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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.

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Using integral projection models to explore management strategies for silver carp (Hypophthalmichthys molitrix) Using integral projection models to explore management strategies for silver carp (Hypophthalmichthys molitrix)

Silver carp (Hypophthalmichthys molitrix) are planktivorous fish that were originally introduced to the United States for use in fish production ponds and have since escaped these enclosures and are invading the Mississippi River Basin. The silver carp invasion of the Illinois River has a myriad of negative effects on native ecosystems. In this paper, we introduce key dependencies that...
Authors
Cameron Coles, Elizabeth Balas, James P Peirce, Greg J. Sandland, Richard A. Erickson

Insectivorous bat foraging tracks the availability of aquatic flies (Diptera) Insectivorous bat foraging tracks the availability of aquatic flies (Diptera)

Rivers and their adjacent riparian zones are model ecosystems for observing cross-ecosystem energy transfers. Aquatic insects emerging from streams, for example, are resource subsidies that support riparian consumers such as birds, spiders, lizards, and bats. We collaborated with recreational river runners in Grand Canyon, Arizona, USA, to record acoustic bat activity and sample riparian...
Authors
Anya Metcalfe, Carol Fritzinger, Theodore J. Weller, Michael J. Dodrill, Jeffrey Muehlbauer, Charles B. Yackulic, Brandon P. Holton, Cheyenne Maxime Szydlo, Laura E. Durning, Joel B. Sankey, Theodore Kennedy

Water balance characterization of the early 21st century drought in the western United States Water balance characterization of the early 21st century drought in the western United States

Monthly temperature and precipitation data for 923 United States Geological Survey 8-digit hydrologic units are used as inputs to a monthly water balance model to compute monthly actual evapotranspiration, soil moisture storage, and runoff across the western United States (U.S.) for the period 1900 through 2020. Time series of these water balance variables are examined to characterize...
Authors
Gregory J. McCabe, David M. Wolock

Evaluating Muskellunge catch-and-release mortality at elevated summer water temperature Evaluating Muskellunge catch-and-release mortality at elevated summer water temperature

Angling for Muskellunge Esox masquinongy has become widespread and increasingly popular. Management strategies for Muskellunge include high minimum harvest lengths (>1016mm), closed seasons, and catch-and-release regulations. Due to these strategies and angler behaviors, up to 97% of Muskellunge caught are released, and anglers assume these fish survive to be caught again in the future...
Authors
Ian Taylor Booth, Kyle J. Hartman, Derek P. Crane, Jeff L. Hansbarger, Jordan Weeks, Josh Henesy, Heather L. Walsh, Jeffrey C. Williams

Coordinating science during an eruption: Lessons from the 2020–2021 Kīlauea volcanic eruption Coordinating science during an eruption: Lessons from the 2020–2021 Kīlauea volcanic eruption

Data collected during well-observed eruptions can lead to dramatic increases in our understanding of volcanic processes. However, the necessary prioritization of public safety and hazard mitigation during a crisis means that scientific opportunities may be sacrificed. Thus, maximizing the scientific gains from eruptions requires improved planning and coordinating science activities among
Authors
Kari M. Cooper, Kyle R. Anderson, Kathy Cashman, Michelle L. Coombs, Hannah R. Dietterich, Tobias Fischer, Bruce F. Houghton, Ingrid A. Johanson, Kendra J. Lynn, Michael Manga, Christelle Wauthier

Secondary forest within a timber plantation concession in Borneo contributes to a diverse mammal assemblage Secondary forest within a timber plantation concession in Borneo contributes to a diverse mammal assemblage

Commercial tree plantations of fast-growing species have become increasingly important in Southeast Asia to meet global demand for wood and wood fiber products. There is a growing need to understand more about their value for wildlife and how they can be managed for biodiversity. We evaluated the effects of landscape attributes on mammal communities in a timber concession consisting of...
Authors
Wilvia Olivia William, Frank T. van Manen, Stuart P. Sharp, Shyamala Ratnayeke

The 2022 Hunga-Tonga megatsunami: Near-field simulation of a once-in-a-century event The 2022 Hunga-Tonga megatsunami: Near-field simulation of a once-in-a-century event

The Hunga Tonga–Hunga Ha’apai (HTHH) volcanic eruption in January 2022 generated catastrophic tsunami and contends for the largest natural explosion in more than a century. The main island, Tongatapu, suffered waves up to 17 m, and Tofua Island suffered waves up to 45 m, comfortably placing HTHH in the “megatsunami” league. We present a tsunami simulation of the Tongan Archipelago...
Authors
Sam Purkis, Steven N Ward, Nathan M. Fitzpatrick, James B. Garvin, Dan Slayback, Shane J. Cronin, Monica Palaseanu-Lovejoy, Alexandra Dempsey

Vital rates of a burgeoning population of Humpback Chub in western Grand Canyon Vital rates of a burgeoning population of Humpback Chub in western Grand Canyon

The Colorado River ecosystem has experienced habitat alterations and non-native species invasions, and as a result, many of its native species have experienced extirpations, abundance declines, and range constrictions. Despite these pitfalls, Humpback Chub, Gila cypha, have persisted and, in the last 10-15 years, expanded their range to become abundant in western Grand Canyon, a river...
Authors
Maria C. Dzul, Charles B. Yackulic, Mariah Aurelia Giardina, David R. Van Haverbeke, Michael D. Yard

Predicting baseflow recession characteristics at ungauged stream locations using a physical and machine learning approach Predicting baseflow recession characteristics at ungauged stream locations using a physical and machine learning approach

Prediction of short- (i.e., aquifer is near or at saturated conditions) and long-time (i.e., aquifer is not near or at saturated conditions) baseflow recession characteristics at ungauged stream locations is a current challenge that has been primarily addressed by empirical approaches that relate these characteristics to basin attributes. However, the performance of these models is often...
Authors
Ken Eng, David M. Wolock, Michael Wieczorek

Evaluation of models for estimating hydraulic conductivity in glacial aquifers from NMR logging Evaluation of models for estimating hydraulic conductivity in glacial aquifers from NMR logging

Nuclear magnetic resonance (NMR) logging is a promising method for estimating hydraulic conductivity (K). During the past ∼60 years, NMR logging has been used for petroleum applications, and different models have been developed for deriving estimates of permeability. These models involve calibration parameters whose values were determined through decades of research on sandstones and...
Authors
Alexander K. Kendrick, Rosemary Knight, Carole D. Johnson, Gaisheng Liu, David J. Hart, James J. Butler, Randall J. Hunt

Data integration reveals dynamic and systematic patterns of breeding habitat use by a threatened shorebird Data integration reveals dynamic and systematic patterns of breeding habitat use by a threatened shorebird

Incorporating species distributions into conservation planning has traditionally involved long-term representations of habitat use where temporal variation is averaged to reveal habitats that are most suitable across time. Advances in remote sensing and analytical tools have allowed for the integration of dynamic processes into species distribution modeling. Our objective was to develop...
Authors
Kristen S. Ellis, Michael J. Anteau, Garrett J. MacDonald, Rose J. Swift, Megan M. Ring, Dustin L. Toy, Mark H. Sherfy, Max Post van der Burg
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