Evidence of Culiseta mosquitoes as vectors for Plasmodium parasites in Alaska
Matthew M. Smith, Caroline R. Van Hemert, Colleen M. Handel
2019, Journal of Vector Ecology (44) 68-75
Mosquito vectors play a crucial role in the distribution of avian Plasmodium parasites worldwide. At northern latitudes, where climate warming is most pronounced, there are questions about possible changes in the abundance and distribution of Plasmodium parasites, their vectors, and their impacts to avian hosts. To better understand the transmission of Plasmodium among...
San Francisco Bay triennial bird egg monitoring program for contaminants, California—2018
Joshua T. Ackerman, C. Alex Hartman, Mark P. Herzog, Matthew Toney
2019, Data Series 1114
The Regional Monitoring Program for Water Quality in San Francisco Bay (RMP), administered by the San Francisco Estuary Institute, is a large-scale effort to monitor contaminant trends in water, sediment, fish, and birds throughout San Francisco Bay (San Francisco Estuary Institute, 2016). As part of the RMP and the U.S. Geological Survey (USGS) long-term Wildlife Contaminants...
Dam effects on bedload transport on the upper Santa Ana River, California, and implications for native fish habitat
Scott Wright, J Toby Minear
2019, River Research and Applications 1-14
Dams disrupt the flow of water and sediment and thus have the potential to affect the downstream geomorphic characteristics of a river. Though there are some well‐known and common geomorphic responses to dams, such as bed armouring, the response downstream from any particular dam is dependent...
Turbidity current observations in a large reservoir following a major wildfire
Scott Wright, Mathieu D. Marineau
2019, Journal of Hydrologic Engineering (145)
Turbidity currents are generated when denser river water plunges and flows along the bottom of a lake, reservoir, or ocean. The plunging and downstream movement are driven by density differences due to temperature and/or suspended sediment, and currents have been observed to move slowly over long distances....
Evaluating the mid-infrared bi-spectral index for improved assessment of low-severity fire effects in a conifer forest
R McCarley, A.M.S Smith, C.A. Kolden, Jason R. Kreitler
2019, International Journal of Wildland Fire (27) 407-412
Remote sensing products provide a vital understanding of wildfire effects across a landscape, but detection and delineation of low- and mixed-severity fire remains difficult. While data provided by the Monitoring Trends in Burn Severity project (MTBS) are frequently used to assess severity in the United States, alternative indices can offer...
Climate adaptation Science Centers—Annual report for 2018
Elda Varela Minder
2019, Open-File Report 2019-1041
2018 marked the 10-year anniversary of the establishment of the U.S. Geological Survey (USGS) National Climate Change and Wildlife Science Center! With the passage of the fiscal year 2018 budget on March 23, 2018, our program name was changed from the National Climate Change and Wildlife Science Center to the...
Seasonal development of the coccidian parasite Goussia bayae and hepatobiliary histopathology in white perch Morone americana from Chesapeake Bay
Mark A Matsche, Vicki S. Blazer, Patricia M. Mazik
2019, Diseases of Aquatic Organisms (134) 113-135
The coccidium Goussia bayae infects the gallbladder and bile ducts of white perch Morone americana from Chesapeake Bay, USA. Seasonal changes in coccidian infections were analyzed from bile specimens of 1588 fish from the Choptank River during 2016-2018 using wet mount preparations with a Sedgwick-Rafter counting chamber. Histopathology of the gallbladder and liver...
Prototype downscaling algorithm for MODIS Satellite 1 km daytime active fire detections
Sanath S. Kumar, Joshua J. Picotte, Birgit Peterson
2019, Fire (2)
This work presents development of an algorithm to reduce the spatial uncertainty of active fire locations within the 1 km MODerate resolution Imaging Spectroradiometer (MODIS Aqua and Terra) daytime detection footprint. The algorithm is developed using the finer 500 m reflective bands by leveraging on the increase in 2.13...
Atrazine induced transgenerational reproductive effects in medaka (Oryzias latipes)
Jacob A. Cleary, Donald E. Tillitt, Fredrick S. vom Saal, Diane Nicks, Rachel Claunch, Ramji K. Bhandari
2019, Environmental Pollution (251) 639-650
Atrazine is presently one of the most abundantly used herbicides in the United States, and a common contaminant of natural water bodies and drinking waters in high-use areas. Dysregulation of reproductive processes has been demonstrated in atrazine exposed fish, including alteration of key endocrine...
Mapping cropland extent of Southeast and Northeast Asia using multi-year time-series Landsat 30-m data using Random Forest classifier on Google Earth Engine
Adam Oliphant, Prasad S. Thenkabail, Pardhasaradhi Teluguntla, Jun Xiong, Murali Krishna Gumma, Russell G. Congalton, Kamini Yadav
2019, International Journal of Applied Earth Observation and Geoinformation (81) 110-124
Cropland extent maps are useful components for assessing food security. Ideally, such products are a useful addition to countrywide agricultural statistics since they are not politically biased and can be used to calculate cropland area for any spatial unit from an individual...
Winter and spring diet of the orangebelly darter, Etheostoma radiosum, among tributaries of the Lower Mountain Fork River
M. L. Reed, W. W. Hoback, James M. Long
2019, Southwestern Naturalist (63) 146-148
Little is known about prey use by the orangebelly darter, Etheostoma radiosum, and what is known has been described from relatively large river systems. We examined prey use by orangebelly darters from first- and second-order tributaries in the Lower Mountain Fork River of southeastern Oklahoma. Adult darters (n = 141) were captured...
The importance of groundwater flow to the formation of modern thrombolitic microbialites
John G. Warden, Lee Coshell, Michael R. Rosen, Daniel O. Breecker, Katinka X. Ruthrof, Christopher R. Omelon
2019, Geobiology
Modern microbialites are often located within groundwater discharge zones, yet the role of groundwater in microbialite accretion has yet to be resolved. To understand relationships between groundwater, microbialites, and associated microbial communities, we quantified and characterized groundwater flow and chemistry in active thrombolitic microbialites in Lake...
Jack Boatwright’s last science
Annemarie S. Baltay Sundstrom, Thomas C. Hanks
2019, Seismological Research Letters (90) 1444-1445
In the months before he passed away, Jack Boatwright asked us to review a manuscript on source properties, specifically stress drop, of earthquakes in northeastern North America (NENA). This manuscript originated in research funded by the U.S. Nuclear Regulatory Commission (NRC), described in his final report to NRC and published...
Groundwater quality in the Delaware, Genesee, and St. Lawrence River Basins, New York, 2015
Tia-Marie Scott, Elizabeth A. Nystrom, James E. Reddy
2019, Open-File Report 2019-1005
The U.S. Geological Survey, in cooperation with the New York State Department of Environmental Conservation, collected groundwater samples from 5 production wells and 5 domestic wells in the Delaware River Basin, 8 production wells and 7 domestic wells in the Genesee River Basin, and 1 municipal well, 7 production wells,...
Measurement of nutrients in saline and hypersaline waters by discrete analyzer colorimetry without matrix matched calibration standards
Sarah Stetson, Charles Patton, Nicole Lynn Guaglione, Zachary Chestnut
2019, Talanta (203) 297-304
Automated, colorimetric analysis of nutrients in samples with high and variable salinity can be time consuming due to the need to matrix match calibration and reference solution matrices with those of samples—particularly when using flow-based analyzers that are prone to detector artifacts caused by optical inhomogeneities, “schlieren”, that form at...
Sea-cliff bedstraw (Galium buxifolium) patterns and trends, 2005–14, on Santa Cruz and San Miguel Islands, Channel Islands National Park, California
Kathryn McEachern, Katherine A. Chess, Karen Flagg, Kenneth G. Niessen
2019, Open-File Report 2019-1054
Sea-cliff bedstraw (Galium buxifolium [Rubiaceae]) is a delicate dioecious subshrub endemic to Santa Cruz and San Miguel Islands, in the northern California Channel Islands. It was listed as endangered in 1997 under the Federal Endangered Species Act, threatened by soil loss, habitat alteration, and herbivory from more than a century...
Petrographic, geochemical, and geochronologic data for cenozoic volcanic rocks of the Tonopah, Divide, and Goldfield Mining Districts, Nevada
Edward A. du Bray, David A. John, Peter G. Vikre, Joseph P. Colgan, Michael A. Cosca, Leah E. Morgan, Robert J. Fleck, Wayne R. Premo, Christopher S. Holm-Denoma
2019, Data Series 1099
The purpose of this report is to summarize geochemical, petrographic, and geochronologic data for samples, principally those of unmineralized Tertiary volcanic rocks, from the Tonopah, Divide, and Goldfield mining districts of west-central Nevada (fig. 1). Much of the data presented here for the Tonopah and Divide districts are for samples...
Non-native plants have greater impacts because of differing per-capita effects and non-linear abundance-impact curves
Ian S. Pearse, Helen Sofaer, David N. Zaya, Greg Spyreas
2019, Ecology Letters (22) 1214-1220
Invasive, non-native species can have tremendous impacts on biotic communities, where they reduce the abundance and diversity of local species. However, it remains unclear whether impacts of non-native species arise from their high abundance or whether each non-native individual has a disproportionate impact – i.e., a higher per-capita effect –...
Looking for love under the ice: Using passive acoustics to detect burbot (Lota lota: Gadidae) spawning activity
Timothy B. Grabowski, Shawn P. Young, Peter A. Cott
2019, Freshwater Biology (65) 37-44
Burbot (Lota lota: Gadidae) is a difficult species to manage effectively due to its preference for deep‐water habitats and under‐ice spawning behaviour, resulting in a poor understanding of its reproductive activity. However, the use of acoustic signalling by burbot as part of their mating system has recently been described...
Radiometric ages of volcanic rocks on the fort rock dome and in the aquarius mountains, Yavapai and Mohave Counties, Arizona
Gary S. Fuis, Andrew T. Calvert, Katie Sullivan
2019, Open-File Report 2019-1038
The Fort Rock dome, in Yavapai County, Ariz., is a roughly circular geologic structure in plan view, 2.5 km in diameter, that is similar in many ways to an impact crater; however, it is a structural dome caused by a potassic mafic intrusion at depth, and the crater-like depression in...
Hydrogeology of an alpine talus aquifer: Cordillera Blanca, Peru
Robin Glas, Laura K. Lautz, Jeffrey M. McKenzie, Robert Moucha, Daniel Chavez, Bryan Mark, John W. Lane Jr.
2019, Hydrogeology Journal (21) 2137-2154
The dramatic loss of glacial mass in low latitudes is causing shifts in downstream water availability and use during the driest months of the year. The world’s largest concentration of tropical glaciers lies in the Cordillera Blanca range of Peru, where glacial runoff is declining and...
Monitoring volcanic deformation
Maurizio Battaglia, Jorge Alpala, Rosa Alpala, Mario Angarita, Dario Arcos, Leonardo Eullides, Pablo Euillades, Cyrill Mueller, Lourdes Narvaez
2019, Book chapter, Reference Module in Earth Systems and Environmental Sciences
Whereas research in volcano geodesy seeks to push the boundaries of our knowledge of the physics of volcanoes, monitoring looks at changes in volcano behavior to predict when a volcanic crisis might develop. To be effective, geodetic monitoring must be done before, during, and after eruptions and must be...
From the oceans to the cloud: Opportunities and challenges for data, models, computation and workflows
Tiffany Vance, Micah Wengren, Eugene F. Burger, Debra Hernandez, Timothy Kearns, Encarni Medina-Lopez, Nazila Merati, Kevin O’Brien, Jonathan O’Neil, J. Potemra, Richard P. Signell, Kyle Wilcox
2019, Frontiers in Marine Science (6)
Advances in ocean observations and models mean increasing flows of data. Integrating observations between disciplines over spatial scales from regional to global presents challenges. Running ocean models and managing the results is computationally demanding. The rise of cloud computing presents an opportunity to rethink traditional approaches. This includes developing...
Optimizing an inner-continental shelf geologic framework investigation through data repurposing and machine learning
Elizabeth A. Pendleton, Laura L. Brothers, Ed Sweeney
2019, Geosciences (9)
The U.S. Geological Survey (USGS) and the National Oceanic Atmospheric Administration (NOAA) have collected approximately 5,400 km2 of geophysical and hydrographic data on the Atlantic continental shelf between Delaware and Virginia over the past decade and a half. Although originally acquired for different objectives, the comprehensive coverage and variety of...
The pathogenesis of H7 highly pathogenic avian influenza viruses in Lesser Scaup (Aythya affinis)
Christopher B. Stephens, Diann Prosser, Mary J. Pantin-Jackwood, Alicia Berlin, Erica Spackman
2019, Avian Diseases (63) 230-234
Waterfowl are the natural hosts of avian influenza virus (AIV), and through migration spread the virus worldwide. Most AIVs carried by wild waterfowl are low pathogenic strains; however, Goose/Guangdong/1996 lineage clade 2.3.4.4 H5 highly pathogenic (HP) AIV now appears to be endemic in wild birds in much of...
