Effects of ACTH, capture, and short term confinement on glucocorticoid concentrations in harlequin ducks (Histrionicus histrionicus)
P.B. Nilsson, Tuula E. Hollmén, S. Atkinson, K.L. Mashburn, P.A. Tuomi, Daniel Esler, D.M. Mulcahy, D.J. Rizzolo
2008, Comparative Biochemistry and Physiology, Part A: Molecular & Integrative Physiology (149) 275-283
Little is known about baseline concentrations of adrenal hormones and hormonal responses to stress in sea ducks, although significant population declines documented in several species suggest that sea ducks are exposed to increased levels of environmental stress. Such declines have been observed in geographically distinct harlequin duck populations. We performed...
Concentrations of trace elements in blood and skin of Florida manatees (Trichechus manatus latirostris)
H.-C.W. Stavros, R. K. Bonde, P.A. Fair
2008, Marine Pollution Bulletin (56) 1221-1225
[No abstract available]...
Composition and quality of coals in the Huaibei Coalfield, Anhui, China
Lingyun Zheng, Gaisheng Liu, L. Wang, C. L. Chou
2008, Journal of Geochemical Exploration (97) 59-68
The Huaibei Coalfield, Anhui Province, China, is one of the largest coalfields in China. The coals of Permian age are used mainly for power generation. Coal compositions and 47 trace elements of the No. 10 Coal of the Shanxi Formation, the No. 7, 5, and 4 Coals of the Lower...
Does biodiversity-ecosystem function science apply to Prairie restoration?
Amy J. Symstad
2008, Ecological Restoration (26) 100-102
No abstract available....
The release of dissolved actinium to the ocean: A global comparison of different end-members
W. Geibert, M. Charette, G. Kim, W.S. Moore, J. Street, M. Young, A. Paytan
2008, Marine Chemistry (109) 409-420
The measurement of short-lived 223Ra often involves a second measurement for supported activities, which represents 227Ac in the sample. Here we exploit this fact, presenting a set of 284 values on the oceanic distribution of 227Ac, which was collected when analyzing water samples for short-lived radium isotopes by the radium...
Assessment of propeller and off-road vehicle scarring in seagrass beds and wind-tidal flats of the southwestern Gulf of Mexico
S.R. Martin, C.P. Onuf, K.H. Dunton
2008, Botanica Marina (51) 79-91
We used aerial photography and GIS to establish a quantitative baseline of propeller and off-road vehicle (ORV) scarring in seagrass and wind-tidal flats of the upper Laguna Madre in the Padre Island National Seashore (Texas, USA). We also examined scar recovery through comparison of recent (2002, 2005) and historical (1967)...
Utility of shallow-water ATRIS images in defining biogeologic processes and self-similarity in skeletal scleractinia, Florida reefs
B. H. Lidz, J. C. Brock, D.B. Nagle
2008, Conference Paper, Journal of Coastal Research
A recently developed remote-sensing instrument acquires high-quality digital photographs in shallow-marine settings within water depths of 15 m. The technology, known as the Along-Track Reef-Imaging System, provides remarkably clear, georeferenced imagery that allows visual interpretation of benthic class (substrates, organisms) for mapping coral reef habitats, as intended. Unforeseen, however, are...
Priorities for future research on planetary dunes
T.N. Titus, N. Lancaster, R. Hayward, L. Fenton, M. Bourke
2008, Conference Paper, Eos
[No abstract available]...
Carbonate precipitation by the thermophilic archaeon Archaeoglobus fulgidus: A model of carbon flow for an ancient microorganism
L. L. Robbins, K. A. Van Cleave, P. Ostrom
2008, Biogeosciences Discussions (5) 3409-3432
Microbial carbonate precipitation experiments were conducted using the archaeon bacteria Archaeoglobus fulgidus to determine chemical and isotopic fractionation of organic and inorganic carbon into mineral phases. Carbonate precipitation was induced in two different experiments using A. fulgidus to determine the relative abundance of organically derived carbon incorporated into carbonate minerals...
The effects of land use on fluvial sediment chemistry for the conterminous U.S. - Results from the first cycle of the NAWQA Program: Trace and major elements, phosphorus, carbon, and sulfur
A. J. Horowitz, V. C. Stephens
2008, Science of the Total Environment (400) 290-314
In 1991, the U.S. Geological Survey (USGS) began the first cycle of its National Water Quality Assessment (NAWQA) Program. The Program encompassed 51 river basins that collectively accounted for more than 70% of the total water use (excluding power generation), and 50% of the drinking water supply in the U.S....
Trichinella murrelli in scavenging mammals from south-central Wisconsin, USA
D.E. Hill, M.D. Samuel, C.A. Nolden, N. Sundar, D.S. Zarlenga, J. P. Dubey
2008, Journal of Wildlife Diseases (44) 629-635
Tissues and serum from 59 raccoons (Procyon lotor), 42 coyotes (Canis latrans), and seven Striped Skunks (Mephitis mephitis) collected in Dane and Iowa Counties, Wisconsin, USA, between October 2005 and March 2006 were microscopically and serologically examined for the presence of Trichinella spp. Encapsulated larvae were found on compression slides...
Avian wildlife mortality events due to salmonellosis in the United States, 1985-2004
A.J. Hall, E.K. Saito
2008, Journal of Wildlife Diseases (44) 585-593
Infection with Salmonella spp. has long been recognized in avian wildlife, although its significance in causing avian mortality, and its zoonotic risk, is not well understood. This study evaluates the role of Salmonella spp. in wild bird mortality events in the United States from 1985 through 2004. Analyses were performed to calculate the frequency...
On the origin and age of the Great Sand Dunes, Colorado
R.F. Madole, J.H. Romig, J. N. Aleinikoff, D.P. VanSistine, E.Y. Yacob
2008, Geomorphology (99) 99-119
Over the past 100??yr, several hypotheses have been proposed for the origin and age of the Great Sand Dunes. These hypotheses differ widely in the descriptions of dune morphometry, the immediate source of eolian sand, and when sand transport occurred. The primary purpose of this paper is to evaluate these...
Nutrient availability affects pigment production but not growth in lichens of biological soil crusts
M. A. Bowker, G.W. Koch, J. Belnap, N.C. Johnson
2008, Soil Biology and Biochemistry (40) 2819-2826
Recent research suggests that micronutrients such as Mn may limit growth of slow-growing biological soil crusts (BSCs) in some of the drylands of the world. These soil surface communities contribute strongly to arid ecosystem function and are easily degraded, creating a need for new restoration tools. The possibility that Mn...
Evolution of CO2 in Lakes Monoun and Nyos, Cameroon, before and during controlled degassing
M. Kusakabe, T. Ohba, Issa, Y. Yoshida, H. Satake, T. Ohizumi, William C. Evans, G. Tanyileke, G.W. Kling
2008, Geochemical Journal (42) 93-118
Evolution of CO2 in Lakes Monoun and Nyos (Cameroon) before and during controlled degassing is described using results of regular monitoring obtained during the last 21 years. The CO2(aq) profiles soon after the limnic eruptions were estimated for Lakes Monoun and Nyos using the CTD data obtained in October and November 1986,...
Improvements in the use of aquatic herbicides and establishment of future research directions
K.D. Getsinger, M.D. Netherland, C.E. Grue, T.J. Koschnick
2008, Conference Paper, Journal of Aquatic Plant Management
Peer-reviewed literature over the past 20 years identifies significant changes and improvements in chemical control strategies used to manage nuisance submersed vegetation. The invasive exotic plants hydrilla (Hydrilla verticillata L.f. Royle) and Eurasian watermilfoil (Myriophyllum spicatum L.) continue to spread and remain the plant species of greatest concern for aquatic...
Comparison of total mercury and methylmercury cycling at five sites using the small watershed approach
J. B. Shanley, Mast M. Alisa, K. Campbell, G. R. Aiken, D. P. Krabbenhoft, R. J. Hunt, J.F. Walker, P. F. Schuster, A. Chalmers, Brent T. Aulenbach, N.E. Peters, M. Marvin-DiPasquale, D. W. Clow, M.M. Shafer
2008, Environmental Pollution (154) 143-154
The small watershed approach is well-suited but underutilized in mercury research. We applied the small watershed approach to investigate total mercury (THg) and methylmercury (MeHg) dynamics in streamwater at the five diverse forested headwater catchments of the US Geological Survey Water, Energy, and...
Change-in-ratio density estimator for feral pigs is less biased than closed mark-recapture estimates
L.B. Hanson, J.B. Grand, M.S. Mitchell, D.B. Jolley, B.D. Sparklin, S.S. Ditchkoff
2008, Wildlife Research (35) 695-699
Closed-population capture-mark-recapture (CMR) methods can produce biased density estimates for species with low or heterogeneous detection probabilities. In an attempt to address such biases, we developed a density-estimation method based on the change in ratio (CIR) of survival between two populations where survival, calculated using an open-population CMR model, is...
Estimating groundwater recharge in Hebei Plain, China under varying land use practices using tritium and bromide tracers
B. Wang, M. Jin, J. R. Nimmo, L. Yang, W. Wang
2008, Journal of Hydrology (356) 209-222
Tritium and bromide were used as applied tracers to determine groundwater recharge in Hebei Plain, North China, to evaluate the impacts of different soil types, land use, irrigation, and crop cultivation practice on recharge. Additional objectives were to evaluate temporal variability of recharge and the effect on results of the...
Using amphibole phenocrysts to track vapor transfer during magma crystallization and transport: An example from Mount St. Helens, Washington
M.C. Rowe, A.J.R. Kent, C.R. Thornber
2008, Journal of Volcanology and Geothermal Research (178) 593-607
In order to evaluate and further constrain models for volatile movement and vapor enrichment of magma stored at shallow levels, amphibole phenocrysts from 2004–2005 Mount St. Helens dacite were analyzed for major and selected trace elements (Li, Cu, Zn, Mn, and REE) and Li isotopes. Several recent studies have examined...
The cause of China's devastation
S. Bahan, W. Mooney
2008, Earth (53) 44-47
[No abstract available]...
Resolving model parameter values from carbon and nitrogen stock measurements in a wide range of tropical mature forests using nonlinear inversion and regression trees
S. Liu, P. Anderson, G. Zhou, B. Kauffman, F. Hughes, D. Schimel, Vicente Watson, Joseph Tosi
2008, Ecological Modelling (219) 327-341
Objectively assessing the performance of a model and deriving model parameter values from observations are critical and challenging in landscape to regional modeling. In this paper, we applied a nonlinear inversion technique to calibrate the ecosystem model CENTURY against carbon (C) and nitrogen (N) stock measurements collected from 39 mature...
All their eggs in one basket: A rocky reef nursery for the longnose skate (Raja rhina Jordan & Gilbert, 1880) in the southern California Bight
M.S. Love, D.M. Schroeder, L. Snook, A. York, G. Cochrane
2008, Fishery Bulletin (106) 471-475
[No abstract available]...
Genetic structure along an elevational gradient in Hawaiian honeycreepers reveals contrasting evolutionary responses to avian malaria
Lori S. Eggert, L.A. Terwilliger, B.L. Woodworth, P.J. Hart, D. Palmer, R.C. Fleischer
2008, BMC Evolutionary Biology (8)
Background. The Hawaiian honeycreepers (Drepanidinae) are one of the best-known examples of an adaptive radiation, but their persistence today is threatened by the introduction of exotic pathogens and their vector, the mosquito Culex quinquefasciatus. Historically, species such as the amakihi (Hemignathus virens), the apapane (Himatione sanguinea), and the iiwi (Vestiaria...
Multiple plagioclase crystal populations identified by crystal size distribution and in situ chemical data: Implications for timescales of magma chamber processes associated with the 1915 eruption of Lassen Peak, CA
M.J. Salisbury, W.A. Bohrson, M.A. Clynne, F.C. Ramos, P. Hoskin
2008, Journal of Petrology (49) 1755-1780
Products of the 1915 Lassen Peak eruption reveal evidence for a magma recharge–magma mixing event that may have catalyzed the eruption and from which four compositional members were identified: light dacite, black dacite, andesitic inclusion, and dark andesite. Crystal size distribution, textural, and in situ chemical (major and trace element...
