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...
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...
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...
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...
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...
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...
Geochemical monitoring for potential environmental impacts of geologic sequestration of CO2
Yousif K. Kharaka, David R. Cole, James J. Thordsen, Kathleen D. Gans, Randal B. Thomas
2013, Reviews in Mineralogy and Geochemistry (77) 399-430
Carbon dioxide sequestration is now considered an important component of the portfolio of options for reducing greenhouse gas emissions to stabilize their atmospheric levels at values that would limit global temperature increases to the target of 2 °C by the end of the century (Pacala and Socolow 2004; IPCC 2005,...
Comparing mechanisms of host manipulation across host and parasite taxa
Kevin D. Lafferty, Jenny C. Shaw
2013, Journal of Experimental Biology (216) 56-66
Parasites affect host behavior in several ways. They can alter activity, microhabitats or both. For trophically transmitted parasites (the focus of our study), decreased activity might impair the ability of hosts to respond to final-host predators, and increased activity and altered microhabitat choice might increase contact rates between hosts and...
Overestimated water storage
Leonard F. Konikow
2013, Nature Geoscience (6)
No abstract available....
Serum chemistry, hematologic, and post-mortem findings in free-ranging bobcats (Lynx rufus) with notoedric mange
Laurel E.K. Serieys, Janet Foley, Sean Owens, Leslie Woods, Erin E. Boydston, Lisa M. Lyren, Robert H. Poppenga, Deana L. Clifford, Nicole Stephenson, Jaime Rudd, Seth P.D. Riley
2013, Journal of Parasitology (99) 989-996
Notoedric mange was responsible for a population decline of bobcats (Lynx rufus) in 2 Southern California counties from 2002–2006 and is now reported to affect bobcats in Northern and Southern California. With this study we document clinical laboratory and necropsy findings for bobcats with mange. Bobcats in this study included...
Potential effects of sea-level rise on coastal wetlands in southeastern Louisiana
Patty Glick, Jonathan Clough, Amy Polaczyk, Brady R. Couvillion, Brad Nunley
2013, Journal of Coastal Research 211-233
Coastal Louisiana wetlands contain about 37% of the estuarine herbaceous marshes in the conterminous United States. The long-term stability of coastal wetlands is often a function of a wetland's ability to maintain elevation equilibrium with mean sea level through processes such as primary production and sediment accretion. However, Louisiana has...
The water-quality effects of a bulkhead installed in the Dinero mine tunnel, near Leadville, Colorado
Katherine Walton-Day, Taylor J. Mills, Adolph Amundson, Kato T. Dee, Melissa R. Relego, Caitlin Borbely
A. Brown, L. Figueroa, C. Wolkersdorfer, editor(s)
2013, Conference Paper, Annual International Mine Water Association conference — Reliable mine water technology
No abstract available....
Pacific Island landbird monitoring annual report, Haleakalā National Park, 2012
Seth W. Judge, Richard J. Camp, Patrick J. Hart
2013, National Park Service Natural Resource Technical Report NPS/PACN/NRTR—2013/740
Haleakalā National Park (HALE) was surveyed for landbirds and habitat characteristics from March 20 through July 26, 2012. This information provides data in the time-series of landbird monitoring for long-term trends in forest bird distribution, density, and abundance. The Kīpahulu District of eastern Haleakalā Volcano was surveyed using point-transect distance...
Confronting dynamics and uncertainty in optimal decision making for conservation
Byron K. Williams, Fred A. Johnson
2013, Environmental Research Letters (8) 1-16
The effectiveness of conservation efforts ultimately depends on the recognition that decision making, and the systems that it is designed to affect, are inherently dynamic and characterized by multiple sources of uncertainty. To cope with these challenges, conservation planners are increasingly turning to the tools of decision analysis, especially dynamic...
Carbon stocks of trees killed by bark beetles and wildfire in the western United States
Jeffrey A. Hicke, Arjan J.H. Meddens, Craig D. Allen, Crystal A. Kolden
2013, Environmental Research Letters (8)
Forests are major components of the carbon cycle, and disturbances are important influences of forest carbon. Our objective was to contribute to the understanding of forest carbon cycling by quantifying the amount of carbon in trees killed by two disturbance types, fires and bark beetles, in the western United States...
Geologic framework and petroleum systems of Cook Inlet basin, south-central Alaska
D. L. LePain, Richard G. Stanley, K. P. Helmold, D.P. Shellenbaum
D.M. Stone, D.M. Hite, editor(s)
2013, Book chapter, Oil and cas fields of the Cook Inlet Basin, Alaska: AAPG memoir 104
This report provides a comprehensive overview of the stratigraphy, structure, tectonics, and petroleum systems of the Cook Inlet basin, an important oil- and gas-producing region in south-central Alaska....
SPARROW models used to understand nutrient sources in the Mississippi/Atchafalaya River Basin
Dale M. Robertson, David A. Saad
2013, Journal of Environmental Quality (42) 1422-1440
Nitrogen (N) and phosphorus (P) loading from the Mississippi/Atchafalaya River Basin (MARB) has been linked to hypoxia in the Gulf of Mexico. To describe where and from what sources those loads originate, SPAtially Referenced Regression On Watershed attributes (SPARROW) models were constructed for the MARB using geospatial datasets for 2002,...
