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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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Functional stability of vegetation following biocontrol of an invasive riparian shrub Functional stability of vegetation following biocontrol of an invasive riparian shrub
Understanding plant community response to environmental change is a crucial aspect of biological conservation and restoration, but species-based approaches are limited in that they do not reveal the underlying mechanisms driving vegetation dynamics. An understanding of trait-environment relationships is particularly important in the case of invasive species which may alter abiotic...
Authors
Annie L. Henry, Eduardo Gonzalez-Sargas, Patrick B. Shafroth, Alexander R.B. Goetz, Anna A. Sher
The ties that bind the sagebrush biome: Integrating genetic connectivity into range-wide conservation of greater sage-grouse The ties that bind the sagebrush biome: Integrating genetic connectivity into range-wide conservation of greater sage-grouse
Conserving genetic connectivity is fundamental to species persistence, yet rarely is made actionable into spatial planning for imperilled species. Climate change and habitat degradation have added urgency to embrace connectivity into networks of protected areas. Our two-step process integrates a network model with a functional connectivity model, to identify population centres important...
Authors
Todd B. Cross, Jason D. Tack, David E. Naugle, Michael D. Schwartz, Kevin E. Doherty, Sara J. Oyler-McCance, Ronald D. Pritchert, Brad C. Fedy
Unstructured-grid approach to develop high-fidelity groundwater model to understand groundwater flow and storage responses to excessive groundwater withdrawals in the Southern Hills aquifer system in southeastern Louisiana (USA) Unstructured-grid approach to develop high-fidelity groundwater model to understand groundwater flow and storage responses to excessive groundwater withdrawals in the Southern Hills aquifer system in southeastern Louisiana (USA)
Study region The Southern Hills aquifer system in the Louisiana Capital Area Groundwater Conservation District (CAGCD), USA. Study focus The Southern Hills aquifer system provides abundant groundwater for public and industrial supplies in the CAGCD. Groundwater depletion, saltwater intrusion, and land subsidence are potential concerns due to prolonged excessive groundwater withdrawals...
Authors
Ye-Hong Chen, Hamid Vahdat-Aboueshagh, Frank T.-C. Tsai, Alyssa Dausman, Michael C. Runge
Modeling post-wildfire hydrologic response: Review and future directions for applications of physically based distributed simulation Modeling post-wildfire hydrologic response: Review and future directions for applications of physically based distributed simulation
Wildfire is a growing concern as climate shifts. The hydrologic effects of wildfire, which include elevated hazards and changes in water quantity and quality, are increasingly assessed using numerical models. Post-wildfire application of physically based distributed models provides unique insight into the underlying processes that affect water resources after wildfire. This work reviews...
Authors
Brian A. Ebel, Zachary M. Shephard, Michelle A. Walvoord, Sheila F. Murphy, Trevor Fuess Partridge, Kimberlie Perkins
Geothermal energy production adversely affects a sensitive indicator species within sagebrush ecosystems in western North America Geothermal energy production adversely affects a sensitive indicator species within sagebrush ecosystems in western North America
Growing demand for renewable energy has resulted in expansion of energy infrastructure across sagebrush ecosystems of western North America. Geothermal power is an increasingly popular renewable energy source, especially within remote areas, but little is known about the impacts it may have on local wildlife populations. Investigations are warranted given similarities to more...
Authors
Peter S. Coates, Brian G. Prochazka, Shawn T. O’Neil, Sarah C. Webster, Shawn Espinosa, Mark A. Ricca, Steven R. Mathews, Michael L. Casazza, David J. Delehanty
Vulnerability to climate change of managed stocks in the California Current large marine ecosystem Vulnerability to climate change of managed stocks in the California Current large marine ecosystem
Introduction: Understanding how abundance, productivity and distribution of individual species may respond to climate change is a critical first step towards anticipating alterations in marine ecosystem structure and function, as well as developing strategies to adapt to the full range of potential changes. Methods: This study applies the NOAA (National Oceanic and Atmospheric...
Authors
Michelle M McClure, Melissa A. Haltuch, Ellen Willis-Norton, David D. Huff, Elliott L. Hazen, Lisa G. Crozier, Michael G. Jacox, Mark W. Nelson, Kelly S. Andrews, Lewis A. K. Barnett, Aaron M. Berger, Sabrina Beyer, Joe Bizzarro, David A. Boughton, Jason M. Cope, Mark H. Carr, Heidi Dewar, Edward Dick, Dorval Emmanis, Jason Dunham, Vladlena Gertseva, Correigh M. Greene, Richard G. Gustafson, Hamel Owen S., Chris J. Harvey, Mark J. Henderson, Chris E. Jordan, Isaac C. Kaplan, Steven T. Lindley, Nathan J. Mantua, Sean E. Matson, Melissa H. Monk, Peter B. Moyle, Colin L Nicol, John Pohl, Ryan R. Rykaczewski, Jameal F. Samhouri, Susan Sogard, Nick Tolimieri, John Wallace, Chantel Wetzel, Steven J. Bograd
Qualitative value of information provides a transparent and repeatable method for identifying critical uncertainty Qualitative value of information provides a transparent and repeatable method for identifying critical uncertainty
Conservation decisions are often made in the face of uncertainty because the urgency to act can preclude delaying management while uncertainty is resolved. In this context, adaptive management is attractive, allowing simultaneous management and learning. An adaptive program design requires the identification of critical uncertainties that impede the choice of management action...
Authors
Michelle L Stantial, Abigail Jean Lawson, Auriel Fournier, Peter J. Kappes, Chelsea S. Kross, Michael C. Runge, Mark S. Woodrey, James E. Lyons
An examination of soil crusts on the floor of Jezero crater, Mars An examination of soil crusts on the floor of Jezero crater, Mars
Martian soils are critically important for understanding the history of Mars, past potentially habitable environments, returned samples, and future human exploration. This paper examines soil crusts on the floor of Jezero crater encountered during initial phases of the Mars 2020 mission. Soil surface crusts have been observed on Mars at other locations, starting with the two Viking...
Authors
E.M. Hausrath, C. T. Adcock, A. Bechtold, P.S.A. Beck, K. Benison, A.J. Brown, E. L. Cardarelli, N. A. Carman, B. Chide, J. Christian, B. C. Clark, E. Cloutis, A. Cousin, O. Forni, Travis S.J. Gabriel, Olivier Gasnault, M. P. Golombek, F. Gomez, M. H. Hecht, T. L. J. Henley, J. Huidobro, J. C. Johnson, M. W. M. Jones, P. B. Kelemen, A. Knight, J. A. Lasue, Stéphane Le Mouélic, J. M. Madariaga, J. N. Maki, L. Mandon, G. Martinez, J. Martinez-Frias, T. H. McConnochie, P. #NAME? Meslin, M. #NAME? Zorzano, H. Newsom, G. Paar, N. Randazzo, C. Royer, S. Siljestroem, M. E. Schmidt, S. Schroeder, M. A. Sephton, R. Sullivan, N. Turenne, A. Udry, S. VanBommel, A. Vaughan, R. C. Wiens, N. Williams
Spatial and temporal analysis of geologic slip rates, Cucamonga Fault, California, USA: Implications for along-strike applications and multi-fault rupture Spatial and temporal analysis of geologic slip rates, Cucamonga Fault, California, USA: Implications for along-strike applications and multi-fault rupture
To constrain fault processes and hazard, fault slip rates may be extrapolated over different fault lengths or time intervals. Here, we investigate slip rates for the Cucamonga Fault (CF). The CF is located at the junction of the Transverse Range fault system with the San Andreas and San Jacinto Faults, and it is hypothesized to connect with these faults, promoting the propagation of...
Authors
Devin McPhillips, Katherine M. Scharer
Low Kirtland’s Warbler fledgling survival in Wisconsin plantations relative to Michigan plantations Low Kirtland’s Warbler fledgling survival in Wisconsin plantations relative to Michigan plantations
The Kirtland’s Warbler (Setophaga kirtlandii) is a formerly endangered habitat specialist that breeds mainly in young jack pine (Pinus banksiana) forests in northern Lower Michigan, USA. The species is conservation-reliant and depends on habitat management. Management actions have primarily focused on creating jack pine plantations, but the species also breeds in red pine (Pinus resinosa...
Authors
Ashley Olah, Christine Ribic, Kim Grveles, Sarah Warner, Davin Lopez, Anna M. Pidgeon
The 2013−2020 seismic activity at Sabancaya Volcano (Peru): Long lasting unrest and eruption The 2013−2020 seismic activity at Sabancaya Volcano (Peru): Long lasting unrest and eruption
Sabancaya volcano is the youngest and second most active volcano in Peru. It is part of the Ampato-Sabancaya volcanic complex which sits to the south of the ancient Hualca Hualca volcano and several frequently active faults, thus resulting in complex volcano-tectonic interactions. After 15 years of repose, in 2013, a series of 4 earthquakes with magnitude >4.5 occurred within 24 h...
Authors
Roger Machacca, P. Lesage, H. Tavera, J.D. Pesicek, C. Caudron, J.L. Torres, N. Puma, K. Vargas, I. Lazarte, M. Rivera, Alain Burgisser
Pelagic food web interactions in a large invaded ecosystem: Implications for reintroducing a native top predator Pelagic food web interactions in a large invaded ecosystem: Implications for reintroducing a native top predator
A series of species introductions, overexploitation, and habitat modification preceded the extirpation of Lahontan cutthroat trout (Oncorhynchus clarkii henshawi; LCT), historically the apex predator, from Lake Tahoe, California-Nevada, USA. Studies evaluating limiting factors for LCT emphasise the need to elucidate food web interactions, yet important knowledge gaps regarding trophic...
Authors
Adam G. Hansen, Allison McCoy, Gary P. Thiede, David Beauchamp