Feeding ecology and niche overlap of Lake Ontario offshore forage fish assessed with stable isotopes
James Mumby, Timothy Johson, Thomas Stewart, Edward Halfyard, Maureen Walsh, Brian Weidel, Jana Lantry, Aarron Fisk
2017, Canadian Journal of Fisheries and Aquatic Sciences (75) 759-771
The forage fish communities of the Laurentian Great Lakes continue to experience changes that have altered ecosystem structure, yet little is known about how they partition resources. Seasonal, spatial and body size variation in δ13C and δ15N was used to assess isotopic niche overlap and resource and habitat partitioning among...
Detection of microcystin and other cyanotoxins in lakes at Isle Royale National Park, Pictured Rocks National Lakeshore, and Sleeping Bear Dunes National Lakeshore, northern Michigan, 2012–13
Lori M. Fuller, Angela K. Brennan, Lisa R. Fogarty, Keith A. Loftin, Heather E. Johnson, David D. VanderMeulen, Brenda Moraska Lafrancois
2017, Scientific Investigations Report 2017-5122
Although cyanotoxins released during algal blooms have become an increasing concern in surface waters across the United States, the presence of cyanotoxins in northern Michigan lakes had not been evaluated in detail. The U.S. Geological Survey and National Park Service (NPS) led a 2-year study (2012 and 2013) to determine...
Colloid mobilization and seasonal variability in a semiarid headwater stream
Taylor J. Mills, Suzanne P. Ancerson, Carleton R. Bern, Arnulfo Aguirre, Louis A. Derry
2017, Journal of Environmental Quality (46) 88-95
Colloids can be important vectors for the transport of contaminants in the environment, but little is known about colloid mobilization at the watershed scale. We present colloid concentration, composition, and flux data over a large range of hydrologic conditions from a small watershed (Gordon Gulch) in the foothills of the...
Observations and first reports of saprolegniosis in Aanaakłiq, broad whitefish (Coregonus nasus), from the Colville River near Nuiqsut, Alaska
Todd L. Sformo, Billy Adams, John C. Seigle, Jayde A. Ferguson, Maureen K. Purcell, Raphaela Stimmelmayr, Joseph H. Welch, Leah M. Ellis, Jason C. Leppi, John C. George
2017, Polar Science (14) 78-82
We report the first confirmed cases (2013–2016) of saprolegniosis caused by water mold from the genus Saprolegnia in Aanaakłiq, broad whitefish (Coregonus nasus), from the Colville River near Nuiqsut, Alaska. While this mold is known to be worldwide, these instances represent the first cases in Nuiqsut and only the second instance on...
Modeling fine-scale coral larval dispersal and interisland connectivity to help designate mutually-supporting coral reef marine protected areas: Insights from Maui Nui, Hawaii
Curt D. Storlazzi, Maarten van Ormondt, Yi-Leng Chen, Edwin P. L. Elias
2017, Frontiers in Marine Science (4)
Connectivity among individual marine protected areas (MPAs) is one of the most important considerations in the design of integrated MPA networks. To provide such information for managers in Hawaii, USA, a numerical circulation model was developed to determine the role of ocean currents in transporting coral larvae from natal reefs...
Evidence for the interior evolution of Ceres from geologic analysis of fractures
Jennifer E. C. Scully, Debra Buczkowski, Nico Schmedemann, Carol A. Raymond, Julie C. Castillo-Rogez, Scott King, Michael T. Bland, Anton Ermakov, D.P. O’Brien, S. Marchi, A. Longobardo, C.T. Russell, R.R. Fu, M. Neveu
2017, Geophysical Research Letters (44) 9564-9572
Ceres is the largest asteroid belt object, and the Dawn spacecraft observed Ceres since 2015. Dawn observed two morphologically distinct linear features on Ceres's surface: secondary crater chains and pit chains. Pit chains provide unique insights into Ceres's interior evolution. We interpret pit chains called the Samhain Catenae as the...
Assessing the global distribution of river fisheries harvest: A systematic map protocol
Chelsie Romulo, Zeenatul Basher, Abigail Lynch, Yu-Chun Kao, William W. Taylor
2017, Environmental Evidence (6)
BackgroundAlthough surface freshwater comprises < 0.01% of the total water volume of earth, freshwater inland capture fisheries and aquaculture represent 40% of the global reported finfish harvest. While the social, economic, and ecological importance of inland fish and fisheries is difficult to overstate, they are often undervalued and underappreciated....
Paleoceanographic perspectives on Arctic Ocean change
Emily Osborne, Thomas M. Cronin, Jesse Farmer
2017, Report
The Arctic Ocean is presently experiencing changes in ocean temperature and sea ice extent that are unprecedented in the observational time period (satellite observations: 1979-Present). To provide context for the current changes, scientists turn to paleo records of past climate to document and study natural variability in the Arctic system....
New method to integrate remotely sensed hydrothermal alteration mapping into quantitative mineral resource assessments
John C. Mars, Jane M. Hammarstrom, Gilpin R. Robinson Jr., Stephen Ludington, Lukas Zurcher, Helen W. Folger, Mark E. Gettings, Federico Solano, Thomas Kress
2017, Conference Paper
Hydrothermal alteration data mapped using the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) were compiled into hydrothermal alteration polygons for use in an assessment of porphyry copper mineral resource potential in the southwestern United States. Hydrothermal alteration polygons along with geochemistry, gravity and magnetic, lithologic,...
A pesticide paradox: Fungicides indirectly increase fungal infections
Jason R. Rohr, Jenise Brown, William A. Battaglin, Teagan A. McMahon, Rick A. Reylea
2017, Ecological Applications (27) 2290-2302
There are many examples where the use of chemicals have had profound unintended consequences, such as fertilizers reducing crop yields (paradox of enrichment) and insecticides increasing insect pests (by reducing natural biocontrol). Recently, the application of agrochemicals, such as agricultural disinfectants and fungicides, has been explored as an approach to...
Ecology of the Sand Roller (Percopsis transmontana) in a lower Snake River Reservoir, Washington
Kenneth F. Tiffan, John M. Erhardt, Tobyn N. Rhodes, Rulon J. Hemingway
2017, Northwestern Naturalist (98) 203-214
The Sand Roller (Percopsis transmontana), has not been abundant in the Snake River since it was first found in the system in the 1950s, but its population has apparently increased in recent years. As a result, we initiated a study to better understand its ecology in habitats of Lower Granite...
Evaluating methods to assess the body condition of female polar bears
Anthony M. Pagano, Karyn D. Rode, Stephen N. Atkinson
2017, Ursus (28) 171-181
An animal's body condition provides insight into its health, foraging success, and overall fitness. Measures of body composition including proportional fat content are useful indicators of condition. Isotopic dilution is a reliable non-destructive method for estimating the body composition of live mammals, but can require prolonged handling times. Alternatively, bioelectrical...
Simulated juvenile salmon growth and phenology respond to altered thermal regimes and stream network shape
Aimee H. Fullerton, Brian J. Burke, Joshua J. Lawler, Christian E. Torgersen, Joseph L. Ebersole, Scott G. Leibowitz
2017, Ecosphere (8)
It is generally accepted that climate change will stress coldwater species such as Pacific salmon. However, it is unclear what aspect of altered thermal regimes (e.g., warmer winters, springs, summers, or increased variability) will have the greatest effect, and what role the spatial properties of river networks play. Thermally diverse...
Balancing research and service to decision makers
Jeremy S. Littell, Adam J. Terando, Toni Lyn Morelli
2017, Frontiers in Ecology and the Environment (15) 598-598
No abstract available....
The efficacy of combined educational and site management actions in reducing off-trail hiking in an urban-proximate protected area
Karen S. Hockett, Jeffrey L. Marion, Yu-Fai Leung
2017, Journal of Environmental Management (203) 17-28
Park and protected area managers are tasked with protecting natural environments, a particularly daunting challenge in heavily visited urban-proximate areas where flora and fauna are already stressed by external threats. In this study, an adaptive management approach was taken to reduce extensive off-trail hiking along a popular trail through an...
Can thermoluminescence be used to determine soil heating from a wildfire?
Francis K. Rengers, Vasilis Pagonis, Shannon A. Mahan
2017, Radiation Measurements (107) 119-127
The Silverado wildfire occurred from September 12 to 20, 2014, burning 960 acres in Orange County, California. Soil samples from within the burn area were obtained and the thermoluminescence (TL) properties of those samples were compared against a control sample to understand wildfire heating. We performed a series of experiments...
3D Pressure‐limited approach to model and estimate CO2 injection and storage capacity: saline Mount Simon Formation
Hossein Jahediesfanjani, Peter D. Warwick, Steven T. Anderson
2017, Greenhouse Gases: Science and Technology (7) 1080-1096
To estimate the carbon dioxide (CO2) injection and storage capacity of saline formations, we used Tough2‐ECO2N simulation software to develop a pressure‐limited (dynamic) simulation approach based on applying three‐dimensional (3D) numerical simulation only on the effective injection area (Aeff) surrounding each injection well. A statistical analysis was performed to account...
Tectonic evolution of the Central Andean Plateau and implications for the growth of plateaus
Carmala N. Garzione, Nadine McQuarrie, Nicholas D. Perez, Todd A. Ehlers, Susan L. Beck, Nandini Kar, Nathan Eichelberger, Alan D. Chapman, Kevin M. Ward, Mihai N. Ducea, Richard O. Lease, Christopher J. Poulsen, Lara S. Wagner, Joel E. Saylor, George Zandt, Brian K. Horton
2017, Annual Review of Earth and Planetary Sciences (45) 529-559
Current end-member models for the geodynamic evolution of orogenic plateaus predict (a) slow and steady rise during crustal shortening and ablative subduction (i.e., continuous removal) of the lower lithosphere or (b) rapid surface uplift following shortening, which is associated with punctuated removal of dense lower lithosphere and/or lower crustal flow....
Single-beam bathymetry data collected in 2015 from Grand Bay, Alabama-Mississippi
Nancy T. DeWitt, Chelsea A. Stalk, Christopher G. Smith, Stanley D. Locker, Jake J. Fredericks, Terrence A. McCloskey, Cathryn J. Wheaton
2017, Data Series 1070
As part of the Sea-level and Storm Impacts on Estuarine Environments and Shorelines (SSIEES) project, scientists from the U.S. Geological Survey (USGS) St. Petersburg Coastal and Marine Science Center conducted a single-beam bathymetry survey within the estuarine, open-bay, and tidal creek environments of Grand Bay, Alabama-Mississippi, from May to June...
Basalt–trachybasalt samples in Gale Crater, Mars
Peter H. Edwards, John C. Bridges, Roger C. Wiens, Ryan B. Anderson, M. Darby Dyar, Martin Fisk, Lucy Thompson, Patrick J. Gasda, Justin Filiberto, Susanne P. Schwenzer, Diana L. Blaney, Ian Hutchinson
2017, Meteoritics and Planetary Science (52) 2391-2410
The ChemCam instrument on the Mars Science Laboratory (MSL) rover, Curiosity, observed numerous igneous float rocks and conglomerate clasts, reported previously. A new statistical analysis of single‐laser‐shot spectra of igneous targets observed by ChemCam shows a strong peak at ~55 wt% SiO2 and 6 wt% total alkalis, with a minor secondary maximum at...
Predictability and selection of hydrologic metrics in riverine ecohydrology
Ken Eng, Theodore E. Grantham, Daren Carlisle, David M. Wolock
2017, Freshwater Science (36) 915-926
The natural flow regime is critical to the health of riverine ecosystems. Many hydrologic metrics (HMs) have been developed to describe natural flow regimes, quantify flow alteration, and provide the hydrologic foundation for the development of environmental flow standards. Many applications require the use of models to predict expected natural...
A paleomagnetic age estimate for the draining of ancient Lake Alamosa, San Luis Valley, south-central Colorado, U.S.A.
Joshua K. Davis, Mark R. Hudson, V. J. S. Grauch
2017, Rocky Mountain Geology (52) 107-117
In September 2009, a 99.4-m (326-ft) deep well was drilled proximal to Great Sand Dunes National Park and Preserve to explore the history and subsurface geology of the San Luis Valley, Colorado. Of particular interest was deciphering the evolution of ancient Lake Alamosa, which filled much of the San Luis...
Effect of stocking and biotic and abiotic factors on Muskellunge recruitment in northern Wisconsin lakes
Todd S. Caspers, Michael J. Hansen, Steven W. Hewett
2017, Conference Paper, Muskellunge Management: Fifty Years of Cooperation Among Anglers, Scientists, and Fisheries Biologists
The Muskellunge Esox masquinongy is an important recreational fish species in North America. Some populations of Muskellunge are in decline, despite a reduction in harvest by anglers due largely to a growing catch-and-release ethic. Our objectives were to determine if Muskellunge recruitment was influenced by stocking, biotic factors, and abiotic...
A diatom voucher flora from selected southeast rivers (USA)
Ian W. Bishop, Rhea R.M. Esposito, Meredith Tyree, Sarah A. Spaulding
2017, Phytotaxa (332) 101-140
This flora is intended to serve as an image voucher for samples analyzed for the U.S. Geological Survey Southeast Stream Quality Assessment (SESQA). The SESQA study included measurement of watershed and water quality parameters to determine the factors that have the greatest potential to alter biotic condition. Algal samples were...
Iron isotope systematics of shale-derived soils as potentially influenced by small mineral particle loss
Carleton R. Bern, Tiffany Yesavage, Michael Pribil
2017, Conference Paper
Loss of small mineral particles from soil has been suggested as a process that can produce net isotopic fractionation in the remaining soil. We extracted water dispersible colloids (WDCs) from bulk soil collected at the Susquehanna/Shale Hills Critical Zone Observatory (SSHO) and measured their Fe isotopic composition for comparison to...
