Type E botulism outbreaks: a manual for beach managers and the public
2012, Book
The Great Lakes basin has undergone a resurgence of Type E botulism (often referred to as avian botulism) in recent years, characterized by dead birds and fish along the shores of the Great Lakes. The number of deaths and areas affected appear to be increasing to levels that induce concern...
Correlation of resource plays and biodiversity patterns: accumulation of organic-rich shale tracks taxonomic turnover
Jennifer D. Eoff
2012, GCAGS Journal (1) 1-12
Similar paleogeographic and paleotectonic settings characterize most self-sourced shale hydrocarbon plays. Their deposition occurred within similar orders of magnitude of eustatic events and during geologic periods characterized by “warm” (or transitional) climates and calcitic seas. In addition, the stratigraphic occurrence of shale plays parallels certain historical patterns of marine metazoan...
Genetic basis of differences in myxospore count between whirling disease-resistant and -susceptible strains of rainbow trout
Eric R. Fetherman, Dana L. Winkelman, George J. Schisler, Michael F. Antolin
2012, Diseases of Aquatic Organisms (102) 97-106
We used a quantitative genetics approach and estimated broad sense heritability (h2b) of myxospore count and the number of genes involved in myxospore formation to gain a better understanding of how resistance to Myxobolus cerebralis, the parasite responsible for whirling disease, is inherited in rainbow trout Oncorhynchus mykiss. An M....
Geologic processes influence the effects of mining on aquatic ecosystems
Travis S. Schmidt, William H. Clements, Richard B. Wanty, Philip L. Verplanck, Stan E. Church, Carma A. San Juan, David L. Fey, Barnaby W. Rockwell, Ed H. DeWitt, Terry L. Klein
2012, Ecological Applications (22) 870-879
Geologic processes strongly influence water and sediment quality in aquatic ecosystems but rarely are geologic principles incorporated into routine biomonitoring studies. We test if elevated concentrations of metals in water and sediment are restricted to streams downstream of mines or areas that may discharge mine wastes. We surveyed 198 catchments...
Evidence of cryptic individual specialization in an opportunistic insectivorous bat
Paul M. Cryan, Craig A. Stricker, Michael B. Wunder
2012, Journal of Mammalogy (93) 381-389
Habitat use and feeding behaviors of cryptic animals are often poorly understood. Analyses of stable isotope ratios in animal body tissues can help reveal an individual's location and resource use during tissue growth. We investigated variation in stable isotope ratios of 4 elements (H, C, N, and S) in the...
The 2009 eruption of Redoubt Volcano, Alaska
Katharine F. Bull, Cheryl Cameron, Michelle L. Coombs, Angie Diefenbach, Taryn Lopez, Steve McNutt, Christina A. Neal, Allison Payne, John A. Power, David J. Schneider, William E. Scott, Seth Snedigar, Glenn Thompson, Kristi L. Wallace, Christopher F. Waythomas, Peter Webley, Cynthia A. Werner
Janet R. Schaefer, editor(s)
2012, Report of Investigations of the Alaska Department of Natural Resources, Division of Geological & Geophysical Surveys 2011-5
Redoubt Volcano, an ice-covered stratovolcano on the west side of Cook Inlet, erupted in March 2009 after several months of escalating unrest. The 2009 eruption of Redoubt Volcano shares many similarities with eruptions documented most recently at Redoubt in 1966–68 and 1989–90. In each case, the eruptive phase lasted several...
Estimating discharge measurement uncertainty using the interpolated variance estimator
T. Cohn, J. Kiang, R. Mason Jr.
2012, Journal of Hydraulic Engineering (139) 502-510
Methods for quantifying the uncertainty in discharge measurements typically identify various sources of uncertainty and then estimate the uncertainty from each of these sources by applying the results of empirical or laboratory studies. If actual measurement conditions are not consistent with those encountered in the empirical or laboratory studies, these...
Constraints on the timing of Co-Cu ± Au mineralization in the Blackbird district, Idaho, using SHRIMP U-Pb ages of monazite and xenotime plus zircon ages of related Mesoproterozoic orthogneisses and metasedimentary rocks
John N. Aleinikoff, John F. Slack, Karen Lund, Karl V. Evans, C. Mark Fanning, Frank K. Mazdab, Joseph L. Wooden, Renee M. Pillers
2012, Economic Geology (107) 1143-1175
The Blackbird district, east-central Idaho, contains the largest known Co reserves in the United States. The origin of strata-hosted Co-Cu ± Au mineralization at Blackbird has been a matter of controversy for decades. In order to differentiate among possible genetic models for the deposits, including various combinations of volcanic, sedimentary,...
Factors influencing geographic patterns in diversity of forest bird communities of eastern Connecticut, USA
Robert J. Craig, Robert W. Klaver
2012, Ecography (36) 599-609
At regional scales, the most important variables associated with diversity are latitudinally-based temperature and net primary productivity, although diversity is also influenced by habitat. We examined bird species richness, community density and community evenness in forests of eastern Connecticut to determine whether: 1) spatial and seasonal patterns exist in diversity,...
Airborne LiDAR analysis and geochronology of faulted glacial moraines in the Tahoe-Sierra frontal fault zone reveal substantial seismic hazards in the Lake Tahoe region, California-Nevada USA
James F. Howle, Gerald W. Bawden, Richard A. Schweickert, Robert C. Finkel, Lewis E. Hunter, Ronn S. Rose, Brent von Twistern
2012, GSA Bulletin (124) 1087-1101
We integrated high-resolution bare-earth airborne light detection and ranging (LiDAR) imagery with field observations and modern geochronology to characterize the Tahoe-Sierra frontal fault zone, which forms the neotectonic boundary between the Sierra Nevada and the Basin and Range Province west of Lake Tahoe. The LiDAR imagery clearly delineates active normal...
Elemental mapping by Dawn reveals exogenic H in Vesta's regolith
Thomas H. Prettyman, David W. Mittlefehldt, Naoyuki Yamashita, David J. Lawrence, Andrew W. Beck, William C. Feldman, Timothy J. McCoy, Harry Y. McSween, Michael J. Toplis, Timothy N. Titus, Pasquale Tricarico, Robert C. Reedy, John S. Hendricks, Olivier Forni, Lucille Le Corre, Jian-Yang Li, Hugau Mizzon, Vishnu Reddy, Carol A. Raymond, Christopher T. Russell
2012, Science (338) 242-246
Using Dawn’s Gamma Ray and Neutron Detector, we tested models of Vesta’s evolution based on studies of howardite, eucrite, and diogenite (HED) meteorites. Global Fe/O and Fe/Si ratios are consistent with HED compositions. Neutron measurements confirm that a thick, diogenitic lower crust is exposed in the Rheasilvia basin, which is...
Estimation of wildfire size and risk changes due to fuels treatments
M.A. Cochrane, C.J. Moran, M.C. Wimberly, A.D. Baer, M.A. Finney, K.L. Beckendorf, J. Eidenshink, Z. Zhu
2012, International Journal of Wildland Fire (21) 357-367
Human land use practices, altered climates, and shifting forest and fire management policies have increased the frequency of large wildfires several-fold. Mitigation of potential fire behaviour and fire severity have increasingly been attempted through pre-fire alteration of wildland fuels using mechanical treatments and prescribed fires. Despite annual treatment of more...
Evaluation of carbon fluxes and trends (2000-2008) in the Greater Platte River Basin: a sustainability study on the potential biofuel feedstock development
Yingxin Gu, Bruce K. Wylie, Li Zhang, Tagir G. Gilmanov
2012, Biomass and Bioenergy (47) 145-152
This study evaluates the carbon fluxes and trends and examines the environmental sustainability (e.g., carbon budget, source or sink) of the potential biofuel feedstock sites identified in the Greater Platte River Basin (GPRB). A 9-year (2000–2008) time series of net ecosystem production (NEP), a measure of net carbon absorption or...
Identifying grasslands suitable for cellulosic feedstock crops in the Greater Platte River Basin: dynamic modeling of ecosystem performance with 250 m eMODIS
Yingxin Gu, Stephen P. Boyte, Bruce K. Wylie, Larry L. Tieszen
2012, GCB Bioenergy (4) 96-106
This study dynamically monitors ecosystem performance (EP) to identify grasslands potentially suitable for cellulosic feedstock crops (e.g., switchgrass) within the Greater Platte River Basin (GPRB). We computed grassland site potential and EP anomalies using 9-year (2000–2008) time series of 250 m expedited moderate resolution imaging spectroradiometer Normalized Difference Vegetation Index...
Complementarity of ResourceSat-1 AWiFS and Landsat TM/ETM+ sensors
S.N. Goward, G. Chander, M. Pagnutti, A. Marx, R. Ryan, N. Thomas, R. Tetrault
2012, Remote Sensing of Environment (123) 41-56
Considerable interest has been given to forming an international collaboration to develop a virtual moderate spatial resolution land observation constellation through aggregation of data sets from comparable national observatories such as the US Landsat, the Indian ResourceSat and related systems. This study explores the complementarity of India's ResourceSat-1 Advanced Wide...
A graphical method to evaluate predominant geochemical processes occurring in groundwater systems for radiocarbon dating
Liang-Feng Han, Niel Plummer, Pradeep Aggarwal
2012, Chemical Geology (318-319) 88-112
A graphical method is described for identifying geochemical reactions needed in the interpretation of radiocarbon age in groundwater systems. Graphs are constructed by plotting the measured 14C, δ13C, and concentration of dissolved inorganic carbon and are interpreted according to specific criteria to recognize water samples that are consistent with a...
Changing restoration rules: exotic bivalves interact with residence time and depth to control phytoplankton productivity
Lisa V. Lucas, Janet K. Thompson
2012, Ecosphere (3)
Non-native species are a prevalent ecosystem stressor that can interact with other stressors to confound resource management and restoration. We examine how interactions between physical habitat attributes and a particular category of non-native species (invasive bivalves) influence primary production in aquatic ecosystems. Using mathematical models, we show how intuitive relationships...
Estrogenic compounds decrease growth hormone receptor abundance and alter osmoregulation in Atlantic salmon
Darren T. Lerner, Mark A. Sheridan, Stephen D. McCormick
2012, General and Comparative Endocrinology (179) 196-204
Exposure of Atlantic salmon smolts to estrogenic compounds is shown to compromise several aspects of smolt development. We sought to determine the underlying endocrine mechanisms of estrogen impacts on the growth hormone (GH)/insulin-like growth factor I (IGF-I) axis. Smolts in freshwater (FW) were either injected 3 times over 10 days...
Annual accumulation over the Greenland ice sheet interpolated from historical and newly compiled observation data
Dayong Shen, Yuling Liu, Shengli Huang
2012, Geografiska Annaler, Series A: Physical Geography (94) 377-393
The estimation of ice/snow accumulation is of great significance in quantifying the mass balance of ice sheets and variation in water resources. Improving the accuracy and reducing uncertainty has been a challenge for the estimation of annual accumulation over the Greenland ice sheet. In this study, we kriged and analyzed...
Arctic shorebirds in North America: A decade of monitoring
Jonathan R. Bart, Victoria H. Johnston, editor(s)
2012, Studies in Avian Biology 44
Each year shorebirds from North and South America migrate thousands of miles to spend the summer in the Arctic. There they feed in shoreline marshes and estuaries along some of the most productive and pristine coasts anywhere. With so much available food they are able to reproduce almost explosively; and...
Effects of supplemental feeding and aggregation on fecal glucocorticoid metabolite concentrations in elk
Victoria E. Forristal, Scott Creel, Mark L. Taper, Brandon M. Scurlock, Paul C. Cross
2012, Journal of Wildlife Management (76) 76-4
Habitat modifications and supplemental feeding artificially aggregate some wildlife populations, with potential impacts upon contact and parasite transmission rates. Less well recognized, however, is how increased aggregation may affect wildlife physiology. Crowding has been shown to induce stress responses, and increased glucocorticoid (GC) concentrations can reduce immune function and increase...
Dinocyst taphonomy, impact craters, cyst ghosts, and the Paleocene-Eocene thermal maximum (PETM)
Lucy E. Edwards
2012, Palynology (36) 80-95
Dinocysts recovered from sediments related to the Chesapeake Bay impact structure in Virginia and the earliest Eocene suboxic environment in Maryland show strange and intriguing details of preservation. Features such as curled processes, opaque debris, breakage, microborings and cyst ghosts, among others, invite speculation about catastrophic depositional processes, rapid burial...
Dwarf char, a new form of chars (the genus Salvelinus) in Lake Kronotskoe
S.D. Pavlov, E.A. Pivovarov, Carl O. Ostberg
2012, Doklady Biological Sciences (442) 20-23
Lake Kronotskoe is situated in the Kronotskii State Nature Reserve and is a unique natural heritage of Kamchatka. The lake–river system of the reserve includes numerous springs and small streams and three large inflowing rivers, Listvennichnaya, Unana, and Uzon, which form the main bays of...
Using cluster analysis to organize and explore regional GPS velocities
Robert W. Simpson, Wayne Thatcher, James C. Savage
2012, Geophysical Research Letters (39)
Cluster analysis offers a simple visual exploratory tool for the initial investigation of regional Global Positioning System (GPS) velocity observations, which are providing increasingly precise mappings of actively deforming continental lithosphere. The deformation fields from dense regional GPS networks can often be concisely described in terms of relatively coherent blocks...
A tale of two land uses in the American West: rural residential growth and energy development
Timothy J. Assal, Jessica M. Montag
2012, Journal of Maps (8) 327-333
This paper describes a spatiotemporal land use map for a rural county in the western United States. Sublette County, Wyoming has undergone recent land use change in the form of heightened rural residential development on private land and increased energy development on both public and private land. In this study...
