Geomechanical analysis of initial stage of gas production from interbedded hydrate-bearing sediment
Jeen-Shang Lin, Shun Uchida, Evgeniy Myshakin, Yongkoo Seol, Jonny Rutqvist, Ray Boswell, William F. Waite, Junbong Jang, Timothy S. Collett
2017, Conference Paper
Geomechanical stability of marine hydrate reservoirs during gas production by depressurization is the focus of this study. The reservoir considered here consists of thin hydrate rich sandy layers interbedded with mud layers. Because of the input parameter uncertainties involved, it is prudent from a geomechanical perspective to estimate the likely...
Geology of Kasatochi Volcano, Aleutian Islands, Alaska
Christopher J. Nye, William E. Scott, Owen K Neill, Christopher F. Waythomas, Cheryl E. Cameron, Andrew T. Calvert
2017, Division of Geological & Geophysical Surveys Professional Report 123
Kasatochi is a small, isolated island volcano in the center of the Aleutian Island chain. It consists of a roughly circular cone ~3 km in diameter with a lake-filled central crater that is 1.2 km in diameter and extends from the highest point on the island to sea level. The...
Geophysical characterization of seismic station sites in the United States – The importance of a flexible, multi-method approach
Antony Martin, Alan Yong, William J. Stephenson, J. Boatwright, John Diehl
2017, Conference Paper
Noninvasive geophysical site characterization methods were used in two recent projects to obtain shear-wave velocity (VS) profiles to a minimum depth of 30 m and the time-averaged VS of the upper 30 meters (VS30) at seismic station sites. These projects include the 2009 American Recovery and Reinvestment Act (ARRA) funded...
Natural inquirer: The citizen science edition
Shonte Jenkins
2017, Book
People across the world are helping scientists collect data to answer important research questions. Learn how citizens are getting involved in science, from counting birds and lionfish to reporting earthquakes. All Over the Map, Citizen Science System, Device-ive Science, Invasion of the Song Snatcher, and Lion In Wait....
Preface: The lunar reconnaissance orbiter
John W Keller, Lisa R. Gaddis, Noah E. Petro, Oded Aharonson
2017, Icarus (298) 1-1
When the call for papers for a special issue of Icarus devoted to analysis of data from the Lunar Reconnaissance Orbiter mission was announced in March 2015 we envisioned a single issue with only a possibility of a second. We certainly were gratified by the response from within and outside...
Evidence that recent warming is reducing upper Colorado River flows
Gregory J. McCabe, David M. Wolock, Gregory T. Pederson, Connie A. Woodhouse, Stephanie A. McAfee
2017, Earth Interactions (21) 1-14
The upper Colorado River basin (UCRB) is one of the primary sources of water for the western United States, and increasing temperatures likely will elevate the risk of reduced water supply in the basin. Although variability in water-year precipitation explains more of the variability in water-year UCRB streamflow than water-year...
Effects of thermal variability on broadband seismometers: Controlled experiments, observations, and implications
Claire Doody, Adam T. Ringler, Robert E. Anthony, David C. Wilson, Austin Holland, Charles R. Hutt, Leo Sandoval
2017, Bulletin of the Seismological Society of America (108) 493-502
Isolating seismic instruments from temperature fluctuations is routine practice within the seismological community. However, the necessary degree of thermal stability required in broadband installations to avoid generating noise or compromising the fidelity in the seismic records is largely unknown and likely application dependent. To quantify the temperature sensitivity of seismometers...
Comparison of two viewing methods for estimating largemouth bass and walleye ages from sectioned otoliths and dorsal spines
Eric J. Wegleitner, Daniel A. Isermann
2017, North American Journal of Fisheries Management (37) 1304-1310
Many biologists use digital images for estimating ages of fish, but the use of images could lead to differences in age estimates and precision because image capture can produce changes in light and clarity compared to directly viewing structures through a microscope. We used sectioned sagittal otoliths from 132 Largemouth...
Foundations of translational ecology
Carolyn A. F. Enquist, Stephen T. Jackson, Gregg M. Garfin, Frank W. Davis, Leah R. Gerber, Jeremy Littell, Jennifer L. Tank, Adam Terando, Tamara U. Wall, Benjamin S. Halpern, J. Kevin Hiers, Toni L. Morelli, Elizabeth McNie, Nathan L. Stephenson, Matthew A. Williamson, Connie A. Woodhouse, Laurie Yung, Mark W. Brunson, Kimberly R. Hall, Lauren M. Hallett, Dawn M. Lawson, Max A. Moritz, Koren R. Nydick, Amber Pairis, Andrea J. Ray, Claudia M. Regan, Hugh D. Safford, Mark W. Schwartz, M. Rebecca Shaw
2017, Frontiers in Ecology and the Environment (15) 541-550
Ecologists who specialize in translational ecology (TE) seek to link ecological knowledge to decision making by integrating ecological science with the full complement of social dimensions that underlie today's complex environmental issues. TE is motivated by a search for outcomes that directly serve the needs of natural resource managers and...
Comment on linking the sex difference in PCB concentrations of fish to release of eggs at spawning: Time to jettison the dogma
Charles P. Madenjian
2017, Oceanography & Fisheries (5)
For the past 20 years or so, a commonly used explanation in the scientific literature for higher polychlorinated biphenyl (PCB) concentrations in male fish than in female fish has been that females lose a high proportion of their PCB body burden by releasing eggs at spawning time, and therefore the...
Building translational ecology communities of practice: insights from the field
Dawn M. Lawson, Kimberly R. Hall, Laurie Yung, Carolyn A. F. Enquist
2017, Frontiers in Ecology and the Environment (15) 569-577
Translational ecology (TE) prioritizes the understanding of social systems and decision contexts in order to address complex natural resource management issues. Although many practitioners in applied fields employ translational tactics, the body of literature addressing such approaches is limited. We present several case studies illustrating the principles of TE and...
Using carbon dioxide in fisheries and aquatic invasive species management
Hilary B. Treanor, Andrew M. Ray, Megan J. Layhee, Barnaby J. Watten, Jason A. Gross, Robert E. Gresswell, Molly A. H. Webb
2017, Fisheries (42) 621-628
To restore native fish populations, fisheries programs often depend on active removal of aquatic invasive species. Chemical removal can be an effective method of eliminating aquatic invasive species, but chemicals can induce mortality in nontarget organisms and persist in the environment. Carbon dioxide (CO2) is an emerging alternative to traditional...
Boiling-induced formation of colloidal gold in black smoker hydrothermal fluids
Amy Gartman, Mark Hannington, John W. Jamieson, Ben Peterkin, Dieter Garbe-Schonberg, Alyssa J Findlay, Sebastian Fuchs, Tom Kwasnitschka
2017, Geology (46) 39-42
Gold colloids occur in black smoker fluids from the Niua South hydrothermal vent field, Lau Basin (South Pacific Ocean), confirming the long-standing hypothesis that gold may undergo colloidal transport in hydrothermal fluids. Six black smoker vents, varying in temperature from 250 °C to 325 °C, were sampled; the 325 °C...
Investigating seagrass in Toxoplasma gondii transmission in Florida (Trichechus manatus latirostris) and Antillean (T. m. manatus) manatees
Heidi M. Wyrosdick, Richard W. Gerhold, Chunlei Su, Antonio A. Mignucci-Giannoni, Robert K. Bonde, Alycia Chapman, Carla Riviera-Perez, Jessica Martinez, Debra L. Miller
2017, Diseases of Aquatic Organisms (127) 65-69
Toxoplasma gondii is a feline protozoan reported to cause morbidity and mortality in manatees and other marine mammals. Given the herbivorous nature of manatees, ingestion of oocysts from contaminated water or seagrass is presumed to be their primary mode of infection. The objectives of this study were to investigate oocyst contamination...
Probabilistic tsunami hazard analysis: Multiple sources and global applications
Anita Grezio, Andrey Babeyko, Maria Ana Baptista, Jorn Behrens, Antonio Costa, Gareth Davies, Eric L. Geist, Sylfest Glimsdal, Frank I. Gonzalez, Jonathan Griffin, Carl B. Harbitz, Randall J. LeVeque, Stefano Lorito, Finn Løvholt, Rachid Omira, Christof Mueller, Raphael Paris, Thomas E. Parsons, Jascha Polet, William Power, Jacopo Selva, Mathilde B. Sorensen, Hong Kie Thio
2017, Reviews of Geophysics (55) 1158-1198
Applying probabilistic methods to infrequent but devastating natural events is intrinsically challenging. For tsunami analyses, a suite of geophysical assessments should be in principle evaluated because of the different causes generating tsunamis (earthquakes, landslides, volcanic activity, meteorological events, and asteroid impacts) with varying mean recurrence rates. Probabilistic Tsunami Hazard Analyses...
The effect of beaver ponds on water quality in rural coastal plain streams
Christopher W. Bason, Daniel Kroes, Mark M. Brinson
2017, Southeastern Naturalist (16) 584-602
We compared water-quality effects of 13 beaver ponds on adjacent free-flowing control reaches in the Coastal Plain of rural North Carolina. We measured concentrations of nitrate, ammonium, soluble reactive phosphorus (SRP), and suspended sediment (SS) upstream and downstream of paired ponds and control reaches. Nitrate and SS concentrations decreased, ammonium...
Do observed levels of exploitation from consumption-oriented and trophy-oriented fisheries reduce relative stock densities of Muskellunge below target levels in northern Wisconsin?
Matthew D. Faust, Michael J. Hansen
2017, Book chapter, Muskellunge management: Fifty years of cooperation among anglers, scientists, and fisheries biologists
Muskellunge anglers desire to catch large fish, and release rates by recreational anglers often approach 100% (Isermann et al. 2011). Muskellunge are also a culturally significant fish for Chippewa tribes and support a subsistence spearing fishery in Wisconsin’s Ceded Territory (Erickson 2007). Although Muskellunge populations within the state’s Ceded Territory...
Decaying lava extrusion rate at El Reventador Volcano, Ecuador measured using high-resolution satellite radar
D. W. D. Arnold, J. Biggs, Kyle R. Anderson, S. Vallejo Vargas, G. Wadge, S. K. Ebmeier, M. F. Naranjo, P. Mothes
2017, Journal of Geophysical Research B: Solid Earth (122) 9966-9988
Lava extrusion at erupting volcanoes causes rapid changes in topography and morphology on the order of tens or even hundreds of meters. Satellite radar provides a method for measuring changes in topographic height over a given time period to an accuracy of meters, either by measuring the width of radar...
Community tools for cartographic and photogrammetric processing of Mars Express HRSC images
Randolph L. Kirk, Elpitha Howington-Kraus, Kenneth L. Edmundson, Bonnie L. Redding, Donna M. Galuszka, Trent M. Hare, K. Gwinner
B. Wu, K. Di, J. Oberst, I. Karachevtseva, editor(s)
2017, Conference Paper, Proceedings: 2017 international symposium on planetary remote sensing and mapping (Volume XLII-3/W1)
The High Resolution Stereo Camera (HRSC) on the Mars Express orbiter (Neukum et al. 2004) is a multi-line pushbroom scanner that can obtain stereo and color coverage of targets in a single overpass, with pixel scales as small as 10 m at periapsis. Since commencing operations in 2004 it has imaged...
Sea turtles, light pollution, and citizen science: A preliminary report
Heather Afford, Susan Teel, Mark Nicholas, Thomas R. Stanley, Jeremy White
2017, Conference Paper, Connections across people, place, and time: Proceedings of the 2017 George Wright Society Conference on Parks, Protected Areas, and Cultural Sites
Sea turtles are an important ecological resource for Gulf Islands National Seashore’s (Gulf Islands) waters and shorelines. Regionally, sea turtles face anthropogenic threats from situations such as entanglement in fishing gear and ingestion of marine debris, as well as possible changes in sex ratios due to increasing temperatures related to human-induced...
Reviews and syntheses: Field data to benchmark the carbon cycle models for tropical forests
Deborah A. Clark, Shinichi Asao, Rosie A. Fisher, Sasha C. Reed, Peter B. Reich, Michael G. Ryan, Tana E. Wood, Xiaojuan Yang
2017, Biogeosciences (14) 4663-4690
For more accurate projections of both the global carbon (C) cycle and the changing climate, a critical current need is to improve the representation of tropical forests in Earth system models. Tropical forests exchange more C, energy, and water with the atmosphere than any other class of land ecosystems. Further,...
Northern hemisphere jet stream positions indices as diagnostic tools for climate and ecosystem dynamics
Soumaya Belmecheri, Flurin Babst, Amy R. Hudson, Julio L. Betancourt, Valerie Trouet
2017, Earth Interactions (21) 1-23
The latitudinal position of the Northern Hemisphere jet stream (NHJ) modulates the occurrence and frequency of extreme weather events. Precipitation anomalies in particular are associated with NHJ variability; the resulting floods and droughts can have considerable societal and economic impacts. This study develops a new climatology of the 300-hPa NHJ...
Ad hoc instrumentation methods in ecological studies produce highly biased temperature measurements
Adam J. Terando, Elsa Youngsteadt, Emily K. Meineke, Sara G. Prado
2017, Ecology and Evolution (7) 9890-9904
In light of global climate change, ecological studies increasingly address effects of temperature on organisms and ecosystems. To measure air temperature at biologically relevant scales in the field, ecologists often use small, portable temperature sensors. Sensors must be shielded from solar radiation to provide accurate temperature measurements, but our review...
Spatial mismatch between sea lamprey behaviour and trap location explains low success at trapping for control
Andrew M. Rous, Adrienne R. McLean, Jessica Barber, Gale Bravener, Theodore Castro-Santos, Christopher M. Holbrook, Istvan Imre, Thomas C. Pratt, Robert L. McLaughlin
2017, Canadian Journal of Fisheries and Aquatic Sciences (74) 2085-2097
Crucial to the management of invasive species is understanding space use and the environmental features affecting space use. Improved understanding of space use by invasive sea lamprey (Petromyzon marinus) could help researchers discern why trap success in large rivers is lower than needed for effective control. We tested whether manipulating...
Possible behavioural, energetic and demographic effects of displacement of red-throated divers
Volker Dierschke, Robert W. Furness, Carrie E. Gray, Ib Krag Petersen, Joel A. Schmutz, Ramunas Zydelis, Francis Daunt
2017, U.K. Joint Nature Conservation Committee Report 605
This report comprises the main points of discussion and agreement during a workshop, held in Edinburgh in May 2017, to discuss how displacement might affect individuals and the Red-throated diver population; with additional information added by the scientists following the workshop....
