Articles
Science Quality and Integrity
The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
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.
Filter Total Items: 77863
Morbidity and mortality of Hawaiin geese (Branta sandvicensis) and Laysan albatross (Phoebastria immutabilis) associated with reticuloendotheliosis virus Morbidity and mortality of Hawaiin geese (Branta sandvicensis) and Laysan albatross (Phoebastria immutabilis) associated with reticuloendotheliosis virus
Only one virus, Avipox, has been documented previously in wild birds in Hawaii. Using immunohistochemistry and PCR, we found that two native threatened Hawaiian Geese (Branta sandvicensis), one with multicentric histiocytoma and the other with toxoplasmosis, and one Laysan Albatross (Phoebastria immutabilis) with avian pox were infected with reticuloendotheliosis virus (REV). The virus...
Authors
Thierry M. Work, Renee Breeden, Julie Dagenais, Robert Rameyer, Holly Sellers, S. Ip, James W. Casey
Evaluating hydrologic region assignment techniques for ungaged basins in Alaska, USA Evaluating hydrologic region assignment techniques for ungaged basins in Alaska, USA
Building continental-scale hydrologic models in data-sparse regions requires an understanding of spatial variation in hydrologic processes. Extending these models to ungaged locations requires techniques to group ungaged locations with gaged ones to make process importance and model parameter transfer decisions to ungaged locations. This analysis (1) tested the utility of fundamental...
Authors
Theodore B. Barnhart, William H. Farmer, John C. Hammond, Graham A. Sexstone, Janet H. Curran, Joshua C. Koch, Jessica M. Driscoll
Evidence gaps and diversity among potential win–win solutions for conservation and human infectious disease control Evidence gaps and diversity among potential win–win solutions for conservation and human infectious disease control
As sustainable development practitioners have worked to “ensure healthy lives and promote well-being for all” and “conserve life on land and below water”, what progress has been made with win–win interventions that reduce human infectious disease burdens while advancing conservation goals? Using a systematic literature review, we identified 46 proposed solutions, which we then...
Authors
Skylar R. Hopkins, Kevin D. Lafferty, Chelsea L. Wood, Sarah H Olson, Julia C Buck, Giulio A. De Leo, Kathryn Fiorella, Johanna Fornberg, Andres Garchitorena, Isabel J. Jones, Armand Kuris, Laura H Kwong, Christopher LeBoa, Ariel Elizabeth Leon, Andrea Lund, Andrew J MacDonald, Daniel Metz, Nicole Nova, Alison J. Peel, Justin V. Remais, Tara E. Stewart Merrill, Maya Wilson, Matthew Bonds, Andrew Dobson, David Lopez-Carr, Meghan Howard, Lisa Mandle, Susanne H. Sokolow
The Shallow Magmatic Plumbing System of the Deccan Traps, Evidence from Plagioclase Megacrysts and Their Host Lavas The Shallow Magmatic Plumbing System of the Deccan Traps, Evidence from Plagioclase Megacrysts and Their Host Lavas
We investigate the shallow plumbing system of the Deccan Traps Large Igneous Province using rock and mineral data from Giant Plagioclase Basalt (GPB) lava flows from around the entire province, but with a focus on the Saurashtra Peninsula, the Malwa Plateau, and the base and top of the Western Ghats (WG) lava pile. GPB lavas in the WG typically occur at the transition between chemically...
Authors
A. Marzoli, Paul R. Renne, R Andreasen, R Spiess, M Chiaradia, Dawn Catherine Sweeney Ruth, A.J. Tholt, K Pande, Fabio J. V. Costa
Juvenile salmon habitat use drives variation in growth and highlights vulnerability to river fragmentation Juvenile salmon habitat use drives variation in growth and highlights vulnerability to river fragmentation
Widespread stream network fragmentation from dams and culverts has altered habitat connectivity in river ecosystems and presents an acute threat to migratory fish. To support watershed management for an iconic migratory fish group, we assessed juvenile salmon growth outcomes across habitat use strategies and characterized how these life histories may be impacted by stream connectivity...
Authors
Suresh Sethi, Michael P. Carey, Jonathon Gerken, Bradley P. Harris, Nathan Wolf, Curry Cunningham, Felipe Restrepo, Josh Ashline
Future directions to manage wildlife health in a changing climate Future directions to manage wildlife health in a changing climate
In September 2019 The Economist wrote an obituary to Okjökull, a glacier in western Iceland that was declared “dead” in 2014, a victim of climate change. Although a few wildlife species have already incurred such a fate (e.g., the Bramble Cay melomys [Melomys rubicola]) (Fulton 2017), many more are on the path to climate-driven extinction (Andermann et al. 2020; Ceballos et al. 2015; He...
Authors
Erik K. Hofmeister, Emily Cornelius Ruhs, Lucas Berio Fortini, M. Camille Hopkins, Lee C. Jones, Kevin D. Lafferty, Jonathan M. Sleeman, Olivia E. LeDee
Predation thresholds for reintroduction of native avifauna following suppression of invasive brown treesnakes on Guam Predation thresholds for reintroduction of native avifauna following suppression of invasive brown treesnakes on Guam
The brown treesnake (BTS) (Boiga irregularis) invasion on Guåhan (in English, Guam) led to the extirpation of nearly all native forest birds. In recent years, methods have been developed to reduce BTS abundance on a landscape scale. To help assess the prospects for the successful reintroduction of native birds to Guåhan following BTS suppression, we modeled bird population persistence...
Authors
Robert McElderry, Eben H. Paxton, Andre Van Nguyen, Shane R. Siers
Reproducibility and variability of earthquake subsidence estimates from saltmarshes of a Cascadia estuary Reproducibility and variability of earthquake subsidence estimates from saltmarshes of a Cascadia estuary
We examine fossil foraminiferal assemblages from 20 sediment cores to assess sudden relative sea-level (RSL) changes across three mud-over-peat contacts at three salt marshes in northern Humboldt Bay, California (~44.8°N, -124.2°W). We use a validated foraminiferal-based Bayesian transfer function to evaluate the variability of subsidence stratigraphy at a range of 30-6000 m across an...
Authors
Jason Scott Padgett, Simon E. Engelhart, Harvey M. Kelsey, Robert C. Witter, Niamh Cahill
Hydrological and lock operation conditions associated with paddlefish and bigheaded carp dam passage on a large and small scale in the Upper Mississippi River (Pools 14–18) Hydrological and lock operation conditions associated with paddlefish and bigheaded carp dam passage on a large and small scale in the Upper Mississippi River (Pools 14–18)
Movement and dispersal of migratory fish species is an important life-history characteristics that can be impeded by navigation dams. Although habitat fragmentation may be detrimental to native fish species, it might act as an effective and economical barrier for controlling the spread of invasive species in riverine systems. Various technologies have been proposed as potential fish...
Authors
Dominique D. Turney, Andrea K. Fritts, Brent C. Knights, Jonathan M. Vallazza, Douglas Appel, James T. Lamar
Sclerochronological records of environmental variability and bivalve growth in the Pacific Arctic Sclerochronological records of environmental variability and bivalve growth in the Pacific Arctic
The Pacific Arctic region has experienced, and is projected to continue experiencing, rapid climate change. Large uncertainties exist in our understanding of the impact these physical changes have on the region’s ecology. This is, in part, due to the lack of long-term data. Here we investigate bivalve mollusc growth increment width chronologies (sclerochronologies) to develop a long-term
Authors
David J. Reynolds, Vanessa R. von Biela, Kenneth H. Dunton, David C. Douglas, Bryan A. Black
Examining industry vulnerability: A focus on mineral commodities used in the automotive and electronics industries Examining industry vulnerability: A focus on mineral commodities used in the automotive and electronics industries
Automotive manufacturing is material-intensive and dependent on a broad range of mineral commodities. Moreover, the automotive manufacturing industries are reliant on complex and sometimes opaque multi-tiered global supply chains. Among the many industries on which automotive supply chains depend are the electronics and semiconductor industries, which are themselves material-intensive...
Authors
Ross Manley, Elisa Alonso, Nedal T. Nassar
Crowd-sourced SfM: Best practices for high resolution monitoring of coastal cliffs and bluffs Crowd-sourced SfM: Best practices for high resolution monitoring of coastal cliffs and bluffs
Structure from motion (SfM) photogrammetry is an increasingly common technique for measuring landscape change over time by deriving 3D point clouds and surface models from overlapping photographs. Traditional change detection approaches require photos that are geotagged with a differential GPS (DGPS) location, which requires expensive equipment that can limit the ability of communities...
Authors
Phillipe Alan Wernette, Ian M. Miller, Andrew C. Ritchie, Jonathan A. Warrick