Opal-A in glassy pumice, acid alteration, and the 1817 phreatomagmatic eruption at Kawah Ijen (Java), Indonesia
Jacob B. Lowenstern, Vincent van Hinsberg, Kim Berlo, Moritz Liesegang, Kayla D. Iacovino, Ilya N. Bindeman, Heather M. Wright
2018, Frontiers in Earth Science (6)
At Kawah Ijen (Indonesia), vigorous SO2 and HCl degassing sustains a hyperacid lake (pH ~0) and intensely alters the subsurface, producing widespread residual silica and advanced argillic alteration products. In 1817, a VEI 2 phreatomagmatic eruption evacuated the lake, depositing a widespread layer of muddy ash fall, and sending lahars down...
Development and characterization of two cell lines from gills of Atlantic salmon
Mona C. Gjessing, Maria Aamelfot, William N. Batts, Sylvie L. Benestad, Ole B. Dale, Even Thoen, Simon C. Weli, James R. Winton
2018, PLoS ONE (13) 1-13
Gill disease in Atlantic salmon, Salmo salar L., causes big losses in the salmon farming industry. Until now, tools to cultivate microorganisms causing gill disease and models to study the gill responses have been lacking. Here we describe the establishment and characterization of two cell lines from the gills of Atlantic salmon....
Postglacial eruptive history and geochemistry of Semisopochnoi volcano, western Aleutian Islands, Alaska
Michelle L. Coombs, Jessica F. Larsen, Christina A. Neal
2018, Scientific Investigations Report 2017-5150
Semisopochnoi Island, located in the Rat Islands group of the western Aleutian Islands and Aleutian volcanic arc, is a roughly circular island composed of scattered volcanic vents, the prominent caldera of Semisopochnoi volcano, and older, ancestral volcanic rocks. The oldest rocks on the island are gently radially dipping lavas that...
Assessment of undiscovered continuous oil and gas resources in the Hanoi Trough, Vietnam, 2017
Christopher J. Schenk, Marilyn E. Tennyson, Tracey J. Mercier, Cheryl A. Woodall, Phuong A. Le, Timothy R. Klett, Thomas M. Finn, Heidi M. Leathers-Miller, Stephanie B. Gaswirth, Kristen R. Marra
2018, Fact Sheet 2017-3086
Using a geology-based assessment methodology, the U.S. Geological Survey estimated mean undiscovered, technically recoverable continuous resources of 52 million barrels of oil and 591 billion cubic feet of gas in the Hanoi Trough of Vietnam....
On the depth extent of co-seismic rupture
Nicholas M. Beeler, G. Hirth, T.E. Tullis, C. H. Webb
2018, Bulletin of the Seismological Society of America (108) 761-780
We investigate the implications of deformation experiments for the coseismic down‐dip extent of rupture in quasi‐dynamic, whole‐cycle earthquake models of a fault for which the depth of the transition between seismic and aseisimic fault slip depends on strain rate. The calculations use a dislocation fault model from <a class="link link-ref xref-bibr"...
Iterative near-term ecological forecasting: Needs, opportunities, and challenges
Mike Dietze, Andrew Fox, Lindsay Beck-Johnson, Julio L. Betancourt, Mevin Hooten, Catherine S. Jarnevich, Timothy H. Keitt, Melissa A. Kenney, Christine M. Laney, Laurel G. Larsen, Henry W. Loescher, Claire K. Lunch, Bryan Pijanowski, James T. Randerson, Emily Read, Andrew T. Tredennick, Rodrigo Vargas, Kathleen C. Weathers, Ethan P. White
2018, Proceedings of the National Academy of Sciences of the United States of America (115) 1424-1432
Two foundational questions about sustainability are “How are ecosystems and the services they provide going to change in the future?” and “How do human decisions affect these trajectories?” Answering these questions requires an ability to forecast ecological processes. Unfortunately, most ecological forecasts focus on centennial-scale climate responses, therefore neither meeting...
Water pressure and ground vibrations induced by water guns near Brandon Road Lock and Dam and Lemont, Illinois
Ryan F. Adams, Carolyn M. Koebel, William S. Morrow
2018, Scientific Investigations Report 2017-5153
Multiple geophysical sensors were used to characterize the underwater pressure field and ground vibrations of a seismic water gun and its suitability to deter the movement of Asian carps (particularly the silver [Hypophthalmichthys molitrix] and bighead [Hypophthalmichthys nobilis] carps) while ensuring the integrity of surrounding structures. The sensors used...
Estimating floodwater depths from flood inundation maps and topography
Sagy Cohen, G. Robert Brakenridge, Albert Kettner, Bradford Bates, Jonathan M. Nelson, Richard R. McDonald, Yu-Fen Huang, Dinuke Munasinghe, Jiaqi Zhang
2018, Journal of the American Water Resources Association (54) 847-858
Information on flood inundation extent is important for understanding societal exposure, water storage volumes, flood wave attenuation, future flood hazard, and other variables. A number of organizations now provide flood inundation maps based on satellite remote sensing. These data products can efficiently and accurately provide the areal extent of a...
Preliminary flood-duration frequency estimates using naturalized streamflow records for the Willamette River Basin, Oregon
Greg D. Lind, Adam J. Stonewall
2018, Open-File Report 2018-1020
In this study, “naturalized” daily streamflow records, created by the U.S. Army Corps of Engineers and the Bureau of Reclamation, were used to compute 1-, 3-, 7-, 10-, 15-, 30-, and 60-day annual maximum streamflow durations, which are running averages of daily streamflow for the number of days in...
Stress rotation across the Cascadia megathrust requires a weak subduction plate boundary at seismogenic depths
Duo Li, Jeffrey J. McGuire, Yajing Liu, Jeanne L. Hardebeck
2018, Earth and Planetary Science Letters (485) 55-64
The Mendocino Triple Junction region is the most seismically active part of the Cascadia Subduction Zone. The northward moving Pacific plate collides with the subducting Gorda plate causing intense internal deformation within it. Here we show that the stress field rotates rapidly with depth across the thrust interface from a...
Beyond clay: Towards an improved set of variables for predicting soil organic matter content
Craig Rasmussen, Katherine Heckman, William R. Wieder, Marco Keiluweit, Corey R. Lawrence, Asmeret Asefaw Berhe, Joseph C. Blankinship, Susan E. Crow, Jennifer Druhan, Caitlin E. Hicks Pries, Erika Marin-Spiotta, Alain F. Plante, Christina Schadel, Joshua P. Schmiel, Carlos A. Sierra, Aaron Thompson, Rota Wagai
2018, Biogeochemistry (137) 297-306
Improved quantification of the factors controlling soil organic matter (SOM) stabilization at continental to global scales is needed to inform projections of the largest actively cycling terrestrial carbon pool on Earth, and its response to environmental change. Biogeochemical models rely almost exclusively on clay content to modify rates of SOM...
The metabolic regimes of flowing waters
Emily S. Bernhardt, Jim B. Heffernan, Nancy B. Grimm, Emily H. Stanley, Judson Harvey, M. Arroita, Alison P. Appling, M.J. Cohen, William H. McDowell, R.O. Hall, Jordan S. Read, B.J. Roberts, Edward G. Stets, Charles B. Yackulic
2018, Limnology and Oceanography (63) S99-S118
The processes and biomass that characterize any ecosystem are fundamentally constrained by the total amount of energy that is either fixed within or delivered across its boundaries. Ultimately, ecosystems may be understood and classified by their rates of total and net productivity and by the seasonal patterns of photosynthesis and...
Unique parasite aDNA in moa coprolites from New Zealand suggests mass parasite extinctions followed human-induced megafauna extinctions
Kevin D. Lafferty, Skylar R. Hopkins
2018, PNAS (115) 1411-1413
Having split early from Gondwana, Zealandia (now modern New Zealand) escaped discovery until the late 13th century, and therefore remains an important glimpse into a human-free world. Without humans or other land mammals, diverse and peculiar birds evolved in isolation, including several flightless moa species, the giant pouakai eagle (Harpagornis...
Evidence and opportunities for integrating landscape ecology into natural resource planning across multiple-use landscapes
E. Jamie Trammel, Sarah K. Carter, Travis S. Haby, Jason J. Taylor
2018, Current Landscape Ecology Reports (3) 1-11
Enhancing natural resource management has been a focus of landscape ecology since its inception, but numerous authors argue that landscape ecology has not yet been effective in achieving the underlying goal of planning and designing sustainable landscapes. We developed nine questions reflecting the application of fundamental research topics in landscape...
Coastal knickpoints and the competition between fluvial and wave-driven erosion on rocky coastlines
Patrick W. Limber, Patrick L. Barnard
2018, Geomorphology (306) 1-12
Active margin coastlines are distinguished by rock erosion that acts in two different directions: waves erode the coast horizontally or landwards, a process that creates sea cliffs; and rivers and streams erode the landscape vertically via channel incision. The relative rates of each process exert a dominant control on coastline...
Assessment of undiscovered oil and gas resources in the North-Central Montana Province, 2017
Christopher J. Schenk, Tracey J. Mercier, Michael E. Brownfield, Marilyn E. Tennyson, Cheryl A. Woodall, Phuong A. Le, Timothy R. Klett, Stephanie B. Gaswirth, Thomas M. Finn, Janet K. Pitman, Kristen R. Marra, Heidi M. Leathers-Miller
2018, Fact Sheet 2017-3092
Using a geology-based assessment methodology, the U.S. Geological Survey estimated mean undiscovered, technically recoverable resources of 55 million barrels of oil and 846 billion cubic feet of gas in the North-Central Montana Province....
Potential Longnose Darter population in the Kiamichi River of Oklahoma
C.T. Holley, James M. Long
2018, Proceedings of the Oklahoma Academy of Science (98) 14-17
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Pleistocene volcanism and shifting shorelines at Lake Tahoe, California
Winifred Kortemeier, Andrew T. Calvert, James G. Moore, Richard Schweickert
2018, Geosphere (14) 812-834
In the northwestern Lake Tahoe Basin, Pleistocene basaltic and trachyandesitic lavas form a small volcanic field comprising ∼1 km3 of lava that erupted from seven vents. Most of these lavas erupted subaerially and produced lava flows. However, where they flowed into an early Lake Tahoe (Proto-Tahoe), they produced deltas consisting of...
Resilience concepts in psychiatry demonstrated with bipolar disorder
David G. Angeler, Craig R. Allen, Maj-Liz Persson
2018, International Journal of Bipolar Disorders (6)
BackgroundThe term resilience describes stress–response patterns of subjects across scientific disciplines. In ecology, advances have been made to clearly distinguish resilience definitions based on underlying mechanistic assumptions. Engineering resilience (rebound) is used for describing the ability of subjects to recover from adverse conditions (disturbances), and is the rate...
Results of the 2010-2011 East-Central Adirondack Stream Survey (ECASS)
Gregory B. Lawrence, Scott D. George, Douglas A. Burns, Barry P. Baldigo, Sophia Passy, Karen M. Roy, Katrina L. Pound
2018, Report
No abstract available....
Development of a multimetric index for integrated assessment of salt marsh ecosystem condition
Jessica L. Nagel, Hilary A. Neckles, Glenn R. Guntenspergen, Erika N. Rocks, Donald Schoolmaster, James B. Grace, Dennis E. Skidds, Sara Stevens
2018, Estuaries and Coasts (41) 334-348
Tools for assessing and communicating salt marsh condition are essential to guide decisions aimed at maintaining or restoring ecosystem integrity and services. Multimetric indices (MMIs) are increasingly used to provide integrated assessments of ecosystem condition. We employed a theory-based approach that considers the multivariate relationship of metrics with human disturbance...
Mortality trends in northern sea otters (Enhydra lutris kenyoni) collected from the coasts of Washington and Oregon (2002–15)
C. LeAnn White, Emily W. Lankau, Deanna Lynch, Susan Knowles, Krysten L. Schuler, Jitender P. Dubey, Valerie I. Shearn-Bochsler, Marcos Isidoro Ayza, Nancy J. Thomas
2018, Journal of Wildlife Diseases (54) 238-247
During 2002−15 we examined the causes of mortality in a population of northern sea otters (Enhydra lutris kenyoni). Beachcast sea otters were collected primarily from the coast of Washington. Although there are no permanent sea otter residents in Oregon, several beachcast otters were collected from the Oregon coast. Infectious diseases...
Post-breeding migration and connectivity of red knots in the Western Atlantic
James E. Lyons, Bradford Winn, Timothy Keyes, Kevin S. Kalasz
2018, Journal of Wildlife Management (82) 383-396
Red knots (Calidris canutus rufa) have 3 distinct nonbreeding regions: 1 in the southeastern United States and Caribbean, another on the northeast coast of Brazil in the Maranhão region, and a third along the Patagonian coasts of Chile and Argentina. Effective conservation and recovery of this threatened long-distance migrant will...
Vegetation cover, tidal amplitude and land area predict short-term marsh vulnerability in Coastal Louisiana
Donald Schoolmaster, Camille L. Stagg, Leigh Anne Sharp, Tommy S. McGinnis, Bernard Wood, Sarai Piazza
2018, Ecosystems (21) 1335-1347
The loss of coastal marshes is a topic of great concern, because these habitats provide tangible ecosystem services and are at risk from sea-level rise and human activities. In recent years, significant effort has gone into understanding and modeling the relationships between the biological and physical factors that contribute to...
Distribution of effluent injected into the Boulder Zone of the Floridan aquifer system at the North District Wastewater Treatment Plant, southeastern Florida, 1997–2011
Jeffrey N. King, Jeremy D. Decker
2018, Scientific Investigations Report 2017-5145
Nonhazardous, secondarily treated, domestic wastewater (effluent) has been injected about 1 kilometer below land surface into the Boulder Zone of the Floridan aquifer system at the North District Wastewater Treatment Plant in southeastern Florida. The Boulder Zone contains saline, nonpotable water. Effluent transport out of the injection zone is a...
