Reports
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 82,000 reports 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: 84723
Direct effects of pesticides and other grassland management practices on the North American Monarch Butterfly (Danaus plexippus plexippus): A systematic review Direct effects of pesticides and other grassland management practices on the North American Monarch Butterfly (Danaus plexippus plexippus): A systematic review
This review synthesizes recent scientific literature on the effects of grassland management practices and pesticide applications on monarch butterflies (Danaus plexippus), focusing on studies published since the 2020 U.S. Fish and Wildlife Service Species Status Assessment (SSA). While the SSA highlighted habitat conservation efforts to enhance monarch populations, there has been limited...
Authors
Elyssa C. McCulloch, Alex Morphew, Elisabeth B. Webb
Developing research tools for demographic study of Rhynchophanes mccownii (thick-billed longspurs) Developing research tools for demographic study of Rhynchophanes mccownii (thick-billed longspurs)
Like numerous other North American grassland bird species, Rhynchophanes mccownii (thick-billed longspur) has experienced severe population declines in the last 50 years. Little is known about population-limiting factors, and knowledge gaps limit conservation efforts on the species; however, before research studies aimed at improving conservation and management actions can be developed...
Authors
Megan M. Ring, Rose J. Swift, Michael J. Anteau, Lawrence D. Igl, Mark E Seamans, Scott G. Somershoe, Jay Alan VonBank, John M. Yeiser, Garrett J. MacDonald
Ungulate migrations of the Western United States, volume 5 Ungulate migrations of the Western United States, volume 5
Many ungulates migrate between distinct summer and winter ranges to take advantage of spatially and temporally variable food sources and avoid threats such as predators and deep snow. In 2018, the U.S. Department of the Interior established Secretarial Order 3362, which provided Federal support to expand existing research efforts to study ungulate populations and conserve their...
Authors
Matthew J. Kauffman, Blake Lowrey, Jennifer L. McKee, Travis Allen, Chloe J. Beaupre, Jeffrey L. Beck, Scott Bergen, Justin Binfet, Shelly Blair, James W. Cain, Peyton Carl, Todd Cornish, Michelle Cowardin, Rachel Curtis, Melia DeVivo, Jennifer Diamond, Katie M. Dugger, Orrin Duvuvuei, C.J. Ellingwood, Darby Finely, Jessica Fort, Eric Freeman, Ian Freeman, Jeff Gagnon, Emily R. Gelzer, Jacob Gray, Evan Greenspan, Curtis Hendricks, Valerie D. Hinojoza-Rood, Matthew Jeffress, Carolyn A. Kyle, Zack Lockyer, Cody McKee, Jerod Merkle, Jerrod Merrell, Matthew A. Mumma, Jake Powell, Craig Reddell, Adele K. Reinking, Robert Ritson, Sierra Robatcek, Benjamin S. Robb, Brianna M. Russo, Hall Sawyer, Cody Schroeder, Elissa Slezak, Scott Sprague, Erik Steiner, Alethea Steingisser, Tom Stephenson, Nicole Tatman, Kaitlyn L. Taylor, Don Whittaker, Travis Zaffarano
The 3D Elevation Program—Supporting Utah’s economy The 3D Elevation Program—Supporting Utah’s economy
Introduction High-quality elevation data for Utah inform decision making to improve the State’s economy. Light detection and ranging (lidar) data are used to support infrastructure planning and management, assess natural resources, and improve resiliency to hazards. The expanding availability of current and more accurate lidar data helps to better support natural resource conservation...
Authors
Cynthia L. Ritmiller
Hydrogeomorphic history, hydrodynamic conditions, and simulations of water levels and velocities from varying lake levels and streamflow for the Sheboygan Rivermouth and area of concern, Wisconsin Hydrogeomorphic history, hydrodynamic conditions, and simulations of water levels and velocities from varying lake levels and streamflow for the Sheboygan Rivermouth and area of concern, Wisconsin
In 2011–13, the U.S. Geological Survey (USGS) conducted a study of the hydrogeomorphic setting and hydrodynamic conditions of the lower Sheboygan River and island complex within the backwater zone of Lake Michigan. Analyses of historical aerial photographs from 1938–2010 indicated that the Wildwood Islands complex had experienced mainly erosion and what was mainly one island in 1938 had...
Authors
Faith A. Fitzpatrick, Stephen, M. Westenbroek, Paul C. Reneau, James D. Blount
Continuous stream discharge, salinity, and associated data collected in the lower St. Johns River and its tributaries, Florida, 2022 Continuous stream discharge, salinity, and associated data collected in the lower St. Johns River and its tributaries, Florida, 2022
The U.S. Army Corps of Engineers, Jacksonville District, deepened the St. Johns River channel in Jacksonville, Florida, to accommodate larger, fully loaded cargo vessels. The U.S. Geological Survey (USGS), in cooperation with the U.S. Army Corps of Engineers, monitored stage, discharge, and (or) water temperature and salinity at 26 continuous data collection sites in the St. Johns River...
Authors
Jennifer N. Carson, Matthew T. Benacquisto