Comparison of evapotranspiration rates for flatwoods and ridge citrus
X. Jia, A. Swancar, J.M. Jacobs, M.D. Dukes, K. Morgan
2007, Transactions of the ASABE (50) 83-94
Florida citrus groves are typically grown in two regions of the state: flatwoods and ridge. The southern flatwoods citrus area has poorly drained fine textured sands with low organic matter in the shallow root zone. Ridge citrus is located in the northern ridge citrus zone and has fine to coarse...
A simple model for calculating tsunami flow speed from tsunami deposits
B. E. Jaffe, G. Gelfenbuam
2007, Sedimentary Geology (200) 347-361
This paper presents a simple model for tsunami sedimentation that can be applied to calculate tsunami flow speed from the thickness and grain size of a tsunami deposit (the inverse problem). For sandy tsunami deposits where grain size and thickness vary gradually...
Characterising reef fish populations and habitats within and outside the US Virgin Islands Coral Reef National Monument: A lesson in marine protected area design
Mark E. Monaco, A. M. Friedlander, Chris Caldow, J.D. Christensen, C. Rogers, J. Beets, J. Miller, Rafe Boulon
2007, Fisheries Management and Ecology (14) 33-40
Marine protected areas are an important tool for management of marine ecosystems. Despite their utility, ecological design criteria are often not considered or feasible to implement when establishing protected areas. In 2001, the Virgin Islands Coral Reef National Monument (VICRNM) in St John, US Virgin Islands was established by Executive...
Inflammatory reaction to fabric collars from percutaneous antennas attached to intracoelomic radio transmitters implanted in harlequin ducks (Histrionicus histrionicus)
Daniel M. Mulcahy, K.A. Burek, Daniel Esler
2007, Journal of Avian Medicine and Surgery (21) 13-21
In wild birds implanted intracoelomically with radio transmitters, a synthetic fabric collar placed around the base of a percutaneous antenna is believed to function as a barrier to contamination of the coelom. We examined 13 fabric collars recovered from percutaneous antennas of radio transmitters implanted intracoelomically in harlequin ducks (Histrionicus...
Age and trophic position dominate bioaccumulation of mercury and organochlorines in the food web of Lake Washington
J.K. McIntyre, D.A. Beauchamp
2007, Science of the Total Environment (372) 571-584
Understanding the mechanisms of bioaccumulation in food webs is critical to predicting which food webs are at risk for higher rates of bioaccumulation that endanger the health of upper-trophic predators, including humans. Mercury and organochlorines were measured concurrently with stable isotopes of nitrogen and carbon in key fishes and invertebrates...
Population status of North American green sturgeon, Acipenser medirostris
P.B. Adams, C. Grimes, J.E. Hightower, S.T. Lindley, M.L. Moser, M.J. Parsley
2007, Environmental Biology of Fishes (79) 339-356
North American green sturgeon, Acipenser medirostris, was petitioned for listing under the Endangered Species Act (ESA). The two questions that need to be answered when considering an ESA listing are; (1) Is the entity a species under the ESA and if so (2) is the "species" in danger of extinction...
Can parasites be indicators of free-living diversity? Relationships between species richness and the abundance of larval trematodes and of local benthos and fishes
R. F. Hechinger, K. D. Lafferty, T.C. Huspeni, A.J. Brooks, A. M. Kuris
2007, Oecologia (151) 82-92
Measuring biodiversity is difficult. This has led to efforts to seek taxa whose species richness correlates with the species richness of other taxa. Such indicator taxa could then reduce the time and cost of assessing the biodiversity of the more extensive community. The search for species richness correlations has yielded...
First evidence of egg deposition by walleye (Sander vitreus) in the Detroit River
B.A. Manny, G.W. Kennedy, J.D. Allen, J. R. P. French III
2007, Journal of Great Lakes Research (33) 512-516
The importance of fish spawning habitat in channels connecting the Great Lakes to fishery productivity in those lakes is poorly understood and has not been adequately documented. The Detroit River is a reputed spawning and nursery area for many fish, including walleye (Sander vitreus) that migrate between adjacent Lakes Erie...
Linking occurrence and fitness to persistence: Habitat-based approach for endangered Greater Sage-Grouse
Cameron L. Aldridge, Mark S. Boyce
2007, Ecological Applications (17) 508-526
Detailed empirical models predicting both species occurrence and fitness across a landscape are necessary to understand processes related to population persistence. Failure to consider both occurrence and fitness may result in incorrect assessments of habitat importance leading to inappropriate management strategies. We took a two-stage approach to identifying critical nesting...
Factors that influence the extraction of polycyclic aromatic hydrocarbons from coal
J. Xue, Gaisheng Liu, Z. Niu, C. L. Chou, C. Qi, Lingyun Zheng, H. Zhang
2007, Energy and Fuels (21) 881-890
Coal samples and carbonaceous mudstone were collected from the Huaibei coalfield, China, and experiments investigating the factors influencing the extraction of the sixteen US EPA (Environmental Protection Agency) priority polycyclic aromatic hydrocarbons (PAHs) were carried out. Different extraction times, solvents, and methods were used. Major interest was focused on finding...
Costimulatory receptors in jawed vertebrates: Conserved CD28, odd CTLA4 and multiple BTLAs
D. Bernard, J.D. Hansen, Pasquier L. Du, M.-P. Lefranc, A. Benmansour, P. Boudinot
2007, Developmental and Comparative Immunology (31) 255-271
CD28 family of costimulatory receptors is comprised of molecules with a single V-type extracellular Ig domain, a transmembrane and an intracytoplasmic region with signaling motifs. CD28 and cytotoxic T lymphocyte antigen-4 (CTLA4) homologs have been recently identified in rainbow trout. Other sequences similar to mammalian CD28 family members have now...
Evaluation of an experimental LiDAR for surveying a shallow, braided, sand-bedded river
P.J. Kinzel, C. W. Wright, J. M. Nelson, A.R. Burman
2007, Journal of Hydraulic Engineering (133) 838-842
Reaches of a shallow (<1.0m), braided, sand-bedded river were surveyed in 2002 and 2005 with the National Aeronautics and Space Administration's Experimental Advanced Airborne Research LiDAR (EAARL) and concurrently with conventional survey-grade, real-time kinematic, global positioning system technology. The laser pulses transmitted by the EAARL instrument and the return backscatter...
Diel mercury-concentration variations in streams affected by mining and geothermal discharge
David A. Nimick, R. Blaine McCleskey, C.H. Gammons, Tom Cleasby, S.R. Parker
2007, Science of the Total Environment (373) 344-355
Diel variations of concentrations of unfiltered and filtered total Hg and filtered methyl Hg were documented during 24-h sampling episodes in water from Silver Creek, which drains a historical gold-mining district near Helena, Montana, and the Madison River, which drains the geothermal system of Yellowstone National Park. The concentrations of...
Geostatistical three-dimensional modeling of oolite shoals, St. Louis Limestone, southwest Kansas
L. Qi, T.R. Carr, R.H. Goldstein
2007, American Association of Petroleum Geologists Bulletin (91) 69-96
In the Hugoton embayment of southwestern Kansas, reservoirs composed of relatively thin (<4 m; <13.1 ft) oolitic deposits within the St. Louis Limestone have produced more than 300 million bbl of oil. The geometry and distribution of oolitic deposits control the heterogeneity of the reservoirs, resulting in exploration challenges and...
Climate correlates of 20 years of trophic changes in a high-elevation riparian system
T. E. Martin
2007, Ecology (88) 367-380
The consequences of climate change for ecosystem structure and function remain largely unknown. Here, I examine the ability of climate variation to explain long-term changes in bird and plant populations, as well as trophic interactions in a high-elevation riparian system in central Arizona, USA, based on 20 years of study....
Impact of prescribed fire and other factors on cheatgrass persistence in a Sierra Nevada ponderosa pine forest
Jon E. Keeley, T.W. McGinnis
2007, International Journal of Wildland Fire (16) 96-106
Following the reintroduction of fire Bromus tectorum has invaded the low elevation ponderosa pine forests in parts of Kings Canyon National Park, California. We used prescribed burns, other field manipulations, germination studies, and structural equation modelling, to investigate how fire and other factors affect the persistence of cheatgrass in these...
The Russell gold deposit, Carolina Slate Belt, North Carolina
T. L. Klein, C. G. Cunningham, M.A.V. Logan, R.R. Seal II
2007, Economic Geology (102) 239-256
Gold deposits have been mined in the Carolina slate belt from the early 1800s to recent times, with most of the production from large mines in South Carolina. The Russell mine, one of the larger producers in North Carolina, is located in the central Uwharrie Mountains, and produced over 470...
A new species of Tallaperla (Plecoptera: Peltoperlidae) from North Carolina, U.S.A.
B.C. Kondratieff, R.F. Kirchner, R.E. Zuellig, D. R. Lenat
2007, Entomological News (118) 81-82
A new species of Tallaperla, T. maiyae, is described from Wilkes County, North Carolina, U.S.A. from two males. The new species is similar to T. maria and T. anna, but can be distinguished by the combination of a prominent spine-like epiproct and brown coloration....
Improving the accuracy of sediment-associated constituent concentrations in whole storm water samples by wet-sieving
W.R. Selbig, R. Bannerman, G. Bowman
2007, Journal of Environmental Quality (36) 226-232
Sand-sized particles (>63 ??m) in whole storm water samples collected from urban runoff have the potential to produce data with substantial bias and/or poor precision both during sample splitting and laboratory analysis. New techniques were evaluated in an effort to overcome some of the limitations associated with sample splitting and...
Thermal infrared reflectance and emission spectroscopy of quartzofeldspathic glasses
J.M. Byrnes, M.S. Ramsey, P.L. King, R.J. Lee
2007, Geophysical Research Letters (34)
This investigation seeks to better understand the thermal infrared (TIR) spectral characteristics of naturally-occurring amorphous materials through laboratory synthesis and analysis of glasses. Because spectra of glass phases differ markedly from their mineral counterparts, examination of glasses is important to accurately determine the composition of amorphous surface materials using remote...
Conditions for coexistence of freshwater mussel species via partitioning of fish host resources
Brenda Rashleigh, D.L. DeAngelis
2007, Ecological Modelling (201) 171-178
Riverine freshwater mussel species can be found in highly diverse communities where many similar species coexist. Mussel species potentially compete for food and space as adults, and for fish host resources during the larval (glochidial) stage. Resource partitioning at the larval stage may promote coexistence. A model of resource utilization...
Nitrate retention in riparian ground water at natural and elevated nitrate levels in North Central Minnesota
J.H. Duff, A. P. Jackman, F.J. Triska, R.W. Sheibley, R.J. Avanzino
2007, Journal of Environmental Quality (36) 343-353
The relationship between local ground water flows and NO3− transport to the channel was examined in three well transects from a natural, wooded riparian zone adjacent to the Shingobee River, MN. The hillslope ground water originated as recharge from intermittently grazed pasture up slope of the site. In the hillslope...
Robust 24 ± 6 ka 40Ar/39Ar age of a low-potassium tholeiitic basalt in the Lassen region of NE California
Brent D. Turrin, L.J. Patrick Muffler, Michael A. Clynne, Duane E. Champion
2007, Quaternary Research (68) 96-110
40Ar/39Ar ages on the Hat Creek Basalt (HCB) and stratigraphically related lava flows show that latest Pleistocene tholeiitic basalt with very low K2O can be dated reliably. The HCB underlies ∼ 15 ka glacial gravel and overlies four andesite and basaltic andesite lava flows that yield 40Ar/39Ar ages of 38 ± 7 ka (Cinder Butte; 1.65%...
Response of brown treesnakes to reduction of their rodent prey
J.E. Gragg, G.H. Rodda, J. A. Savidge, Gary C. White, K. Dean-Bradley, A.R. Ellingson
2007, Journal of Wildlife Management (71) 2311-2317
Trapping brown treesnakes (Boiga irregularis; BTS) with live-mouse (Mus domesticus) lures is the principal control technique for this invasive species on Guam. Lure-based trapping is also used on other islands as a precaution against undetected arrivals and in response to verified BTS sightings. However, the effectiveness of lure-based trapping on...
Multi-interferogram method for measuring interseismic deformation: Denali Fault, Alaska
Juliet Biggs, Tim Wright, Zhong Lu, Barry Parsons
2007, Geophysical Journal International (170) 1165-1179
Studies of interseismic strain accumulation are crucial to our understanding of continental deformation, the earthquake cycle and seismic hazard. By mapping small amounts of ground deformation over large spatial areas, InSAR has the potential to produce continental-scale maps of strain accumulation on active faults. However, most InSAR studies to date...
