Robust, low-cost data loggers for stream temperature, flow intermittency, and relative conductivity monitoring
Thomas Chapin, Andrew S. Todd, Matthew P. Zeigler
2014, Water Resources Research (50) 6542-6548
Water temperature and streamflow intermittency are critical parameters influencing aquatic ecosystem health. Low-cost temperature loggers have made continuous water temperature monitoring relatively simple but determining streamflow timing and intermittency using temperature data alone requires significant and subjective data interpretation. Electrical resistance (ER) sensors have recently been developed to overcome the...
Mineral resource of the month: vermiculite
Arnold O. Tanner
2014, Earth (59) 63-63
Vermiculite comprises a group of hydrated, laminar magnesium-aluminum-iron silicate minerals resembling mica. They are secondary minerals, typically altered biotite, iron-rich phlogopite or other micas or clay-like minerals that are themselves sometimes alteration products of amphibole, chlorite, olivine and pyroxene. Vermiculite deposits are associated with volcanic ultramafic rocks rich in magnesium...
Bioaccumulation and toxicity of CuO nanoparticles by a freshwater invertebrate after waterborne and dietborne exposures
Marie Noele Croteau, Superb K. Misra, Samuel N. Luoma, Eugenia Valsami-Jones
2014, Environmental Science & Technology (48) 10929-10937
The incidental ingestion of engineered nanoparticles (NPs) can be an important route of uptake for aquatic organisms. Yet, knowledge of dietary bioavailability and toxicity of NPs is scarce. Here we used isotopically modified copper oxide (65CuO) NPs to characterize the processes governing their bioaccumulation in a freshwater snail after waterborne...
An empirical approach to modeling methylmercury concentrations in an Adirondack stream watershed
Douglas A. Burns, Elizabeth A. Nystrom, David M. Wolock, Paul M. Bradley, Karen Riva-Murray
2014, Journal of Geophysical Research: Biogeosciences (119) 1970-1984
Inverse empirical models can inform and improve more complex process-based models by quantifying the principal factors that control water quality variation. Here we developed a multiple regression model that explains 81% of the variation in filtered methylmercury (FMeHg) concentrations in Fishing Brook, a fourth-order stream in the Adirondack Mountains, New...
Interannual observations and quantification of summertime H2O ice deposition on the Martian CO2 ice south polar cap
Adrian J. Brown, Sylvain Piqueux, Timothy N. Titus
2014, Earth and Planetary Science Letters (405) 102-109
The spectral signature of water ice was observed on Martian south polar cap in 2004 by the Observatoire pour l'Mineralogie, l'Eau les Glaces et l'Activite (OMEGA) ( Bibring et al., 2004). Three years later, the OMEGA instrument was used to discover water ice deposited during southern summer on the polar...
Connectivity in the tropical coastal seascape: Implications for marine spatial planning and resource management
John C. Ogden, Ivan Nagelkerken, Carole C. McIvor
Stephen A. Bortone, editor(s)
2014, Book chapter, Interrelationships between corals and fisheries
No abstract available....
Detection of North American land cover change between 2005 and 2010 with 250m MODIS Data
Rene Colditz, Darren Pouliot, Ricardo Llamas, Collin Homer, Rasim Latifovic, Rainer Ressl, Carmen Meneses Tovar, Arturo Herneandez, Karen Richardson
2014, Photogrammetric Engineering & Remote Sensing (80) 918-924
No abstract available....
Melanin-based color of plumage: role of condition and of feathers' microstructure
Liliana D’Alba, Caroline R. Van Hemert, Karen A. Spencer, Britt J. Heidinger, Lisa Gill, Neil P. Evans, Pat Monaghan, Colleen M. Handel, Matthew D. Shawkey
2014, Integrative and Comparative Biology (54) 633-644
Whether melanin-based colors honestly signal a bird's condition during the growth of feathers is controversial, and it is unclear if or how the physiological processes underlying melanogenesis or color-imparting structural feather microstructure may be adversely affected by condition. Here we report results from two experiments designed to measure the effect...
Geologic and hydrogeologic frameworks of the Biscayne aquifer in central Miami-Dade County, Florida
Michael A. Wacker, Kevin J. Cunningham, John Williams
2014, Scientific Investigations Report 2014-5138
Evaluations of the lithostratigraphy, lithofacies, paleontology, ichnology, depositional environments, and cyclostratigraphy from 11 test coreholes were linked to geophysical interpretations, and to results of hydraulic slug tests of six test coreholes at the Snapper Creek Well Field (SCWF), to construct geologic and hydrogeologic frameworks for the study area in central...
An enhanced model of land water and energy for global hydrologic and earth-system studies
Paul C.D. Milly, Sergey L. Malyshev, Elena Shevliakova, Krista A. Dunne, Kirsten L. Findell, Tom Gleeson, Zhi Liang, Peter Phillips, Ronald J. Stouffer, Sean Swenson
2014, Journal of Hydrometeorology (15) 1739-1761
LM3 is a new model of terrestrial water, energy, and carbon, intended for use in global hydrologic analyses and as a component of earth-system and physical-climate models. It is designed to improve upon the performance and to extend the scope of the predecessor Land Dynamics (LaD) and LM3V models by...
Use of stable isotopes of nitrogen and water to identify sources of nitrogen in three urban creeks of Durham, North Carolina, 2011-12
Kristen Bukowski McSwain, Megan B. Young, Mary L. Giorgino
2014, Scientific Investigations Report 2014-5171
A preliminary assessment of nitrate sources was conducted in three creeks that feed nutrient impaired Falls and Jordan Lakes in the vicinity of Durham County, North Carolina, from July 2011 to June 2012. Cabin Branch, Ellerbe Creek, and Third Fork Creek were sampled monthly to determine if sources of nitrate...
Detecting thermally driven cyclic deformation of an exfoliation sheet with lidar and radar
Brian D. Collins, Greg M. Stock
2014, Conference Paper
Rock falls from steep, exfoliating cliffs are common in many landscapes. Of the many mechanisms known to trigger rock falls, thermally driven deformation is among the least quantified, despite potentially being a prevalent trigger due to its occurrence at all times of year. Here we present the results of a...
Sediment-hosted stratabound copper assessment of the Neoproterozoic Roan Group, central African copperbelt, Katanga Basin, Democratic Republic of the Congo and Zambia
Michael L. Zientek, James D. Bliss, David W. Broughton, Michael Christie, Paul Denning, Timothy S. Hayes, Murray W. Hitzman, John D. Horton, Susan Frost-Killian, Douglas J. Jack, Sharad Master, Heather L. Parks, Cliff D. Taylor, Anna B. Wilson, Niki E. Wintzer, Jon Woodhead
2014, Scientific Investigations Report 2010-5090-T
This study estimates the location, quality, and quantity of undiscovered copper in stratabound deposits within the Neoproterozoic Roan Group of the Katanga Basin in the Democratic Republic of the Congo and Zambia. The study area encompasses the Central African Copperbelt, the greatest sediment-hosted copper-cobalt province in the world, containing 152...
Global research priorities to mitigate plastic pollution impacts on marine wildlife
Amanda C. Vegter, Mario Barletta, Cathy A. Beck, Jose C. Borrero, Harry Burton, Marnie L. Campbell, Monica F. Costa, Marcus Eriksen, Cecilia Eriksson, Andres Estrades, Kirsten V. Gilardi, Britta D. Hardesty, Juliana A. Ivar do Sul, Jennifer L. Lavers, Bojan Lazar, Laurent Lebreton, Wallace J. Nichols, Christine A. Ribic, Peter G. Ryan, Qamar A. Schuyler, Stephen D. A. Smith, Hideshige Takada, Kathy A. Townsend, Colette C. C. Wabnitz, Chris Wilcox, Lindsay C. Young, Mark Hamann
2014, Endangered Species Research (25) 225-247
Marine wildlife faces a growing number of threats across the globe, and the survival of many species and populations will be dependent on conservation action. One threat in particular that has emerged over the last 4 decades is the pollution of oceanic and coastal habitats with plastic debris. The...
Preliminary monitoring protocol for the tidal freshwater wetland restoration herbivory study in national capital parks--east: Appendix B
Cairn Krafft, Jeffrey S. Hatfield
2014, Report, Anacostia Park wetlands and resident Canada goose management plan/ environmental impact statement
Four tidal freshwater wetland restoration projects have been undertaken within Anacostia Park on lands managed by the National Park Service since 1993. Monitoring the impacts of Canada goose (Branta canadensis) herbivory on the wetland vegetation will play a key role in determining the long-term health of these tidal freshwater wetland...
Accounting for false-positive acoustic detections of bats using occupancy models
Matthew J. Clement, Thomas J. Rodhouse, Patricia C. Ormsbee, Joseph M. Szewczak, James D. Nichols
2014, Journal of Applied Ecology (51) 1460-1467
1. Acoustic surveys have become a common survey method for bats and other vocal taxa. Previous work shows that bat echolocation may be misidentified, but common analytic methods, such as occupancy models, assume that misidentifications do not occur. Unless rare, such misidentifications could lead to incorrect inferences with significant management...
Lesser Scaup
Michael J. Anteau, Jean-Michel DeVink, David N. Koons, Jane E. Austin, Christine M. Custer, Alan D. Afton
2014, Book chapter, The birds of North America online
No abstract available....
Spring migration of waterfowl in the Northern Hemisphere: a management and conservation perspective
Joshua D. Stafford, Adam K. Janke, Michael J. Anteau, Aaron T. Pearse, Anthony D. Fox, Johan Elmberg, Jacob N. Straub, Michael W. Eichholz, Celine Arzel
2014, Wildfowl (2014) 70-85
Spring migration is a key part of the annual cycle for waterfowl populations in the northern hemisphere, due to its temporal proximity to the breeding season and because resources may be limited at one or more staging sites. Research based on field observations during spring lags behind other periods of the year, despite...
Subsurface geometry of the San Andreas-Calaveras fault junction: Influence of serpentinite and the Coast Range Ophiolite
Janet Tilden Watt, David A. Ponce, Russell W. Graymer, Robert C. Jachens, Robert W. Simpson
2014, Tectonics (33) 2025-2044
While an enormous amount of research has been focused on trying to understand the geologic history and neotectonics of the San Andreas-Calaveras fault (SAF-CF) junction, fundamental questions concerning fault geometry and mechanisms for slip transfer through the junction remain. We use potential-field, geologic, geodetic, and seismicity data to investigate the...
Climatic and density influences on recruitment in an irruptive population of Roosevelt elk
Heath D. Starns, Mark A. Ricca, Adam Duarte, Floyd W. Weckerly
2014, Journal of Mammalogy (95) 925-932
Current paradigms of ungulate population ecology recognize that density-dependent and independent mechanisms are not always mutually exclusive. Long-term data sets are necessary to assess the relative strength of each mechanism, especially when populations display irruptive dynamics. Using an 18-year time series of population abundances of Roosevelt elk (Cervus elaphus roosevelti) inhabiting...
Biscayne aquifer drinking water (USGS45): a new isotopic reference material for δ2H and δ18O measurements of water
Jennifer M. Lorenz, Lauren V. Tarbox, Bryan Buck, Haiping Qi, Tyler B. Coplen
2014, Rapid Communications in Mass Spectrometry (28) 2031-2034
RATIONALE As a result of the scarcity of isotopic reference waters for daily use, a new secondary isotopic reference material for international distribution has been prepared from drinking water collected from the Biscayne aquifer in Ft. Lauderdale, Florida. METHODS This isotopic reference water was filtered, homogenized, loaded into glass ampoules, sealed with a...
Distribution, stock composition and timing, and tagging response of wild Chinook Salmon returning to a large, free-flowing river basin
John H. Eiler, Michele Masuda, Ted R. Spencer, Richard J. Driscoll, Carl B. Schreck
2014, Transactions of the American Fisheries Society (143) 1476-1507
Chinook Salmon Oncorhynchus tshawytscha returns to the Yukon River basin have declined dramatically since the late 1990s, and detailed information on the spawning distribution, stock structure, and stock timing is needed to better manage the run and facilitate conservation efforts. A total of 2,860 fish were radio-tagged in the lower basin during...
Wolf recovery: a response to Bergstrom
L. David Mech
2014, The Wildlife Professional (8) 8-8
No abstract available....
Development of intestinal ion-transporting mechanisms during smoltification and seawater acclimation in Atlantic salmon Salmo salar
Henrik Sundh, Tom O. Nilsen, Jenny Lindstrom, Linda Hasselberg-Frank, Sigurd O. Stefansson, Stephen D. McCormick, K. Sundell
2014, Journal of Fish Biology (85) 1227-1252
This study investigated the expression of ion transporters involved in intestinal fluid absorption and presents evidence for developmental changes in abundance and tissue distribution of these transporters during smoltification and seawater (SW) acclimation of Atlantic salmonSalmo salar. Emphasis was placed on Na+, K+-ATPase (NKA) and Na+, K+, Cl− co-transporter (NKCC) isoforms,...
Mississippi River nitrate loads from high frequency sensor measurements and regression-based load estimation
Brian A. Pellerin, Brian A. Bergamaschi, Robert J. Gilliom, Charles G. Crawford, John Franco Saraceno, C. Paul Frederick, Bryan D. Downing, Jennifer C. Murphy
2014, Environmental Science & Technology (48) 12612-12619
Accurately quantifying nitrate (NO3–) loading from the Mississippi River is important for predicting summer hypoxia in the Gulf of Mexico and targeting nutrient reduction within the basin. Loads have historically been modeled with regression-based techniques, but recent advances with high frequency NO3– sensors allowed us to evaluate model performance relative to...
