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...
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...
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...
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,...
The influence of precipitation, vegetation and soil properties on the ecohydrology of sagebrush steppe rangelands on the INL site
Matthew J. Germino
2013, Report
The INL Site and other landscapes having sagebrush steppe vegetation are experiencing a simultaneous change in climate and floristics that result from increases in exotic species. Determining the separate and combined/interactive effects of climate and vegetation change is important for assessing future changes on the landscape and for hydrologic processes. This...
A natural resource condition assessment for Sequoia and Kings Canyon National Parks: Appendix 22: climatic change
Adrian J. Das, Nathan L. Stephenson
2013, Natural Resource Report NPS/SEKI/NRR--2013/665.22
Climate is a master controller of the structure, composition, and function of biotic communities, affecting them both directly, through physiological effects, and indirectly, by mediating biotic interactions and by influencing disturbance regimes. Sequoia and Kings Canyon National Park’s (SEKI’s) dramatic elevational changes in biotic communities -- from warm mediterranean to...
Monitoring vegetation response to episodic disturbance events by using multitemporal vegetation indices
Gregory D. Steyer, Brady R. Couvillion, John A. Barras
2013, Journal of Coastal Research 118-130
Normalized Difference Vegetation Index (NDVI) derived from MODerate-resolution Imaging Spectroradiometer (MODIS) satellite imagery and land/water assessments from Landsat Thematic Mapper (TM) imagery were used to quantify the extent and severity of damage and subsequent recovery after Hurricanes Katrina and Rita of 2005 within the vegetation communities of Louisiana's coastal wetlands....
Reply to discussion: "Nutrient inputs to the Laurentian Great Lakes by source and watershed estimated using SPARROW watershed models" by R. Peter Richards, Ibrahim Alameddine, J. David Allan, David B. Baker, Nathan S. Bosch, Remegio Confesor, Joseph V. DePinto, David M. Dolan, Jeffrey M. Reutter, and Donald Scavia
Dale M. Robertson, David A. Saad
2013, Journal of the American Water Resources Association (49) 725-734
No abstract available....
Strong species-environment feedback shapes plant community assembly along environmental gradients
Jiang Jiang, Donald L. DeAngelis
2013, Ecology and Evolution (3) 4119-4128
An aim of community ecology is to understand the patterns of competing species assembly along environmental gradients. All species interact with their environments. However, theories of community assembly have seldom taken into account the effects of species that are able to engineer the environment. In this modeling study, we integrate...
Economic vulnerability to sea-level rise along the northern U.S. Gulf Coast
Cindy A. Thatcher, John Brock, Elizabeth A. Pendleton
2013, Journal of Coastal Research (Spring 2013) 234-243
The northern Gulf of Mexico coast of the United States has been identified as highly vulnerable to sea-level rise, based on a combination of physical and societal factors. Vulnerability of human populations and infrastructure to projected increases in sea level is a critical area of uncertainty for communities in the...
Empirical estimates to reduce modeling uncertainties of soil organic carbon in permafrost regions: a review of recent progress and remaining challenges
U. Mishra, J.D. Jastrow, R. Matamala, G. Hugelius, C.D. Koven, Jennifer W. Harden, S.L. Ping, G.J. Michaelson, Z. Fan, R.M. Miller, A. D. McGuire, C. Tarnocai, P. Kuhry, W.J. Riley, K. Schaefer, E.A.G. Schuur, M.T. Jorgenson, L. D. Hinzman
2013, Environmental Research Letters (8)
The vast amount of organic carbon (OC) stored in soils of the northern circumpolar permafrost region is a potentially vulnerable component of the global carbon cycle. However, estimates of the quantity, decomposability, and combustibility of OC contained in permafrost-region soils remain highly uncertain, thereby limiting our ability to predict the...
A natural resource condition assessment for Sequoia and Kings Canyon National Parks: Appendix 11a: giant sequoias
Robert A. York, Nathan L. Stephenson, Marc Meyer, Steve Hanna, Moody Tadashi, Anthony C. Caprio, John J. Battles
2013, Natural Resource Report NPS/SEKI/NR--2013/665.11a
For natural resource managers in the southern Sierra Nevada, giant sequoia requires very little introduction. It receives great attention as an icon of western forests and as a common namesake with the areas where it occurs. While it is a single component of a very complex system, its attention in...
