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Browse more than 160,000 publications authored by our scientists over the past 100+ year history of the USGS.  Publications available are: USGS-authored journal articles, series reports, book chapters, other government publications, and more.

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We are focused on some of the most significant issues society faces, and our science is making a substantial contribution to the well-being of the Nation and the world. Learn more about the major topics our research covers and the programs focused on those topics.

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Filter Total Items: 175531

Evaluation of classified ground points from National Agriculture Imagery program photogrammetrically derived point clouds Evaluation of classified ground points from National Agriculture Imagery program photogrammetrically derived point clouds

Studies have shown that digital surface models and point clouds generated by the United States Department of Agriculture’s National Agriculture Imagery Program (NAIP) can measure basic forest parameters such as canopy height. However, all measured forest parameters from these studies are evaluated using the differences between NAIP digital surface models (DSMs) and available lidar...
Authors
Jung-Kuan Liu, Samantha T. Arundel, Ethan J. Shavers
By
Core Science Systems Mission Area, Center of Excellence for Geospatial Information Science (CEGIS), National Geospatial Technical Operations Center

High resolution identification and quantification of diffuse deep groundwater discharge in mountain rivers using continuous boat-mounted helium measurements High resolution identification and quantification of diffuse deep groundwater discharge in mountain rivers using continuous boat-mounted helium measurements

Discharge of deeply sourced groundwater to streams is difficult to locate and quantify, particularly where both discrete and diffuse discharge points exist, but diffuse discharge is one of the primary controls on solute budgets in mountainous watersheds. The noble gas helium is a unique identifier of deep groundwater discharge because groundwater with long residence times is commonly...
Authors
Connor P. Newman, Eric Humphrey, Matthias Brennwald, W. Payton Gardner, Kelli M. Palko, Michael Gooseff, Kip Solomon
By
Water Resources Mission Area, Colorado Water Science Center, Utah Water Science Center

Use of otolith microchemistry to determine natal origin for Silver Carp Hypophthalmichthys molitrix in the lower Mississippi River basin Use of otolith microchemistry to determine natal origin for Silver Carp Hypophthalmichthys molitrix in the lower Mississippi River basin

Silver Carp (Hypophthalmichthys molitrix) populations have established and expanded throughout the lower Mississippi River basin (LMRB). Information pertaining to Silver Carp population mixing among rivers within the LMRB is lacking. Documented relations between Silver Carp otolith and river water barium (Ba) and strontium (Sr) microchemical signatures may enable estimation of origins of...
Authors
CE Barshinger, MA Eggleton, Jonathan J. Spurgeon
By
Cooperative Research Units

Assisted migration of coho salmon: Influences of passage and habitat availability on population dynamics Assisted migration of coho salmon: Influences of passage and habitat availability on population dynamics

Assisted migration is a means of introducing a species into a previously unoccupied area. Although this idea is relatively new for many species, there are many extant examples involving fish that can be instructive. We studied a case of assisted migration where upstream access of migrating adult coho salmon Oncorhynchus kisutch over a naturally impassible barrier was established through
Authors
Joseph R. Benjamin, Jason Dunham, Nicholas Scheidt, Carla Rothenbuecher, Cory Sipher
By
Ecosystems Mission Area, Forest and Rangeland Ecosystem Science Center

Little brown bats (Myotis lucifugus) are resistant to SARS-CoV-2 infection Little brown bats (Myotis lucifugus) are resistant to SARS-CoV-2 infection

It has been proposed that the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) virus that spread through human populations as a pandemic originated in Asian bats. There is concern that infected humans could transmit the virus to native North American bats; therefore, the susceptibility of several North American bat species to the pandemic virus has been experimentally...
Authors
Jeffrey S. Hall, Sean Nashold, Erik K. Hofmeister, Ariel Elizabeth Leon, Elizabeth Falendysz, Hon S. Ip, Carly M. Malave, Tonie E. Rocke, Mariano Carossino, Udeni B.R. Balasuriya, Susan Knowles
By
Ecosystems Mission Area, National Wildlife Health Center

Disturbance amplifies sensitivity of dryland productivity to precipitation variability Disturbance amplifies sensitivity of dryland productivity to precipitation variability

Variability of the terrestrial global carbon sink is largely determined by the response of dryland productivity to annual precipitation. Despite extensive disturbance in drylands, how disturbance alters productivity-precipitation relationships remains poorly understood. Using remote-sensing to pair more than 5600 km of natural gas pipeline corridors with neighboring undisturbed areas in...
Authors
Tyson J. Terry, Osvaldo E. Sala, Scott Ferrenberg, Sasha C. Reed, Brooke B. Osborne, Samuel E. Jordan, Steven R. Lee, Peter B. Adler
By
Ecosystems Mission Area, Southwest Biological Science Center
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