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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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Phytoplankton and cyanobacteria abundances in mid-21st century lakes depend strongly on future land use and climate projections Phytoplankton and cyanobacteria abundances in mid-21st century lakes depend strongly on future land use and climate projections
Land use and climate change are anticipated to affect phytoplankton of lakes worldwide. The effects will depend on the magnitude of projected land use and climate changes and lake sensitivity to these factors. We used random forests fit with long-term (1971–2016) phytoplankton and cyanobacteria abundance time series, climate observations (1971–2016), and upstream catchment land use...
Authors
Karan Kakouei, B.M. Kraemer, O. Anneville, L. Carvalho, H. Feuchtmayr, Jennifer L. Graham, S. Higgins, F. Pomati, L.G. Rudstam, J.D. Stockwell, S.J. Thackeray, M. Vanni, R. Adrian
Watershed and estuarine controls both influence plant community and tree growth changes in tidal freshwater forested wetlands along two U.S. mid-Atlantic rivers Watershed and estuarine controls both influence plant community and tree growth changes in tidal freshwater forested wetlands along two U.S. mid-Atlantic rivers
The tidal freshwater zone near the estuarine head-of-tide is potentially sensitive to both sea-level rise and associated salinity increases as well as changing watershed inputs of freshwater and nutrients. We evaluated the vegetation response of tidal freshwater forested wetlands (TFFW) to changes in nontidal river versus estuarine controls along the longitudinal gradient of the...
Authors
Gregory E. Noe, Norman A Bourg, Ken Krauss, Jamie A. Duberstein, Cliff R. Hupp
Risk-based wellhead protection decision support: A repeatable workflow approach Risk-based wellhead protection decision support: A repeatable workflow approach
Environmental water management often benefits from a risk-based approach where information on the area of interest is characterized, assembled, and incorporated into a decision model considering uncertainty. This includes prior information from literature, field measurements, professional interpretation, and data assimilation resulting in a decision tool with a posterior uncertainty...
Authors
Michael N. Fienen, Nicholas Corson-Dosch, Jeremy T. White, Andrew T. Leaf, Randall J. Hunt
Predicting non-native insect impact: Focusing on the trees to see the forest Predicting non-native insect impact: Focusing on the trees to see the forest
Non-native organisms have invaded novel ecosystems for centuries, yet we have only a limited understanding of why their impacts vary widely from minor to severe. Predicting the impact of non-established or newly detected species could help focus biosecurity measures on species with the highest potential to cause widespread damage. However, predictive models require an understanding of...
Authors
Ashley N. Schulz, Angela M. Mech, Matthew P. Ayres, Kamal J.K. Gandhi, Nathan P. Havill, Daniel A. Herms, Angela Marie Hoover, Ruth A. Hufbauer, Andrew M. Liebhold, Travis D. Marsico, Kenneth F. Raffa, Patrick C. Tobin, Daniel R. Uden, Kathryn A. Thomas
Consequences of changing water clarity on the fish and fisheries of the Laurentian Great Lakes Consequences of changing water clarity on the fish and fisheries of the Laurentian Great Lakes
Human-driven environmental change underlies recent changes in water clarity in many of the world’s great lakes, yet our understanding of the consequences of these changes on the fish and fisheries they support remains incomplete. Herein, we offer a framework to organize current knowledge, guide future research, and help fisheries managers understand how water clarity can affect their...
Authors
David Bunnell, Stuart A. Ludsin, Roger L. Knight, Lars G. Rudstam, Craig E. Williamson, Tomas O. Hook, Paris D. Collingsworth, Barry M. Lesht, Richard P. Barbiero, Anne E. Scofield, Edward S. Rutherford, Layne Gaynor, Henry A. Vanderploeg, Marten A. Koops
Making the most of volcanic eruption responses Making the most of volcanic eruption responses
No abstract available.
Authors
Tobias P. Fischer, Seth C. Moran, Kari M Cooper, Diana C. Roman, Peter C LaFemina
A big problem for small earthquakes: Benchmarking routine magnitudes and conversion relationships with coda-envelope-derived Mw in southern Kansas and northern Oklahoma A big problem for small earthquakes: Benchmarking routine magnitudes and conversion relationships with coda-envelope-derived Mw in southern Kansas and northern Oklahoma
Earthquake magnitudes are widely relied upon measures of earthquake size. Although moment magnitude (MwMw) has become the established standard for moderate and large earthquakes, difficulty in reliably measuring seismic moments for small (generally MwMwMw. To assess this problem, we apply coda envelope analysis to reliably determine moment magnitudes for a case study of small...
Authors
David R. Shelly, Kevin Mayeda, Justin Barno, Katherine M. Whidden, Morgan P. Moschetti, Andrea L. Llenos, Justin Rubinstein, William L. Yeck, Paul S. Earle, Rengin Gok, William R. Walter
Flow dynamics influence fish recruitment in hydrologically connected river-reservoir landscapes Flow dynamics influence fish recruitment in hydrologically connected river-reservoir landscapes
Hydrologic processes are often important determinants of successful recruitment of native fishes. However, water management practices can result in abnormal changes in daily and seasonal hydrology patterns. Rarely has fish recruitment across river–reservoir landscapes been considered in relation to flow management, despite the direct relationship between reservoir water management and...
Authors
J. Dattilo, Shannon K. Brewer, D. E. Shoup
Swipe left on the “big one”: Better dates for Cascadia quakes Swipe left on the “big one”: Better dates for Cascadia quakes
Improving our understanding of hazards posed by future large earthquakes on the Cascadia Subduction Zone requires advancements in the methods and sampling used to date and characterize past events.
Authors
Jessie K. Pearl, Lydia M. Staisch
Early Pleistocene climate-induced erosion of the Alaska Range formed the Nenana Gravel Early Pleistocene climate-induced erosion of the Alaska Range formed the Nenana Gravel
The Pliocene-Pleistocene transition resulted in extensive global cooling and glaciation, but isolating this climate signal within erosion and exhumation responses in tectonically active regimes can be difficult. The Nenana Gravel is a foreland basin deposit in the northern foothills of the Alaska Range (USA) that has long been linked to unroofing of the Alaska Range starting ca. 6 Ma...
Authors
Rachel Sortor, Brent Goehring, Sean Bemis, Chester A. Ruleman, Marc Caffee, Dylan Ward
The role of genome duplication in big sagebrush growth and fecundity The role of genome duplication in big sagebrush growth and fecundity
Premise Adaptive traits can be dramatically altered by genome duplication. The study of interactions among traits, ploidy, and the environment are necessary to develop an understanding of how polyploidy affects niche differentiation and to develop restoration strategies for resilient native ecosystems.Methods Growth and fecundity were measured in common gardens for 39 populations of big...
Authors
Bryce Richardson, Matthew Germino, Marcus V Warwell, Sven Buerki