Who Knew? Inconnu
F. Joseph Margraf
2016, Fisheries (41) 70-70
In 1999, I moved to Alaska to serve as unit leader of the U.S. Geological Survey Alaska Cooperative Fish and Wildlife Research Unit and professor of fisheries in the School of Fisheries and Ocean Sciences at the University of Alaska Fairbanks. What was unusual about this move was that before...
Dynamic occupancy models for explicit colonization processes
Kristin M. Broms, Mevin Hooten, Devin S. Johnson, Res Altwegg, Loveday Conquest
2016, Ecology (97) 194-204
The dynamic, multi-season occupancy model framework has become a popular tool for modeling open populations with occupancies that change over time through local colonizations and extinctions. However, few versions of the model relate these probabilities to the occupancies of neighboring sites or patches. We present a modeling framework that incorporates...
Migratory corridors of adult female Kemp’s ridley turtles in the Gulf of Mexico
Donna J. Shaver, Kristen M. Hart, Ikuko Fujisaki, Cynthia Rubio, Autumn R. Sartain-Iverson, Jaime Pena, Daniel Gomez Gamez, Raul de Jesus Gonzales Diaz Miron, Patrick M. Burchfield, Hector J. Martinez, Jaime Ortiz
2016, Biological Conservation (194) 158-167
For many marine species, locations of migratory pathways are not well defined. We used satellite telemetry and switching state-space modeling (SSM) to define the migratory corridor used by Kemp's ridley turtles (Lepidochelys kempii) in the Gulf of Mexico. The turtles were tagged after nesting at Padre Island National Seashore, Texas,...
Recent rates of carbon accumulation in montane fens ofYosemite National Park, California, U.S.A.
Judith Z. Drexler, Christopher C. Fuller, James L. Orlando, Peggy E. Moore
2016, Arctic, Antarctic, and Alpine Research (47) 657-659
Little is known about recent rates of carbon storage in montane peatlands, particularly in the western United States. Here we report on recent rates of carbon accumulation (past 50 to 100 years) in montane groundwater-fed peatlands (fens) of Yosemite National Park in central California, U.S.A. Peat cores were collected at...
Evaluating geothermal and hydrogeologic controls on regional groundwater temperature distribution
Erick R. Burns, Steven E. Ingebritsen, Michael Manga, Colin F. Williams
2016, Water Resources Research (52) 1328-1344
A one-dimensional (1-D) analytic solution is developed for heat transport through an aquifer system where the vertical temperature profile in the aquifer is nearly uniform. The general anisotropic form of the viscous heat generation term is developed for use in groundwater flow simulations. The 1-D solution is extended to more...
Differences in impacts of Hurricane Sandy on freshwater swamps on the Delmarva Peninsula, Mid−Atlantic Coast, USA
Beth A. Middleton
2016, Ecological Engineering (87) 62-70
Hurricane wind and surge may have different influences on the subsequent composition of forests. During Hurricane Sandy, while damaging winds were highest near landfall in New Jersey, inundation occurred along the entire eastern seaboard from Georgia to Maine. In this study, a comparison of damage from salinity intrusion vs. wind/surge...
Quantifying pollen-vegetation relationships to reconstruct ancient forests using 19th-century forest composition and pollen data
Andria Dawson, Christopher J. Paciorek, Jason S. McLachlan, Simon Goring, John W. Williams, Stephen T. Jackson
2016, Quaternary Science Reviews (137) 156-175
Mitigation of climate change and adaptation to its effects relies partly on how effectively land-atmosphere interactions can be quantified. Quantifying composition of past forest ecosystems can help understand processes governing forest dynamics in a changing world. Fossil pollen data provide information about past forest composition,...
Density, distribution, and genetic structure of grizzly bears in the Cabinet-Yaak Ecosystem
Katherine C. Kendall, Amy C. Macleod, Kristina L. Boyd, John Boulanger, J. Andrew Royle, Wayne F. Kasworm, David Paetkau, Michael F. Proctor, Tabitha A. Graves, Kim Annis
2016, Journal of Wildlife Management (80) 314-331
The conservation status of the 2 threatened grizzly bear (Ursus arctos) populations in the Cabinet-Yaak Ecosystem (CYE) of northern Montana and Idaho had remained unchanged since designation in 1975; however, the current demographic status of these populations was uncertain. No rigorous data on population density and distribution or analysis of...
Fertility of the early post-eruptive surfaces of Kasatochi Island volcano
G. J. Michaelson, Bronwen Wang, C. L. Ping
2016, Arctic, Antarctic, and Alpine Research (48) 45-59
In the four years after the 2008 eruption and burial of Kasatochi Island volcano, erosion and the return of bird activity have resulted in new and altered land surfaces and initiation of ecosystem recovery. We examined fertility characteristics of the recently deposited pyroclastic surfaces, patches of legacy pre-eruptive surface soil...
Ungulate reproductive parameters track satellite observations of plant phenology across latitude and climatological regimes
David Stoner, Joseph O. Sexton, Jyoteshwar Nagol, Heather H. Bernales, Thomas C. Edwards Jr.
2016, PLoS ONE (11) 1-19
The effect of climatically-driven plant phenology on mammalian reproduction is one key to predicting species-specific demographic responses to climate change. Large ungulates face their greatest energetic demands from the later stages of pregnancy through weaning, and so in seasonal environments parturition dates should match periods of high primary productivity. Interannual...
Mountain pine beetle host selection between lodgepole and ponderosa pines in the southern Rocky Mountains
Daniel R. West, Jenny S. Briggs, William R. Jacobi, Jose F. Negron
2016, Environmental Entomology (45) 127-141
Recent evidence of range expansion and host transition by mountain pine beetle ( Dendroctonus ponderosae Hopkins; MPB) has suggested that MPB may not primarily breed in their natal host, but will switch hosts to an alternate tree species. As MPB populations expanded in lodgepole pine forests in the southern Rocky Mountains, we...
Salinity effects on plasma ion levels, cortisol, and osmolality in Chinook salmon following lethal sampling
Heather Stewart, David L. G. Noakes, Karen M. Cogliati, James T. Peterson, Martin H. Iversen, Carl B. Schreck
2016, Comparative Biochemistry and Physiology, Part A: Molecular & Integrative Physiology (192) 38-43
Studies on hydromineral balance in fishes frequently employ measurements of electrolytes following euthanasia. We tested the effects of fresh- or salt-water euthanasia baths of tricaine mesylate (MS-222) on plasma magnesium (Mg2+) and sodium (Na+) ions, cortisoland osmolality in fish exposed to saltwater challenges, and the ion and steroid hormone fluctuations over time...
Book review: Mineral resource estimation
Mark J. Mihalasky
2016, Economic Geology (111) 272-274
Mineral Resource Estimation is about estimating mineral resources at the scale of an ore deposit and is not to be mistaken with mineral resource assessment, which is undertaken at a significantly broader scale, even if similar data and geospatial/geostatistical methods are used. The book describes geological, statistical, and geostatistical tools...
Mapping extent and change in surface mines within the United States for 2001 to 2006
Christopher E. Soulard, William Acevedo, Stephen V. Stehman, Owen P. Parker
2016, Land Degradation and Development (27) 248-257
A complete, spatially explicit dataset illustrating the 21st century mining footprint for the conterminous United States does not exist. To address this need, we developed a semi-automated procedure to map the country's mining footprint (30-m pixel) and establish a baseline to monitor changes in mine extent over time. The process...
Constraints on the source parameters of low-frequency earthquakes on the San Andreas Fault
Amanda M. Thomas, Gregory C. Beroza, David R. Shelly
2016, Geophysical Research Letters (43) 1464-1471
Low-frequency earthquakes (LFEs) are small repeating earthquakes that occur in conjunction with deep slow slip. Like typical earthquakes, LFEs are thought to represent shear slip on crustal faults, but when compared to earthquakes of the same magnitude, LFEs are depleted in high-frequency content and have lower corner frequencies, implying longer...
A decision support tool for adaptive management of native prairie ecosystems
Victoria M. Hunt, Sarah Jacobi, Jill J. Gannon, Jennifer E. Zorn, Clinton T. Moore, Eric V. Lonsdorf
2016, Interfaces (46) 334-344
The Native Prairie Adaptive Management initiative is a decision support framework that provides cooperators with management-action recommendations to help them conserve native species and suppress invasive species on prairie lands. We developed a Web-based decision support tool (DST) for the U.S. Fish and Wildlife Service and the U.S. Geological Survey...
The road to Yucca Mountain—Evolution of nuclear waste disposal in the United States
John S. Stuckless, Robert A. Levich
2016, Environmental & Engineering Geoscience (22) 1-25
The generation of electricity by nuclear power and the manufacturing of atomic weapons have created a large amount of spent nuclear fuel and high-level radioactive waste. There is a world-wide consensus that the best way to protect mankind and the environment is to dispose of this waste in a deep...
Corrigendum to “Widespread occurrence of (per)chlorate in the Solar System” [Earth Planet. Sci. Lett. 430 (2015) 470–476]
W. Andrew Jackson, Alfonso F. Davila, Derek W. G. Sears, John D. Coates, Christopher P. McKay, Maeghan Brundrett, Nubia Estrada, J.K. Bohlke
2016, Earth and Planetary Science Letters (436) 142-143
The authors regret that two sets of data (Atacama (Rao et al., 2010) and Mars Meteorite Range (Kounaves et al., 2014)) in Fig. 2 of our article were plotted in the wrong units. The correction does not change the relationship between ClO<mrow...
Lithospheric rheology constrained from twenty-five years of postseismic deformation following the 1989 Mw 6.9 Loma Prieta earthquake
Mong-Han Huang, Roland Burgmann, Frederick Pollitz
2016, Earth and Planetary Science Letters (435) 147-158
The October 17, 1989 Mw 6.9 Loma Prieta earthquake provides the first opportunity of probing the crustal and upper mantle rheology in the San Francisco Bay Area since the 1906 Mw 7.9 San Francisco earthquake. Here we use geodetic observations including GPS and InSAR to characterize...
At the foot of the smoking mountains: The 2014 scientific investigations in the Islands of the Four Mountains
Virginia Hatfield, Kale Bruner, Dixie West, Arkady Savinetsky, Olga Krylovich, Bulat Khasanov, Dmitry Vasyukov, Zhanna Antipushina, Mitsuru Okuno, Susan Crockford, Kirsten Nicolaysen, Breanyn MacInnes, Lyman Persico, Pavel Izbekov, Christina A. Neal, Thomas Bartlett III, Lydia Loopesko, Anne Fulton
2016, Arctic Anthropology (53) 141-159
An interdisciplinary research team conducted archaeological, geological, and biological investigations in the Islands of the Four Mountains, Alaska during the summer of 2014 as part of a three-year project to study long-term geological and ecological patterns and processes with respect to human settlement. Researchers investigated three archaeological sites on Chuginadak...
Estimating golden-cheeked warbler immigration: Implications for the spatial scale of conservation
A. Duarte, F.W. Weckerly, M. Schaub, Jeffrey S. Hatfield
2016, Animal Conservation (19) 65-74
Understanding the factors that drive population dynamics is fundamental to species conservation and management. Since the golden-cheeked warbler Setophaga chrysoparia was first listed as endangered, much effort has taken place to monitor warbler abundance, occupancy, reproduction and survival. Yet, despite being directly related to local population dynamics, movement rates have...
Monogenetic volcanoes fed by interconnected dikes and sills in the Hopi Buttes volcanic field, Navajo Nation, USA
James D. Muirhead, Alexa R. Van Eaton, Giuseppe Re, James D. L. White, Michael H. Ort
2016, Bulletin of Volcanology (78) 1-16
Although monogenetic volcanic fields pose hazards to major cities worldwide, their shallow magma feeders (<500 m depth) are rarely exposed and, therefore, poorly understood. Here, we investigate exposures of dikes and sills in the Hopi Buttes volcanic field, Arizona, to shed light on the nature of its magma feeder system. Shallow...
Analysis of brook trout spatial behavior during passage attempts in corrugated culverts using near-infrared illumination video imagery
Normand E. Bergeron, Pierre-Marc Constantin, Elsa Goerig, Theodore R. Castro-Santos
2016, Conference Paper
We used video recording and near-infrared illumination to document the spatial behavior of brook trout of various sizes attempting to pass corrugated culverts under different hydraulic conditions. Semi-automated image analysis was used to digitize fish position at high temporal resolution inside the culvert, which allowed calculation of various spatial behavior...
An assessment of the cultivated cropland class of NLCD 2006 using a multi-source and multi-criteria approach
Patrick Danielson, Limin Yang, Suming Jin, Collin G. Homer, Darrell Napton
2016, Remote Sensing (8)
We developed a method that analyzes the quality of the cultivated cropland class mapped in the USA National Land Cover Database (NLCD) 2006. The method integrates multiple geospatial datasets and a Multi Index Integrated Change Analysis (MIICA) change detection method that captures spectral changes to identify the spatial distribution and...
Avian response to fire in pine–oak forests of Great Smoky Mountains National Park following decades of fire suppression
Eli T. Rose, Theodore R. Simons
2016, The Condor (118) 179-193
Fire suppression in southern Appalachian pine–oak forests during the past century dramatically altered the bird community. Fire return intervals decreased, resulting in local extirpation or population declines of many bird species adapted to post-fire plant communities. Within Great Smoky Mountains National Park, declines have been strongest for birds inhabiting xeric...
