Articles
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 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.
Filter Total Items: 77774
Fish invasion of prairie pothole wetlands reduces amphipod abundance, a key vertebrate forage Fish invasion of prairie pothole wetlands reduces amphipod abundance, a key vertebrate forage
Fishes have spread into previously fishless wetlands, likely affecting other species. In the Prairie Pothole Region of North America, the invasion of fish into wetlands is facilitated by interactions of altered land use, climate, and hydrology. We aimed to understand the effects of fishes on amphipods, which are macroinvertebrates that vertebrates rely on as forage. We hypothesized the...
Authors
Jake D. Carleen, Danelle M. Larson, Michael J. Anteau, Megan J. Fitzpatrick, Andrew W. Hafs, Carl W. Isaacson, Breanna R. Keith
Breeding ecology of White-tailed Hawks (Geranoaetus albicaudatus) on Texas barrier islands Breeding ecology of White-tailed Hawks (Geranoaetus albicaudatus) on Texas barrier islands
The White-tailed Hawk (Geranoaetus albicaudatus) is listed as a state threatened species in Texas. It occupies prairies and savannas of the Gulf Coastal Plain, but also the barrier islands, many of which are exposed to rapid development and other human disturbances. This is a concern as White-tailed Hawks are known to be highly sensitive to nesting disturbance. We examined the breeding...
Authors
Clint W. Boal, Carey L. Haralson-Strobel, C. Craig Farquhar
Importance of a lake-wetland complex for a resilient Walleye fishery Importance of a lake-wetland complex for a resilient Walleye fishery
Wetlands serve as unique habitats that can support high biodiversity. Large-scale loss of wetland habitats can threaten important linkages between lake and wetland habitats that could affect diversity and growth of aquatic organisms. In this study, we compare prey diversity and abundance as well as Walleye (Sander vitreus) diets and condition in a large glacial lake (Lake Kampeska, South...
Authors
Logan M. Cutler, Steven R. Chipps, Brian G. Blackwell, Alison A. Coulter
Decomposition of physical processes controlling EASM precipitation changes during the mid-Piacenzian: New insights into data–model integration Decomposition of physical processes controlling EASM precipitation changes during the mid-Piacenzian: New insights into data–model integration
The mid-Piacenzian warm period (MPWP, ~3.264–3.025 Ma) has gained widespread interest due to its partial analogy with future climate. However, quantitative data–model comparison of East Asian Summer Monsoon (EASM) precipitation during the MPWP is relatively rare, especially due to problems in decoding the imprint of physical processes to climate signals in the records. In this study...
Authors
Yong Sun, Haibin Wu, Lixin Chen, Christian Stepanek, Yan Zhao, Ning Tan, Baohuang Su, Xiayu Yuan, Wenchao Zhang, Bo Liu, Stephen Hunter, Alan M Haywood, Ayako Abe-Ouchi, Bette Otto-Bliesner, Camille Contoux, Daniel J. Lunt, Aisling M Dolan, Deepak Chandan, Gerrit Lohmann, Harry J. Dowsett, Julia C. Tindall, Michiel Baatsen, W. Richard Peltier, Qiang Li, Ran Feng, Ulrich Salzmann, Wing-Le Chan, Zhongshi Zhang, Charles J. R. Williams, Gilles Ramstein
Origins and nature of large explosive eruptions in the lower East Rift Zone of Kīlauea volcano, Hawaii: Insights from ash characterization and geochemistry Origins and nature of large explosive eruptions in the lower East Rift Zone of Kīlauea volcano, Hawaii: Insights from ash characterization and geochemistry
Several powerful explosive eruptions have taken place in the populated lower East Rift Zone of Kīlauea within the past ∼750 years. These have created distinctive landforms, including a tephra rim enclosing Puʻulena Crater immediately south of the Puna Geothermal Venture power station, a tuff cone at Kapoho Crater near the eastern cape of the Island of Hawaiʻi, and a set of littoral cones...
Authors
Richard W. Hazlett, Johanne Schmith, Allan Lerner, Drew T. Downs, Erin P. Fitch, Carolyn E. Parcheta, Cheryl A. Gansecki, Sarah A. Spaulding
Climate-influenced phenology of larval fish transport in a large lake Climate-influenced phenology of larval fish transport in a large lake
Elucidating physical transport phenologies in large lakes can aid understanding of larval recruitment dynamics. Here, we integrate a series of climate, hydrodynamic, biogeochemical, and Lagrangian particle dispersion models to: (1) simulate hatch and transport of fish larvae throughout an illustrative large lake, (2) evaluate patterns of historic and potential future climate-induced...
Authors
Spencer T. Gardner, Mark D. Rowe, Pengfei Xue, Xing Zhou, Peter Alsip, David Bunnell, Paris D. Collingsworth, Edward S. Rutherford, Tomas O. Hook
Bird community response to one decade of riparian restoration along the Colorado River delta in Mexico Bird community response to one decade of riparian restoration along the Colorado River delta in Mexico
We assessed the response of breeding birds to one decade of riparian restoration in the Colorado River delta including active vegetation management since 2010 and various environmental water deliveries since 2014. Bird surveys were conducted from 2002 to 2021 at 230 bird count stations distributed along five river reaches with different hydrogeomorphic characteristics, across 7 routes in...
Authors
Eduardo Gonzalez-Sargas, Timothy D Meehan, Osvel Hinojosa-Huerta, Steffany Villagomez-Palma, Alejandra Calvo-Fonseca, Christopher Dodge, Martha Gomez-Sapiens, Patrick B. Shafroth
Structure and morphology of chars and activated carbons obtained from thermal treatment of coal and biomass origin materials, including their wastes: Results from the ICCP Microscopy of Carbon Materials Working Group Structure and morphology of chars and activated carbons obtained from thermal treatment of coal and biomass origin materials, including their wastes: Results from the ICCP Microscopy of Carbon Materials Working Group
This paper describes the evaluation of petrographic textures in char and activated carbon derived from coal, coal by-products and biomass, formed during carbonization and activation processes. This work represents the results of interlaboratory exercises from 2016 to 2022 of the Microscopy of Carbon Materials Working Group in Commission III of the International Committee for Coal and...
Authors
G. Predeanu, M. Wojtaszek-Kalaitzidi, I. Suarez Ruiz, M.N. Balanescu, A. Gomez Borrego, M.D. Ghiran, Paul C. Hackley, S. Kalaitzidis, J. Kus, M. Mastalerz, M. Misz-Kennan, S. Pusz, S. Rodrigues, G. Siavalas, A. K. Varma, A. Zdravkov, D. Životić
Change in growth and prey utilization for a native salmonid following invasion by an omnivorous minnow in an oligotrophic reservoir Change in growth and prey utilization for a native salmonid following invasion by an omnivorous minnow in an oligotrophic reservoir
Aquatic invasive species can affect food web structure, native fish growth, and production, depending on the traits of the invasive species and the pre-invasion conditions of the ecosystem. Thermal tolerances and behavioral traits can further influence differential exploitation of resources shared between native and invasive species. An unauthorized introduction of redside shiner...
Authors
Rachelle Carina Johnson, Tessa Julianne Code, Karl D. Stenberg, Jonathan H Mclean, Benjamin Lorenz Jensen, Marshal S. Hoy, David Beauchamp
The utility of TerraSAR-X, TanDEM-X, and PAZ for studying global volcanic activity: Successes, challenges, and future prospects The utility of TerraSAR-X, TanDEM-X, and PAZ for studying global volcanic activity: Successes, challenges, and future prospects
TerraSAR-X (TSX), TanDEM-X (TDX), and PAZ Synthetic Aperture Radar data have been used at over 120 volcanoes to assess surface characteristics and change over time. We examine previous work, adding additional examples to understand where and when these data are most useful for volcanology. We focus on volcanoes as part of the Committee on Earth Observation Satellites (CEOS) Volcano...
Authors
Federico Galetto, Edna Dualeh, Francisco Delgado, Matthew Pritchard, Michael P. Poland, Susanna Ebmeier, Tara Shreve, Juliet Biggs, Ian Hamling, Christelle Wauthier, Judit Gonzalez Santana, Jean-Luc Froger, Mark Bemelmans
An integrative approach to assessing bridle shiner (Notropis bifrenatus) distribution using environmental DNA and traditional techniques An integrative approach to assessing bridle shiner (Notropis bifrenatus) distribution using environmental DNA and traditional techniques
The bridle shiner (Notropis bifrenatus) is a small cyprinid native to the eastern United States and Canada. Bridle shiner populations have declined across their range, and the species now receives concern status or legal protection in 13 states and two provinces. Bridle shiners were historically found in southern and western Maine in densely vegetated, shallow habitats along the...
Authors
Lara S. Katz, Stephen M. Jr. Coghlan, Erik J. Blomberg, Michael T. Kinnison, Geneva York, Joseph D. Zydlewski
Intraguild interactions and abiotic conditions mediate occupancy of mammalian carnivores: Co-occurrence of coyotes–fishers–martens Intraguild interactions and abiotic conditions mediate occupancy of mammalian carnivores: Co-occurrence of coyotes–fishers–martens
The widespread eradication of large carnivores and subsequent expansion of top mesopredators has the potential to impact species and community interactions with ecosystem-wide implications. An example of these trophic dynamics is the widespread establishment of coyotes following extirpation of wolves and mountain lions in eastern North America. Here, we examined occupancy of three...
Authors
Joshua P. Twining, Jennifer L. Brazeal, Paul G. Jensen, Angela K. Fuller