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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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Small fish, big implications: Considerations for an ecosystem approach to capelin fisheries management Small fish, big implications: Considerations for an ecosystem approach to capelin fisheries management
Climate-driven changes in the Subarctic will directly impact capelin populations and the ecosystem they inhabit, including their predators, prey, and physical habitats. Consequently, incorporating ecosystem considerations in future capelin fisheries management is crucial. In this study, a multidisciplinary group of experts critically evaluated whether the current capelin stock assessment...
Authors
Warsha Singh, John T. Trochta, Hannah M. Hannah M. Murphy, David W. McGowan, Aaron T. Adamack, Mayumi L. Arimitsu, Birkir Barðarson, Höskuldur Björnsson, Bjarte Bogstad, Mathieu Boudreau, Catherine Chambers, Harald Gjøsæter, Teunis Jansen, Sigurður Þ. Jónsson, Sturla Kvamsdal, Ron S. Lewis, Nina Mikkelsen, Torstein Pedersen, Anna H. Olafsdottir, Maartje Oostdijk, Teresa Silva, Georg Skaret, Robert M. Suryan, Sam Subbey
Evaluation of polymer-based dust palliatives in soil and stormwater runoff in an arid environment Evaluation of polymer-based dust palliatives in soil and stormwater runoff in an arid environment
Dust palliatives are used to reduce fugitive dust in areas susceptible to erosion by wind and rain. In 2015, the Bureau of Land Management (BLM) temporarily approved the use of polymer-based dust palliatives during the construction and operation of a solar energy facility and, in 2019, on a mining access road in Clark County, Nevada. The areas treated with palliative are habitat to the...
Authors
Angela Paul, Erin L. Orozco-Whitaker, S. Shamsuddin, Peng Xiang, Eric Landry
Seasonal variation in bay-marsh sediment exchange through a back-barrier salt marsh tidal creek Seasonal variation in bay-marsh sediment exchange through a back-barrier salt marsh tidal creek
Salt marsh resilience to sea-level rise largely depends on the balance of sediment exchanges with surrounding bays. In this study, we investigate mechanisms that determine residual sediment fluxes using continuous measurements of bay-marsh sediment exchange conducted in a tidal creek spanning 13 months (753 tidal cycles) in an intertidal marsh recently subsidized with sediment via thin...
Authors
Gregg A. Snedden, S. Jarrell Smith
Mitigating flood risks in urban estuaries: Tidal dynamics, shoreline hardening, nature-based solutions, and floodgates in San Francisco Bay Mitigating flood risks in urban estuaries: Tidal dynamics, shoreline hardening, nature-based solutions, and floodgates in San Francisco Bay
Hydrodynamic models are valuable tools for understanding the primary factors influencing daily and peak water levels and for guiding discussions on potential adaptation strategies for managing flood risk in coastal areas. This analysis uses the Delft3D San Francisco Bay-Delta Community Model to simulate water levels and incorporates the effects of a number of adaptation measures in the...
Authors
Kees Nederhoff, Rohin Saleh, Patrick L. Barnard, Mark T. Stacey
Invasive predatory fish occupies highest trophic position leading to expansion of isotopic niches in a riverine food web Invasive predatory fish occupies highest trophic position leading to expansion of isotopic niches in a riverine food web
Invasive species are drivers of ecological change with the potential to reshape the structure and function of terrestrial and aquatic ecosystems. The invasive flathead catfish (Pylodictis olivaris) is an opportunistic predator that has established a rapidly growing population in the Susquehanna River, Pennsylvania, USA, since they were first detected in 2002. Although the predatory...
Authors
Olivia C. Hodgson, Sydney Stark, Megan K. Schall, Geoffrey D. Smith, Kelly Smalling, Tyler Wagner
Placing environmental DNA monitoring for new detections into perspective: Fishes in the Milwaukee River, Wisconsin Placing environmental DNA monitoring for new detections into perspective: Fishes in the Milwaukee River, Wisconsin
Invasive species management frameworks, such as the early detection of and rapid response to invasive species, use monitoring programs to detect new species occurrences. Resource managers use environmental DNA (eDNA) as one tool for these monitoring programs. An eDNA detection in a new location may lack perspective for resource managers and researchers because of the rarity of potential...
Authors
Richard A. Erickson, Patrick W. DeHaan, Nicholas K. Frohnauer, Cari-Ann Hayer, Keta L. Oettinger, Tariq Tajjioui, Kyle M. Von Ruden, Hailey M. Willner, Stephen Frank Spear
Post-hatching maternal attendance in wild Burmese Pythons in southern Florida Post-hatching maternal attendance in wild Burmese Pythons in southern Florida
No abstract available.
Authors
Jacquelyn C. Guzy, Mark Robert Sandfoss, John-Kaarli M. Rentof, Judith E. Baird-Lujano, Genesis Aponte Santiago, Jose A. Torres, Lisa Marie McBride, Matthew Fox Metcalf, Amanda Marie Kissel, Christina Romagosa, Amy A. Yackel Adams, Brandon L. Welty, Melissa A. Miller, Matthew F. McCollister, Frank J. Mazzotti, Kristen Hart
Exploring the importance of metapopulation dynamics with population control strategies for invasive silver carp in the upper Mississippi River Exploring the importance of metapopulation dynamics with population control strategies for invasive silver carp in the upper Mississippi River
Invasive bigheaded carps (Bighead Carp Hypophthalmichthys nobilis, Silver Carp Hypophthalmichthys molitrix, and their hybrids Hypophthalmichthys spp.) currently infest the Mississippi River Basin. Bigheaded carps can outcompete native species in invaded waters and can also transform the surrounding environment. Currently, resource managers seek to limit the population abundance of...
Authors
Kassidy Frame, Gregory J. Sandland, Charles J. Labuzzetta, Grace L. Loppnow, Jessica C. Stanton, Yu-Chun Kao, Richard A. Erickson
Origin and evolution of mafic volcanism associated with 3 m.y. of andesite production at the Goat Rocks volcanic cluster, southern Washington Cascade Range Origin and evolution of mafic volcanism associated with 3 m.y. of andesite production at the Goat Rocks volcanic cluster, southern Washington Cascade Range
More than 3 m.y. of mafic volcanism near the Goat Rocks volcanic cluster in the southern Washington Cascade Range, USA, lends insight into the evolution of basalts and the subarc mantle at a long-lived, major arc volcanic locus. We contribute field observations, 40Ar/39Ar dates, paleomagnetic directions, and bulk rock and mineral compositions to characterize nine mafic units that erupted...
Authors
Kellie Taylor Wall, Anita L. Grunder, Joseph Biasi, Dominique Weis, Don Swanson, Mark E. Stelten
Bioaccumulation and transfer of per- and polyfluoroalkyl substances (PFAS) in a stream and riparian food web contaminated by food processing wastewater Bioaccumulation and transfer of per- and polyfluoroalkyl substances (PFAS) in a stream and riparian food web contaminated by food processing wastewater
We evaluated the bioaccumulation and transfer of per- and polyfluoroalkyl substances (PFAS) in a stream food web contaminated by a food processing facility. Abiotic (i.e., water, sediment, and foam) and biotic (i.e., algae, aquatic insect larvae and adults, fish, and riparian spiders) matrices were sampled upstream and downstream of the facility’s wastewater outfall. Compared with...
Authors
Christopher James Kotalik, Laura E. Hubbard, Brittany G. Perrotta, David M. Walters, Dana W. Kolpin, James L. Gray, Alison M. Zachritz, Johanna M. Kraus, Carrie E. Givens, Gary A. Lamberti, Karen A. Kidd
Clarifying the trophic state concept to advance macroscale freshwater science and management Clarifying the trophic state concept to advance macroscale freshwater science and management
For over a century, ecologists have used the concept of trophic state (TS) to characterize an aquatic ecosystem's biological productivity. However, multiple TS classification schemes, each relying on a variety of measurable parameters as proxies for productivity, have emerged to meet use-specific needs. Frequently, chlorophyll a, phosphorus, and Secchi depth are used to classify TS based...
Authors
Michael Frederick Meyer, Benjamin M. Kraemer, Carolina C. Barbosa, Davi G.F. Cuhna, Walter Dodds, Stephanie E. Hampton, César Ordóñez, Rachel M. Pilla, Amina Pollard, Joshua A. Culpepper, Alexander K. Fremier, Tyler V. King, Robert Ladwig, Dina M. Leech, Shin-Ichiro S. Matsuzaki, Isabella Oleksy, Simon N. Topp, Richard Woolway, Ludmila S Brighenti, Kate Colleen Fickas, Brian P. Lanouette, Jianning Ren, Mortimer Werther, Xiao Yang
Variation in gene expression across infection status and elevation in a Hawaiian honeycreeper Variation in gene expression across infection status and elevation in a Hawaiian honeycreeper
Introduced pathogens exert novel selection on hosts, and although many host species have experienced drastic population declines in the absence of adaptation, some hosts have adapted to highly virulent pathogens. For instance, mosquitoes and Plasmodium relictum introduced to the Hawaiian Islands have resulted in extinctions and catastrophic population declines due to avian malaria...
Authors
Loren Cassin-Sackett, Katherine Maria McClure, Taylor Callicrate, Eben H. Paxton, Robert C. Fleischer