Invasive species in southern Nevada
Matthew L. Brooks, Steven M. Ostoja, Jeanne Chambers
2013, General Technical Report RMRS-GTR-303-4
Southern Nevada contains a wide range of topographies, elevations, and climactic zones emblematic of its position at the ecotone between the Mojave Desert, Great Basin, and Colorado Plateau ecoregions. These varied environmental conditions support a high degree of biological diversity (Chapter 1), but they also provide opportunities for a wide...
TanA: a fluorogenic probe for thiaminase activity
Wanjun Zhu, James L. Zajicek, Donald E. Tillitt, Timothy E. Glass
2013, Analytical Methods (5) 446-448
A fluorogenic thiamine analogue is presented as a fluorescent probe for thiaminase activity. The emission of the fluorophore is quenched by photoinduced electron transfer (PET) to the N-substituted pyridinium portion of the probe. Action of the enzyme releases the free pyridine group causing a substantial increase in fluorescence....
Table of standard atomic weights 2013
Tyler B. Coplen, Willi A. Brand, Juris Meija, Manfred Gröning, Norman E. Holden, Michael Berglund, Paul De Bievre, Robert D. Loss, Thomas Prohaska, Thomas Walczyk
2013, Report
IUPAC Commission on Istopic Abundances and Atomic Weights' spreadsheet of Standard Atomic Weights....
Fire history, effects and management in southern Nevada
Matthew L. Brooks, Jeanne Chambers, Randy McKinley
2013, Report, The Southern Nevada Agency Partnership science and research synthesis: science to support land management in southern Nevada (General Technical Report RMRS-GTR-303)
Fire can be both an ecosystem stressor (Chapter 2) and a critical ecosystem process, depending on when, where, and under what conditions it occurs on the southern Nevada landscape. Fire can also pose hazards to human life and property, particularly in the wildland/urban interface (WUI). The challenge faced by land...
Reduced Myxobolus cerebralis actinospore production in a Colorado reservior may be linked to changes in Tubifex tubifex population structure
R. Barry Nehring, B. Hancock, M. Catanese, M.E.T. Stinson, Dana L. Winkelman, J. Wood, J. Epp
2013, Journal of Aquatic Animal Health (25) 205-220
Elucidating the dynamics of a parasitic infection requiring two hosts in a natural ecosystem can be a daunting task. Myxobolus cerebralis (Mc), the myxozoan parasite that causes whirling disease in some salmonids, was detected in the Colorado River upstream of Windy Gap Reservoir (WGR) in 1988. Subsequently, whirling disease was...
Influences of Availability on Parameter Estimates from Site Occupancy Models with Application to Submersed Aquatic Vegetation
Brian R. Gray, Mark D. Holland, Feng Yi, Leigh Ann Harrod Starcevich
2013, Natural Resource Modeling (26) 526-545
Site occupancy models are commonly used by ecologists to estimate the probabilities of species site occupancy and of species detection. This study addresses the influence on site occupancy and detection estimates of variation in species availability among surveys within sites. Such variation in availability may result from temporary emigration, nonavailability...
Essential biodiversity variables
H.M. Pereira, S. Ferrier, M. Walters, G.N. Geller, R.H.G. Jongman, Robert J. Scholes, M.W. Bruford, N. Brummitt, S.H.M. Butchart, A.C. Cardoso, N.C. Coops, E. Dulloo, D.P. Faith, J. Freyhof, R.D. Gregory, C. Heip, R. Höft, G. Hurtt, W. Jetz, D.S. Karp, M.A. McGeoch, David Obura, Y. Onada, N. Pettorelli, B. Reyers, R. Sayre, J.P.W. Scharlemann, S.N. Stuart, E. Turak, M. Walpole, M. Wegmann
2013, Science (339) 277-278
Reducing the rate of biodiversity loss and averting dangerous biodiversity change are international goals, reasserted by the Aichi Targets for 2020 by Parties to the United Nations (UN) Convention on Biological Diversity (CBD) after failure to meet the 2010 target (1, 2). However, there is no global, harmonized observation system...
234U/238U and δ87Sr in peat as tracers of paleosalinity in the Sacramento-San Joaquin Delta of California, USA
Judith Z. Drexler, James B. Paces, Charles N. Alpers, Lisamarie Windham-Myers, Leonid A. Neymark, Thomas D. Bullen, Howard E. Taylor
2013, Applied Geochemistry (40) 164-179
The purpose of this study was to determine the history of paleosalinity over the past 6000+ years in the Sacramento-San Joaquin Delta (the Delta), which is the innermost part of the San Francisco Estuary. We used a combination of Sr and U concentrations, d87Sr values, and 234U/238U activity ratios (AR)...
Descriptions and characterizations of water-level data and groundwater flow for the Brewster Boulevard and Castle Hayne Aquifer Systems and the Tarawa Terrace Aquifer
Robert E. Faye, L. Elliott Jones, René J. Suárez-Soto
2013, Report, Analyses and historical reconstruction of groundwater flow, contaminant fate and transport, and distribution of drinking water within the service areas of the Hadnot Point and Holcomb Boulevard Water Treatment Plants and Vicinities, U.S. Marine Corps Base Camp Lejeune, North Carolina
This supplement of Chapter A (Supplement 3) summarizes results of analyses of groundwater-level data and describes corresponding elements of groundwater flow such as vertical hydraulic gradients useful for groundwater-flow model calibration. Field data as well as theoretical concepts indicate that potentiometric surfaces within the study area are shown to resemble...
Using state-and-transition modeling to account for imperfect detection in invasive species management
Leonardo Frid, Tracy Holcombe, Jeffrey T. Morisette, Aaryn D. Olsson, Lindy Brigham, Travis M. Bean, Julio L. Betancourt, Katherine Bryan
2013, Invasive Plant Science and Management (6) 36-47
Buffelgrass, a highly competitive and flammable African bunchgrass, is spreading rapidly across both urban and natural areas in the Sonoran Desert of southern and central Arizona. Damages include increased fire risk, losses in biodiversity, and diminished revenues and quality of life. Feasibility of sustained and successful mitigation will depend heavily...
The interplay of evolved seawater and magmatic-hydrothermal fluids in the 3.24 Ga panorama volcanic-hosted massive sulfide hydrothermal system, North Pilbara Craton, Western Australia
Susan L. Drieberg, Steffen G. Hagemann, David L. Huston, Gary Landis, Chris G. Ryan, Esme Van Achterbergh, Torsten Vennemann
2013, Economic Geology (108) 79-110
The ~3240 Ma Panorama volcanic-hosted massive sulfide (VHMS) district is unusual for its high degree of exposure and low degree of postdepositional modification. In addition to typical seafloor VHMS deposits, this district contains greisen- and vein-hosted Mo-Cu-Zn-Sn mineral occurrences that are contemporaneous with VHMS orebodies and are hosted by the...
Tectonic evolution and Cretaceous gold metallogenesis of southwestern Alaska
Garth E. Graham, Richard J. Goldfarb, Marti L. Miller, Kati Gibler, Mike Roberts
2013, Society of Economic Geologists Special Publication (17) 169-200
Cretaceous gold metallogenesis in southwestern Alaska comprises three distinct episodes related to the accretionary evolution of northwestern North America. The oldest mineralizing event is characterized by 112 Ma Cu-Au-Bi-Te porphyry-type(?) veining in the zoned Bonanza and adjacent plutons that intruded rocks of the Nyac terrane. Tectonic reconstructions and limited geological...
Pacific island landbird monitoring annual report, National Park of American Samoa, Ta‘u and Tutuila units, 2011
Seth W. Judge, Richard J. Camp, Visa Vaivai, Patrick J. Hart
2013, National Park Service Natural Resource Technical Report NPS/PACN/NRTR—2013/666
The National Park of American Samoa (NPSA) was surveyed for landbirds and habitat characteristics from June through August, 2011. This information provides the first data in the time-series of landbird monitoring for long-term trends in forest bird distribution, density, and abundance within the NPSA. The NPSA survey area was comprised...
Ecosystem stressors in southern Nevada
Burton K. Pendleton, Jeanne C. Chambers, Matthew L. Brooks, Steven M. Ostoja
2013, General Technical Report RMRS-GTR-303-2
Southern Nevada ecosystems and their associated resources are subject to a number of global and regional/local stressors that are affecting the sustainability of the region. Global stressors include elevated carbon dioxide (CO2) concentrations and associated changes in temperature and precipitation patterns and amount, solar radiation, and nutrient cycles (Smith and...
The effect of complex fault rupture on the distribution of landslides triggered by the 12 January 2010, Haiti earthquake
Edwin L. Harp, Randall W. Jibson, Richard L. Dart
Claudio Margottini, Paolo Canuti, Kyoji Sassa, editor(s)
2013, Book chapter, Landslide Science and Practice: Volume 5: Complex Environment
The MW 7.0, 12 January 2010, Haiti earthquake triggered more than 7,000 landslides in the mountainous terrain south of Port-au-Prince over an area that extends approximately 50 km to the east and west from the epicenter and to the southern coast. Most of the triggered landslides were rock and soil...
Expression of terrain and surface geology in high-resolution helicopter-borne gravity gradient (AGG) data: examples from Great Sand Dunes National Park, Rio Grande Rift, Colorado
Benjamin J. Drenth
2013, The Leading Edge (32) 924-930
Airborne gravity gradient (AGG) data are rapidly becoming standard components of geophysical mapping programs, due to their advantages in cost, access, and resolution advantages over measurements of the gravity field on the ground. Unlike conventional techniques that measure the gravity field, AGG methods measure derivatives of the gravity field. This...
Increases in dissolved organic carbon accelerate loss of toxic Al in Adirondack lakes recovering from acidification
Gregory B. Lawrence, James E Dukett, Nathan Houck, Phillip Snyder, Susan B. Capone
2013, Environmental Science & Technology (47) 7095-7100
Increasing pH and decreasing Al in surface waters recovering from acidification have been accompanied by increasing concentrations of dissolved organic carbon (DOC) and associated organic acids that partially offset pH increases and complicate assessments of recovery from acidification. To better understand the processes of recovery, monthly chemistry from 42 lakes...
Assessing effects of stocked trout on nongame fish assemblages in southern Appalachian Mountain streams
D. Weaver, Thomas J. Kwak
2013, Transactions of the American Fisheries Society (142) 1495-1507
Fisheries managers are faced with the challenge of balancing the management of recreational fisheries with that of conserving native species and preserving ecological integrity. The negative effects that nonnative trout species exert on native trout are well documented and include alteration of competitive interactions, habitat use, and production. However, the...
Interactions between striped bass and other gamefish in reservoirs
Leandro E. Miranda, Scott W. Raborn
2013, American Fisheries Society Symposium (80) 501-519
Competitive interactions among reservoir fishes may be pronounced because fish assemblages in these artificial environments have had little time to develop niche-partitioning strategies that alleviate negative interspecific interactions. Such interactions may at times have been intensified by introductions of predators such as striped bass Morone saxatilis, introduced to create additional...
Loess and its geomorphic, stratigraphic and paleoclimatic significance in the Quaternary
Daniel R. Muhs
2013, Book chapter, Reference Module in Earth Systems and Environmental Sciences: Treatise on Geomorphology
Loess is aeolian silt visible in the field as a sedimentary body. It covers a significant portion of the land surface of the Earth. Loess thickness, particle size, and carbonate content decrease downwind from sources, useful trends for paleowinds. Many loess sections consist of relatively thick deposits of mostly unaltered...
Harmonizing multiple methods for reconstructing historical potential and reference evapotranspiration
Getachew Belaineh, David Sumner, Edward Carter, David Clapp
2013, Journal of Hydrologic Engineering (19)
Potential evapotranspiration (PET) and reference evapotranspiration (RET) data are usually critical components of hydrologic analysis. Many different equations are available to estimate PET and RET. Most of these equations, such as the Priestley-Taylor and Penman- Monteith methods, rely on detailed meteorological data collected at ground-based weather stations. Few weather stations...
Geologic, hydrologic, and urban hazards for design in desert environments
Robert H. Webb, Stanley A. Leake, Richard A. Malloy
Richard Malloy, John H. Brock, Anthony Floyd, Margaret Livingston, Robert H. Webb, editor(s)
2013, Book chapter, Design with the desert: Conservation and sustainable development
No abstract available....
Using habitat suitability models to target invasive plant species surveys
Alycia W. Crall, Catherine S. Jarnevich, Brendon Panke, Nick Young, Mark Renz, Jeffrey Morisette
2013, Ecological Applications (23) 60-72
Managers need new tools for detecting the movement and spread of nonnative, invasive species. Habitat suitability models are a popular tool for mapping the potential distribution of current invaders, but the ability of these models to prioritize monitoring efforts has not been tested in the field. We tested the utility...
Effects of acidic deposition and soil acidification on sugar maple trees in the Adirondack Mountains, New York
Timothy J. Sullivan, Gregory B. Lawrence, Scott W. Bailey, Todd C. McDonnell, Colin M. Beier, K.C. Weathers, G.T. McPherson, Daniel A. Bishop
2013, Environmental Science & Technology (47) 12687-12694
We documented the effects of acidic atmospheric deposition and soil acidification on the canopy health, basal area increment, and regeneration of sugar maple (SM) trees across the Adirondack region of New York State, in the northeastern United States, where SM are plentiful but not well studied and where widespread depletion...
Home range and use of habitat of western yellow-billed cuckoos on the middle Rio Grande, New Mexico
Juddson Sechrist, Darrell Ahlers, Katherine Potak Zehfuss, Robert Doster, Eben H. Paxton, Vicky M. Ryan
2013, Southwestern Naturalist (58) 411-419
The western yellow-billed cuckoo (Coccyzus americanus occidentalis) is a Distinct Population Segment that has been proposed for listing under the Endangered Species Act, yet very little is known about its spatial use on the breeding grounds. We implemented a study, using radio telemetry, of home range and use of habitat...
