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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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A landscape approach for identifying potential reestablishment sites for extirpated stream fishes: an example with Arctic grayling (Thymallus arcticus) in Michigan A landscape approach for identifying potential reestablishment sites for extirpated stream fishes: an example with Arctic grayling (Thymallus arcticus) in Michigan

Habitat degradation combined with climate change increases the threat of extinction for stream fishes. In response to these threats, efforts to reestablish species within formerly occupied streams or translocation to suitable areas may be effective conservation strategies. In the absence of historic species presence data, identifying locations where suitable habitat exists across many...
Authors
Ralph William Tingley, Dana M. Infante, Emily M. Dean, Douglas W. Schemske, Arthur R. Cooper, Jared Ross, Wesley M. Daniel

Ready for real time: Performance of Global Navigation Satellite System in 2019 Mw 7.1 Ridgecrest, California, rapid response products Ready for real time: Performance of Global Navigation Satellite System in 2019 Mw 7.1 Ridgecrest, California, rapid response products

Global Navigation Satellite Systems (GNSSs) have undergone notable advancement in the last few decades, leading to the availability of a dataset with capabilities well beyond its original intended purpose. The proliferation of high‐rate (1 Hz or greater) GNSS receivers in areas of seismological interest now allows for routine consideration of dynamic earthquake ground motions, with...
Authors
Dara Elyse Goldberg, Kirstie Lafon Haynie

Kinematic slip model of the July 8, 2021 M6.0 Antelope Valley, California, earthquake Kinematic slip model of the July 8, 2021 M6.0 Antelope Valley, California, earthquake

We present a kinematic slip model of the July 8, 2021 Antelope Valley earthquake from a finite-source inversion based on regional seismic waveforms and static offsets from GPS and InSAR. Seismic waveforms are employed at 6s dominant period out to 100 km from the epicenter, and the combined GPS and InSAR datasets cover the near field and far field out to ∼ 100 km and constrain the overall...
Authors
Frederick Pollitz, Charles Wicks, William M Hammond

Redundancy analysis reveals complex den use patterns by eastern spotted skunks, a conditional specialist Redundancy analysis reveals complex den use patterns by eastern spotted skunks, a conditional specialist

Wildlife managers tasked with understanding habitat and resource selection at the population level attempt to characterize patterns in nature that aid and inform conservation. Resource selection functions (RSFs), such as discrete choice analyses, are the standard convention to characterize the effects of habitat attributes on resource selection patterns. These tools are invaluable for...
Authors
Emily D. Thorne, W. Mark Ford

Geomorphic responses of fluvial systems to climate change: A habitat perspective Geomorphic responses of fluvial systems to climate change: A habitat perspective

Fluvial systems provide a variety of habitats that support thousands of species including many that are threatened or endangered. Moreover, these habitats, which range from aquatic and riparian to floodplain, are important for the variety of ecosystem services they provide. In addition to water temperature and streamflow change, geomorphic change is important and warrants consideration...
Authors
Kyle E. Juracek, Faith A. Fitzpatrick

Terrestrial ecosystem modeling with IBIS: Progress and future vision Terrestrial ecosystem modeling with IBIS: Progress and future vision

Dynamic Global Vegetation Models (DGVM) are powerful tools for studying complicated ecosystem processes and global changes. This review article synthesizes the developments and applications of the Integrated Biosphere Simulator (IBIS), a DGVM, over the past two decades. IBIS has been used to evaluate carbon, nitrogen, and water cycling in terrestrial ecosystems, vegetation changes, land...
Authors
Jinxun Liu, Xuehe Lu, Qiuan Zhu, Wenping Yuan, Quanzhi Yuan, Zhen Zhang, Qingxi Guo, Carol Deering

Winter habitat selection and efficacy of telemetry to aid Grass Carp removal efforts in a large reservoir Winter habitat selection and efficacy of telemetry to aid Grass Carp removal efforts in a large reservoir

Grass Carp Ctenopharyngodon idella were introduced in North America to control aquatic vegetation in small, closed systems. However, when they escape into larger systems in which they can reproduce, they have the potential to cause significant declines and alterations in aquatic vegetation communities. These alterations can in turn affect native species that are dependent on aquatic...
Authors
Tyler Michael Hessler, Duane Chapman, Craig P. Paukert, Jeff C. Jolley, Michael E. Byrne

A novel regression method for harmonic analysis of time series A novel regression method for harmonic analysis of time series

Harmonic analysis of time series is an important technique in remote sensing to reveal seasonal land surface dynamics. However, frequency selection in the harmonic analysis is often difficult because high-frequency components are useful for delineating seasonal dynamics but sensitive to noise and gaps in time series. On the other hand, it is challenging to obtain temporally continuous...
Authors
Qiang Zhou, Zhe Zhu, George Z. Xian, Congcong Li

A model-independent tool for evolutionary constrained multi-objective optimization under uncertainty A model-independent tool for evolutionary constrained multi-objective optimization under uncertainty

An open-source tool has been developed to facilitate constrained single- and multi-objective optimization under uncertainty (CMOU) analyses. The tool uses the well-known PEST interface protocols to communicate with the underlying forward simulation, making it non-intrusive. The tool contains a built-in parallel run manager to make use of heterogeneous and distributed computing resources...
Authors
Jeremy White, Matthew Knowling, Michael N. Fienen, Adam Siade, Otis Rea, Guillermo Martinez

Identifying and characterizing juvenile lake sturgeon (Acipenser fulvescens, Rafinesque, 1817) occupancy hot spots within the St. Clair-Detroit River System Identifying and characterizing juvenile lake sturgeon (Acipenser fulvescens, Rafinesque, 1817) occupancy hot spots within the St. Clair-Detroit River System

Over the past two decades, extensive monitoring has been conducted in the St. Clair – Detroit River System to describe spatial and temporal patterns of lake sturgeon (Acipenser fulvescens). To characterize spatial patterns in juvenile lake sturgeon (
Authors
Aaron J Mettler, Justin A. Chiotti, Andrew S Briggs, James C. Boase, Robin L. DeBruyne, Edward F. Roseman, Richard Drouin

The accuracy and consistency of 3D Elevation Program data: A systematic analysis The accuracy and consistency of 3D Elevation Program data: A systematic analysis

The 3D Elevation Program (3DEP) has created partnership opportunities to increase the collection of high-resolution elevation data across the United States, eventually leading to complete coverage of high-resolution, three-dimensional (3D) information from light detection and ranging (lidar) data across the entire country (interferometric synthetic aperture radar in Alaska). While 3DEP...
Authors
Jason M. Stoker, Barry Miller

Phenomenological and mechanistic modeling of recreational angling behavior using creel data Phenomenological and mechanistic modeling of recreational angling behavior using creel data

Improved understanding of angling behavior in recreational fisheries can help managers account for partial controllability in systems in which angling effort is not directly regulated. Relevant aspects of angling behavior include fishing participation, site choice, and catch-and-release actions and can be considered at scales of both aggregate fishing effort and individual-decision...
Authors
Alexander J. Jensen, Steven J. Dundas, James T. Peterson
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