Modern foraminiferal facies in a subtropical estuarine channel, Bertioga, São Paulo, Brazil
P.P.B. Eichler, B.B. Eichler, L. B. De Miranda, A.R. Rodrigues
2007, Journal of Foraminiferal Research (37) 234-247
Numerical analyses of modern foraminiferal abundance and environmental data from the Bertioga Channel (Sa??o Paulo, Brazil) reveal multiple biofacies within an overall paralic setting. Despite its fisheries, mariculture and attraction to tourists, the environmental state of Bertioga Channel remains poorly studied. The present investigation is an attempt to partly fill...
Pyroclastic activity at home plate in Gusev crater, Mars
S. W. Squyres, O. Aharonson, B. C. Clark, B. A. Cohen, L. Crumpler, P.A. de Souza, W. H. Farrand, Ralf Gellert, J. Grant, J.P. Grotzinger, A. F. C. Haldemann, J. R. Johnson, G. Klingelhofer, K.W. Lewis, R. Li, T. McCoy, A. S. McEwen, H.Y. McSween, D. W. Ming, Johnnie N. Moore, R.V. Morris, T. J. Parker, J. W. Rice Jr., S. Ruff, M. Schmidt, C. Schroder, L.A. Soderblom, A. Yen
2007, Science (316) 738-742
Home Plate is a layered plateau in Gusev crater on Mars. It is composed of clastic rocks of moderately altered alkali basalt composition, enriched in some highly volatile elements. A coarse-grained lower unit lies under a finer-grained upper unit. Textural observations indicate that the lower strata were emplaced in an...
Tracking environmental dynamics and agricultural intensification in southern Mali
G. Gray Tappan, M. McGahuey
2007, Agricultural Systems (94) 38-51
The Office de la Haute Vallée du Fleuve Niger (OHVN) zone in southern Mali is a small but important agricultural production region. Against a background of environmental degradation including decades of declining rainfall, soil erosion, and human pressure on forest resources, numerous farming communities stand out through the use of...
Sea otters in a dirty ocean
David A. Jessup, Melissa A. Miller, Christine Kreuder Johnson, Patricia A. Conrad, M. Tim Tinker, James A. Estes, Jonna A.K. Mazet
2007, Journal of the American Veterinary Medical Association (231) 1648-1652
No abstract available....
Functional groups in a single pteridosperm species: Variability and circumscription (Pennsylvanian, Nova Scotia, Canada)
E.L. Zodrow, Maria Mastalerz
2007, International Journal of Coal Geology (70) 313-324
Multiple foliar specimens of the Late Pennsylvanian fossil pteridosperm [gymnosperm] Alethopteris zeilleri (Ragot) Wagner were collected from one restricted stratigraphical horizon in the Canadian Sydney Coalfield. Variability of functional-group distribution using FTIR technique was studied in compressions, adaxial versus abaxial cuticles, and in unseparated cuticles as a function of maceration...
Applying radar technology to migratory bird conservation and management: Strengthening and expanding a collaborative
Janet M. Ruth, Albert Manville, Ron Larkin, Wylie C. Barrow, Lori Johnson-Randall, Deanna K. Dawson, Robert H. Diehl, Yufang Wang, Richard S. Sojda, Rafal Angryk, Robert W. Klaver, Reggie Mead, John Paxton, Patricia J. Heglund, Eileen Kirsch, Manuel J. Suarez, Larry Robinson, Sidney A. Gauthreaux Jr., Carroll G. Belser, Steven J. Franke, Bruno Bruderer, Jeffrey J. Buler, Frank R. Moore, David S. Mizrahi, Robert Fogg, T. Adam Kelly, Paul M. Cryan, Tim Crum, Terry J. Schuur, Dave Krueper, Robb Diehl, Tom Will
Janet M. Ruth, editor(s)
2007, Open-File Report 2007-1361
Executive Summary Understanding the factors affecting migratory bird and bat populations during all three phases of their life cycle—breeding, nonbreeding, and migration—is critical to species conservation planning. This includes the need for information about these species’ responses to natural challenges, as well as information about the effects of human activities and...
Probabilistic prediction models for aggregate quarry siting
G.R. Robinson Jr., P.M. Larkins
2007, Natural Resources Research (16) 135-146
Weights-of-evidence (WofE) and logistic regression techniques were used in a GIS framework to predict the spatial likelihood (prospectivity) of crushed-stone aggregate quarry development. The joint conditional probability models, based on geology, transportation network, and population density variables, were defined using quarry location and time of development data for the New...
Recovery of three arctic stream reaches from experimental nutrient enrichment
J.P. Benstead, A.C. Green, Linda A. Deegan, B. J. Peterson, K. Slavik, W.B. Bowden, A.E. Hershey
2007, Freshwater Biology (52) 1077-1089
1. Nutrient enrichment and resulting eutrophication is a widespread anthropogenic influence on freshwater ecosystems, but recovery from nutrient enrichment is poorly understood, especially in stream environments. We examined multi-year patterns in community recovery from experimental low-concentration nutrient enrichment (N + P or P only) in three reaches of two Arctic...
Multiple-species analysis of point count data: A more parsimonious modelling framework
M.W. Alldredge, K. H. Pollock, T.R. Simons, S.A. Shriner
2007, Journal of Applied Ecology (44) 281-290
1. Although population surveys often provide information on multiple species, these data are rarely analysed within a multiple-species framework despite the potential for more efficient estimation of population parameters. 2. We have developed a multiple-species modelling framework that uses similarities in capture/detection processes among species to model multiple species data...
Prime candidate earth targets for the post-launch radiometric calibration of space-based optical imaging instruments
P.M. Teillet, J. A. Barsi, G. Chander, K. J. Thome
2007, Conference Paper, Proceedings of SPIE - The International Society for Optical Engineering
This paper provides a comprehensive list of prime candidate terrestrial targets for consideration as benchmark sites for the post-launch radiometric calibration of space-based instruments. The key characteristics of suitable sites are outlined primarily with respect to selection criteria, spatial uniformity, and temporal stability. The establishment and utilization of such benchmark...
Pressure calibrants in the hydrothermal diamond-anvil cell
I.-M. Chou
2007, International Geology Review (49) 289-300
Based on the equation of state of water (EOSW), experimental pressure in the hydrothermal diamond-anvil cell (HDAC) using pure water or dilute aqueous solutions as a pressure medium can be accurately determined at each measured temperature. Consequently, meaningful interpretations can be obtained for observations in the HDAC, which has been...
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,...
Patterns and trends in sediment toxicity in the San Francisco Estuary
B. Anderson, J. Hunt, B. Phillips, B. Thompson, S. Lowe, K. Taberski, Carr R. Scott
2007, Environmental Research (105) 145-155
Widespread sediment toxicity has been documented throughout the San Francisco Estuary since the mid-1980s. Studies conducted in the early 1990s as part of the Bay Protection and Toxic Cleanup Program (BPTCP), and more recently as part of the Regional Monitoring Program (RMP) have continued to find sediment toxicity in the...
Progressive oxidation of pyrite in five bituminous coal samples: An As XANES and 57Fe Mössbauer spectroscopic study
Allan Kolker, Frank E. Huggins
2007, Applied Geochemistry (22) 778-787
Naturally occurring pyrite commonly contains minor substituted metals and metalloids (As, Se, Hg, Cu, Ni, etc.) that can be released to the environment as a result of its weathering. Arsenic, often the most abundant minor constituent in pyrite, is a sensitive monitor of progressive pyrite oxidation in coal. To test...
Migration of bats past a remote island offers clues toward the problem of bat fatalities at wind turbines
P.M. Cryan, A.C. Brown
2007, Biological Conservation (139) 1-11
Wind energy is rapidly becoming a viable source of alternative energy, but wind turbines are killing bats in many areas of North America. Most of the bats killed by turbines thus far have been migratory species that roost in trees throughout the year, and the highest fatality events appear to...
Erosion and landscape development decouple strontium and sulfur in the transition to dominance by atmospheric inputs
C.R. Bern, S. Porder, A.R. Townsend
2007, Geoderma (142) 274-284
Weathering and leaching can progressively deplete the pools of soluble, rock-derived elements in soils and ecosystems over millennial time-scales, such that productivity increasingly relies on inputs from atmospheric deposition. This transition has been explored using strontium isotopes, which have been widely assumed to be a proxy for the provenance of...
Forest legacies, climate change, altered disturbance regimes, invasive species and water
T. Stohlgren, C. Jarnevich, S. Kumar
2007, Unasylva (58) 44-49
The factors that must be considered in seeking to predict changes in water availability has been examined. These factors are the following: forest legacies including logging, mining, agriculture, grazing, elimination of large carnivores, human-caused wildfire, and pollution; climate change and stream flow; altered disturbances such as frequency intensity and pattern...
New insights into the history and origin of the southern Maya block, SE Mexico: U-Pb-SHRIMP zircon geochronology from metamorphic rocks of the Chiapas massif
Bodo Weber, Alexander Iriondo, Wayne R. Premo, Lutz Hecht, Peter Schaaf
2007, International Journal of Earth Sciences (96) 253-269
The histories of the pre-Mesozoic landmasses in southern México and their connections with Laurentia, Gondwana, and among themselves are crucial for the understanding of the Late Paleozoic assembly of Pangea. The Permian igneous and metamorphic rocks from the Chiapas massif as part of the southern Maya block, México,...
Reconstructing late Cenozoic stream gradients from high-level chert gravels in central Eastern Kansas
J.W. Harbaugh, D. F. Merriam, H.H. Howard
2007, Current Research in Earth Sciences (253)
Interpreting the evolution of Kansas' landscape east of the Flint Hills provides major challenges. In the Neogene (late Tertiary) and perhaps part of the Pleistocene, streams transported a variety of sedimentary materials, including chert gravels derived from the Flint Hills. Gentle intermittent uplift stimulated the system system to cut down,...
Defining space use and movements of Canada lynx with global positioning system telemetry
C.L. Burdett, R.A. Moen, G.J. Niemi, L.D. Mech
2007, Journal of Mammalogy (88) 457-467
Space use and movements of Canada lynx (Lynx canadensis) are difficult to study with very-high-frequency radiocollars. We deployed global positioning system (GPS) collars on 11 lynx in Minnesota to study their seasonal space-use patterns. We estimated home ranges with minimum-convex-polygon and fixed-kernel methods and estimated core areas with area/probability curves....
Organic petrology and coalbed gas content, Wilcox Group (Paleocene-Eocene), northern Louisiana
Paul C. Hackley, Peter D. Warwick, F. Clayton Breland Jr.
2007, International Journal of Coal Geology (71) 54-71
Wilcox Group (Paleocene–Eocene) coal and carbonaceous shale samples collected from four coalbed methane test wells in northern Louisiana were characterized through an integrated analytical program. Organic petrographic analyses, gas desorption and adsorption isotherm measurements, and proximate–ultimate analyses were conducted to provide insight into conditions of peat deposition and the relationships...
Ammonia causes decreased brain monoamines in fathead minnows (Pimephales promelas)
Patrick J. Ronan, Mark P. Gaikowski, Steven J. Hamilton, Kevin J. Buhl, Cliff H. Summers
2007, Brain Research (1147) 184-191
Hyperammonemia, arising from variety of disorders, leads to severe neurological dysfunction. The mechanisms of ammonia toxicity in brain are not completely understood. This study investigated the effects of ammonia on monoaminergic systems in brains of fathead minnows (Pimephales promelas). Fish serve as a good model system to investigate hyperammonemic effects...
Close temporal correspondence between geomagnetic anomalies and earthquakes during the 2002-2003 eruption of Etna volcano
G. Currenti, Negro C. Del, M. Johnston, Y. Sasai
2007, Journal of Geophysical Research B: Solid Earth (112)
The early stages of the 2002-2003 lateral eruption at Mount Etna were accompanied by slow changes (over some hours) and some rapid step offsets in the local magnetic field. At five monitoring locations, the total magnetic field intensity has been measured using continuously operating Overhauser magnetometers at a sampling rate...
Using SHRIMP zircon dating to unravel tectonothermal events in arc environments. The early Palaeozoic arc of NW Iberia revisited
J. Abati, P.G. Castineiras, R. Arenas, J. Fernandez-Suarez, J.G. Barreiro, J. L. Wooden
2007, Terra Nova (19) 432-439
Dating of zircon cores and rims from granulites developed in a shear zone provides insights into the complex relationship between magmatism and metamorphism in the deep roots of arc environments. The granulites belong to the uppermost allochthonous terrane of the NW Iberian Massif, which forms part of a Cambro-Ordovician magmatic...
Groundwater flow with energy transport and water-ice phase change: Numerical simulations, benchmarks, and application to freezing in peat bogs
J.M. McKenzie, Clifford I. Voss, D. I. Siegel
2007, Advances in Water Resources (30) 966-983
In northern peatlands, subsurface ice formation is an important process that can control heat transport, groundwater flow, and biological activity. Temperature was measured over one and a half years in a vertical profile in the Red Lake Bog, Minnesota. To successfully simulate the transport of heat within the peat profile,...
