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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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Modeling the effects of temperature and limiting nutrients on the competition of an invasive floating plant, Pontederia crassipes, with submersed vegetation in a shallow lake Modeling the effects of temperature and limiting nutrients on the competition of an invasive floating plant, Pontederia crassipes, with submersed vegetation in a shallow lake
The potential for a non-native plant species to invade a new habitat depends on broadscale factors such as climate, local factors such as nutrient availability, and the biotic community of the habitat into which the plant species is introduced. We developed a spatially explicit model to assess the risk of expansion of a floating invasive aquatic plant species (FAV), the water hyacinth...
Authors
Linhao Xu, Don DeAngelis
Biogeochemical and community ecology responses to the wetting of non-perennial streams Biogeochemical and community ecology responses to the wetting of non-perennial streams
Transitions between dry and wet hydrologic states are the defining characteristic of non-perennial rivers and streams, which constitute the majority of the global river network. Although past work has focused on stream drying characteristics, there has been less focus on how hydrology, ecology and biogeochemistry respond and interact during stream wetting. Wetting mechanisms are highly...
Authors
Adam N. Price, Margaret Ann Zimmer, Anna J. Bergstrom, Amy J Burgin, Erin C. Seybold, Corey A. Krabbenhoft, Sam Zipper, Michelle H. Busch, Walter K. Dodds, Annika W. Walters, Jane S. Rogosch, Rachel Stubbington, Richard H Walker, James C. Stegen, Thibault Datry, Mathis L. Messager, Julian Olden, Sarah E Godsey, Margaret Shanafield, David E. Lytle, Ryan Burrows, Kendra E. Kaiser, George H. Allen, Meryl C. Mims, Jonathan D. Tonkin, Michael Bogan, John Christopher Hammond, Kate Boersma, Allison Myers-Pigg, Amanda DelVecchia, Daniel C. Allen, Songyan Yu, Adam Ward
Immunotoxic response of bio-based plastic on early life stage zebrafish (Danio rerio): A safe alternative to petroleum-based plastics? Immunotoxic response of bio-based plastic on early life stage zebrafish (Danio rerio): A safe alternative to petroleum-based plastics?
Bio-based plastics are marketed as environmentally friendly alternatives to petroleum-based plastics, although they require specific composting conditions for degradation, which leads to their accumulation in the environment and potential risks to aquatic organisms. We hypothesized that the accumulation of bio-based plastics may induce immunotoxic responses in fish. Our research focused...
Authors
Haodong Cheng, Yao Zou, Bin Lu, Jiazhen Wang, Rongrong Xuan, Jason Tyler Magnuson, Chunmiao Zheng, Wenhui Qiu
qPCR-based phytoplankton abundance and chlorophyll a: A multi-year study in twelve large freshwater rivers across the United States qPCR-based phytoplankton abundance and chlorophyll a: A multi-year study in twelve large freshwater rivers across the United States
Phytoplankton overgrowth, which characterizes the eutrophication or trophic status of surface water bodies, threatens ecosystems and public health. Quantitative polymerase chain reaction (qPCR) is promising for assessing the abundance and community composition of phytoplankton. However, applications of qPCR to indicate eutrophication and trophic status, especially in lotic systems, have...
Authors
Chiqian Zhang, Kyle D. McIntosh, N. Sienkiewicz, Erin A. Stelzer, Jennifer L. Graham, Jingrang Lu
Naturalized species drive functional trait shifts in plant communities Naturalized species drive functional trait shifts in plant communities
Despite decades of research documenting the consequences of naturalized and invasive plant species on ecosystem functions, our understanding of the functional underpinnings of these changes remains rudimentary. This is partially due to ineffective scaling of trait differences between native and naturalized species to whole plant communities. Working with data from over 75,000 plots and...
Authors
Magda Garbowski, Daniel L. McLaughlin, Dana M. Blumenthal, Helen Sofaer, David Barnett, Evelyn M. Beaury, Daniel Buonaiuto, Jeff Corbin, Jeffrey Dukes, Regan Early, Andrea Nebhut, Lais Petri, Montserrat Vila, Ian S. Pearse
Evaluating a process-guided deep learning approach for predicting dissolved oxygen in streams Evaluating a process-guided deep learning approach for predicting dissolved oxygen in streams
Dissolved oxygen (DO) is a critical water quality constituent that governs habitat suitability for aquatic biota, biogeochemical reactions and solubility of metals in streams. Recently introduced high-frequency sensors have increased our ability to measure DO, but we still lack the capacity to understand and predict DO concentrations at high spatial resolutions or in unmonitored...
Authors
Jeffrey M Sadler, Lauren Elizabeth Koenig, Galen Gorski, Alice M. Carter, Robert O. Hall
A benchmark dataset and workflow for landslide susceptibility zonation A benchmark dataset and workflow for landslide susceptibility zonation
Landslide susceptibility shows the spatial likelihood of landslide occurrence in a specific geographical area and is a relevant tool for mitigating the impact of landslides worldwide. As such, it is the subject of countless scientific studies. Many methods exist for generating a susceptibility map, mostly falling under the definition of statistical or machine learning. These models try...
Authors
Massimiliano Alvioli, Marco Loche, Liesbet Jacobs, Carlos H. Grohmann, Minu Treesa Abraham, Kunal Gupta, Neelima Satyam, Gianvito Scaringi, Txomin Bornaetxea, Mauro Rossi, Ivan Marchesini, Luigi Lombardo, Mateo Moreno, Stefan Steger, Corrado Camera, Greta Bajni, Guruh Samodra, Erwin Eko Wahyudi, Nanang Susyanto, Marko Sincic, Sanja Bernat Gazibara, Flavius Sirbu, Jewgenij Torizin, Nick Schussler, Benjamin B. Mirus, Jacob Bryson Woodard, Hector Aguilera, Jhonatan Steven Rivera-Rivera
Survey effort and targeted landbird community metrics at Indiana lowland forest restoration sites Survey effort and targeted landbird community metrics at Indiana lowland forest restoration sites
Many sampling and analytical methods can estimate the abundance, distributions, and diversity of birds and other wildlife. However, challenges with sample size and analytical capacity can make these methods difficult to implement for resource-limited monitoring programs. To apprise efficient and attainable sampling designs for landbird monitoring programs with limited observational data...
Authors
Benjamin M West, Mark L. Wildhaber, Nicholas S. Green, John P. Isanhart, M. Victoria McDonald, Michael J. Hooper
Free-roaming horses exceeding appropriate management levels affect multiple vital rates in greater sage-grouse Free-roaming horses exceeding appropriate management levels affect multiple vital rates in greater sage-grouse
Since the passage of the Wild Free-Roaming Horses and Burros Act of 1971, federal agencies have been responsible for managing free-roaming equids in the United States. Over the last 20 years, management has been hampered by direct opposition from advocacy groups, budget limitations, and a decline in the public’s willingness to adopt free-roaming horses (Equus caballus). As a result, free...
Authors
Jeffrey L. Beck, Megan C. Milligan, Kurt T. Smith, Phillip A. Street, Aaron C. Pratt, Christopher P. Kirol, Caitlyn P. Wanner, Jacob D. Hennig, Jonathan B. Dinkins, J. Derek Scasta, Peter S. Coates
Large eddy simulation of cross-shore hydrodynamics under random waves in the inner surf and swash zones Large eddy simulation of cross-shore hydrodynamics under random waves in the inner surf and swash zones
A 3D large eddy simulation coupled with a free surface tracking scheme was used to simulate cross-shore hydrodynamics as observed in a large wave flume experiment. The primary objective was to enhance the understanding of wave-backwash interactions and the implications for observed morphodynamics. Two simulation cases were carried out to elucidate key processes of wave-backwash...
Authors
Benjamin Tsai, Tian-Jian Hsu, Seok-Bong Lee, Maria Pontiki, Jack A. Puleo, Meagan E. Wengrove
Ambient flow and transport in long-screened, sand-packed wells: Insights into cross contamination and wellbore flow Ambient flow and transport in long-screened, sand-packed wells: Insights into cross contamination and wellbore flow
The presence of long-screened wells with a surrounding sand pack can have a major effect on the redistribution of contaminants in groundwater, particularly when the wells are set in low-hydraulic conductivity aquifers. Such redistribution, or cross contamination, can occur through vertical flow and advective transport or by in-well mixing via multiple non-advective transport processes. A...
Authors
Philip Harte, Christopher Palumbo Ely, Nicholas F. Teague, Nicole C. Fenton, Anthony A. Brown
Estimating ungulate migration corridors from sparse movement data Estimating ungulate migration corridors from sparse movement data
Many ungulates migrate between distinct summer and winter ranges, and identifying, mapping, and conserving these migration corridors have become a focus of local, regional, and global conservation efforts. Brownian bridge movement models (BBMMs) are commonly used to empirically identify these seasonal migration corridors; however, they require location data sampled at relatively frequent...
Authors
Jennifer L. McKee, Julien Fattebert, Ellen O. Aikens, Jodi Berg, Scott Bergen, Eric K. Cole, Holly E. Copeland, Alyson B. Courtemanch, Sarah Dewey, Mark Hurley, Blake Lowrey, Jerod A. Merkle, Arthur D. Middleton, Tristan A. Nuñez, Hall Sawyer, Matthew J. Kauffman