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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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Filter Total Items: 175939

Two-million-year eruptive history of Laguna del Maule volcanic field Two-million-year eruptive history of Laguna del Maule volcanic field

The Laguna del Maule (LdM) volcanic field, which surrounds the 54-km2 lake of that name, covers ∼500 km2 of mountainous glaciated terrain with Quaternary lavas and tuffs that extend 40 km westward from the Argentine frontier and 30 km north-south from the Río Campanario to Laguna Fea. Complementing recent investigations of postglacial volcanism and the ongoing geophysical unrest around...
Authors
Edward Hildreth, Judith E. Fierstein
By
Volcano Hazards Program, Volcano Science Center

Modeling the effects of temperature and limiting nutrients on the competition of an invasive floating plant, Pontederia crassipes, with submersed vegetation in a shallow lake Modeling the effects of temperature and limiting nutrients on the competition of an invasive floating plant, Pontederia crassipes, with submersed vegetation in a shallow lake

The potential for a non-native plant species to invade a new habitat depends on broadscale factors such as climate, local factors such as nutrient availability, and the biotic community of the habitat into which the plant species is introduced. We developed a spatially explicit model to assess the risk of expansion of a floating invasive aquatic plant species (FAV), the water hyacinth...
Authors
Linhao Xu, Don DeAngelis
By
Ecosystems Mission Area, Wetland and Aquatic Research Center

Facies variation within outcrops of the Triassic Shublik Formation, northeastern Alaska Facies variation within outcrops of the Triassic Shublik Formation, northeastern Alaska

The Shublik Formation (Middle to Upper Triassic) is a heterogeneous unit that is a major hydrocarbon source rock in northern Alaska and the largest known Triassic phosphate accumulation in the world. This formation, which occurs in the subsurface and crops out within the Arctic Alaska basin, was deposited on a gently sloping ramp along the northwestern Laurentian margin. In this study...
Authors
Julie A. Dumoulin, Katherine J. Whidden, William A. Rouse, Christina A. DeVera
By
Energy Resources Program, Central Energy Resources Science Center, Geology, Energy & Minerals Science Center, Alaska Science Center

Biogeochemical and community ecology responses to the wetting of non-perennial streams Biogeochemical and community ecology responses to the wetting of non-perennial streams

Transitions between dry and wet hydrologic states are the defining characteristic of non-perennial rivers and streams, which constitute the majority of the global river network. Although past work has focused on stream drying characteristics, there has been less focus on how hydrology, ecology and biogeochemistry respond and interact during stream wetting. Wetting mechanisms are highly...
Authors
Adam N. Price, Margaret Ann Zimmer, Anna J. Bergstrom, Amy J Burgin, Erin C. Seybold, Corey A. Krabbenhoft, Sam Zipper, Michelle H. Busch, Walter K. Dodds, Annika W. Walters, Jane S. Rogosch, Rachel Stubbington, Richard H Walker, James C. Stegen, Thibault Datry, Mathis L. Messager, Julian Olden, Sarah E Godsey, Margaret Shanafield, David E. Lytle, Ryan Burrows, Kendra E. Kaiser, George H. Allen, Meryl C. Mims, Jonathan D. Tonkin, Michael Bogan, John Christopher Hammond, Kate Boersma, Allison Myers-Pigg, Amanda DelVecchia, Daniel C. Allen, Songyan Yu, Adam Ward
By
Cooperative Research Units

Immunotoxic response of bio-based plastic on early life stage zebrafish (Danio rerio): A safe alternative to petroleum-based plastics? Immunotoxic response of bio-based plastic on early life stage zebrafish (Danio rerio): A safe alternative to petroleum-based plastics?

Bio-based plastics are marketed as environmentally friendly alternatives to petroleum-based plastics, although they require specific composting conditions for degradation, which leads to their accumulation in the environment and potential risks to aquatic organisms. We hypothesized that the accumulation of bio-based plastics may induce immunotoxic responses in fish. Our research focused...
Authors
Haodong Cheng, Yao Zou, Bin Lu, Jiazhen Wang, Rongrong Xuan, Jason Tyler Magnuson, Chunmiao Zheng, Wenhui Qiu
By
Ecosystems Mission Area, Columbia Environmental Research Center

qPCR-based phytoplankton abundance and chlorophyll a: A multi-year study in twelve large freshwater rivers across the United States qPCR-based phytoplankton abundance and chlorophyll a: A multi-year study in twelve large freshwater rivers across the United States

Phytoplankton overgrowth, which characterizes the eutrophication or trophic status of surface water bodies, threatens ecosystems and public health. Quantitative polymerase chain reaction (qPCR) is promising for assessing the abundance and community composition of phytoplankton. However, applications of qPCR to indicate eutrophication and trophic status, especially in lotic systems, have...
Authors
Chiqian Zhang, Kyle D. McIntosh, N. Sienkiewicz, Erin A. Stelzer, Jennifer L. Graham, Jingrang Lu
By
Water Resources Mission Area, New York Water Science Center
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