Butterfly responses to prairie restoration through fire and grazing
Jennifer A. Vogel, Diane M. Debinski, Rolf R. Koford, J.R. Miller
2007, Biological Conservation (140) 78-90
The development of land for modern agriculture has resulted in losses of native prairie habitat. The small, isolated patches of prairie habitat that remain are threatened by fire suppression, overgrazing, and invasion by non-native species. We evaluated the effects of three restoration practices (grazing only, burning only, and burning and...
Use of dissolved chloride concentrations in tributary streams to support geospatial estimates of Cl contamination potential near Skiatook Lake, northeastern Oklahoma
C. A. Rice, M.M. Abbott, R. A. Zielinski
2007, Applied Geochemistry (22) 2193-2206
Releases of NaCl-rich (>100 000 mg/L) water that is co-produced from petroleum wells can adversely affect the quality of ground and surface waters. To evaluate produced water impacts on lakes, rivers and streams, an assessment of the contamination potential must be attainable using reliable and cost-effective methods. This study examines...
The reality of reserve growth
Mahendra K. Verma
2007, GEO ExPro (4) 34-35
No abstract available....
Physically based estimation of soil water retention from textural data: General framework, new models, and streamlined existing models
John R. Nimmo, William N. Herkelrath, Luna Laguna
2007, Vadose Zone Journal (6) 766-773
Numerous models are in widespread use for the estimation of soil water retention from more easily measured textural data. Improved models are needed for better prediction and wider applicability. We developed a basic framework from which new and existing models can be derived to facilitate improvements. Starting from the assumption...
Assessments of habitat preferences and quality depend on spatial scale and metrics of fitness
A.D. Chalfoun, T. E. Martin
2007, Journal of Applied Ecology (44) 983-992
1. Identifying the habitat features that influence habitat selection and enhance fitness is critical for effective management. Ecological theory predicts that habitat choices should be adaptive, such that fitness is enhanced in preferred habitats. However, studies often report mismatches between habitat preferences and fitness consequences across a wide variety of...
The abundance and distribution of diamondoids in biodegraded oils from the San Joaquin Valley: Implications for biodegradation of diamondoids in petroleum reservoirs
Z. Wei, J.M. Moldowan, K. E. Peters, Y. Wang, W. Xiang
2007, Organic Geochemistry (38) 1910-1926
The biodegradability of diamondoids was investigated using a collection of crude oil samples from the San Joaquin Valley, California, that had been biodegraded to varying extent in the reservoir. Our results show that diamondoids are subjected to biodegradation, which is selective as well as stepwise. Adamantanes are generally more susceptible...
Effects of dam removal on brook trout in a Wisconsin stream
E.H. Stanley, M.J. Catalano, N. Mercado-Silva, C.H. Orr
2007, River Research and Applications (23) 792-798
Dams create barriers to fish migration and dispersal in drainage basins, and the removal of dams is often viewed as a means of increasing habitat availability and restoring migratory routes of several fish species. However, these barriers can also isolate and protect native taxa from aggressive downstream invaders. We examined...
Field test comparison of an autocorrelation technique for determining grain size using a digital 'beachball' camera versus traditional methods
P.L. Barnard, D. M. Rubin, J. Harney, N. Mustain
2007, Sedimentary Geology (201) 180-195
This extensive field test of an autocorrelation technique for determining grain size from digital images was conducted using a digital bed-sediment camera, or 'beachball' camera. Using 205 sediment samples and >1200 images from a variety of beaches on the west coast of the US, grain size ranging from sand to...
Northeast Kansas well tests oil, gas possibilities in Precambrian rocks
D. F. Merriam, K.D. Newell, J.H. Doveton, L.M. Magnuson, B.S. Lollar, W.M. Waggoner
2007, Oil & Gas Journal (105) 54-58
Tests for oil and gas prospects in Precambrian rocks in Northeast Kansas is currently being undertaken by WTW Operating LLC. It drilled in late 2005 the no.1 Wilson well with a depth of 5,772ft, 1,826ft into the Precambrian basement on a venture testing the possibility of oil and gas in...
Intra- and interlaboratory variability in acute toxicity tests with glochidia and juveniles of freshwater mussels (Unionidae)
N. Wang, T. Augspurger, M.C. Barnhart, Joseph R. Bidwell, W.G. Cope, F.J. Dwyer, S. Geis, I.E. Greer, C.G. Ingersoll, C.M. Kane, T.W. May, R. J. Neves, T.J. Newton, A.D. Roberts, D.W. Whites
2007, Environmental Toxicology and Chemistry (26) 2029-2035
The present study evaluated the performance and variability in acute toxicity tests with glochidia and newly transformed juvenile mussels using the standard methods outlined in American Society for Testing and Materials (ASTM). Multiple 48-h toxicity tests with glochidia and 96-h tests with juvenile mussels were conducted within a single laboratory...
Microbial sulfate reduction and metal attenuation in pH 4 acid mine water
C.D. Church, R.T. Wilkin, Charles N. Alpers, R. O. Rye, R.B. Blaine
2007, Geochemical Transactions (8)
Sediments recovered from the flooded mine workings of the Penn Mine, a Cu-Zn mine abandoned since the early 1960s, were cultured for anaerobic bacteria over a range of pH (4.0 to 7.5). The molecular biology of sediments and cultures was studied to determine whether sulfate-reducing bacteria (SRB) were active in...
Three-dimensional geophysical mapping of rock alteration and water content at Mount Adams, Washington: Implications for lahar hazards
C. A. Finn, M. Deszcz-Pan, E. D. Anderson, D. A. John
2007, Journal of Geophysical Research B: Solid Earth (112)
[1] Hydrothermally altered rocks, particularly if water saturated, can weaken stratovolcanoes, thereby increasing the potential for catastrophic sector collapses that can lead to far-traveled, destructive debris flows. Evaluating the hazards associated with such alteration is difficult because alteration has been mapped on few active volcanoes...
Survival of breeding Pacific common eiders on the Yukon-Kuskokwim Delta, Alaska
H.M. Wilson, Paul L. Flint, Christine L. Moran, A.N. Powell
2007, Journal of Wildlife Management (71) 403-410
Populations of Pacific common eiders (Somateria mollissima v-nigrum) breeding in Alaska, USA, have declined markedly over the past 40 years. We studied survival of adult female Pacific common eiders using capture—recapture of nesting hens at 3 sites on the Yukon-Kuskokwim Delta (YKD), Alaska from 1994 to 2004. We used data...
Analysis of multiple enteric viral targets as sewage markers in coral reefs
Erin K. Lipp, J. Carrie Futch, Dale W. Griffin
2007, Marine Pollution Bulletin (54) 1897-1902
Water and coral mucus samples were collected from throughout the Florida Keys National Marine Sanctuary and the Dry Tortugas for three years and were analyzed for human enteric viruses (enteroviruses, noroviruses, hepatitis A virus and adenoviruses) as conservative markers of human sewage using molecular methods. Of the 100 coral and...
Recent records of alien anurans on the Pacific Island of Guam
M.T. Christy, C.S. Clark, D.E. Gee II, D. Vice, D.S. Vice, M.P. Warner, C.L. Tyrrell, G.H. Rodda, J. A. Savidge
2007, Pacific Science (61) 469-483
Eight anuran species were recorded for the first time in Guam in the period May 2003-December 2005, all apparently the result of arrivals to the island since 2000. Three of the eight species (Rana guentheri, Polypedates megacephalus, and Eleutherodactylus planirostris) had well-established breeding populations by 2005. A further three (Fejevarya...
Diel changes in water chemistry in an arsenic-rich stream and treatment-pond system
C.H. Gammons, T.M. Grant, David A. Nimick, S.R. Parker, M.D. DeGrandpre
2007, Science of the Total Environment (384) 433-451
Arsenic concentrations are elevated in surface waters of the Warm Springs Ponds Operable Unit (WSPOU), located at the head of the upper Clark Fork River Superfund site, Montana, USA. Arsenic is derived from historical deposition of smelter emissions (Mill and Willow Creeks) and historical mining and milling wastes (Silver Bow...
Effects of aqueous exposure to polychlorinated biphenyls (Aroclor 1254) on physiology and behavior of smolt development of Atlantic salmon
D.T. Lerner, Bjorn Thrandur Bjornsson, S. D. McCormick
2007, Aquatic Toxicology (81) 329-336
Polychlorinated biphenyls (PCBs) are a widespread aquatic contaminant and are present in both wild and hatchery raised Atlantic salmon, Salmo salar. The possible sub-lethal alterations in smolt physiology and behavior due to PCB exposure of salmon have not been widely examined. In this study, we examined the effects of the...
Population demographics of Hiodon tergisus (Mooneye) in the lower Tallapoosa River
C.T. Katechis, P.C. Sakaris, E.R. Irwin
2007, Southeastern Naturalist (6) 461-470
We describe age structure, growth, and fecundity of Hiodon tergisus (Mooneye) from the lower Tallapoosa River, AL. Mooneye (N = 49, 214-316 mm total length, 79-284 g) were aged using otoliths, and a von Bertalanffy growth model was derived for the species (L??? = 316, K = 0.285, to =...
An estimate of carbon emissions from 2004 wildfires across Alaskan Yukon River Basin
Zhengxi Tan, Larry L. Tieszen, Zhiliang Zhu, Shuguang Liu, Stephen M. Howard
2007, Carbon Balance and Management (2) 1-8
BackgroundWildfires are an increasingly important component of the forces that drive the global carbon (C) cycle and climate change as progressive warming is expected in boreal areas. This study estimated C emissions from the wildfires across the Alaskan Yukon River Basin in 2004. We spatially related...
Influence of groundwater pumping on streamflow restoration following upstream dam removal
James E. Constantz, Hedeff I. Essaid
2007, Hydrological Processes (21) 2823-2834
We compared streamflow in basins under the combined impacts of an upland dam and groundwater pumping withdrawals, by examining streamflow in the presence and absence of each impact. As a qualitative analysis, inter-watershed streamflow comparisons were performed for several rivers flowing into the east side...
Raptor mortality due to West Nile virus in the United States, 2002
E.K. Saito, L. Sileo, D. E. Green, C.U. Meteyer, G.S. McLaughlin, K. A. Converse, D. E. Docherty
2007, Journal of Wildlife Diseases (43) 206-213
West Nile virus (WNV) has affected many thousands of birds since it was first detected in North America in 1999, but the overall impact on wild bird populations is unknown. In mid-August 2002, wildlife rehabilitators and local wildlife officials from multiple states began reporting increasing numbers of sick and dying...
USGS assessment of undiscovered oil and gas resources for the Oligocene Frio and Anahuac formations, U.S. Gulf of Mexico coastal plain and state waters: Review of assessment units
Sharon M. Swanson, Alexander W. Karlsen, Peter D. Warwick
Lorcan Kennan, James Pindell, Norman C. Rosen, editor(s)
2007, Conference Paper, The Paleogene of the Gulf of Mexico and Caribbean basins: Processes, events, and petroleum systems
The Oligocene Frio and Anahuac formations were examined by the U.S. Geological Survey (USGS) as part of an assessment of technically recoverable undiscovered conventional and unconventional hydrocarbon resources in Paleogene and Neogene strata underlying the U.S. Gulf of Mexico Coastal Plain and state waters. Work included the identification of structural,...
Mapping impervious surfaces using classification and regression tree algorithm
G. Xian
Q. Weng, editor(s)
2007, Book chapter, Remote sensing of impervious surfaces
No abstract available....
Gravity and magnetic studies to characterize the geologic framework of the Spring Valley region
Edward A. Mankinen
2007, Book chapter, Regional Tour of the Carbonate System Guidebook
No abstract available....
Alaskan birds at risk: Widespread beak deformities in resident species
Caroline R. Van Hemert
2007, Birding (39) 48-55
The team creeps silently across a well-tended lawn, eyes drawn to a small wooden box perched several meters up a lone birch tree. The first biologist is armed with a broom in one hand and a bug net in the other. Her partner wields a lunchbox-sized plastic case and a...
