A spaceborne inventory of volcanic activity in Antarctica and southern oceans, 2000-10
Matthew R. Patrick, John L. Smellie
2015, Antarctic Science (25) 475-500
Of the more than twenty historically active volcanoes in Antarctica and the sub-Antarctic region only two, to our knowledge, host any ground-based monitoring instruments. Moreover, because of their remoteness, most of the volcanoes are seldom visited, thus relegating the monitoring of volcanism in this region almost entirely to satellites. In...
The use of wavenumber normalization in computing spatially averaged coherencies (KRSPAC) of microtremor data from asymmetric arrays
M.W. Asten, William J. Stephenson, Stephen H. Hartzell
2015, Conference Paper
The SPAC method of processing microtremor noise observations for estimation of Vs profiles has a limitation that the array has circular or triangular symmetry in order to allow spatial (azimuthal) averaging of inter-station coherencies over a constant station separation. Common processing methods allow for station separations to vary by typically...
Estimating evapotranspiration and groundwater flow from water-table fluctuations for a general wetland scenario
Martha L. Carlson Mazur, Michael J. Wiley, Douglas A. Wilcox
2015, Ecohydrology (7) 378-390
The use of diurnal water-table fluctuation methods to calculate evapotranspiration (ET) and groundwater flow is of increasing interest in ecohydrological studies. Most studies of this type, however, have been located in riparian wetlands of semi-arid regions where groundwater levels are consistently below topographic surface elevations and precipitation events are infrequent....
Geohydrologic and water-quality characterization of a fractured-bedrock test hole in an area of Marcellus shale gas development, Tioga County, Pennsylvania
John H. Williams, Dennis W. Risser, Clifford H. Dodge
2015, Open-File Report 15-24.0
An integrated analysis of core, geophysical logs, gas isotopes, and specific-depth water-quality samples from the Cherry Flats test hole was used to characterize the stratigraphy, water-bearing zones, and groundwater quality at a site in southern Tioga County, Pennsylvania. The study was completed as a cooperative effort between the Pennsylvania Department...
Evaluation of four suture materials for surgical incision closure in Siberian sturgeon
S. Shaun Boone, Sonia M. Hernandez, Alvin C. Camus, Douglas C. Peterson, Cecil A. Jennings, James L. Shelton, Stephen J. Divers
2015, Transactions of the American Fisheries Society (142) 649-659
The visual and microscopic tissue reactions to the absorbable monofilament Monocryl, absorbable monofilament triclosan-coated Monocryl-Plus, absorbable multifilament Vicryl, and nonabsorbable monofilament Prolene were evaluated for their use of surgical closure in Siberian Sturgeon Acipenser baerii. Postoperative assessments were conducted at 1, 2, 8, 12, and 26 and 55 weeks to visually...
Pathologic and physiologic effects associated with long-term intracoelomic transmitters in captive Siberian sturgeon
S. Shaun Boone, Stephen J. Divers, Alvin C. Camus, Douglas C. Peterson, Cecil A. Jennings, James L. Shelton, Sonia M. Hernandez
2015, North American Journal of Fisheries Management (33) 869-877
Intracoelomic transmitters are commonly used to evaluate migratory patterns, distribution, and habitat use of many species of fish. Currently, transmitter implantation relies mostly on the assumption that transmitters do not cause any adverse physiological or pathological effects on the animal. To investigate these effects, we surgically implanted 60 Siberian Sturgeon...
Sequence stratigraphic framework of upper pliocene to holocene sediments of the Los Angeles Basin, California: Implications for aquifer architecture
Kenneth D. Ehman, Brian D. Edwards, Daniel J. Ponti
2015, Book
Executive Summary Groundwater provides more than one-third of the municipal water supply for the coastal Los Angeles Basin and defining the aquifer architecture is a high priority for ground-water managers. Sequence stratigraphy, the state-of-the-art method for delineating reservoir geometry and continuity in the petroleum industry, is now being incorporated into ground water...
Deep-Water Acoustic Anomalies from Methane Hydrate in the Bering Sea
Warren T. Wood, Ginger A. Barth, David W. Scholl, Nina Lebedeva-Ivanova
2015, Report, NRL Review
A recent expedition to the central Bering Sea, one of the most remote locations in the world, has yielded observations confirming gas and gas hydrates in this deep ocean basin. Significant sound speed anomalies found using inversion of pre-stack seismic data are observed in association with variable seismic amplitude anomalies in...
Limnology of the Green Lakes Valley: Phytoplankton ecology and dissolved organic matter biogeochemistry at a long-term ecological research site
Matthew P. Miller, Diane M. McKnight
2015, Plant Ecology and Diversity (8) 689-702
Background: Surface waters are the lowest points in the landscape, and therefore serve as excellent integrators and indicators of changes taking place in the surrounding terrestrial and atmospheric environment.Aims: Here we synthesise the findings of limnological studies conducted during the past 15 years in streams and lakes in the Green...
East versus West: organic contaminant differences in brown pelican (Pelecanus occidentalis) eggs from South Carolina, USA and the Gulf of California, Mexico
Stacy S. Vander Pol, Daniel W. Anderson, Patrick G.R. Jodice, Joyce E. Stuckey
2015, Science of the Total Environment (438) 527-532
Brown pelicans (Pelecanus occidentalis) were listed as endangered in the United States in 1970, largely due to reproductive failure and mortality caused by organochlorine contaminants, such as DDT. The southeast population, P.o. carolinensis, was delisted in 1985, while the west coast population, P.o. californicus, was not delisted until 2009. As fish-eating coastal...
Climate-induced changes in lake ecosystem structure inferred from coupled neo- and paleoecological approaches
Jasmine E. Saros, Jeffery R. Stone, Gregory T. Pederson, Krista Slemmons, Trisha Spanbauer, Anna Schliep, Douglas Cahl, Craig E. Williamson, Daniel R. Engstrom
2015, Ecology (93) 2155-2164
Over the 20th century, surface water temperatures have increased in many lake ecosystems around the world, but long-term trends in the vertical thermal structure of lakes remain unclear, despite the strong control that thermal stratification exerts on the biological response of lakes to climate change. Here we used both neo-...
Visualizing impact structures using high-resolution LiDAR-derived DEMs: A case study of two structures in Missouri
Michael P. Finn, Gary W. Krizanich, Kevin R. Evans, Melissa R. Cox, Kristina H. Yamamoto
2015, Surveying and Land Information Science (72) 87-97
Evidence suggests that a crypto-explosive hypothesis and a meteorite impact hypothesis may be partly correct in explaining several anomalous geological features in the middle of the United States. We used a primary geographic information science (GIScience) technique of creating a digital elevation model (DEM) of two of these features that...
How to build and teach with QuakeCaster: an earthquake demonstration and exploration tool
Kelsey Linton, Ross S. Stein
2015, Open-File Report 2011-1158
QuakeCaster is an interactive, hands-on teaching model that simulates earthquakes and their interactions along a plate-boundary fault. QuakeCaster contains the minimum number of physical processes needed to demonstrate most observable earthquake features. A winch to steadily reel in a line simulates the steady plate tectonic motions far from the plate...
Family Bovidae (Hollow-horned Ruminants)
Colin P. Groves, David M. Leslie Jr., Brent A. Huffman, Raul Valdez, Khushal Habibi, Paul Weinberg, James Burton, Peter Jarman, William Robichaud
2015, Book chapter, Handbook of Mammals of the World, Vol. II Hoofed Mammals
Probably the single most eye-catching aspect of the current volume is the explosion of species recognized in the family Bovidae (Hollow-horned Ruminants). In 2005, the third edition of Mammal Species of the World listed 143 species in 50 genera of Bovidae. That list, prepared by the late Peter Grubb, was...
An interpolation method for stream habitat assessments
Kenneth R. Sheehan, Stuart A. Welsh
2015, North American Journal of Fisheries Management (29) 1-9
Interpolation of stream habitat can be very useful for habitat assessment. Using a small number of habitat samples to predict the habitat of larger areas can reduce time and labor costs as long as it provides accurate estimates of habitat. The spatial correlation of stream habitat variables such as substrate...
The transboundary nature of seabird ecology
Patrick G.R. Jodice, Robert M. Suryan
2015, Book chapter, Landscape-scale conservation planning
The term ‘seabird’ is generally applied to avian species that forage in the marine environment over open water. Seabirds typically nest in colonies and are long-lived species with low annual reproductive rates. Seabird breeding sites typically occur on islands or along coasts and as such are often at the boundaries...
Markov decision processes in natural resources management: observability and uncertainty
Byron K. Williams
2015, Ecological Modelling (220) 830-840
The breadth and complexity of stochastic decision processes in natural resources presents a challenge to analysts who need to understand and use these approaches. The objective of this paper is to describe a class of decision processes that are germane to natural resources conservation and management, namely Markov decision processes,...
Brood rearing ecology of King Eiders breeding on the North Slope of Alaska
Laura M. Phillips, Abby N. Powell
2015, Wilson Journal of Ornithology (121) 430-434
Association of anatase (TiO2) and microbes: unusual fossilization effect or a potential biosignature?
Mihaela Glamoclija, Andrew Steele, Marc Fries, Juergen Schieber, Mary A. Voytek, Charles S. Cockell
2015, Geological Society of America Bulletin (458) 965-975
We combined microbial paleontology and molecular biology methods to study the Eyreville B drill core from the 35.3-Ma-old Chesapeake Bay impact structure,Virginia, USA. The investigated sample is a pyrite vein collected from the 1353.81-1353.89 m depth interval, located within a section of biotite granite. The granite is a pre-impact rock...
The role of floodplain restoration in mitigating flood risk, Lower Missouri River, USA
Robert B. Jacobson, Garth A. Lindner, Chance Bitner
Paul F. Hudson, Hans Middelkoop, editor(s)
2015, Book chapter, Geomorphic approaches to integrated floodplain management of lowland fluvial systems in North America and Europe
Recent extreme floods on the Lower Missouri River have reinvigorated public policy debate about the potential role of floodplain restoration in decreasing costs of floods and possibly increasing other ecosystem service benefits. The first step to addressing the benefits of floodplain restoration is to understand the interactions of flow, floodplain...
Hindcast of water availability in regional aquifer systems using MODFLOW Farm Process
Wolfgang Schmid, Randall T. Hanson, Claudia C. Faunt, Steven P. Phillips
2015, Conference Paper, Predictions for hydrology, ecology, and water resources management: Using data and models to benefit society
Coupled groundwater and surface-water components of the hydrologic cycle can be simulated by the Farm Process for MODFLOW (MF-FMP) in both irrigated and non-irrigated areas and aquifer-storage and recovery systems. MF-FMP is being applied to three productive agricultural regions of different scale in the State of California, USA, to assess...
Forecasting the combined effects of urbanization and climate change on stream ecosystems: from impacts to management options
Karen C. Nelson, Margaret A. Palmer, James E. Pizzuto, Glenn E. Moglen, Paul L. Angermeier, Robert H. Hilderbrand, Mike Dettinger, Katharine Hayhoe
2015, Journal of Applied Ecology (46) 154-163
Streams collect runoff, heat, and sediment from their watersheds, making them highly vulnerable to anthropogenic disturbances such as urbanization and climate change. Forecasting the effects of these disturbances using process-based models is critical to identifying the form and magnitude of likely impacts. Here, we integrate a new biotic model with...
Dealing with largemouth bass virus: benefits of multisector collaboration
David R. Terre, Harold Schramm Jr., John M. Grizzle, Loraine T. Fries
2015, Conference Paper, Proceedings of the annual conference southeastern association of fish and wildlife agencies
Largemouth bass virus (LMBV), a recently identified pathogen, affected largemouth bass (Micropterus salmoides) in the southeastern United States beginning in the 1990s. Concern about the impacts of this little-known pathogen on largemouth bass populations, effects on fisheries management, and the need to provide anglers and the media with consistent and...
National Field Manual for the Collection of Water-Quality Data. U.S. Geological Survey Techniques of Water-Resources Investigations, Book 9
2015, Techniques of Water-Resources Investigations 09
The mission of the Water Resources Discipline of the U.S. Geological Survey (USGS) is to provide the information and understanding needed for wise management of the Nation's water resources. Inherent in this mission is the responsibility to collect data that accurately describe the physical, chemical, and biological attributes of water...
General classification handbook for floodplain vegetation in large river systems
Jennifer J. Dieck, Janis Ruhser, Erin E. Hoy, Larry R. Robinson
2015, Techniques and Methods 2-A1
This handbook describes the General Wetland Vegetation Classification System developed as part of the U.S. Army Corps of Engineers’ Upper Mississippi River Restoration (UMRR) Program, Long Term Resource Monitoring (LTRM) element. The UMRR is a cooperative effort between the U.S. Army Corps of Engineers, U.S. Geological Survey, U.S. Fish and...
