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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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Ten years of volcanic activity at Mt Etna: High-resolution mapping and accurate quantification of the morphological changes by Pleiades and Lidar data Ten years of volcanic activity at Mt Etna: High-resolution mapping and accurate quantification of the morphological changes by Pleiades and Lidar data
The topography of Mt. Etna, Italy, is subjected to continuous modifications depending on intensity and magnitude of eruptions that frequently occur at the volcano summit and flanks. In order to make high-resolution maps of morphological changes and accurately calculate the overall volume of the erupted products (e.g., lava flows, tephra fall out, scoriae cones) in ten years, we have...
Authors
Marina Bisson, Claudia Spinetti, Daniele Andronico, Monica Palaseanu-Lovejoy, Maria Fabrizia Buongiorno, Oleg Alexandrov, Thomas Cecere
The contribution of land cover change to the decline of honey yields in the Northern Great Plains The contribution of land cover change to the decline of honey yields in the Northern Great Plains
Decreased availability of forage, as well as increased pesticide exposure, are important factors in the decline of honey bee health. Here, we isolate land cover transitions and their effect on honey production at 160 commercial apiaries in the Northern Great Plains. We found that land cover changes from 2008 to 2012 caused an annual decline in honey yields of 0.9% in the study area...
Authors
David Smith, Amelie Y. Davis, Claudia Hitaj, Dan Hellerstein, Amanda Preslicka, Emma Kirkpatrick, David M. Mushet, Eric Lonsdorf
Improving short-term recruitment forecasts for coho salmon using a spatiotemporal integrated population model Improving short-term recruitment forecasts for coho salmon using a spatiotemporal integrated population model
Fishery managers often rely on forecasts of future population abundance to set allowable harvest quotas or exploitation rates. While there has been substantial research devoted to identifying environmental factors that can predict recruitment for individual populations, such correlations often degrade over time, thereby limiting their utility for management. Conversely, examining...
Authors
Lukas B. DeFilippo, Thomas W. Buehrens, Mark David Scheuerell, Neala W. Kendall, Daniel E. Schindler
Large-scale variation in wave attenuation of oyster reef living shorelines and the influence of inundation duration Large-scale variation in wave attenuation of oyster reef living shorelines and the influence of inundation duration
One of the paramount goals of oyster reef living shorelines is to achieve sustained and adaptive coastal protection, which requires meeting ecological (i.e., develop a self-sustaining oyster population) and engineering (i.e., provide coastal defense) targets. In a large-scale comparison along the Atlantic and Gulf coasts of the United States, the efficacy of various designs of oyster...
Authors
R. L. Morris, Megan K. La Peyre, B. M. Webb, D. A. Marshall, D. M. Bilkovic, J. Cebrian, G. McClenachan, K. M. Kibler, L. J. Walters, D. Bushek, E. L. Sparks, N. A. Temple, J. A. Moody, K. Angstadt, J. Goff, M. K. Boswell, P. E. Sacks, S. E. Swearer
Assessing the uncertainties in climatic estimates based on vegetation assemblages: Examples from modern vegetation assemblages in the American Southwest Assessing the uncertainties in climatic estimates based on vegetation assemblages: Examples from modern vegetation assemblages in the American Southwest
Assemblages of fossil plant remains have been widely used to reconstruct past climatic conditions, usually through the application of methods that involve either finding vegetation analogues on the modern landscape (and using the modern associated climatic values as the basis for an estimate) or using the modern climatic ranges of individual taxa in an assemblage to determine the range...
Authors
Robert S. Thompson, Katherine H Anderson, Richard T. Pelltier, Laura E. Strickland, Sarah Shafer, Patrick J. Bartlein
Ten simple rules for productive lab meetings Ten simple rules for productive lab meetings
The aim of this article is to delineate 10 simple rules on how to achieve productive lab meetings. We use the term “meeting” interchangeably to represent both the single meeting event and the overarching concept of the recurring meeting. In this article we speak from our experience, as a lab group at the University of Massachusetts that meets regularly (Fig 1). Although the rules are...
Authors
Nigel Golden, Kadambari Devarajan, Cathleen Balantic, Joseph Drake, Michael T. Hallworth, Toni Lyn Morelli
Transient disease dynamics across ecological scales Transient disease dynamics across ecological scales
Analyses of transient dynamics are critical to understanding infectious disease transmission and persistence. Identifying and predicting transients across scales, from within-host to community-level patterns, plays an important role in combating ongoing epidemics and mitigating the risk of future outbreaks. Moreover, greater emphases on non-asymptotic processes will enable timely...
Authors
Yun Tao, Jessica L Hite, Kevin D. Lafferty, David J D Earn, Nita Bharti
Enhancing Great Lakes coastal ecosystems research by initiating engagement between scientists and decision-makers Enhancing Great Lakes coastal ecosystems research by initiating engagement between scientists and decision-makers
A disconnect between scientific research and environmental management communities can be a detriment to both. In the case of Great Lakes coastal ecosystems, which are inherently complex and subject to uncertain effects of future climatic, environmental, and anthropogenic drivers, greater collaboration could be beneficial to their sustainability. We capture the challenges and...
Authors
Charlotte B. Weinstein, Laura Bourgeau-Chavez, S. L. Martin, W. S. Currie, K. Grantham, Q. F. Hamlin, David W Hyndman, Kurt P. Kowalski, J. P. Martina, D. Pearsall
Impact of SST and surface waves on Hurricane Florence (2018): A coupled modeling investigation Impact of SST and surface waves on Hurricane Florence (2018): A coupled modeling investigation
Hurricane Florence (2018) devastated the coastal communities of the Carolinas through heavy rainfall that resulted in massive flooding. Florence was characterized by an abrupt reduction in intensity (Saffir-Simpson Category 4 to Category 1) just prior to landfall and synoptic-scale interactions that stalled the storm over the Carolinas for several days. We conducted a series of numerical...
Authors
Joseph Zambon, Ruoying He, John C. Warner, Christie Hegermiller
Long-term shedding from fully convalesced individuals indicates that Pacific herring are a reservoir for viral hemorrhagic septicemia virus Long-term shedding from fully convalesced individuals indicates that Pacific herring are a reservoir for viral hemorrhagic septicemia virus
Processes that allow viral hemorrhagic septicemia (VHS) virus to persist in the marine environment remain enigmatic, owing largely to the presence of covert and cryptic infections in marine fishes during typical sub-epizootic periods. As such, marine host reservoirs for VHS virus have not been fully demonstrated, nor have the mechanism(s) by which infected hosts contribute to virus...
Authors
Paul Hershberger, Ashley MacKenzie, Jacob L. Gregg, M. D. Wilmot, Rachel L. Powers, Maureen K. Purcell
N supply mediates the radiative balance of N2O emissions and CO2 sequestration driven by N-fixing vs. non-fixing trees N supply mediates the radiative balance of N2O emissions and CO2 sequestration driven by N-fixing vs. non-fixing trees
Forests are a significant CO2 sink. However, CO2 sequestration in forests is radiatively offset by emissions of nitrous oxide (N2O), a potent greenhouse gas, from forest soils. Reforestation, an important strategy for mitigating climate change, has focused on maximizing CO2 sequestration in plant biomass without integrating N2O emissions from soils. Although nitrogen (N)-fixing trees are...
Authors
Sian Kou-Giesbrecht, Jennifer L. Funk, Steven S. Perakis, Amelia A. Wolf, Duncan Menge
Satellite remote sensing to assess cyanobacterial bloom frequency across the United States at multiple spatial scales Satellite remote sensing to assess cyanobacterial bloom frequency across the United States at multiple spatial scales
Cyanobacterial blooms can have negative effects on human health and local ecosystems. Field monitoring of cyanobacterial blooms can be costly, but satellite remote sensing has shown utility for more efficient spatial and temporal monitoring across the United States. Here, satellite imagery was used to assess the annual frequency of surface cyanobacterial blooms, defined for each...
Authors
Megan M. Coffer, Blake Schaeffer, Wilson B. Salls, Erin Urquhart, Keith A. Loftin, Richard P. Stumpf, P. Jeremy Werdell, John A. Darling