Overview for geologic field-trip guides to Mount Mazama, Crater Lake Caldera, and Newberry Volcano, Oregon
Charles R. Bacon, Julie M. Donnelly-Nolan, Robert A. Jensen, Heather M. Wright
2017, Scientific Investigations Report 2017-5022-J
These field-trip guides were written for the occasion of the International Association of Volcanology and Chemistry of the Earth’s Interior (IAVCEI) quadrennial scientific assembly in Portland, Oregon, in August 2017. The guide to Mount Mazama and Crater Lake caldera is an updated and expanded version of the guide (Bacon, 1989)...
Surface morphology of caldera-forming eruption deposits revealed by lidar mapping of Crater Lake National Park, Oregon- Implications for emplacement and surface modification
Joel E. Robinson, Charles R. Bacon, Jon J. Major, Heather M. Wright, James W. Vallance
2017, Journal of Volcanology and Geothermal Research (342) 61-78
Large explosive eruptions of silicic magma can produce widespread pumice fall, extensive ignimbrite sheets, and collapse calderas. The surfaces of voluminous ignimbrites are rarely preserved or documented because most terrestrial examples are heavily vegetated, or severely modified by post-depositional processes. Much research addresses the internal sedimentary characteristics, flow processes, and...
Overview for geologic field-trip guides to volcanoes of the Cascades Arc in northern California
L.J. Patrick Muffler, Julie M. Donnelly-Nolan, Timothy L. Grove, Michael A. Clynne, Robert L. Christiansen, Andrew T. Calvert, Juliet Ryan-Davis
2017, Scientific Investigations Report 2017-5022-K
The California Cascades field trip is a loop beginning and ending in Portland, Oregon. The route of day 1 goes eastward across the Cascades just south of Mount Hood, travels south along the east side of the Cascades for an overview of the central Oregon volcanoes (including Three Sisters and...
The science and prediction of post-fire debris flows in the western United States
Dennis M. Staley, Jason W. Kean
2017, StreamNotes
No abstract available....
Modified mercalli intensities for nine earthquakes in central and western Washington between 1989 and 1999
Thomas M. Brocher, James W. Dewey, John F. Cassidy
2017, Open-File Report 2017-1104
We determine Modified Mercalli (Seismic) Intensities (MMI) for nine onshore earthquakes of magnitude 4.5 and larger that occurred in central and western Washington between 1989 and 1999, on the basis of effects reported in postal questionnaires, the press, and professional collaborators. The earthquakes studied include four earthquakes of M5 and...
Centennial-scale reductions in nitrogen availability in temperate forests of the United States
Kendra K. McLauchlan, Laci M. Gerhart, John J. Battles, Joseph M. Craine, Andrew J. Elmore, Phil E. Higuera, Michelle M Mack, Brendan E. McNeil, David M. Nelson, Neil Pederson, Steven S. Perakis
2017, Scientific Reports (7)
Forests cover 30% of the terrestrial Earth surface and are a major component of the global carbon (C) cycle. Humans have doubled the amount of global reactive nitrogen (N), increasing deposition of N onto forests worldwide. However, other global changes—especially climate change and elevated atmospheric carbon dioxide concentrations—are increasing demand...
Plasticity in skeletal characteristics of nursery-raised staghorn coral, Acropora cervicornis
Ilsa B. Kuffner, Erich Bartels, Anastasios Stathakopoulos, Ian C. Enochs, Graham Kolodziej, Lauren T. Toth, Derek P. Manzello
2017, Coral Reefs (36) 679-684
Staghorn coral, Acropora cervicornis, is a threatened species and the primary focus of western Atlantic reef restoration efforts to date. We compared linear extension, calcification rate, and skeletal density of nursery-raised A. cervicornis branches reared for 6 months either on blocks attached to substratum or hanging from PVC...
Evidence of compounded disturbance effects on vegetation recovery following high-severity wildfire and spruce beetle outbreak
Amanda R. Carlson, Jason S. Sibold, Timothy J. Assal, Jose F. Negron
2017, PLoS ONE (12)
Spruce beetle (Dendroctonus rufipennis) outbreaks are rapidly spreading throughout subalpine forests of the Rocky Mountains, raising concerns that altered fuel structures may increase the ecological severity of wildfires. Although many recent studies have found no conclusive link between beetle outbreaks and increased fire size or canopy mortality, few studies have...
Detecting temporal change in land-surface altitude using robotic land-surveying techniques and geographic information system applications at an earthen dam site in Southern Westchester County, New York
Michael L. Noll, Anthony Chu
2017, Open-File Report 2017-1028
In 2005, the U.S. Geological Survey began a cooperative study with New York City Department of Environmental Protection to characterize the local groundwater-flow system and identify potential sources of seeps on the southern embankment at the Hillview Reservoir in southern Westchester County, New York. Monthly site inspections at the reservoir...
Nutrient and pesticide contamination bias estimated from field blanks collected at surface-water sites in U.S. Geological Survey Water-Quality Networks, 2002–12
Laura Medalie, Jeffrey D. Martin
2017, Scientific Investigations Report 2016-5129
Potential contamination bias was estimated for 8 nutrient analytes and 40 pesticides in stream water collected by the U.S. Geological Survey at 147 stream sites from across the United States, and representing a variety of hydrologic conditions and site types, for water years 2002–12. This study updates previous U.S. Geological...
Abundant carbon substrates drive extremely high sulfate reduction rates and methane fluxes in Prairie Pothole Wetlands
Paula Martins, David W. Hoyt, Sheel Bansal, Christopher T. Mills, Malak Tfaily, Brian Tangen, Raymond Finocchiaro, Michael D. Johnston, Brandon C. McAdams, Matthew J. Solensky, Garrett J. Smith, Yu-Ping Chin, Michael J. Wilkins
2017, Global Change Biology (23) 3107-3120
Inland waters are increasingly recognized as critical sites of methane emissions to the atmosphere, but the biogeochemical reactions driving such fluxes are less well understood. The Prairie Pothole Region (PPR) of North America is one of the largest wetland complexes in the world, containing millions of small, shallow wetlands. The...
Statistical relative gain calculation for Landsat 8
Cody Anderson, Dennis Helder, Drake Jeno
2017, Conference Paper, Proceedings SPIE: Optics and Photonics 2017: Remote Sensing
The Landsat 8 Operational Land Imager (OLI) is an optical multispectral push-broom sensor with a focal plane consisting of over 7000 detectors per spectral band. Each of the individual imaging detectors contributes one column of pixels to an image. Any difference in the response between neighboring detectors may result in...
Methods for estimating annual exceedance-probability streamflows for streams in Kansas based on data through water year 2015
Colin C. Painter, David C. Heimann, Jennifer L. Lanning-Rush
2017, Scientific Investigations Report 2017-5063
A study was done by the U.S. Geological Survey in cooperation with the Kansas Department of Transportation and the Federal Emergency Management Agency to develop regression models to estimate peak streamflows of annual exceedance probabilities of 50, 20, 10, 4, 2, 1, 0.5, and 0.2 percent at ungaged locations in...
An integral projection model with YY-males and application to evaluating grass carp control
Richard A. Erickson, Eric A. Eager, Marybeth K. Brey, Michael J. Hansen, Patrick Kocovsky
2017, Ecological Modelling (361) 14-25
Invasive fish species disrupt ecosystems and cause economic damage. Several methods have been discussed to control populations of invasive fish including the release of YY-males. YY-males are fish that have 2 male chromosomes compared to a XY-male. When YY-males mate, they only produce male (XY) offspring. This decreases the female...
Land subsidence and recovery in the Albuquerque Basin, New Mexico, 1993–2014
Jessica M. Driscoll, Justin T. Brandt
2017, Scientific Investigations Report 2017-5057
The Albuquerque Bernalillo County Water Utility Authority (ABCWUA) drinking water supply was almost exclusively sourced from groundwater from within the Albuquerque Basin before 2008. In 2008, the San Juan-Chama Drinking Water Project (SJCDWP) provided surface-water resources to augment the groundwater supply, allowing for a reduction in groundwater pumping in the...
Seasonal trends in eDNA detection and occupancy of bigheaded carps
Richard A. Erickson, Christopher M. Merkes, Craig Jackson, Reuben Goforth, Jon Amberg
2017, Journal of Great Lakes Research (43) 762-770
Bigheaded carps, which include silver and bighead carp, are threatening to invade the Great Lakes. These species vary seasonally in distribution and abundance due to environmental conditions such as precipitation and temperature. Monitoring this seasonal movement is important for management to control the population size and spread of the species....
Genetic differentiation and inferred dynamics of a hybrid zone between Northern Spotted Owls (Strix occidentalis caurina) and California Spotted Owls (S. o. occidentalis) in northern California
Mark P. Miller, Thomas D. Mullins, Eric D. Forsman, Susan M. Haig
2017, Ecology and Evolution (7) 6871-6883
Genetic differentiation among Spotted Owl (Strix occidentalis) subspecies has been established in prior studies. These investigations also provided evidence for introgression and hybridization among taxa but were limited by a lack of samples from geographic regions where subspecies came into close contact. We analyzed new sets of samples from Northern...
Residence times and alluvial architecture of a sediment superslug in response to different flow regimes
John A. Moody
2017, Geomorphology (294) 40-57
A superslug was deposited in a basin in the Colorado Front Range Mountains as a consequence of an extreme flood following a wildfire disturbance in 1996. The subsequent evolution of this superslug was measured by repeat topographic surveys (31 surveys from 1996 through 2014) of 18 cross sections approximately...
Use of alternating and pulsed direct current electrified fields for zebra mussel control
James A. Luoma, Jan C. Dean, Todd J. Severson, Jeremy K. Wise, Matthew T. Barbour
2017, Management of Biological Invasions (8) 311-324
Alternatives to chemicals for controlling dreissenid mussels are desirable for environmental compatibility, but few alternatives exist. Previous studies have evaluated the use of electrified fields for stunning and/or killing planktonic life stages of dreissenid mussels, however, the available literature on the use of electrified fields to control adult dreissenid mussels...
Changes in projected spatial and seasonal groundwater recharge in the upper Colorado River Basin
Fred D. Tillman, Subhrendu Gangopadhyay, Tom Pruitt
2017, Groundwater (55) 506-518
The Colorado River is an important source of water in the western United States, supplying the needs of more than 38 million people in the United States and Mexico. Groundwater discharge to streams has been shown to be a critical component of streamflow in the Upper Colorado River Basin (UCRB),...
Effects of lateral confinement in natural and leveed reaches of a gravel-bed river: Snake River, Wyoming, USA
Christina Leonard, Carl J. Legleiter, Brandon T. Overstreet
2017, Earth Surface Processes and Landforms (42) 2119-2138
This study examined the effects of natural and anthropogenic changes in confining margin width by applying remote sensing techniques – fusing LiDAR topography with image-derived bathymetry – over a large spatial extent: 58 km of the Snake River, Wyoming, USA. Fused digital elevation models from 2007 and 2012 were differenced...
The transtensional offshore portion of the northern San Andreas fault: Fault zone geometry, late Pleistocene to Holocene sediment deposition, shallow deformation patterns, and asymmetric basin growth
Jeffrey W. Beeson, Samuel Y. Johnson, Chris Goldfinger
2017, Geosphere (13) 1173-1206
We mapped an ~120 km offshore portion of the northern San Andreas fault (SAF) between Point Arena and Point Delgada using closely spaced seismic reflection profiles (1605 km), high-resolution multibeam bathymetry (~1600 km2), and marine magnetic data. This new data set documents SAF location and continuity, associated tectonic geomorphology, shallow stratigraphy, and...
Autotrophic microbial arsenotrophy in arsenic-rich soda lakes
Ronald S. Oremland, Chad W. Saltikov, John F. Stolz, James T. Hollibaugh
2017, FEMS Microbiology Letters (364)
A number of prokaryotes are capable of employing arsenic oxy-anions as either electron acceptors [arsenate; As(V)] or electron donors [arsenite; As(III)] to sustain arsenic-dependent growth (‘arsenotrophy’). A subset of these microorganisms function as either chemoautotrophs or photoautotrophs, whereby they gain sufficient energy from their redox metabolism of arsenic to completely...
Using optimal transport theory to estimate transition probabilities in metapopulation dynamics
Jonathan M. Nichols, Jeffrey A. Spendelow, James D. Nichols
2017, Ecological Modelling (359) 311-319
This work considers the estimation of transition probabilities associated with populations moving among multiple spatial locations based on numbers of individuals at each location at two points in time. The problem is generally underdetermined as there exists an extremely large number of ways in which individuals can move from one...
Water quality measurements in San Francisco Bay by the U.S. Geological Survey, 1969–2015
Tara Schraga, James E. Cloern
2017, Scientific Data (4)
The U.S. Geological Survey (USGS) maintains a place-based research program in San Francisco Bay (USA) that began in 1969 and continues, providing one of the longest records of water-quality measurements in a North American estuary. Constituents include salinity, temperature, light extinction coefficient, and concentrations of chlorophyll-a, dissolved oxygen, suspended particulate...
