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10895 results.

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Page 76, results 1876 - 1900

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Not all publications have extents, not all extents are completely accurate
Digital database of the geologic map of the middle east rift geothermal subzone, Kīlauea Volcano, Hawai‘i
Michael H. Zoeller, Frank A. Trusdell, Richard B. Moore
2019, Data Series 1111
This database release contains all the information used to produce Geologic Investigations Series I-2614 (https://pubs.usgs.gov/imap/2614/). The main component of this digital release is a geodatabase prepared using ArcGIS, but Esri shapefiles are included as well.Kīlauea is an active shield volcano in the southeastern part of the...
Influence of fire refugia spatial pattern on post-fire forest recovery in Oregon’s Blue Mountains
William M Downing, Meg A. Krawchuk, Garrett W Meigs, Sandra L. Haire, Jonathan D. Coop, Ryan B Walker, Ellen Whitman, Geneva W. Chong, Carol Miller
2019, Landscape Ecology (34) 771-792
ContextFire regimes in many dry forests of western North America are substantially different from historical conditions, and there is concern about the ability of these forests to recover following severe wildfire. Fire refugia, unburned or low-severity burned patches where trees survived fire, may serve as essential propagule sources...
Geology and biostratigraphy of the Upper Floridan aquifer in the greater Savannah region, Georgia and South Carolina
Jean Self-Trail, Mercer Parker, John T. Haynes, Arthur P. Schultz, Paul. F. Huddleston
2019, Stratigraphy (16) 41-62
The Upper Floridan aquifer (UFA) of South Carolina, Georgia, Alabama, Mississippi, and Florida has been considered a regionally continuous stratigraphic sequence of Eocene to Miocene carbonate strata, with documented unconformities based on lithology and biostratigraphy.  As part of an investigation of the regional subsurface geologic framework in the Atlantic Coastal...
Igneous rocks in the Fish Creek Mountains and environs, Battle Mountain area, north-central Nevada: A microcosm of Cenozoic igneous activity in the northern Great Basin, Basin and Range Province, USA
Brian L. Cousens, Christopher D. Henry, Christopher Stevens, Susan Varve, David A. John, Stacey Wetmore
2019, Earth Science Reviews (192) 403-444
The Great Basin of the western United States, the northern component of the Basin and Range Province, is a region of Cenozoic lithospheric extension with multiple periods and types of igneous activity. The composition and volume of Cenozoic magmas reflect a complex interaction between mantle-derived magmas and highly diverse crust, where...
Emerging investigator series: Atmospheric cycling of indium in the northeastern United States
Sarah Jane White, Harold F. Hemond
2019, Environmental Science: Processes and Impacts (21) 623-634
Indium is critical to the global economy and is used in an increasing number of electronics and new energy technologies. However, little is known about its environmental behavior or impacts, including its concentrations or cycling in the atmosphere. This study determined indium concentrations in air particulate matter at five locations...
Geology of the Hardeeville NW Quadrangle and parts of the Brighton and Pineland Quadrangles, Jasper County, South Carolina
Christopher S. Swezey, Arthur P. Schultz, William R. Doar III, Christopher P. Garrity, Christopher E. Bernhardt, E. Allen Crider, Jr., Lucy E. Edwards, John P. McGeehin
2019, Scientific Investigations Map 3424
IntroductionThis publication portrays the geology of the Hardeeville NW quadrangle and parts of the Brighton and Pineland quadrangles that are within Jasper County, South Carolina. The study area is located in the Atlantic Coastal Plain province, approximately 50 to 70 kilometers (km) inland from the coast. The data are compiled...
Establishing molecular methods to quantitatively profile gastric diet items of fish—Application to the invasive blue catfish (ictalurus furcatus)
Deborah D. Iwanowicz, W. Bane Schill, Lakyn R. Sanders, Tim Groves, Mary C. Groves
2019, Open-File Report 2019-1021
Understanding the diet of invasive species helps researchers to more accurately assess the health, survivorship, growth, and stability of an invasive fish species, as well as their effects on native populations. Techniques capable of identifying multiple prey species from fish stomach contents have been developed. In this study, a multi-locus...
Methane emissions from groundwater pumping in the USA
Justin T. Kulongoski, Peter B. McMahon
2019, Climate and Atmospheric Science (2) 1-8
Atmospheric methane accumulation contributes to climate change, hence quantifying methane emissions is essential to assess and model the impacts. Here we estimate methane emissions from groundwater pumping in the Los Angeles Basin (LAB), north-eastern Pennsylvania, and the Principal aquifers of the USA using the average concentrations of methane in groundwater...
Invasive buffelgrass detection using high-resolution satellite and UAV imagery on Google Earth Engine
Kaitlyn Elkind, Temuulen T. Sankey, Seth M. Munson, Clare E. Aslan
2019, Remote Sensing in Ecology and Conservation (5) 318-331
Methods to detect and monitor the spread of invasive grasses are critical to avoid ecosystem transformations and large economic costs. The rapid spread of non‐native buffelgrass(Pennisetum ciliare) has intensified fire risk and is replacing fire intolerant native vegetation in the Sonoran Desert of the southwestern US. Coarse‐resolution satellite imagery has had...
Regeneration of Metrosideros polymorpha forests in Hawaii after landscape‐level canopy dieback
Linda Mertelmeyer, James D. Jacobi, Dieter Mueller-Dombois, Kevin W. Brinck, Hans Juergen Boehmer
2019, Journal of Vegetation Science (30) 146-155
Questions(a) Have Metrosideros polymorpha trees become re‐established in Hawaiian forests previously impacted by canopy dieback in the 1970s? (b) Has canopy dieback expanded since the 1970s? (c) Can spatial patterns from this dieback be correlated with habitat factors to model future dieback in this area?<p class="article-section__sub-title...
Discovery of an extensive deep-sea fossil serpulid reef associated with a cold seep, Santa Monica Basin, California
Magdalena N Georgieva, Charles K. Paull, Crispin TS Little, Mary McGann, Diana Sahy, Daniel Condon, Lonny Lundsten, Jack Pewsey, David W Caress, Robert C Vrijenhoek
2019, Frontiers in Marine Science
Multi-beam mapping of the Santa Monica Basin in the eastern Pacific has revealed the existence of a number of elevated bathymetric features, or mounds, harboring cold seep communities. During 2013-2014, mounds at ~600 m water depth were observed for the first time and sampled by Monterey Bay Aquarium Research Institute’s...
Relationships between diatom metrics based on species nutrient traits and agricultural land use
Robert Pillsbury, R. Jan Stevenson, Mark D. Munn, Ian R. Waite
2019, Environmental Monitoring and Assessment (191)
We assessed how diatom metrics were related to different ranges of agricultural land use. Diatom assemblage composition, nutrients, and landscape characteristics were determined at 232 sites in eight agriculturally dominated study areas of the continental United States. Two regional groups based on differences in diatom relations to human disturbance were...
The Missouri groundwater-level observation network
David C. Smith
2019, Fact Sheet 2019-3009
The Missouri groundwater-level observation well network is a series of wells across the State of Missouri in which groundwater levels are monitored in real time and periodically. The wells monitor the water levels in multiple key aquifers, such as the Ozark aquifer in the Salem and Springfield Plateaus and the...
Hawaiian hoary bat acoustic monitoring on U.S. Army O`ahu facilities
Frank Bonaccorso, Kristina Montoya-Aiona, Corinna A. Pinzari
2019, Hawaii Cooperative Studies Unit Technical Report 089
Acoustic sampling for occurrence of the endangered Hawaiian hoary bat (Lasiurus cinereus semotus) was conducted at 12 locations on U. S. Army installations on O‘ahu Island, Hawai‘i. Bats were confirmed as present at 10 of these locations: Dillingham Military Reservation, Helemano Military Reservation, Kahuku Training Area, Kawailoa Training Area, Mākua...
Understanding organic matter heterogeneity and maturation rate by Raman spectroscopy
Seyedalireza Khatibi, Mehdi Ostadhassan, Paul C. Hackley, David Tuschel, Arash Abarghani, Bailey Bubach
2019, International Journal of Coal Geology (206) 46-64
Solid organic matter (OM) in sedimentary rocks produces petroleum and solid bitumen when it undergoes thermal maturation. The solid OM is a ‘geomacromolecule’, usually representing a mixture of various organisms with distinct biogenic origins, and can have high heterogeneity in composition. Programmed pyrolysis is a common method to reveal bulk geochemical characteristics of...
Climate, streamflow, and lake-level trends in the Great Lakes Basin of the United States and Canada, water years 1960–2015
Parker A. Norton, Daniel G. Driscoll, Janet M. Carter
2019, Scientific Investigations Report 2019-5003
Water levels in the Great Lakes fluctuate substantially because of complex interactions among inputs (precipitation and streamflow), outputs (evaporation and outflow), and other factors. This report by the U.S. Geological Survey in cooperation with the Great Lakes Restoration Initiative was completed to describe trends in climate, streamflow, lake levels, and...
Assessment of skin and liver neoplasms in white sucker (Catostomus commersonii) collected in the Sheboygan River Area of Concern, Wisconsin, in 2017
Vicki S. Blazer, Heather L. Walsh, Ryan P. Braham, Patricia M. Mazik
2019, Open-File Report 2019-1014
Two hundred adult white sucker (Catostomus commersonii), age 3 years and older, were collected from the lower Sheboygan River Area of Concern in 2017, during the spring spawning run. Fish were euthanized, weighed, and measured, and any visible abnormalities were documented. Pieces of raised skin lesions as well as five...
Diversity and abundance of wild bees in an agriculturally dominated landscape of eastern Colorado
H. S. Arathi, Mark W. Vandever, Brian S. Cade
2019, Journal of Insect Conservation (23) 187-197
Agricultural intensification has resulted in loss of natural and semi-natural habitats impacting several important ecosystem services. One group of organisms that has suffered greatly are the bees and hence pollination, the supporting ecosystem service they complete. The United States Department of Agriculture (USDA) Conservation Reserve Program (CRP) has implemented conservation...
Comparison of aquatic invertebrate communities in near-shore areas with high or low boating activity
Bradley Smith, Steven R. Chipps, Jeff Grote, Jake Mecham, Tanner M. Stevens, Tobias Rapp
2019, Journal of Freshwater Ecology (34) 189-198
Lakeshore areas provide important habitat for aquatic invertebrates in shallow lakes. However, these zones are prone to anthropogenic disturbances that include shoreline development, urbanization, nutrient inputs, agricultural and(or) recreational use. Among recreational uses, public access sites are often developed to accommodate boaters and facilitate lake access via...
An introduced breeding population of Chrysemys picta marginata in the Kaibab National Forest, northern Arizona
Jeffrey E. Lovich, Bruce L. Christman, Kristy L. Cummings, Jenna Norris, Shellie R. Puffer, Christina Jones
2019, Current Herpetology (38) 91-98
The painted turtle (Chrysemys picta) is widely distributed from coast to coast in North America with each of four subspecies generally occupying different regions. In the southwestern USA and northern Mexico, where C. p. bellii is the expected native race, populations are small and widelyscattered. Introduced populations of other painted turtle subspecies...
Structure contour and overburden maps of the Niobrara interval of the Upper Cretaceous Cody Shale in the Wind River Basin, Wyoming
Thomas M. Finn
2019, Scientific Investigations Map 3427
The Wind River Basin in central Wyoming is one of many structural and sedimentary basins that formed in the Rocky Mountain foreland during the Laramide orogeny. The basin is bounded by the Washakie, Owl Creek, and southern Bighorn uplifts on the north, the Casper arch on the east, the Granite Mountains uplift on...
Spatial and temporal variability of harmful algal blooms in Milford Lake, Kansas, May through November 2016
Guy M. Foster, Jennifer L. Graham, Lindsey R. King
2019, Scientific Investigations Report 2018-5166
The U.S. Geological Survey, in cooperation with the Kansas Department of Health and Environment (KDHE), completed a study to quantify the spatial and temporal variability of cyanobacterial blooms in Milford Lake, Kansas, over a range of environmental conditions at various time scales (hours to months). A better understanding of the...
Assessing the lead solubility potential of untreated groundwater of the United States
Bryant Jurgens, David L. Parkhurst, Kenneth Belitz
2019, Environmental Science & Technology (53) 3095-3103
In the U.S., about 44 million people rely on self-supplied groundwater for drinking water. Because most self-supplied homeowners do not treat their water to control corrosion, drinking water can be susceptible to lead (Pb) contamination from metal plumbing. To assess the types and locations of susceptible groundwater, a geochemical reaction...
An assessment of plant species differences on cellulose oxygen isotopes from two Kenai Peninsula, Alaska peatlands: Implications for hydroclimatic reconstructions
Miriam Jones, Lesleigh Anderson, Katherine Keller, Bailey Nash, Virginia Littell, Matthew J. Wooller, Chelsea Jolley
2019, Frontiers in Earth Science (7)
Peat cores are valuable archives of past environmental change because they accumulate plant organic matter over millennia. While studies have primarily focused on physical, ecological, and some biogeochemical proxies, cores from peatlands have increasingly been used to interpret hydroclimatic change using stable isotope analyses of cellulose preserved in plant remains....
Isotopic and petrologic investigation, and a thermomechanical model of genesis of large-volume rhyolites in arc environments: Karymshina Volcanic Complex, Kamchatka, Russia
Ilya N. Bindeman, Vladimir L. Leonov, Dylan P. Colon, Aleksey N. Rogozin, Niccole Shipley, Brian Jicha, Matthew W. Loewen, Taras V. Gerya
2019, Frontiers in Earth Science (6)
The Kamchatka Peninsula of eastern Russia is currently one of the most volcanically active areas on Earth where a combination of >8 cm/yr subduction convergence rate and thick continental crust generates large silicic magma chambers, reflected by abundant large calderas and caldera complexes. This study examines the largest center of...