were...
Authors
Matthew Struckhoff
Remote sensing of river discharge based on critical flow theory
Critical flow theory provides a physical foundation for inferring discharge from measurements of wavelength and channel width made from images. In rivers with hydraulically steep local slopes greater than∼0.01, flow velocities are high and the Froude number F r (ratio of inertial to gravitational forces) can approach 1.0 (critical flow) or greater. Under these conditions, undular...
Authors
Carl J. Legleiter, Gordon E. Grant, Inhyeok Bae, Becky Fasth, Elowyn Yager, Daniel C. White, Laura A. Hempel, Merritt Elizabeth Harlan, Christina Leonard, Robert W. Dudley
Biocrust mosses and cyanobacteria exhibit distinct carbon uptake responses to variations in precipitation amount and frequency
Dryland organisms exhibit varied responses to changes in precipitation, including event size, frequency, and soil moisture duration, influencing carbon uptake and reserve management strategies. This principle, central to the pulse-reserve paradigm, has not been thoroughly evaluated in biological soil crusts (biocrusts), essential primary producers on dryland surfaces. We conducted two...
Authors
Kristina E. Young, Osvaldo E. Sala, Anthony Darrouzet-Nardi, Colin Tucker, Rebecca Finger-Higgens, Megan Elyse Starbuck, Sasha C. Reed
New technology for an ancient fish: A lamprey life cycle modeling tool with an R Shiny application
Lampreys (Petromyzontiformes) are an ancient group of fishes with complex life histories. We created a life cycle model that includes an R Shiny interactive web application interface to simulate abundance by life stage. This will allow scientists and managers to connect available demographic information in a framework that can be applied to questions regarding lamprey biology and...
Authors
Dylan Gerald-Everett Gomes, Joseph R. Benjamin, Benjamin J. Clemens, Ralph Lampman, Jason B. Dunham
Crustal to mantle melt storage during the evolution of Hawaiian volcanoes
As the Pacific Plate migrates over the mantle plume below Hawaiʻi, magma flux decreases, resulting in changes in eruptive volume, style, and composition. It is thought that melt storage becomes deeper and ephemeral with the transition from highly voluminous tholeiitic (shield stage) to the less voluminous alkaline (post-shield and rejuvenation stages) magmatism. To quantitatively test...
Authors
Esteban Gazel, Kyle Dayton, Wenwei Liang, Junlin Hua, Kendra J. Lynn, Julia E. Hammer
Flexible phenology of a C4 grass linked to resiliency to seasonal and multiyear drought events in the American southwest
Rising temperatures are predicted to further limit dryland water availability as droughts become more intense and frequent and seasonal precipitation patterns shift. Vegetation drought stress may increase mortality and cause declines and delays in phenological events, thereby impacting species' capacity to persist and recover from extreme drought conditions. We compare phenological...
Authors
Rebecca Finger-Higgens, David L. Hoover, Anna C. Knight, Daniel Rodolphe Schlaepfer, Michael C. Duniway
Paleo-scours within the layered sulfate-bearing unit at Gale crater, Mars: Evidence for intense wind erosion
The surface of modern Mars is largely shaped by wind, but the influence of past wind activity is less well constrained. Sedimentary rocks exposed in the lower foothills of Aeolis Mons, the central mound within Gale crater, record a transition from predominantly lacustrine deposition in the Murray formation to aeolian deposition in the Mirador formation. Here, we report a series of...
Authors
A.L. Roberts, S. Gupta, S.G. Banhan, A. Cowart, Lauren A. Edgar, W. Rapin, W.E. Dietrich, E.S. Kite, J.M. Davis, G. Caravaca, C.A. Mondro, P.J. Gasda, J.R. Johnson, S. Le Mouelic, D.M. Fey, A.B. Bryk, G. Paar, R.A. Harris, A. Fraeman, A.R. Vasavada