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Browse more than 160,000 publications authored by our scientists over the past 100+ year history of the USGS.  Publications available are: USGS-authored journal articles, series reports, book chapters, other government publications, and more.

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Statistical analysis of Lake Tahoe secchi depth data Statistical analysis of Lake Tahoe secchi depth data

Secchi depth measurements in Lake Tahoe have been collected at a Long-Term Profile (LTP) monitoring site since 1968. Periodic updates in Secchi trend analysis are needed to understand changes in the long-term record, changes in seasonal pattern, and to provide insight into the progress of restoration efforts in improving lake clarity. As such, this analysis is intended to evaluate the...
Authors
Ramon C. Naranjo
By
Water Resources Mission Area, Nevada Water Science Center

Microplastic and associated black particles from road-tire wear: Implications for radiative effects across the cryosphere and in the atmosphere Microplastic and associated black particles from road-tire wear: Implications for radiative effects across the cryosphere and in the atmosphere

The environmental effects of airborne micro- and nano-size plastic particles are poorly understood. Microscopy and chemical analyses of atmospherically deposited particles on snow surfaces at high elevation (2,865–3,690 m) in the Upper Colorado River basin (UCRB; Colorado Rocky Mountains) revealed the presence of black substances intimately associated with microplastic fibers, particles
Authors
Richard L. Reynolds, Heather A. Lowers, George N. Breit, Harland L. Goldstein, Elizabeth Kellisha Williams, Corey Lawrence, Raymond F. Kokaly, Jeff Derry
By
Ecosystems Land Change Science Program, Geosciences and Environmental Change Science Center

How to reduce the risks of introducing and spreading invasive species in a major disaster How to reduce the risks of introducing and spreading invasive species in a major disaster

Disaster impacts are exacerbated by invasive species, which are harmful, non-native organisms that can be introduced and spread by disasters, including disaster response and recovery operations. Mechanisms are available to reduce risks from invasive species in a disaster, but those mechanisms are rarely used because invasive species experts and emergency managers – the two groups that...
Authors
Invasive Species Council

Elemental composition and potential toxicity of the riverine macrophyte Podostemum ceratophyllum Michx. reflects land use in eastern North America Elemental composition and potential toxicity of the riverine macrophyte Podostemum ceratophyllum Michx. reflects land use in eastern North America

Land use influences surface water quality, often alleviating stoichiometric constraints on primary production and altering biogeochemical cycling. However, land use effects on nutrient content and potential trace metal accumulation in aquatic plants remain unclear, and high concentrations of metals and altered nutrient ratios could impact the health of herbivores and detritivores. We...
Authors
James Wood, Lee H. Dietterich, Douglas R. Leasure, Sarah Jantzi, Thomas Maddox, Seth J. Wenger, Jonathan Skaggs, Amy D. Rosemond, Mary Freeman
By
Eastern Ecological Science Center

Fish health altered by contaminants and low water temperatures compounded by prolonged regional drought in the Lower Colorado River Basin, USA Fish health altered by contaminants and low water temperatures compounded by prolonged regional drought in the Lower Colorado River Basin, USA

The goal of this study was to assess health of male Common Carp (carp, Cyprinus carpio) at four sites with a wide range in environmental organic contaminant (EOC) concentrations and water temperatures in Lake Mead National Recreation Area NV/AZ, US, and the potential influence of regional drought. Histological and reproductive biomarkers were measured in 17–30 carp at four sites and 130...
Authors
Steven L Goodbred, Reynaldo Patino, David A. Alvarez, Darren Johnson, Deena Hannoun, Kathy R. Echols, Jill Jenkins
By
Ecosystems Mission Area, Wetland and Aquatic Research Center , Colorado River Basin: Actionable and Strategic Integrated Science and Technology, Drought

The Khonkho tephra: A large-magnitude volcanic eruption coincided with the rise of Tiwanaku in the Andes The Khonkho tephra: A large-magnitude volcanic eruption coincided with the rise of Tiwanaku in the Andes

We report a tephra deposit in the southern Lake Titicaca Basin, Bolivia, which was deposited by a major, previously unrecognized eruption sometime between AD 400 and 720. Archaeological data suggest these centuries were characterized by a substantial community migration to Tiwanaku, where social interaction networks gave birth to one of the Andes’ first large complex societies. Here we...
Authors
Erik J. Marsh, Christopher Harpel, David Damby
By
Volcano Hazards Program, Volcano Science Center
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