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The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
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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PlioMIP: The Pliocene Model Intercomparison Project PlioMIP: The Pliocene Model Intercomparison Project
PlioMIP is a network of paleoclimate modelers and geoscientists who, through the study of the mid-Pliocene Warm Period (mPWP ~3.3–3.0 million years ago), seek to understand the sensitivity of the climate system to forcings and examine how well models reproduce past climate change.
Authors
A. M. Haywood, Harry J. Dowsett
Movement dynamics and survival of stocked Colorado River Cutthroat Trout Movement dynamics and survival of stocked Colorado River Cutthroat Trout
The ability of native fish to establish self-sustaining populations when reintroduced to vacant habitats is variable. We evaluated factors that potentially affect the reintroduction success of juvenile Colorado River Cutthroat Trout Oncorhynchus clarkii pleuriticus that were reintroduced to an isolated watershed and were experiencing suboptimal survival and recruitment. We conducted a 3...
Authors
Alex G. LeCheminant, Gabriel M. Barrile, Shannon E. Albeke, Annika W. Walters
Species invasion progressively disrupts the trophic structure of native food webs Species invasion progressively disrupts the trophic structure of native food webs
Species invasions can have substantial impacts on native species and ecosystems, with important consequences for biodiversity. How these disturbances drive changes in the trophic structure of native food webs through time is poorly understood. Here, we quantify trophic disruption in freshwater food webs to invasion by an apex fish predator, lake trout, using an extensive stable isotope...
Authors
Charles Wainright, Clint C. Muhlfeld, James J. Elser, Samuel Bourret, Shawn P. Devlin
Diet composition of the African manatee: Spatial and temporal variation within the Sanaga River Watershed, Cameroon Diet composition of the African manatee: Spatial and temporal variation within the Sanaga River Watershed, Cameroon
The present study aimed to investigate the diet of African manatees in Cameroon to better inform conservation decisions within protected areas. A large knowledge gap on diet and seasonal changes in forage availability limits the ability to develop informed local management plans for the African manatee in much of its range. This research took place in the Sanaga River Watershed, which...
Authors
Aristide Takoukam Kamla, Dylan G. E. Gomes, Cathy Beck, Lucy W. Keith-Diagne, Margaret Hunter, Ruth Francis-Floyd, Robert K. Bonde
Seasonality of solute flux and water source chemistry in a coastal glacierized watershed undergoing rapid change: Wolverine Glacier watershed, Alaska Seasonality of solute flux and water source chemistry in a coastal glacierized watershed undergoing rapid change: Wolverine Glacier watershed, Alaska
As glaciers around the world rapidly lose mass, the tight coupling between glaciers and downstream ecosystems is resulting in widespread impacts on global hydrologic and biogeochemical cycling. However, a range of challenges make it difficult to conduct research in glacierized systems and our knowledge of seasonally changing hydrologic processes and solute sources and signatures is...
Authors
Anna Bergstrom, Joshua C. Koch, Shad O'Neel, Emily Baker
Growth of the wildland-urban interface within and around U.S. National Forests and Grasslands, 1990-2010 Growth of the wildland-urban interface within and around U.S. National Forests and Grasslands, 1990-2010
The wildland-urban interface (WUI), where housing is in close proximity to or intermingled with wildland vegetation, is widespread throughout the United States, but it is unclear how this type of housing development affects public lands. We used a national dataset to examine WUI distribution and growth (1990–2010) in proximity to National Forests and created a typology to characterize...
Authors
Miranda H. Mockrin, Dave Helmers, Sebastian Martinuzzi, Todd Hawbaker, Volker C. Radeloff
Numerical simulation of the boundary layer flow generated in Monterey Bay, California by the 2010 Chilean tsunami: Case study Numerical simulation of the boundary layer flow generated in Monterey Bay, California by the 2010 Chilean tsunami: Case study
This work presents a case study involving the numerical simulation of the unsteady boundary layer generated by the 2010 Chilean tsunami, as measured by field equipment in Monterey Bay, California, USA. A one-dimensional vertical (1DV) boundary layer model is utilized, solving Reynolds-averaged Navier–Stokes equations, coupled with two-equation k–ω turbulence closure. Local effects of...
Authors
Athanasios Makris, Jessica R. Lacy, David R. Fuhrman
The AEMON-J “Hacking Limnology” workshop series & virtual summit: Incorporating data science and open science in aquatic research The AEMON-J “Hacking Limnology” workshop series & virtual summit: Incorporating data science and open science in aquatic research
Following the 2020 “Virtual Summit: Incorporating Data Science and Open Science in Aquatic Research” (DSOS; Meyer and Zwart 2020), a grassroots group of scientists convened the 2nd Virtual DSOS Summit on 22–23 July 2021. DSOS combined forces with the Aquatic Ecosystem MOdeling Network - Junior (AEMON-J; https://github.com/aemon-j) to host a 4-d “Hacking Limnology” Workshop Series prior...
Authors
Michael F. Meyer, Robert Ladwig, Jorrit Mesman, Isabella Oleksy, Carolina C. Barbosa, Kaelin M. Cawley, Alli N. Cramer, Johannes Feldbauer, Patricia Q. Tran, Jacob Aaron Zwart, Gregario A. Lopez Moreira, Muhammed Shikhani, Deviyani Gurung, Robert T. Hensley, Elena Matta, Ryan P. McClure, Thomas Petzoldt, Nuria Sanchez Lopez, Karline Soetaert, Mridul K. Thomas, Simon Nemer Topp, Xiao Yang
Potential effects of climate change on tick-borne diseases in Rhode Island Potential effects of climate change on tick-borne diseases in Rhode Island
Human cases of tick-borne diseases have been increasing in the United States. In particular, the incidence of Lyme disease, the major vector-borne disease in Rhode Island, has risen, along with cases of babesiosis and anaplasmosis, all vectored by the blacklegged tick. These increases might relate, in part, to climate change, although other environmental changes in the northeast (land...
Authors
Howard Ginsberg, Jannelle Couret, Jason Garrett, Thomas N. Mather, Roger A. LeBrun
Enhancing marsh elevation using sediment augmentation: A case study from southern California, USA Enhancing marsh elevation using sediment augmentation: A case study from southern California, USA
Tidal marshes are an important component of estuaries that provide habitat for fish and wildlife, protection from flooding, recreation opportunities, and can improve water quality. Critical to maintaining these functions is vertical accretion, a key mechanism by which tidal marshes build elevation relative to local sea level. The beneficial use of dredged material to build marsh...
Authors
Evyan Borgnis Sloane, Karen M. Thorne, Christine R Whitcraft, Victoria Touchstone
Tree mortality response to drought-density interactions suggests opportunities to enhance drought resistance Tree mortality response to drought-density interactions suggests opportunities to enhance drought resistance
The future of dry forests around the world is uncertain given predictions that rising temperatures and enhanced aridity will increase drought-induced tree mortality. Using forest management and ecological restoration to reduce density and competition for water offers one of the few pathways that forests managers can potentially minimize drought-induced tree mortality. Competition for...
Authors
John B. Bradford, Robert K Shriver, Marcos D. Robles, Lisa A McCauley, Caitlin M. Andrews, Michael A. Crimmins, David M. Bell