Amphipod densities and indices of wetland quality across the upper-Midwest, USA
M.J. Anteau, A. D. Afton
2008, Wetlands (28) 184-196
Nutritional, behavioral, and diet data for lesser scaup (Aythya affinis [Eyton, 1838]) indicates that there has been a decrease in amphipod (Gammarus lacustris [G. O. Sars, 1863] and Hyalella azteca [Saussure, 1858]) density and wetland quality throughout the upper-Midwest, USA. Accordingly, we estimated densities of Gammarus and Hyalella in six...
Endocrine systems in juvenile anadromous and landlocked Atlantic salmon (Salmo salar): Seasonal development and seawater acclimation
Tom O. Nilsen, Lars O.E. Ebbesson, P. Kiilerich, B. Th Bjornsson, Steffen S. Madsen, S. D. McCormick, S.O. Stefansson
2008, General and Comparative Endocrinology (155) 762-772
The present study compares developmental changes in plasma levels of growth hormone (GH), insulin-like growth factor I (IGF-I) and cortisol, and mRNA levels of their receptors and the prolactin receptor (PRLR) in the gill of anadromous and landlocked Atlantic salmon during the spring parr-smolt transformation (smoltification) period and following four...
Fate and transport of pesticides in the ground water systems of southwest Georgia, 1993-2005
M.S. Dalton, E. A. Frick
2008, Conference Paper, Journal of Environmental Quality
Modern agricultural practices in the United States have resulted in nearly unrivaled efficiency and productivity. Unfortunately, there is also the potential for release of these compounds to the environment and consequent adverse affects on wildlife and human populations. Since 1993, the National Water-Quality Assessment (NAWQA) program of the U.S. Geological...
Thermal history of the unsaturated zone at Yucca Mountain, Nevada, USA
J. F. Whelan, L.A. Neymark, R.J. Moscati, B.D. Marshall, E. Roedder
2008, Applied Geochemistry (23) 1041-1075
Secondary calcite, silica and minor amounts of fluorite deposited in fractures and cavities record the chemistry, temperatures, and timing of past fluid movement in the unsaturated zone at Yucca Mountain, Nevada, the proposed site of a high-level radioactive waste repository. The distribution and geochemistry of these deposits are consistent with...
Revisiting classic water erosion models in drylands: The strong impact of biological soil crusts
M. A. Bowker, J. Belnap, Bala V. Chaudhary, N.C. Johnson
2008, Soil Biology and Biochemistry (40) 2309-2316
Soil erosion and subsequent degradation has been a contributor to societal collapse in the past and is one of the major expressions of desertification in arid regions. The revised universal soil loss equation (RUSLE) models soil lost to water erosion as a function of climate erosivity (the degree to which...
Mangrove forest distributions and dynamics (1975–2005) of the tsunami-affected region of Asia
S. Giri, Z. Zhu, L.L. Tieszen, A. Singh, S. Gillette, J.A. Kelmelis
2008, Journal of Biogeography (35) 519-528
Aim We aimed to estimate the present extent of tsunami-affected mangrove forests and determine the rates and causes of deforestation from 1975 to 2005.Location Our study region covers the tsunami-affected coastal areas of Indonesia, Malaysia, Thailand, Burma (Myanmar), Bangladesh, India and Sri Lanka in Asia.Methods We interpreted time-series Landsat data...
Effects of spatial resolution ratio in image fusion
Y. Ling, M. Ehlers, E.L. Usery, M. Madden
2008, International Journal of Remote Sensing (29) 2157-2167
In image fusion, the spatial resolution ratio can be defined as the ratio between the spatial resolution of the high-resolution panchromatic image and that of the low-resolution multispectral image. This paper attempts to assess the effects of the spatial resolution ratio of the input images on the quality of the...
Seismic hazard in the Istanbul metropolitan area: A preliminary re-evaluation
E. Kalkan, Polat Gulkan, N.Y. Ozturk, M. Çelebi
2008, Journal of Earthquake Engineering (12) 151-164
In 1999, two destructive earthquakes (M7.4 Kocaeli and M7.2 Duzce) occurred in the north west of Turkey and resulted in major stress-drops on the western segment of the North Anatolian Fault system where it continues under the Marmara Sea. These undersea fault segments were recently explored using bathymetric and reflection...
Deformation and stress-change modeling at Sierra Negra volcano, Galapagos, from ENVISAT INSAR and GPS observations
Sigurjon Jonsson, W.W. Chadwick, Michael Poland, D. Geist
2008, Conference Paper, European Space Agency, (Special Publication) ESA SP
We use radar interferograms and GPS observations to constrain models of magma accumulation and faulting at Sierra Negra volcano, Galápagos, during the years before its 2005 eruption. The data have shown ~5 m of pre-eruption uplift and multiple trapdoor faulting events on an intra-caldera fault system. We find the...
Diverse deformation patterns of Aleutian volcanoes from InSAR
Z. Lu, D. Dzurisin, C. Wicks Jr., J. Power
2008, Conference Paper, European Space Agency, (Special Publication) ESA SP
Interferometric synthetic aperture radar (InSAR) is capable of measuring ground-surface deformation with centimeter-to-subcentimeter precision at a spatial resolution of tens of meters over an area of hundreds to thousands of square kilometers. With its global coverage and all-weather imaging capability, InSAR has become an increasingly important measurement technique for constraining...
Mineralogical and compositional characteristics of Late Permian coals from an area of high lung cancer rate in Xuan Wei, Yunnan, China: Occurrence and origin of quartz and chamosite
S. Dai, L. Tian, C. L. Chou, Y. Zhou, M. Zhang, L. Zhao, Jingyuan Wang, Z. Yang, H. Cao, D. Ren
2008, International Journal of Coal Geology (76) 318-327
Some townships in Xuan Wei County, Yunnan Province, have one of the highest lung cancer mortality rates in China and the epidemic disease in the area has generally been attributed to the polycyclic aromatic hydrocarbons (PAHs) released from domestic coal burning. However, the cancer-causing culprit is not settled as Tian...
The Lower Triassic Sorkh Shale Formation of the Tabas Block, east central Iran: Succesion of a failed-rift basin at the Paleotethys margin
Y. Lasemi, M. Ghomashi, H. Amin-Rasouli, A. Kheradmand
2008, Carbonates and Evaporites (23) 21-38
The Lower Triassic Sorkh Shale Formation is a dominantly red colored marginal marine succession deposited in the north-south trending Tabas Basin of east central Iran. It is correlated with the unconformity-bounded lower limestone member of the Elika Formation of the Alborz Mountains of northern Iran. The Sorkh Shale is bounded...
100 Myr record of sequences, sedimentary facies and sea level change from Ocean Drilling Program onshore coreholes, US Mid-Atlantic coastal plain
J.V. Browning, K.G. Miller, P. J. Sugarman, M.A. Kominz, P.P. McLaughlin, A.A. Kulpecz, M.D. Feigenson
2008, Basin Research (20) 227-248
We analyzed the latest Early Cretaceous to Miocene sections (???110-7Ma) in 11 New Jersey and Delaware onshore coreholes (Ocean Drilling Program Legs 150X and 174AX). Fifteen to seventeen Late Cretaceous and 39-40 Cenozoic sequence boundaries were identified on the basis of physical and temporal breaks. Within-sequence changes follow predictable patterns...
Nitrogen immobilization by wood-chip application: Protecting water quality in a northern hardwood forest
P.M. Homyak, R.D. Yanai, Douglas A. Burns, R.D. Briggs, R.H. Germain
2008, Forest Ecology and Management (255) 2589-2601
Forest harvesting disrupts the nitrogen cycle, which may affect stream water quality by increasing nitrate concentrations, reducing pH and acid neutralizing capacity, and mobilizing aluminum and base cations. We tested the application of wood chips derived from logging slash to increase immobilization of N after harvesting, which should reduce nitrate...
Eruptive and noneruptive calderas, northeastern San Juan Mountains, Colorado: Where did the ignimbrites come from?
Peter W. Lipman, William C. McIntosh
2008, Geological Society of America Bulletin (120) 771-795
The northeastern San Juan Mountains, the least studied portion of this well-known segment of the Southern Rocky Mountains Volcanic Field are the site of several newly identified and reinterpreted ignimbrite calderas. These calderas document some unique eruptive features not described before from large volcanic systems elsewhere, as based on recent...
Hydrogeomorphic features mediate the effects of land use/cover on reservoir productivity and food webs
M.T. Bremigan, P.A. Soranno, M.J. Gonzalez, D.B. Bunnell, K.K. Arend, W. H. Renwick, R.A. Stein, M.J. Vanni
2008, Limnology and Oceanography (53) 1420-1433
Although effects of land use/cover on nutrient concentrations in aquatic systems are well known, half or more of the variation in nutrient concentration remains unexplained by land use/cover alone. Hydrogeomorphic (HGM) landscape features can explain much remaining variation and influence food web interactions. To explore complex linkages among land use/cover,...
Evaluation of a method for determining concentrations of isoeugenol, an AQUI-S residue, in fillet tissue from freshwater fish species.
J.R. Meinertz, Theresa M. Schreier, J.A. Bernardy
2008, Journal of AOAC International (91) 884-891
AQUI-S is a fish anesthetic/sedative that is approved for use in a number of countries throughout the world and has the potential for use in the United States. The active ingredient in AQUI-S is isoeugenol. A method for determining isoeugenol concentrations in edible fillet tissue is needed for regulatory purposes,...
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...
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...
Spatial interactions of yarded White-tailed Deer, Odocoileus virginianus
M.E. Nelson, G.A. Sargeant
2008, Canadian Field-Naturalist (122) 221-225
We examined the spatial interactions of nine female White-tailed Deer (Odocoileus virginianus) in two deeryards (winter aggregations) in northeastern Minnesota during February-April 1999. Global positioning system (GPS) collars yielded seven pair-wise comparisons of deer that were located at the same time (???1 minute apart) and mat used overlapping areas. Deer...
Mineralogy and geochemistry of boehmite-rich coals: New insights from the Haerwusu Surface Mine, Jungar Coalfield, Inner Mongolia, China
S. Dai, D. Li, C. L. Chou, L. Zhao, Y. Zhang, D. Ren, Y. Ma, Y. Sun
2008, International Journal of Coal Geology (74) 185-202
Boehmite-rich coal of Pennsylvanian age was discovered earlier at the Heidaigou Surface Mine, Jungar Coalfield, Inner Mongolia, China. This paper reports new results on 29 bench samples of the no. 6 coal from a drill core from the adjacent Haerwusu Surface Mine, and provides new insights into the origin of...
Igneous phenocrystic origin of K-feldspar megacrysts in granitic rocks from the Sierra Nevada batholith
J.G. Moore, T. W. Sisson
2008, Geosphere (4) 387-400
Study of four K-feldspar megacrystic granitic plutons and related dikes in the Sierra Nevada composite batholith indicates that the megacrysts are phenocrysts that grew in contact with granitic melt. Growth to megacrystic sizes was due to repeated replenishment of the magma bodies by fresh granitic melt that maintained temperatures above...
Removal of phosphorus from wastewater using ferroxysorb sorption media produced from amd sludge
P.L. Sibrell, T.W. Tucker, T. Kehler, J.W. Fletcher
2008, Conference Paper, Hydrometallurgy 2008: Proceedings of the 6th International Symposium
Treatment of acid mine drainage (AMD), whether with lime, limestone, caustic or simple aeration, nearly always results in generation of a metal hydroxide sludge. Disposal of the sludge often constitutes a significant fraction of the operating cost for the AMD treatment plant. Research at the USGS - Leetown Science Center...
Complex seasonal patterns of primary producers at the land-sea interface
J. E. Cloern, A.D. Jassby
2008, Ecology Letters (11) 1294-1303
Seasonal fluctuations of plant biomass and photosynthesis are key features of the Earth system because they drive variability of atmospheric CO2, water and nutrient cycling, and food supply to consumers. There is no inventory of phytoplankton seasonal cycles in nearshore coastal ecosystems where forcings from ocean,...
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...
