Origin of the pulse-like signature of shallow long-period volcano seismicity
Bernard A. Chouet, Phillip B. Dawson
2016, Journal of Geophysical Research B: Solid Earth (121) 5931-5941
Short-duration, pulse-like long-period (LP) events are a characteristic type of seismicity accompanying eruptive activity at Mount Etna in Italy in 2004 and 2008 and at Turrialba Volcano in Costa Rica and Ubinas Volcano in Peru in 2009. We use the discrete wave number method to compute the free surface response...
Insights into plant water uptake from xylem-water isotope measurements in two tropical catchments with contrasting moisture conditions
Jaivime Evaristo, Jeffrey J. McDonnell, Martha A. Scholl, L. Adrian Bruijnzeel, Kwok P. Chun
2016, Hydrological Processes (30) 3210-3227
Water transpired by trees has long been assumed to be sourced from the same subsurface water stocks that contribute to groundwater recharge and streamflow. However, recent investigations using dual water stable isotopes have shown an apparent ecohydrological separation between tree-transpired water and stream water. Here we present evidence for such...
The influence of vegetation cover on debris-flow density during an extreme rainfall in the northern Colorado Front Range
Francis K. Rengers, Luke McGuire, Jeffrey A. Coe, Jason W. Kean, Rex L. Baum, Dennis M. Staley, Jonathan W. Godt
2016, Geology (44) 823-826
We explored regional influences on debris-flow initiation throughout the Colorado Front Range (Colorado, USA) by exploiting a unique data set of more than 1100 debris flows that initiated during a 5 day rainstorm in 2013. Using geospatial data, we examined the influence of rain, hillslope angle, hillslope aspect, and vegetation...
Smokey comes of age: Unmanned aerial systems for fire management
Dirac Twidwell, Craig R. Allen, Carrick Detweiler, James Higgins, Christian Laney, Sebastian Elbaum
2016, Frontiers in Ecology and the Environment (14) 333-339
During the past century, fire management has focused on techniques both to protect human communities from catastrophic wildfire and to maintain fire-dependent ecological systems. However, despite a large and increasing allocation of resources and personnel to achieve these goals, fire management objectives at regional to global scales are not being...
Transmission of influenza reflects seasonality of wild birds across the annual cycle
Nichola J. Hill, Brandt W. Meixell, Eric J. Ma, Mark S. Lindberg, Walter M. Boyce, Jonathan A. Runstadler
2016, Ecology Letters (19) 915-925
Influenza A Viruses (IAV) in nature must overcome shifting transmission barriers caused by the mobility of their primary host, migratory wild birds, that change throughout the annual cycle. Using a phylogenetic network of viral sequences from North American wild birds (2008–2011) we demonstrate a shift from intraspecific to interspecific transmission...
Synchrony of Piping Plover breeding populations in the U.S. Northern Great Plains
Erin A. Roche, Terry L. Shaffer, Colin M. Dovichin, Mark H. Sherfy, Michael J. Anteau, Mark T. Wiltermuth
2016, Condor (118) 558-570
Local populations that fluctuate synchronously are at a greater risk of extinction than those that do not. The closer the geographic proximity of populations, the more prone they are to synchronizing. Shorebird species select habitat broadly, and many breed across regions with diverse nesting habitat types. Under these conditions, nearby...
Advancing environmental flow science: Developing frameworks for altered landscapes and integrating efforts across disciplines.
Shannon K. Brewer, Ryan A. McManamay, Andrew D. Miller, Robert Mollenhauer, Thomas A. Worthington, Tom Arsuffi
2016, Environmental Management (58) 175-192
Environmental flows represent a legal mechanism to balance existing and future water uses and sustain non-use values. Here, we identify current challenges, provide examples where they are important, and suggest research advances that would benefit environmental flow science. Specifically, environmental flow science would benefit by (1) developing approaches...
Overwintering strategies of migratory birds: a novel approach for estimating seasonal movement patterns of residents and transients
Viviana Ruiz-Gutierrez, William L. Kendall, James F. Saracco, Gary C. White
2016, Journal of Applied Ecology (53) 1035-1045
Our understanding of movement patterns in wildlife populations has played an important role in current ecological knowledge and can inform landscape conservation decisions. Direct measures of movement can be obtained using marked individuals, but this requires tracking individuals across a landscape or multiple sites.We demonstrate how movements...
Seasonal movements and habitat use of Potamodromous Rainbow Trout across a complex Alaska riverscape
Kevin M. Fraley, Jeffrey A. Falke, Richard Yanusz, Sam S. Ivey
2016, Transactions of the American Fisheries Society (145) 1077-1092
Potamodromous Rainbow Trout Oncorhynchus mykiss are an important ecological and recreational resource in freshwater ecosystems of Alaska, and increased human development, hydroelectric projects, and reduced escapement of Chinook Salmon Oncorhynchus tshawytscha may threaten their populations. We used aerial and on-the-ground telemetry tracking, a digital landscape model, and resource selection functions...
Microbial pathogens in source and treated waters from drinking water treatment plants in the United States and implications for human health
Dawn N. King, Maura J. Donohue, Stephen J. Vesper, Eric N. Villegas, Michael W. Ware, Megan E. Vogel, Edward Furlong, Dana W. Kolpin, Susan T. Glassmeyer, Stacy Pfaller
2016, Science of the Total Environment (562) 987-995
An occurrence survey was conducted on selected pathogens in source and treated drinking water collected from 25 drinking water treatment plants (DWTPs) in the United States. Water samples were analyzed for the protozoa Giardia and Cryptosporidium (EPA Method 1623); the fungi Aspergillus fumigatus, Aspergillus niger and Aspergillus terreus (quantitative PCR...
Geochemistry of the Black Sea during the last 15 kyr: A protracted evolution of its hydrography and ecology
David Z. Piper
2016, Paleoceanography (31) 1117-1137
The Black Sea is a 2200 m deep anoxic, marine sea connected to the Mediterranean Sea via the Dardanelles Strait, Marmara Sea, and the 3 km wide, 35 m deep Bosphorus Strait. The biogeochemistry of sediment from the Anatolia slope has recorded changes to the hydrography leading up to and following the input...
Comparisons between vs30 and spectral response for 30 sites in Newcastle, Australia from collocated seismic cone penetrometer, active- and passive-source vs data
Theodora Volti, David Burbidge, Clive Collins, Michael W. Asten, Jackson K. Odum, William J. Stephenson, Chris Pascal, Josef Holzschuh
2016, Bulletin of the Seismological Society of America (106) 1690-1709
Although the time‐averaged shear‐wave velocity down to 30 m depth (VS30) can be a proxy for estimating earthquake ground‐motion amplification, significant controversy exists about its limitations when used as a single parameter for the prediction of amplification. To examine this question in absence of relevant strong‐motion records, we use a range...
Complex explosive volcanic activity on the Moon within Oppenheimer crater
Kristen A Bennett, Briony H. N. Horgan, Lisa R. Gaddis, Benjamin T Greenhagen, Carlton C. Allen, Paul O. Hayne, James F. Bell, David A. Paige
2016, Icarus (273) 296-314
Oppenheimer Crater is a floor-fractured crater located within the South Pole-Aitken basin on the Moon, and exhibits more than a dozen localized pyroclastic deposits associated with the fractures. Localized pyroclastic volcanism on the Moon is thought to form as a result of intermittently explosive Vulcanian eruptions under low effusion rates,...
Geochemistry, petrologic evolution, and ore deposits of the Miocene Bodie Hills Volcanic Field, California and Nevada
Edward A. du Bray, David A. John, Brian L. Cousens, Leslie A. Hayden, Peter G. Vikre
2016, American Mineralogist (101) 644-677
The southern segment of the ancestral Cascades magmatic arc includes numerous volcanic fields; among these, the Bodie Hills volcanic field (BHVF), astride the California-Nevada border north of Mono Lake, is one of the largest (>700 km2) and most well studied. Episodic magmatism in the BHVF spanned about 9 million years...
On the deterministic and stochastic use of hydrologic models
William H. Farmer, Richard M. Vogel
2016, Water Resources Research (52) 5619-5633
Environmental simulation models, such as precipitation-runoff watershed models, are increasingly used in a deterministic manner for environmental and water resources design, planning, and management. In operational hydrology, simulated responses are now routinely used to plan, design, and manage a very wide class of water resource systems. However, all such models...
First record of the common sandpiper for the Hawaiian Islands
Thane K. Pratt
2016, Western Birds (47) 167-169
With a breeding range spanning Eurasia and a winter range extending from Africa to Australasia, the Common Sandpiper (Actitis hypoleucos) is indeed the common and familiar sandpiper of the Old World. It is the Old World counterpart of the Spotted Sandpiper (A. macularius) of the Americas and its only congener....
Managing water and riparian habitats on the Bill Williams River with scientific benefit for other desert river systems
John Hickey, Woodrow Fields, Andrew Hautzinger, Steven Sesnie, Patrick B. Shafroth, Dick Gilbert
2016, Report
This report details modeling to: 1) codify flow-ecology relationships for riparian species of the Bill Williams River as operational guidance for water managers, 2) test the guidance under different climate scenarios, and 3) revise the operational guidance as needed to address the effects of climate change. Model applications detailed herein...
Budgets and chemical characterization of groundwater for the Diamond Valley flow system, central Nevada, 2011–12
David L. Berger, C. Justin Mayers, C. Amanda Garcia, Susan G. Buto, Jena M. Huntington
2016, Scientific Investigations Report 2016-5055
The Diamond Valley flow system consists of six hydraulically connected hydrographic areas in central Nevada. The general down-gradient order of the areas are southern and northern Monitor Valleys, Antelope Valley, Kobeh Valley, Stevens Basin, and Diamond Valley. Groundwater flow in the Diamond Valley flow system terminates at a large playa...
Observations of cocooned Hydrobaenus (Diptera: Chironomidae) larvae in Lake Michigan
Taaja R. Tucker, Patrick L. Hudson, Stephen Riley
2016, Journal of Great Lakes Research (42) 1129-1135
Larvae of the family Chironomidae have developed a variety of ways to tolerate environmental stress, including the formation of cocoons, which allows larvae to avoid unfavorable temperature conditions, drought, or competition with other chironomids. Summer cocoon formation by younger instars of the genus Hydrobaenus Fries allows persistence through increased temperatures and/or intermittent...
Hydrogeologic investigations of the Miocene Nogales Formation in the Nogales Area, Upper Santa Cruz Basin, Arizona
William R. Page, Floyd Gray, Mark W. Bultman, Christopher M. Menges
2016, Scientific Investigations Report 2016-5087
Hydrogeologic investigations were conducted to evaluate the groundwater resource potential for the Miocene Nogales Formation in the Nogales area, southern Arizona. Results indicate that parts of the formation may provide new, deeper sources of groundwater for the area. Geologic mapping determined the hydrogeologic framework of the formation by defining lithologic,...
ChemCam activities and discoveries during the nominal mission of the Mars Science Laboratory in Gale crater, Mars
Sylvestre Maurice, Samuel M. Clegg, Roger C. Wiens, O. Gasnault, W. Rapin, O. Forni, Agnes Cousin, V. Sautter, Nicolas Mangold, L. Le Deit, Marion Nachon, Ryan B. Anderson, Nina Lanza, Cecile Fabre, Valerie Payre, Jeremie Lasue, Pierre-Yves Meslin, Richard A. LeVeille, Bruce Barraclough, Pierre Beck, Steven C. Bender, Gilles Berger, John C. Bridges, Nathan Bridges, Gilles Dromert, M. Darby Dyar, Raymond Francis, Jens Frydenvang, B. Gondet, Bethany L. Ehlmann, Kenneth E. Herkenhoff, Jeffrey R. Johnson, Yves Langevin, Madsen Morten B., N. Melikechi, J.-L. Lacour, Stephane Le Mouelic, Eric Lewin, Horton E. Newsom, Ann M. Ollila, Patrick Pinet, S. Schroder, Jean-Baptiste Sirven, Robert L. Tokar, M.J. Toplis, Claude d’Uston, David Vaniman, Ashwin R. Vasavada
2016, Journal of Analytical Atomic Spectrometry (31) 863-889
At Gale crater, Mars, ChemCam acquired its first laser-induced breakdown spectroscopy (LIBS) target on Sol 13 of the landed portion of the mission (a Sol is a Mars day). Up to Sol 800, more than 188 000 LIBS spectra were acquired on more than 5800 points distributed over about 650 individual...
Soil data for a vegetation gradient located at Bonanza Creek Long Term Ecological Research Site, interior Alaska
Kristen L. Manies, Jennifer W. Harden, Christopher C. Fuller, Xiaomei Xu, John P. McGeehin
2016, Open-File Report 2016-1034
Boreal soils play an important role in the global carbon cycle owing to the large amount of carbon stored within this northern region. To understand how carbon and nitrogen storage varied among different ecosystems, a vegetation gradient was established in the Bonanza Creek Long Term Ecological Research (LTER) site,...
Seasonal flux and assemblage composition of planktic foraminifera from the northern Gulf of Mexico, 2008–14
Caitlin E. Reynolds, Julie N. Richey
2016, Open-File Report 2016-1115
The U.S. Geological Survey anchored a sediment trap in the northern Gulf of Mexico in January 2008 to collect seasonal time-series data on the flux and assemblage composition of live planktic foraminifers. This report provides an update of the previous time-series data to include continuous results from January 2013 through...
Osmoregulatory physiology and rapid evolution of salinity tolerance in threespine stickleback recently introduced to fresh water
Jeffrey N Divino, Michelle Y. Monette, Stephen D. McCormick, Paul H. Yancey, Kyle G. Flannery, Michael A. Bell, Jennifer L. Rollins, Frank A. von Hippel, Eric T. Schultz
2016, Evolutionary Ecology Research (17) 179-201
Background: Post-Pleistocene diversification of threespine stickleback in fresh water offers a valuable opportunity to study how changes in environmental salinity shape physiological evolution in fish. In Alaska, the presence of both ancestral oceanic populations and derived landlocked populations, including recent lake introductions, allows us to examine rates and direction of evolution...
Ordinary kriging as a tool to estimate historical daily streamflow records
William H. Farmer
2016, Hydrology and Earth System Sciences (20) 2721-2735
Efficient and responsible management of water resources relies on accurate streamflow records. However, many watersheds are ungaged, limiting the ability to assess and understand local hydrology. Several tools have been developed to alleviate this data scarcity, but few provide continuous daily streamflow records at individual streamgages within an entire region....
