Fire regimes of quaking aspen in the Mountain West
Douglas J. Shinneman, William L. Baker, Paul C. Rogers, Dominik Kulakowski
2013, Forest Ecology and Management (299) 22-34
Quaking aspen (Populus tremuloides Michx.) is the most widespread tree species in North America, and it is found throughout much of the Mountain West (MW) across a broad range of bioclimatic regions. Aspen typically regenerates asexually and prolifically after fire, and due to its seral status in many western conifer...
Spatially explicit models for inference about density in unmarked or partially marked populations
Richard B. Chandler, J. Andrew Royle
2013, Annals of Applied Statistics (7) 936-954
Recently developed spatial capture–recapture (SCR) models represent a major advance over traditional capture–recapture (CR) models because they yield explicit estimates of animal density instead of population size within an unknown area. Furthermore, unlike nonspatial CR methods, SCR models account for heterogeneity in capture probability arising from the juxtaposition of animal...
Integrating resource selection information with spatial capture--recapture
J. Andrew Royle, Richard B. Chandler, Catherine C. Sun, Angela K. Fuller
2013, Methods in Ecology and Evolution (4) 520-530
1. Understanding space usage and resource selection is a primary focus of many studies of animal populations. Usually, such studies are based on location data obtained from telemetry, and resource selection functions (RSFs) are used for inference. Another important focus of wildlife research is estimation and modeling population size and...
Nitrogen
L.E. Apodaca
2013, Mining Engineering (2013) 70-71
Ammonia was produced by 13 companies at 25 plants in 16 states during 2012. Sixty-one percent of total U.S. ammonia production capacity was centered in Louisiana, Oklahoma and Texas because of those states’ large reserves of natural gas, the dominant domestic feedstock....
Lithium in 2012
B.W. Jaskula
2013, Mining Engineering (65) 63-64
In 2012, estimated world lithium consumption was about 28 kt (31,000 st) of lithium contained in minerals and compounds, an 8 percent increase from that of 2011. Estimated U.S. consumption was about 2 kt (2,200 st) of contained lithium, the same as that of 2011. The United States was thought...
Industrial diamond
D.W. Olson
2013, Mining Engineering (2013) 53-54
Estimated 2012 world production of natural and synthetic industrial diamond was about 4.45 billion carats. During 2012, natural industrial diamonds were produced in at least 20 countries, and synthetic industrial diamond was produced in at least 12 countries. About 99 percent of the combined natural and synthetic global output was...
Stratigraphy and chronology of Provo shoreline deposits and lake-level implications, Late Pleistocene Lake Bonneville, eastern Great Basin, USA
David M. Miller, Charles G. Oviatt, John P. McGeehin
2013, Boreas (42) 342-361
The Provo shoreline of Lake Bonneville formed following the Bonneville flood, and, based on previous dating, was formed during a period of overflow from about 17.5 to 15.0 cal. ka. In many places the Provo shoreline consists of a pair of distinct shorelines, one ∼3 m higher than the other. We...
Overview of Chaitén Volcano, Chile, and its 2008-2009 eruption
Jon J. Major, Luis E. Lara
2013, Andean Geology (40) 196-215
Chaitén Volcano erupted unexpectedly in May 2008 in one of the largest eruptions globally since the 1990s. It was the largest rhyolite eruption since the great eruption of Katmai Volcano in 1912, and the first rhyolite eruption to have at least some of its aspects monitored. The eruption consisted of...
Water and sediment temperatures at mussel beds in the upper Mississippi River basin
Teresa J. Newton, Jennifer Sauer, Byron Karns
2013, Freshwater Mollusk Biology and Conservation (16) 53-62
Native freshwater mussels are in global decline and urgently need protection and conservation. Declines in the abundance and diversity of North American mussels have been attributed to human activities that cause pollution, waterquality degradation, and habitat destruction. Recent studies suggest that effects of climate change may also endanger native mussel...
New species of Rhyacodrilus (Annelida: Clitellata: Rhyacodrilinae) of North America, with re-description of R. sodalis (Eisen, 1879)
Pilar Rodriguez, Steven V. Fend
2013, Zootaxa (3664) 1-44
Six new Nearctic species of the aquatic oligochaete genus Rhyacodrilus (Annelida, Clitellata, Rhyacodrilinae), are de-scribed, five (R. saelonae sp. n., R. quileuticus sp. n., R. clio sp. n., R. alcyoneus sp. n. and R. longichaeta sp. n.) from western and one (R. propiporus sp. n.) from eastern North America. The...
Dynamics of fecal indicator bacteria, bacterial pathogen genes, and organic wastewater contaminants in the Little Calumet River: Portage Burns Waterway, Indiana
Sheridan K. Haack, Joseph W. Duris
2013, Journal of Great Lakes Research (39) 317-326
Little information exists on the co-occurrence of fecal indicator bacteria (FIB), bacterial pathogens, and organic wastewater-associated chemicals (OWCs) within Great Lakes tributaries. Fifteen watershed sites and one beach site adjacent to the Little Calumet River–Portage Burns Waterway (LCRPBW) on Lake Michigan were tested on four dates for pH, dissolved oxygen,...
Carnivore use of avocado orchards across an agricultural-wildland gradient
Theresa M. Nogeire, Frank W. Davis, Jennifer M. Duggan, Kevin R. Crooks, Erin E. Boydston
2013, PLoS ONE (8)
Wide-ranging species cannot persist in reserves alone. Consequently, there is growing interest in the conservation value of agricultural lands that separate or buffer natural areas. The value of agricultural lands for wildlife habitat and connectivity varies as a function of the crop type and landscape context, and quantifying these differences...
Rivermouth alteration of agricultural impacts on consumer tissue δ15N
James H. Larson, William B. Richardson, Jonathan M. Vallazza, J. C. Nelson
2013, PLoS ONE (8)
Terrestrial agricultural activities strongly influence riverine nitrogen (N) dynamics, which is reflected in the δ15N of riverine consumer tissues. However, processes within aquatic ecosystems also influence consumer tissue δ15N. As aquatic processes become more important terrestrial inputs may become a weaker predictor of consumer tissue δ15N. In a previous study,...
Movements and habitat-use of loggerhead sea turtles in the northern Gulf of Mexico during the reproductive period
Kristen M. Hart, Margaret M. Lamont, Autumn R. Sartain-Iverson, Ikuko Fujisaki, Brail S. Stephens
2013, PLoS ONE (8)
Nesting strategies and use of important in-water habitats for far-ranging marine turtles can be determined using satellite telemetry. Because of a lack of information on habitat-use by marine turtles in the northern Gulf of Mexico, we used satellite transmitters in 2010 through 2012 to track movements of 39 adult female...
Modeling transport of nutrients & sediment loads into Lake Tahoe under climate change
John Riverson, Robert Coats, Mariza Costa-Cabral, Mike Dettinger, John Reuter, Goloka Sahoo, Geoffrey Schladow
2013, Climatic Change (116) 35-50
The outputs from two General Circulation Models (GCMs) with two emissions scenarios were downscaled and bias-corrected to develop regional climate change projections for the Tahoe Basin. For one model—the Geophysical Fluid Dynamics Laboratory or GFDL model—the daily model results were used to drive a distributed hydrologic model. The watershed model...
Modeled distribution and abundance of a pelagic seabird reveal trends in relation to fisheries
Martin Renner, Julia K. Parrish, John F. Piatt, Kathy J. Kuletz, Ann E. Edwards, George L. Hunt Jr.
2013, Marine Ecology Progress Series (484) 259-277
The northern fulmar Fulmarus glacialis is one of the most visible and widespread seabirds in the eastern Bering Sea and Aleutian Islands. However, relatively little is known about its abundance, trends, or the factors that shape its distribution. We used a long-term pelagic dataset to model changes in fulmar at-sea...
A volcanic activity alert-level system for aviation: Review of its development and application in Alaska
Marianne C. Guffanti, Thomas Miller
2013, Natural Hazards (69) 1519-1533
An alert-level system for communicating volcano hazard information to the aviation industry was devised by the Alaska Volcano Observatory (AVO) during the 1989–1990 eruption of Redoubt Volcano. The system uses a simple, color-coded ranking that focuses on volcanic ash emissions: Green—normal background; Yellow—signs of unrest; Orange—precursory unrest or minor ash...
Measuring the relative resilience of subarctic lakes to global change: redundancies of functions within and across temporal scales
David G. Angeler, Craig R. Allen, Richard K. Johnson
2013, Journal of Applied Ecology (50) 572-584
1. Ecosystems at high altitudes and latitudes are expected to be particularly vulnerable to the effects of global change. We assessed the responses of littoral invertebrate communities to changing abiotic conditions in subarctic Swedish lakes with long-term data (1988–2010) and compared the responses of subarctic lakes with those of more...
Genomic analysis of avian influenza viruses from waterfowl in Western Alaska, USA
Andrew B. Reeves, John M. Pearce, Andrew M. Ramey, Craig R. Ely, Joel A. Schmutz, Paul L. Flint, Dirk V. Derksen, S. Ip, Kimberly A. Trust
2013, Journal of Wildlife Diseases (49) 600-610
The Yukon-Kuskokwim Delta (Y-K Delta) in western Alaska is an immense and important breeding ground for waterfowl. Migratory birds from the Pacific Americas, Central Pacific, and East Asian-Australasian flyways converge in this region, providing opportunities for intermixing of North American- and Eurasian-origin hosts and infectious agents, such as avian influenza...
Breeding biology of an afrotropical forest understory bird community in northeastern Tanzania
Victor J. Mkongewa, William D. Newmark, Thomas R. Stanley
2013, Wilson Journal of Ornithology (125) 260-267
Many aspects of the breeding biology of Afrotropical forest birds are poorly known. Here we provide a description based on the monitoring of 1461 active nests over eight breeding seasons about one or more aspects of the breeding biology for 28 coexisting understory bird species on the Amani Plateau in...
Dynamic deformation of Seguam Island, Alaska, 1992--2008, from multi-interferogram InSAR processing
Chang-Wook Lee, Zhong Lu, Joong-Sun Won, Hyung-Sup Jung, Daniel Dzurisin
2013, Journal of Volcanology and Geothermal Research (260) 43-51
We generated a time-series of ERS-1/2 and ENVISAT interferometric synthetic aperture radar (InSAR) images to study ground surface deformation at Seguam Island from 1992 to 2008. We used the small baseline subset (SBAS) technique to reduce artifacts associated with baseline uncertainties and atmospheric delay anomalies, and processed images from two...
Climate change winners: receding ice fields facilitate colony expansion and altered dynamics in an Adélie penguin metapopulation
Michelle A. LaRue, David G. Ainley, Matt Swanson, Katie M. Dugger, Phil O’B. Lyber, Kerry Barton, Grant Ballard
2013, PLoS ONE (8)
There will be winners and losers as climate change alters the habitats of polar organisms. For an Adélie penguin (Pygoscelis adeliae) colony on Beaufort Island (Beaufort), part of a cluster of colonies in the southern Ross Sea, we report a recent population increase in response to increased nesting habitat as...
2010 Joint United States-Canadian Program to explore the limits of the Extended Continental Shelf aboard U.S. Coast Guard Cutter Healy--Cruise HLY1002
Brian D. Edwards, Jonathan R. Childs, Peter J. Triezenberg, William W. Danforth, Helen Gibbons
2013, Open-File Report 2013-1067
In August and September 2010, the U.S. Geological Survey, in cooperation with Natural Resources Canada, Geological Survey of Canada, conducted bathymetric and geophysical surveys in the Beaufort Sea and eastern Arctic Ocean aboard the U.S. Coast Guard Cutter Healy. The principal objective of this mission to the high Arctic was...
Interacting coastal based ecosystem services: recreation and water quality in Puget Sound, WA
Jason Kreitler, Michael Papenfus, Kristin Byrd, William Labiosa
2013, PLoS ONE (8)
Coastal recreation and water quality are major contributors to human well-being in coastal regions. They can also interact, creating opportunities for ecosystem based management, ecological restoration, and water quality improvement that can positively affect people and the environment. Yet the effect of environmental quality on human behavior is often poorly...
Colonization of steelhead in a natal stream after barrier removal
Dana E. Weigel, Patrick J. Connolly, Kyle D. Martens, Madison S. Powell
2013, Transactions of the American Fisheries Society (142) 920-930
Colonization of vacant habitats is an important process for supporting the long-term persistence of populations and species. We used a before–after experimental design to follow the process of colonization by steelhead Oncorhynchus mykiss (anadromous Rainbow Trout) at six monitoring sites in a natal stream, Beaver Creek, after the modification or...
