Terrestrial cosmogenic surface exposure dating of glacial and associated landforms in the Ruby Mountains-East Humboldt Range of central Nevada and along the northeastern flank of the Sierra Nevada
Steven G. Wesnousky, Richard W. Briggs, Marc W. Caffee, Rick J. Ryerson, Robert C. Finkel, Lewis A. Owen
2016, Geomorphology (268) 72-81
Deposits near Lamoille in the Ruby Mountains-East Humboldt Range of central Nevada and at Woodfords on the eastern edge of the Sierra Nevada each record two distinct glacial advances. We compare independent assessments of terrestrial cosmogenic nuclide (TCN) surface exposure ages for glacial deposits that we have determined to those...
Modelling with stakeholders - Next generation
Alexey Voinov, Nagesh Kolagani, Michael K McCall, Pierre D. Glynn, Marit E Kragt, Frank O Ostermann, Suzanne A Pierce, Palaniappan Ramu
2016, Environmental Modelling and Software (77) 196-220
This paper updates and builds on ‘Modelling with Stakeholders’ Voinov and Bousquet, 2010 which demonstrated the importance of, and demand for, stakeholder participation in resource and environmental modelling. This position paper returns to the concepts of that publication and reviews the progress made since 2010. A new development is the...
Early Mesozoic geology in Virginia
Joseph P. Smoot
Christopher M. Bailey, W. Cullen Sherwood, L. Scott Eaton, David S. Powars, editor(s)
2016, Book chapter, The geology of Virginia (Virginia Museum of Natural History Special Publication 18)
No abstract available....
Simulating regional groundwater flow in the vicinity of the Nevada National Security Site, Nye County, Nevada
Wayne Belcher, Donald S. Sweetkind, Claudia C. Faunt
2016, Conference Paper, Waste Management 2016 (WM2016) Online Proceedings Paper 16104
No abstract available....
Diet overlap and predation between largemouth bass and walleye in Wisconsin lakes using DNA barcoding to improve taxonomic resolution
Craig J. Kelling, Daniel A. Isermann, Brian L. Sloss, Keith N. Turnquist
2016, North American Journal of Fisheries Management (36) 621-629
Over the last decade, the abundance of Largemouth Bass Micropterus salmoides has increased in many northern Wisconsin lakes, causing concern among anglers and biologists regarding the potential for Largemouth Bass to negatively affect populations of Walleye Sander vitreus through predation or competition for prey. Our objectives were to determine whether...
2015-2016 Palila abundance estimates
Richard J. Camp, Kevin W. Brinck, Paul C. Banko
2016, Technical Report HCSU-TR076
The palila (Loxioides bailleui) population was surveyed annually during 1998−2016 on Mauna Kea Volcano to determine abundance, population trend, and spatial distribution. In the latest surveys, the 2015 population was estimated at 852−1,406 birds (point estimate: 1,116) and the 2016 population was estimated at 1,494−2,385 (point estimate: 1,934). Similar numbers...
An evaluation of methods for estimating decadal stream loads
Casey J. Lee, Robert M. Hirsch, Gregory E. Schwarz, David J. Holtschlag, Stephen D. Preston, Charles G. Crawford, Aldo V. Vecchia
2016, Journal of Hydrology (542) 185-203
Effective management of water resources requires accurate information on the mass, or load of water-quality constituents transported from upstream watersheds to downstream receiving waters. Despite this need, no single method has been shown to consistently provide accurate load estimates among different water-quality constituents, sampling sites, and sampling regimes. We evaluate...
Hematology results from experimental exposure of sandhill cranes to West Nile virus
Glenn H. Olsen
2016, Conference Paper, Proceedings of the North American Crane Workshop
West Nile virus is a deadly virus for young cranes. In testing two different vaccines on both adult sandhill cranes (Grus canadensis), we discovered that some blood parameters are altered by exposure to the virus. White blood cell counts were the most obvious, and may be used as an indicator...
In-air hearing of a diving duck: A comparison of psychoacoustic and auditory brainstem response thresholds
Sara E. Crowell, Alicia M. Wells-Berlin, Ronald E. Therrien, Sally E. Yannuzzi, Catherine E. Carr
2016, Journal of the Acoustical Society of America (139) 3001-3008
Auditory sensitivity was measured in a species of diving duck that is not often kept in captivity, the lesser scaup. Behavioral (psychoacoustics) and electrophysiological [the auditory brainstem response (ABR)] methods were used to measure in-air auditory sensitivity, and the resulting audiograms were compared. Both approaches yielded audiograms with similar U-shapes...
Photoperiod and nesting phenology of whooping cranes at two captive sites
Glenn H. Olsen
2016, Conference Paper, Proceedings of the North American Crane Workshop
Increasing daylight is known to be a breeding stimulus in many avian species breeding in northern latitudes. This is thought to be true for cranes that breed in such latitudes including the Whooping Crane (Grus americana). For this reason, the captive breeding centers use artificial light to lengthen daylight hours,...
A comparison of helicopter-borne electromagnetic systems for hydrogeologic studies
Paul A. Bedrosian, Cyril Schamper, Esben Auken
2016, Geophysical Prospecting (64) 192-215
The increased application of airborne electromagnetic surveys to hydrogeological studies is driving a demand for data that can consistently be inverted for accurate subsurface resistivity structure from the near surface to depths of several hundred metres. We present an evaluation of three commercial airborne electromagnetic systems over two test blocks...
Hydrologic effects on diameter growth phenology for Celtis laevigata and Quercus lyrata in the floodplain of the lower White River, Arkansas
Scott T. Allen, Wesley Cochran, Ken W. Krauss, Richard F. Keim, Sammy L. King
Callie Jo Schweitzer, Wayne K. Clatterbuck, Christopher M. Oswalt, editor(s)
2016, Conference Paper, Proceedings of the 18th Biennial Southern Silvicultural Research Conference: USDA Forest Service General Technical Report SRS-212
Bottomland hardwood (BLH) forests represent an extensive wetland system in the Mississippi Alluvial Valley and southeastern USA, and it is currently undergoing widespread transition in species composition. One such transition involves increased establishment of sugarberry (Celtis laevigata), and decreased establishment of overcup oak (Quercus lyrata). The ecological mechanisms that control...
Predictive habitat models derived from nest-box occupancy for the endangered Carolina northern flying squirrel in the southern Appalachians
W. Mark Ford, A.M. Evans, Richard H. Odom, Jane L. Rodrigue, C.A. Kelly, Nicole Abaid, Corinne A. Diggins, Doug Newcomb
2016, Endangered Species Research (27) 131-140
In the southern Appalachians, artificial nest-boxes are used to survey for the endangered Carolina northern flying squirrel (CNFS; Glaucomys sabrinus coloratus), a disjunct subspecies associated with high elevation (>1385 m) forests. Using environmental parameters diagnostic of squirrel habitat, we created 35 a priori occupancy models in the program PRESENCE for boxes surveyed in...
Consequences of seasonal variation in reservoir water level for predatory fishes: linking visual foraging and prey densities
Stephen L. Klobucar, Phaedra E. Budy
2016, Canadian Journal of Fisheries and Aquatic Sciences (73) 53-64
In reservoirs, seasonal drawdown can alter the physical environment and may influence predatory fish performance. We investigated the performance of lake trout (Salvelinus namaycush) in a western reservoir by coupling field measurements with visual foraging and bioenergetic models at four distinct states (early summer, mid-summer, late summer, and fall). The...
Wildfire may increase habitat quality for spring Chinook salmon in the Wenatchee River subbasin, WA, USA
Rebecca L. Flitcroft, Jeffrey A. Falke, Gordon H. Reeves, Paul F. Hessburg, Kris M. McNyset, Lee E. Benda
2016, Forest Ecology and Management (359) 126-140
Pacific Northwest salmonids are adapted to natural disturbance regimes that create dynamic habitat patterns over space and through time. However, human land use, particularly long-term fire suppression, has altered the intensity and frequency of wildfire in forested upland and riparian areas. To examine the potential...
Cumberland-Marlboro basin basement drilling results – 2015: Cumberland, Hoke and Scotland counties, North Carolina
Jeffrey C. Reid, James L. Coleman, Kenneth B. Taylor, Katherine J. Marciniak, Walter T. Haven, Ryan A. Channell, Chandler I. Warner
2016, Report
No abstract available ...
Evaluation of the initial thematic output from a continuous change-detection algorithm for use in automated operational land-change mapping by the U.S. Geological Survey
Bruce Pengra, Alisa L. Gallant, Zhe Zhu, Devendra Dahal
2016, Remote Sensing (8) 1-33
The U.S. Geological Survey (USGS) has begun the development of operational, 30-m resolution annual thematic land cover data to meet the needs of a variety of land cover data users. The Continuous Change Detection and Classification (CCDC) algorithm is being evaluated as the likely methodology following early trials. Data for...
The potential carbon benefit of reforesting Hawai‘i Island non-native grasslands with endemic Acacia koa trees
Paul C. Selmants, Benjamin M. Sleeter, Nicholas Koch, James B. Friday
Rebekah Dickens Ohara, James B. Friday, editor(s)
2016, Conference Paper, Acacia koa in Hawaiʻi: Facing the future: 2016 Koa symposium proceedings
Large areas of forest in the tropics have been cleared and converted to pastureland. Hawai‘i Island is no exception, with over 100,000 ha of historically forested land now dominated by non-native grasses. Passive forest restoration has been unsuccessful because these grasslands tend to persist even after grazers have been removed,...
Measuring the impact of invasive species on popular culture: a case study based on toy turtles from Japan
Jeffrey E. Lovich, Katsuya Yamamoto
2016, Humans and Nature (27) 1-11
The red-eared slider turtle (Trachemys scripta elegans) is native to portions of the United States of America (USA) and adjacent northeastern Mexico. The bright and colorful hatchlings have long been popular as pets globally but numerous individuals have been released into the wild establishing populations in areas well outside their...
Biological soil crusts
Jayne Belnap
2016, Book chapter, Global Soil Biodiversity Atlas
No abstract available....
Exotic annual Bromus invasions: Comparisons among species and ecoregions in the western United States
Matthew L. Brooks, Cynthia S. Brown, Jeanne C. Chambers, Carla M. D'Antonio, Jon E. Keeley, Jayne Belnap
2016, Book chapter, Exotic brome-grasses in arid and semiarid ecosystems of the western US
Exotic annual Bromus species are widely recognized for their potential to invade, dominate, and alter the structure and function of ecosystems. In this chapter, we summarize the invasion potential, ecosystem threats, and management strategies for different Bromus species within each of five ecoregions of the western United States. We characterize...
Nutrient dynamics of the Delta: Effects on primary producers
Clifford N. Dahm, Alexander E. Parker, Anne E. Adelson, Mairgareth A. Christman, Brian A. Bergamaschi
2016, San Francisco Estuary and Watershed Science (14)
Increasing clarity of Delta waters, the emergence of harmful algal blooms, the proliferation of aquatic water weeds, and the altered food web of the Delta have brought nutrient dynamics to the forefront. This paper focuses on the sources of nutrients, the transformation and uptake of nutrients, and the links of...
A centroid model of species distribution with applications to the Carolina wren Thryothorus ludovicianus and house finch Haemorhous mexicanus in the United States
Qiongyu Huang, John R. Sauer, Anu Swatantran, Ralph Dubayah
2016, Ecography (39) 54-66
Drastic shifts in species distributions are a cause of concern for ecologists. Such shifts pose great threat to biodiversity especially under unprecedented anthropogenic and natural disturbances. Many studies have documented recent shifts in species distributions. However, most of these studies are limited to regional scales, and do not consider the...
Application of an extreme winter storm scenario to identify vulnerabilities, mitigation options, and science needs in the Sierra Nevada mountains, USA
Christine M. Albano, Michael D. Dettinger, Maureen McCarthy, Kevin D. Schaller, Toby Wellborn, Dale A. Cox
2016, Natural Hazards (80) 879-900
In the Sierra Nevada mountains (USA), and geographically similar areas across the globe where human development is expanding, extreme winter storm and flood risks are expected to increase with changing climate, heightening the need for communities to assess risks and better prepare for such events. In this case study, we...
Geologic context of large karst springs and caves in the Ozark National Scenic Riverways, Missouri
David J. Weary, Randall C. Orndorff
2016, Conference Paper
The ONSR is a karst park, containing many springs and caves. The “jewels” of the park are large springs, several of first magnitude, that contribute significantly to the flow and water quality of the Current River and its tributaries. Completion of 1:24,000-scale geologic mapping of the park and surrounding river...
