A spatial resolution threshold of land cover in estimating terrestrial carbon sequestration in four counties in Georgia and Alabama, USA
S.Q. Zhao, S. Liu, Z. Li, Terry L. Sohl
2010, Biogeosciences (7) 71-80
Changes in carbon density (i.e., carbon stock per unit area) and land cover greatly affect carbon sequestration. Previous studies have shown that land cover change detection strongly depends on spatial scale. However, the influence of the spatial resolution of land cover change information on the estimated terrestrial carbon sequestration is...
Predicting the retreat and migration of tidal forests along the northern Gulf of Mexico under sea-level rise
T.W. Doyle, K. W. Krauss, W.H. Conner, A.S. From
2010, Forest Ecology and Management (259) 770-777
Tidal freshwater forests in coastal regions of the southeastern United States are undergoing dieback and retreat from increasing tidal inundation and saltwater intrusion attributed to climate variability and sea-level rise. In many areas, tidal saltwater forests (mangroves) contrastingly are expanding landward in subtropical coastal reaches succeeding freshwater marsh and forest...
Controls of suspended sediment concentration, nutrient content, and transport in a subtropical wetland
G.B. Noe, J. W. Harvey, R.W. Schaffranek, L. G. Larsen
2010, Wetlands (30) 39-54
Redistribution of largely organic sediment from low elevation sloughs to higher elevation ridges is a leading hypothesis for the formation and maintenance of the native ridge and slough landscape pattern found in peat wetlands of the Florida Everglades. We tested this redistribution hypothesis by measuring the concentration and characteristics of...
Broadband ground-motion simulation using a hybrid approach
R.W. Graves, A. Pitarka
2010, Bulletin of the Seismological Society of America (100) 2095-2123
This paper describes refinements to the hybrid broadband ground-motion simulation methodology of Graves and Pitarka (2004), which combines a deterministic approach at low frequencies (f 1 Hz). In our approach, fault rupture is represented kinematically and incorporates spatial heterogeneity in...
Computational modeling of bedform evolution in rivers with implications for predictions of flood stage and bed evolution
Jonathan M. Nelson, Yasuyuki Shimizu, Sanjay Giri, Richard R. McDonald
2010, Conference Paper, Proceedings of the 4th Federal Interagency Hydrologic Modeling Conference and the 9th Federal Interagency Sedimentation Conference
Uncertainties in flood stage prediction and bed evolution in rivers are frequently associated with the evolution of bedforms over a hydrograph. For the case of flood prediction, the evolution of the bedforms may alter the effective bed roughness, so predictions of stage and velocity based on assuming bedforms retain the...
Occurrence of West Nile virus infection in raptors at the Salton Sea, California
Robert J. Dusek, William M. Iko, Erik K. Hofmeister
2010, Journal of Wildlife Diseases (46) 889-895
We investigated the prevalence of West Nile virus (WNV)-neutralizing antibodies and infectious virus, and the occurrence of overwinter transmission in two raptor species during January and March 2006 at the Salton Sea, Imperial County, California. We captured 208 American Kestrels (Falco sparverius) (January, n=100; March, n=108) and 116 Burrowing Owls (Athene cunicularia)...
Aquatic community responses to salmon carcass analog and wood bundle additions in restored floodplain habitats in an Alaskan stream
Aaron E. Martin, Mark S. Wipfli, Robert E. Spangler
2010, Transactions of the American Fisheries Society (139) 1828-1845
Land use activities often directly and indirectly limit the capacity of freshwater habitats to produce fish. Consequently, habitat creation and enhancement actions are often undertaken to increase the quantity and quality of resources available to aquatic communities within these impaired systems, with the intent to increase fish production. The objectives...
Rapid evolution in lekking grouse: Implications for taxonomic definitions
Sara J. Oyler-McCance, Judy St. John, Thomas W. Quinn
2010, Ornithological Monographs (67) 114-122
Species and subspecies delineations were traditionally defined by morphological and behavioral traits, as well as by plumage characteristics. Molecular genetic data have more recently been used to assess these classifications and, in many cases, to redefine them. The recent practice of utilizing molecular genetic data to examine taxonomic questions has...
Factors influencing the at-sea distribution of Cassin's Auklets (Ptychoramphus aleuticus) that breed in the Channel Islands, California
Josh Adams, John Y. Takekawa, Harry R. Carter, Julie L. Yee
2010, The Auk (127) 503-513
We used radiotelemetry to evaluate at-sea habitat use by Cassin's Auklets (Ptychoramphus aleuticus) that bred at Prince Island, off southern California, from 1999 through 2001. We used logistic regression to compare paired radiotelemetry (presence) with random (pseudo-absence) location-associated habitat variables derived from (1) satellite remote-sensing of sea surface temperature and...
Improved hydrogeophysical characterization and monitoring through parallel modeling and inversion of time-domain resistivity andinduced-polarization data
Timothy C. Johnson, Roelof J. Versteeg, Andy Ward, Frederick D. Day-Lewis, André Revil
2010, Geophysics (75) WA27-WA41
Electrical geophysical methods have found wide use in the growing discipline of hydrogeophysics for characterizing the electrical properties of the subsurface and for monitoring subsurface processes in terms of the spatiotemporal changes in subsurface conductivity, chargeability, and source currents they govern. Presently, multichannel and multielectrode data collections systems can collect...
Tectonic controls on nearshore sediment accumulation and submarine canyon morphology offshore La Jolla, Southern California
Nicolas Le Dantec, Leah J. Hogarth, Neal W. Driscoll, Jeffrey M. Babcock, Walter A. Barnhardt, William C. Schwab
2010, Marine Geology (268) 115-128
CHIRP seismic and swath bathymetry data acquired offshore La Jolla, California provide an unprecedented three-dimensional view of the La Jolla and Scripps submarine canyons. Shore-parallel patterns of tectonic deformation appear to control nearshore sediment thickness and distribution around the canyons. These shore-parallel patterns allow the impact of local tectonic deformation...
Forest exlosures: an experimental approach to understanding browsing by moose and deer
Stephen DeStefano, Edward K. Faison, J. Compton, David W. Wattles
2010, Massachusetts Wildlife (60) 14-17
No abstract available....
Unbiased survival estimates and evidence for skipped breeding opportunities in females
Erin L. Muths, Rick D. Scherer, Brad A. Lambert
2010, Methods in Ecology and Evolution (1) 123-130
1. Estimates of demographic parameters for females, in many organisms, are sparse. This is particularly worrisome as more and more species are faced with high extinction probabilities and conservation increasingly depends on actions dictated by complex predictive models that require accurate estimates of demographic parameters for each sex and species. 2. This study...
Bringing modeling to the masses: A web based system to predict potential species distributions
Jim Graham, Greg Newman, Sunil Kumar, Catherine S. Jarnevich, Nick Young, Alycia W. Crall, Thomas J. Stohlgren, Paul Evangelista
2010, Future Internet (2) 624-634
Predicting current and potential species distributions and abundance is critical for managing invasive species, preserving threatened and endangered species, and conserving native species and habitats. Accurate predictive models are needed at local, regional, and national scales to guide field surveys, improve monitoring, and set priorities for conservation and restoration. Modeling...
Saltcedar and Russian olive interactions with wildlife: Chapter 4
Heather L. Bateman, Eben H. Paxton
2010, Book chapter, Saltcedar and Russian Olive Control Demonstration Act Science Assessment (Scientific Investigations Report 2009–5247)
Riparian areas of flood plains typically provide a mosaic of productive habitats (Stanford and others, 2005; Latterell and others, 2006) capable of supporting many wildlife species, particularly in the arid and semiarid Western United States. The establishment of nonnative invasive plants can alter riparian habitat by inhibiting native plant recruitment...
Restoration and revegetation associated with control of saltcedar and Russian olive: Chapter 7
Patrick B. Shafroth, David M. Merritt, Vanessa B. Beauchamp, Kenneth D. Lair
2010, Book chapter, Saltcedar and Russian Olive Control Demonstration Act Science Assessment (Scientific Investigations Report 2009–5247)
Rationales for controlling or eliminating saltcedar and Russian olive from sites, river reaches, or entire streams include implicit or explicit assumptions that natural recovery or applied restoration of native plant communities will follow exotic plant removal (McDaniel and Taylor, 2003; Quimby and others, 2003). The vegetation that replaces saltcedar and...
Distribution and abundance of Saltcedar and Russian Olive in the western United States: Chapter 2
Pamela L. Nagler, Edward P. Glenn, Catherine S. Jarnevich, Patrick B. Shafroth
2010, Book chapter, Saltcedar and Russian Olive Control Demonstration Act Science Assessment (Scientific Investigations Report 2009–5247)
Public Law 109-320 calls for “…an assessment of the extent of saltcedar and Russian olive infestation on public and private land in the western United States.” Saltcedar (Tamarix spp.; also known as tamarisk) and Russian olive (Elaeagnus angustifolia) are now frequent and abundant components of the woody riparian vegetation along...
Potential economic benefits of adapting agricultural production systems to future climate change
Daniel B. Fagre, Gregory Pederson, Lindsey E. Bengtson, Tony Prato, Zeyuan Qui, Jimmie R. Williams
2010, Environmental Management (45) 577-589
Potential economic impacts of future climate change on crop enterprise net returns and annual net farm income (NFI) are evaluated for small and large representative farms in Flathead Valley in Northwest Montana. Crop enterprise net returns and NFI in an historical climate period (1960–2005) and future climate period (2006–2050) are...
Modern climate challenges and the geological record
Thomas M. Cronin
2010, American Paleontologist (18) 10-12
Today's changing climate poses challenges about the influence of human activity, such as greenhouse gas emissions and land use changes, the natural variability of Earth's climate, and complex feedback processes. Ice core and instrumental records show that over the last century, atmospheric carbon dioxide (CO2) concentrations have risen to 390...
Demonstration projects and long-term considerations associated with saltcedar and Russian olive control and riparian restoration: Chapter 8
David M. Merritt, Patrick B. Shafroth
2010, Book chapter, Saltcedar and Russian Olive Control Demonstration Act Science Assessment (Scientific Investigations Report 2009–5247)
Whereas the primary intent of this document is to provide the science assessment called for under The Saltcedar and Russian Olive Control Demonstration Act (“the Act”), a secondary purpose is to provide a common background for applicants to develop prospective demonstration projects. Conducting demonstration projects is a second phase of...
The potential for water savings through the control of saltcedar and Russian olive: Chapter 3
Pamela L. Nagler, Patrick B. Shafroth, James W. LaBaugh, Keirith A. Snyder, Russell L. Scott, David M. Merritt, John Osterberg
2010, Book chapter, Saltcedar and Russian Olive Control Demonstration Act Science Assessment (Scientific Investigations Report 2009–5247)
This chapter discusses the components of the water budget for a riparian system containing large stands of saltcedar or Russian olive—that is, how water is used by the plant community and how that use affects both streamflow volume and groundwater levels. The relation of water availability to the hydrologic cycle...
Saltcedar and Russian olive control demonstration act science assessment [Executive summary]
Pamela L. Nagler, Patrick B. Shafroth, James W. LaBaugh, Keirith A. Snyder, Russell L. Scott, David M. Merritt, John Osterberg
2010, Book chapter, Saltcedar and Russian Olive Control Demonstration Act Science Assessment (Scientific Investigations Report 2009–5247)
The primary intent of this document is to provide the science assessment called for under The Saltcedar and Russian Olive Control Demonstration Act of 2006 (Public Law 109–320; the Act). A secondary purpose is to provide a common background for applicants for prospective demonstration projects, should funds be appropriated for...
Mid-Piacenzian sea surface temperature record from ODP Site 1115 in the western equatorial Pacific
Danielle Stoll
2010, Stratigraphy (7) 1-6
Planktic foraminifer assemblages and alkenone unsaturation ratios have been analyzed for the mid-Piacen-zian (3.3 to 2.9 Ma) section of Ocean Drilling Program (ODP) Site 1115B, located in the western equatorial Pacific off the coast of New Guinea. Cold and warm season sea surface temperature (SST) estimates were determined using a...
Novel silver tubing method for quantitative introduction of water into high temperature conversion systems for stable hydrogen and oxygen isotopic measurements
Haiping Qi, Manfred Groning, Tyler B. Coplen, Bryan Buck, Stanley J. Mroczkowski, Willi A. Brand, Heike Geilmann, Matthias Gehre
2010, Rapid Communications in Mass Spectrometry (24) 1821-1827
A new method to seal water in silver tubes for use in a TC/EA reduction unit using a semi-automated sealing apparatus can yield reproducibilities (1 standard deviation) of δ2H and &delta18O measurements of 1.0 ‰ and 0.06 ‰, respectively. These silver tubes containing reference waters may be preferred for calibration...
Nodeomics: Pathogen detection in vertebrate lymph nodes using meta-transcriptomics
Nicola E. Wittekindt, Abinash Padhi, Stephan C. Schuster, Ji Qi, Fangqing Zhao, Lynn P. Tomsho, Lindsay R. Kasson, Michael Packard, Paul C. Cross, Mary Poss
2010, PLoS (5) 1-10
The ongoing emergence of human infections originating from wildlife highlights the need for better knowledge of the microbial community in wildlife species where traditional diagnostic approaches are limited. Here we evaluate the microbial biota in healthy mule deer (Odocoileus hemionus) by analyses of lymph node meta-transcriptomes. cDNA libraries from five...
