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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: 77779

Suspended sediment and fisheries: An exploration of empirical relationships Suspended sediment and fisheries: An exploration of empirical relationships

Objective: Sediment has an important role in aquatic ecosystems, however, excess sediment can negatively impact fish and other aquatic life. Quantifying the response of aquatic life, particularly fish, to suspended sediment is important for natural resource managers tasked with developing sediment management guidelines to protect aquatic ecosystems. Our goal was to assess the ability of
Authors
Ashleigh M. Pilkerton, Sara M. McCullough, Lindsay S. Patterson, Frank J. Rahel, Annika W. Walters

Monitoring cyanobacteria temporal trends in a hypereutrophic lake using remote sensing: From multispectral to hyperspectral Monitoring cyanobacteria temporal trends in a hypereutrophic lake using remote sensing: From multispectral to hyperspectral

Cyanobacterial harmful algal blooms (cyanoHABs) and associated cyanotoxins are a concern for inland waters. Due to the extensive spatial coverage and frequent availability of satellite images, multispectral remote sensing tools demonstrate utility for monitoring these blooms. The next frontier for remote sensing of cyanoHABs in inland waters is hyperspectral data. Recent and upcoming...
Authors
Samantha L. Sharp, Alicia Cortes, Alexander L. Forrest, Carl J. Legleiter, Liane S. Guild, Yufang Jin, S. Geoffrey Schladow

Favorability mapping for hydrothermal power resource assessments of the Great Basin, USA Favorability mapping for hydrothermal power resource assessments of the Great Basin, USA

The U.S. Geological Survey (USGS) is updating the 2008 assessment of conventional hydrothermal resources for the Great Basin in the western United States. As part of this work, the workflow for hydrothermal resource favorability maps is being modified to integrate modern data-driven machine learning (ML) methods. Improvements include: [1] using new and refined evidence layers (features)...
Authors
Stanley Paul Mordensky, Erick R. Burns, John Lipor, Jacob DeAngelo

Ten lessons for controlling invasive species: Wisdom from the long-standing sea lamprey control program on the Laurentian Great Lakes Ten lessons for controlling invasive species: Wisdom from the long-standing sea lamprey control program on the Laurentian Great Lakes

Sea lamprey (Petromyzon marinus) control in the Laurentian Great Lakes of North America is among the largest and most successful control programs of an invasive species anywhere on the planet. The effort began more than 75 years ago; it unites multiple nations, states, and provinces with the common goal of controlling this invasive species and protecting a valuable fishery. The science...
Authors
Steven J. Cooke, Carrie Baker, Julie L. Mida Hinderer, Michael Siefkes, Jessica Barber, Todd B. Steeves, Margaret F. Docker, Weiming Li, Michael Wilkie, Michael L. Jones, Kelly Filer Robinson, Erin S. Dunlop, Cory Brant, Nicholas S. Johnson, William Mattes, Marc Gaden, Andrew M. Muir

First record of twin and triplet embryos found in the clutch of a wild Burmese python in southern Florida First record of twin and triplet embryos found in the clutch of a wild Burmese python in southern Florida

No abstract available.
Authors
Génesis Aponte Santiago, Judith E. Baird-Lujano, Jacquelyn C. Guzy, Derrick G. Biglin, John-Kaarli M. Rentof, George F. Bancroft, Christina M. Romagosa, Matthew McCollister, Kristen Hart

The role of fire on Earth The role of fire on Earth

Fire is a defining feature of our biosphere, having appeared when the first plants colonized the land, and it continues to occur across the planet at different frequencies and intensities. Fire has been and remains as an evolutionary force in many plant and animal lineages and contributes to explaining the variability of our biodiversity. Fire has also shaped the structure of many...
Authors
Juli G. Pausas, Jon Keeley, William J. Bond

Contrasting long-term trends in channel width and shoreline complexity Contrasting long-term trends in channel width and shoreline complexity

Drought and reservoir management in the Colorado River Watershed have decreased peak flows and sediment loads reducing the ability of rivers to change their channels. Multiple studies have documented the resulting decrease in channel width, but less attention has been paid to long-term trends in shoreline complexity, including the number and size of islands. We used a sequence of aerial
Authors
Elizabeth Rachaelann Skaggs, Jonathan M. Friedman, Christopher Holmquist-Johnson

Near-surface material and topography generate anomalous high-frequency ground motion amplification in Chugiak, Alaska Near-surface material and topography generate anomalous high-frequency ground motion amplification in Chugiak, Alaska

An ∼3 km long nodal array oriented approximately east–west was deployed in Chugiak, Alaska, by the U.S. Geological Survey during 2021. The array intersects with the permanent NetQuakes station NP.ARTY, where peak ground acceleration (PGA) value of 1.98g was recorded during the 2018 Mw 7.1 Anchorage, Alaska, earthquake, in sharp contrast to the PGA of ∼0.3g at a site just 4 km to the west...
Authors
Te-Yang Yeh, Kim B. Olsen, Jamison Haase Steidl, Peter J. Haeussler

Using periodic matrix models to simulate the effectiveness of alternative reintroduction strategies for lizards on a seasonal tropical island Using periodic matrix models to simulate the effectiveness of alternative reintroduction strategies for lizards on a seasonal tropical island

Conservation translocations and reintroductions are widely used to improve conservation outcomes for declining species. Reintroductions are unlikely to be successful if the threats that led to the extirpation of the focal species, such as non-native predators, have not been ameliorated. The non-native brown treesnake (Boiga irregularis) was introduced to Guam in the mid-20th century and...
Authors
Jonathan P. Rose, Brian J. Halstead, Melia G. Nafus

The bat signal: An ultraviolet light lure to increase acoustic detection of bats The bat signal: An ultraviolet light lure to increase acoustic detection of bats

Bats are a taxa of high conservation concern and are facing numerous threats including widespread mortality due to White-Nose Syndrome (WNS) in North America. With this decline comes increasing difficulty in monitoring imperiled bat species due to lower detection probabilities of both mist-netting and acoustic surveys. Lure technology shows promise to increase detection while decreasing...
Authors
Samuel R. Freeze, Sabrina M. Deeley, Amber S. Litterer, J. Mark Freeze, W. Mark Ford

Spatial mapping of dissolved methane using an in situ sensor in Puget Sound Spatial mapping of dissolved methane using an in situ sensor in Puget Sound

Release of methane, as gas bubbles or in the dissolved phase, from the seafloor has been observed in coastal waters ( 1000 m). Methane dissolution within the water column affects the geochemistry of the surrounding water, leading to localized oxygen loss and potential escape to the atmosphere, particularly from shallower sites. Traditional methods for detecting and quantifying dissolved...
Authors
Alexandra M. Padilla, William Pardis, Jason Kapit, Tor A. Bjorklund, Nicholas D. Ward, Daniel J. Fornari, Susan Hautala, William F. Waite, H. Paul Johnson, Anna P. Michel

Home range, seasonality, and the importance of canopy cover for Texas Tortoises (Gopherus berlandieri) Home range, seasonality, and the importance of canopy cover for Texas Tortoises (Gopherus berlandieri)

Texas Tortoises (Gopherus berlandieri) are understudied compared to federally protected congeners. Despite important early studies on the basic ecology of G. berlandieri, quantitative identification of habitat associations with specific environmental conditions has been limited. Gopherus berlandieri inhabits Tamaulipan thornscrub across its range, and coastal populations are historically
Authors
Daniel A. Guerra, Todd C. Esque, Drew R. Davis, Joseph A. Veech
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