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: 78958
Linkages between land-use change and groundwater management foster long-term resilience of water supply in California Linkages between land-use change and groundwater management foster long-term resilience of water supply in California
Study Region
Authors
Nathan D. Van Schmidt, Tamara Wilson, Ruth Langridge
Advanced distributed acoustic sensing vertical seismic profile imaging of an Alaska North Slope gas hydrate field Advanced distributed acoustic sensing vertical seismic profile imaging of an Alaska North Slope gas hydrate field
Gas hydrates are found in significant quantities on the North Slope of Alaska in subpermafrost sand units and intermixed in lower portions of permafrost within the hydrate stability window. While conventional surface seismic data and established imaging methods can indicate the presence of gas hydrate reservoirs, producing high-resolution images of (seismically) thin layers remains...
Authors
Cullen Young, Jeffrey Shragge, Whitney Shultz, Seth S. Haines, Can Oren, James Simmons, Timothy Collett
Geochemical and palaeomagnetic characteristics of the Vestfold Hills mafic dykes in the Prydz Bay region: implications of a Paleoproterozoic connection between East Antarctica and Proto-India Geochemical and palaeomagnetic characteristics of the Vestfold Hills mafic dykes in the Prydz Bay region: implications of a Paleoproterozoic connection between East Antarctica and Proto-India
The Archean age granite gneiss basement along the Prydz Bay coastline in East Antarctica hosts north–south-, east–west-, NE–SW- and NW–SE-trending mafic dyke swarms in the Vestfold Hills region that intruded between 2420 and 1250 Ma. The dyke trends do not show a direct correlation with the dyke geochemistry but can be broadly discriminated into high-Mg and Fe-rich tholeiites. The former...
Authors
Manoj K. Pandit, Anthony Francis Pivarunas, Joseph G Meert
Woody plant encroachment of grassland and the reversibility of shrub dominance: Erosion, fire, and feedback processes Woody plant encroachment of grassland and the reversibility of shrub dominance: Erosion, fire, and feedback processes
Many grass-dominated ecosystems in dryland regions have experienced increasing woody plant density and abundance during the past century. In many cases, this process has led to land degradation and declines in ecosystem functions. An example is the Chihuahuan Desert in the southwestern United States, which experienced different stages of shrub encroachment in the past 150 years. Among a...
Authors
Junran Li, Sujith Ravi, Guan Wang, R. Scott Van Pelt, Thomas E. Gill, Joel B. Sankey
Porewater chemistry of Louisiana marshes with contrasting salinities and its implications for coastal acidification Porewater chemistry of Louisiana marshes with contrasting salinities and its implications for coastal acidification
Dissolved inorganic carbon (DIC) and total alkalinity (TA) are fundamental components of carbonate systems that control pH and buffering capacity of the receiving water body. Three coastal marshes with contrasting salinities in Barataria Basin, Louisiana, USA, were sampled to understand seasonal changes in porewater carbonate chemistry and its impact on surrounding water bodies. Each...
Authors
Songjie He, Kanchan Maiti, Christopher Swarzenski, Tracy Elsey-Quirk, Gina Groseclose, Dubravko Justic
Patterns of parental care and movement in divided broods of golden-winged warblers Patterns of parental care and movement in divided broods of golden-winged warblers
Post-fledging brood division is a poorly understood, yet widespread suite of avian behaviours that includes both division of parental care and spatial division of a brood. For most species, the differences in parental care between adult males and females and the behavioural mechanisms explaining spatial patterns of brood division are unknown. We studied brood division in golden-winged...
Authors
Sean M. Peterson, Henry M. Streby, Gunnar R. Kramer, Jared M. Feura, David E. Andersen
Very low frequency earthquakes in between the seismogenic and tremor zones in Cascadia? Very low frequency earthquakes in between the seismogenic and tremor zones in Cascadia?
Megathrust earthquakes and their associated tsunamis cause some of the worst natural disasters. In addition to earthquakes, a wide range of slip behaviors are present at subduction zones, including slow earthquakes that span multiple orders of spatial and temporal scales. Understanding these events may shed light on the stress or strength conditions of the megathrust fault. Out of all...
Authors
Wenyuan Fan, Andrew J. Barbour, Jeffrey J. McGuire, Yihe Huang, Guoqing Lin, Elizabeth S. Cochran, Ryo Okuwaki
Dual resistance to Flavobacterium psychrophilum and Myxobolus cerebralis in rainbow trout (Oncorhynchus mykiss, Walbaum) Dual resistance to Flavobacterium psychrophilum and Myxobolus cerebralis in rainbow trout (Oncorhynchus mykiss, Walbaum)
Aquatic pathogens are a major concern for fish hatchery production, fisheries management, and conservation, and disease control needs to be addressed. Two important salmonid pathogens are Myxobolus cerebralis and Flavobacterium psychrophilum that cause whirling disease and bacterial coldwater disease (BCWD), respectively. Innate disease resistance is a potential option for reducing...
Authors
Brian W. Avila, Dana L. Winkelman, Eric R. Fetherman
Extreme uncertainty and unquantifiable bias do not inform population sizes Extreme uncertainty and unquantifiable bias do not inform population sizes
No abstract available.
Authors
Orin J. Robinson, Jacob B. Socolar, Erica Francis Stuber, Tom Auer, Alex J. Berryman, Philipp H. Boersch-Supan, Donald S. Brightsmith, Allan H. Burbidge, Stuart H.M. Butchart, Courtney L. Davis, Adriaan M. Dokter, Adrian S. Di Giacomo, Andrew Farnsworth, Daniel Fink, Wesley M. Hochachka, Paige E Howell, Frank A. La Sorte, Alexander C. Lees, Stuart Marsden, Robert Martin, Rowan O. Martin, Juan F. Masello, Eliot T. Miller, Yoshan Moodley, Andy Musgrove, David G. Noble, Valeria Ojeda, Petra Quillfeldt, J. Andrew Royle, Viviana Ruiz-Gutierrez, José L. Telleria, Pablo Yorio, Casey Youngflesh, Alison Johnston
Significance of U-Pb detrital zircon geochronology for mudstone provenance Significance of U-Pb detrital zircon geochronology for mudstone provenance
Detrital zircon U-Pb studies of mudstone provenance are rare but may preferentially fingerprint distal zircon sources. To examine this issue, Pierre Shale and Trinidad Sandstone deposited in a Late Cretaceous deltaic environment in the Raton Basin, Colorado (USA), were measured for detrital zircon U-Pb age by laser ablation–inductively coupled plasma–mass spectrometry. Two major detrital...
Authors
Paul Sylvester, Amanda Kate Souders, Rui Liu
The cost of avoiding predators: A bioenergetic analysis of diel vertical migration by the opossum shrimp Mysis diluviana The cost of avoiding predators: A bioenergetic analysis of diel vertical migration by the opossum shrimp Mysis diluviana
The freshwater opossum shrimp Mysis diluviana can undergo extensive diel vertical migration (DVM) to feed in shallow, prey rich strata at night. Bright moonlight limits their night-time migration presumably due to predator avoidance. Using a linked, foraging-bioenergetics model, we evaluated the cost of avoiding predators by simulating the effects of prey density, water temperature, and...
Authors
Steven R. Chipps, David H. Bennett, David Deslauriers, Lars G. Rudstam
Draft genome sequence of a novel calicivirus from a brown bullhead (Ameiurus nebulosus) from Lake Memphremagog, Vermont/Quebec Draft genome sequence of a novel calicivirus from a brown bullhead (Ameiurus nebulosus) from Lake Memphremagog, Vermont/Quebec
We report a draft genome sequence of a previously undescribed calicivirus from a single brown bullhead inhabiting Lake Memphremagog, Vermont/Quebec. The genome is 7,413 nucleotides long and is most similar to the Atlantic salmon calicivirus (nucleotide identity; 64.7%).
Authors
Luke R. Iwanowicz, Vicki S. Blazer, Tom Jones, Matthew Bodnar, Korin Ekholm, Julie Dragon, Peter Emmerson