Infiltration from an impoundment for coal‐bed natural gas, Powder River Basin, Wyoming: Evolution of water and sediment chemistry
Richard W. Healy, Cynthia A. Rice, Timothy T. Bartos, Michael P. McKinley
2008, Water Resources Research (44)
Development of coal‐bed natural gas (CBNG) in the Powder River Basin, Wyoming, has increased substantially in recent years. Among environmental concerns associated with this development is the fate of groundwater removed with the gas. A preferred water‐management option is storage in surface impoundments. As of January 2007, permits for more...
Differential exposure, duration, and sensitivity of unionoidean bivalve life stages to environmental contaminants
W.G. Cope, R.B. Bringolf, D.B. Buchwalter, T.J. Newton, C.G. Ingersoll, N. Wang, T. Augspurger, F.J. Dwyer, M.C. Barnhart, R. J. Neves, E. Hammer
2008, Journal of the North American Benthological Society (27) 451-462
Freshwater mussels (superfamily Unionoidea) are in serious global decline and in urgent need of protection and conservation. The declines have been attributed to a wide array of human activities resulting in pollution and water-quality degradation, and habitat destruction and alteration. Linkages among poor water quality, pollutant sources, and mussel decline...
Low reservoir ages for the surface ocean from mid-Holocene Florida corals
E.R.M. Druffel, L.F. Robinson, S. Griffin, R. B. Halley, J. R. Southon, J.F. Adkins
2008, Paleoceanography (23)
The 14C reservoir age of the surface ocean was determined for two Holocene periods (4908-4955 and 3008-3066 calendar (cal) B.P.) using U/Th-dated corals from Biscayne National Park, Florida, United States. We found that the average reservoir ages for these two time periods (294 ?? 33 and 291 ?? 27 years,...
Method for estimating spatially variable seepage loss and hydraulic conductivity in intermittent and ephemeral streams
R.G. Niswonger, David E. Prudic, G.E. Fogg, David A. Stonestrom, E.M. Buckland
2008, Water Resources Research (44)
A method is presented for estimating seepage loss and streambed hydraulic conductivity along intermittent and ephemeral streams using streamflow front velocities in initially dry channels. The method uses the kinematic wave equation for routing streamflow in channels coupled to Philip's equation for infiltration. The coupled model considers variations in seepage...
Spatial and temporal variability in sedimentation rates associated with cutoff channel infill deposits: Ain River, France
H. Piégay, C.R. Hupp, A. Citterio, S. Dufour, B. Moulin, D.E. Walling
2008, Water Resources Research (44)
Floodplain development is associated with lateral accretion along stable channel geometry. Along shifting rivers, the floodplain sedimentation is more complex because of changes in channel position but also cutoff channel presence, which exhibit specific overflow patterns. In this contribution, the spatial and temporal variability of sedimentation rates in cutoff channel...
Size and age distributions of Juvenile Connecticut River American shad above Hadley Falls: Influence on outmigration representation and timing
M. J. O'Donnell, B. H. Letcher
2008, River Research and Applications (24) 929-940
Age- and size-based habitat use and movement patterns of young-of-year American shad in rivers are not well understood. Adult females reach their natal rivers at different times and ascend the river at different rates, which may lead to variation of hatch dates at a single location. Also, shad are serial...
Mangrove production and carbon sinks: A revision of global budget estimates
S. Bouillon, A.V. Borges, E. Castaneda-Moya, K. Diele, T. Dittmar, N.C. Duke, E. Kristensen, S.-Y. Lee, C. Marchand, J. J. Middelburg, V. H. Rivera-Monroy, T. J. Smith III, R.R. Twilley
2008, Global Biogeochemical Cycles (22)
Mangrove forests are highly productive but globally threatened coastal ecosystems, whose role in the carbon budget of the coastal zone has long been debated. Here we provide a comprehensive synthesis of the available data on carbon fluxes in mangrove ecosystems. A reassessment of global mangrove primary production from the literature...
Veneers, rinds, and fracture fills: Relatively late alteration of sedimentary rocks at Meridiani Planum, Mars
A.H. Knoll, B.L. Jolliff, W. H. Farrand, J.F. Bell III, B. C. Clark, Ralf Gellert, M.P. Golombek, J.P. Grotzinger, Kenneth E. Herkenhoff, J.R. Johson, S.M. McLennam, Robert Morris, S. W. Squyres, R. Sullivan, N.J. Tosca, A. Yen, Z. Learner
2008, Journal of Geophysical Research E: Planets (113)
Veneers and thicker rinds that coat outcrop surfaces and partially cemented fracture fills formed perpendicular to bedding document relatively late stage alteration of ancient sedimentary rocks at Meridiani Planum, Mars. The chemistry of submillimeter thick, buff-colored veneers reflects multiple processes at work since the establishment of the current plains surface....
MGS-TES thermal inertia study of the Arsia Mons Caldera
Glen E. Cushing, Timothy N. Titus
2008, Journal of Geophysical Research E: Planets (113)
Temperatures of the Arsia Mons caldera floor and two nearby control areas were obtained by the Mars Global Surveyor (MGS) Thermal Emission Spectrometer (TES). These observations revealed that the Arsia Mons caldera floor exhibits thermal behavior different from the surrounding Tharsis region when compared with thermal models. Our technique compares...
Deep drilling into the Chesapeake Bay impact structure
G. S. Gohn, C. Koeberl, K.G. Miller, W.U. Reimold, J.V. Browning, C.S. Cockell, J. Wright Horton Jr., T. Kenkmann, A.A. Kulpecz, D.S. Powars, W. E. Sanford, M.A. Voytek
2008, Science (320) 1740-1745
Samples from a 1.76-kilometer-deep corehole drilled near the center of the late Eocene Chesapeake Bay impact structure (Virginia, USA) reveal its geologic, hydrologic, and biologic history. We conducted stratigraphic and petrologic analyses of the cores to elucidate the timing and results of impact-melt creation and distribution, transient-cavity collapse, and ocean-water...
Evaluating transition-metal catalysis in gas generation from the Permian Kupferschiefer by hydrous pyrolysis
M. D. Lewan, M.J. Kotarba, D. Wieclaw, A. Piestrzynski
2008, Geochimica et Cosmochimica Acta (72) 4069-4093
Transition metals in source rocks have been advocated as catalysts in determining extent, composition, and timing of natural gas generation (Mango, F. D. (1996) Transition metal catalysis in the generation of natural gas. Org. Geochem.24, 977–984). This controversial hypothesis may have important implications concerning gas generation in unconventional shale-gas accumulations....
Molecular sequences derived from Paleocene Fort Union Formation coals vs. associated produced waters: Implications for CBM regeneration
Donald A. Klein, Romeo M. Flores, Christophe Venot, Kendra Gabbert, Raleigh Schmidt, Gary D. Stricker, Amy Pruden, Kevin Mandernack
2008, International Journal of Coal Geology (76) 3-13
Coalbed methane regeneration is of increasing interest, and is gaining global attention with respect to enhancement of gas recovery. The objective of this study is to determine if there are differences in methanogen nucleic acid sequences associated with low rank coals from the Powder River Basin, Wyoming, in comparison with...
Moist-soil seed abundance in managed wetlands in the Mississippi Alluvial Valley
J. Kross, R.M. Kaminski, K. J. Reinecke, E.J. Penny, A.T. Pearse
2008, Journal of Wildlife Management (72) 707-714
Managed moist-soil units support early succession herbaceous vegetation that produces seeds, tubers, and other plant parts used by waterfowl in the Mississippi Alluvial Valley (MAV), USA. We conducted a stratified multi-stage sample survey on state and federal lands in the MAV of Arkansas, Louisiana, Mississippi, and Missouri during autumns...
Quantifying the extent of river fragmentation by hydropower dams in the Sarapiquí River Basin, Costa Rica
Elizabeth P. Anderson, Catherine M. Pringle, Mary C. Freeman
2008, Aquatic Conservation: Marine and Freshwater Ecosystems (18) 408-417
Costa Rica has recently experienced a rapid proliferation of dams for hydropower on rivers draining its northern Caribbean slope. In the Sarapiquí River Basin, eight hydropower plants were built between 1990 and 1999 and more projects are either under construction or proposed. The majority of these dams are small (<15 m...
Potential effects of arboreal and terrestrial avian dispersers on seed dormancy, seed germination and seedling establishment in Ormosia (Papilionoideae) species in Peru
Mercedes S. Foster
2008, Journal of Tropical Ecology (24) 619-627
The relative effectiveness of arboreal or terrestrial birds at dispersing seeds of Ormosia macrocalyx and O. bopiensis (Fabaceae: Papilionoideae) were studied in south-eastern Peru. Seeds of both species were either scarified, to represent seed condition after dispersal by terrestrial birds, or left intact, to represent seed condition after dispersal...
Potential environmental contaminant risks to avian species at important bird areas in the northeastern United States
Barnett A. Rattner, B.K. Ackerson
2008, Integrated Environmental Assessment and Management (4) 344-357
Environmental contaminants can have profound effects on birds, acting from the molecular through population levels of biological organization. An analysis of potential contaminant threats was undertaken at 52 Important Bird Areas (IBAs) within the northeastern Atlantic coast drainage. Using geographic information system methodology, data layers describing or integrating...
Element patterns in feathers of nestling Black-Crowned Night-Herons, Nycticorax nycticorax L., from four colonies in Delaware, Maryland, and Minnesota
Thomas W. Custer, Nancy H. Golden, Barnett A. Rattner
2008, Bulletin of Environmental Contamination and Toxicology (81) 147-151
The pattern of elements in nestling black-crowned night-heron feathers from a rural Minnesota colony differed from colonies in industrialized regions of Maryland and Delaware. Except for chromium, however, the differences did not reflect the elements associated with waters and sediments of the Maryland and Delaware colonies. Therefore, elements...
Mercury and other element exposure to tree swallows (Tachycineta bicolor) nesting on Lostwood National Wildlife Refuge, North Dakota
T. W. Custer, Christine M. Custer, K. M. Johnson, D. J. Hoffman
2008, Environmental Pollution (155) 217-226
Elevated mercury concentrations in water were reported in the prairie wetlands at Lostwood National Wildlife Refuge, ND. In order to determine whether wildlife associated with these wetlands was exposed to and then accumulated higher mercury concentrations than wildlife living near more permanent wetlands (e.g. lakes), tree swallow (Tachycineta bicolor)...
Conserving waste rice for wintering waterfowl in the Mississippi Alluvial Valley
J.P. Kross, R.M. Kaminski, K. J. Reinecke, A.T. Pearse
2008, Journal of Wildlife Management (72) 1383-1387
Rice lost before or during harvest operations (hereafter waste rice) provides important food for waterfowl in the Mississippi Alluvial Valley, USA, but >70% of waste rice is lost during autumn. We conducted experiments in 19 production rice fields in Arkansas and Mississippi during autumns 2003 and 2004 to evaluate...
Monitoring in the context of structured decision-making and adaptive management
J. E. Lyons, M.C. Runge, H. P. Laskowski, W. L. Kendall
2008, Journal of Wildlife Management (72) 1683-1692
In a natural resource management setting, monitoring is a crucial component of an informed process for making decisions, and monitoring design should be driven by the decision context and associated uncertainties. Monitoring itself can play >3 roles. First, it is important for state-dependent decision-making, as when managers need...
A double-observer method to estimate detection rate during aerial waterfowl surveys
M.D. Koneff, J. Andrew Royle, M.C. Otto, J.S. Wortham, J.K. Bidwell
2008, Journal of Wildlife Management (72) 1641-649
We evaluated double-observer methods for aerial surveys as a means to adjust counts of waterfowl for incomplete detection. We conducted our study in eastern Canada and the northeast United States utilizing 3 aerial-survey crews flying 3 different types of fixed-wing aircraft. We reconciled counts of front- and rear-seat...
Temporal variation in adult survival rates of Roseate Terns during periods of increasing and declining populations
J. A. Spendelow, J.E. Hines, J.D. Nichols, I.C.T. Nisbet, G. Cormons, H. Hays, J.J. Hatch, C.S. Mostello
2008, Waterbirds (31) 309-319
We used 19 years of mark-recapture/resighting data collected on 11, 020 birds from 1988-2006 at five colony sites in Massachusetts, New York, and Connecticut, USA, to examine temporal variation in the survival rates of adult Roseate Terns (Sterna dougallii) during periods of overall population increase (1988-2000) and decline (2000-2006)....
Effects of human activity of breeding American Oystercatchers, Cumberland Island National Seashore, Georgia, USA
J. B. Sabine, J.M. Meyers, C. T. Moore, Sara H. Schweitzer
2008, Waterbirds (31) 70-82
Abstract.-Increased human use of coastal areas threatens the United States population of American Oystercatchers (Haematopus palliatus), a species of special concern. Biologists often attribute its low numbers and reproductive success to human disturbance, but the mechanism by which human presence reduces reproductive success is not well understood. During...
Annual recapture and survival rates of two non-breeding adult populations of Roseate Terns Stema dougallii captured on the Great Barrier Reef, Australia, and estimates of their population sizes
P. O’Neill, C.D.T. Minton, I.C.T. Nisbet, J.E. Hines
2008, Waterbirds (31) 338-345
Capture-recapture data from two disparate breeding populations of Roseate Terns (Sterna dougallii) captured together as non-breeding individuals from 2002 to 2007 in the southern Great Barrier Reef. Australia were analyzed for both survival rate and recapture rate. The average annual survival rate for the birds from the Asian...
Stream fish occurrence in response to impervious cover, historic land use, and hydrogeomorphic factors
Seth J. Wenger, James T. Peterson, Mary C. Freeman, Byron J. Freeman, D. David Homans
2008, Canadian Journal of Fisheries and Aquatic Sciences (65) 1250-1264
We evaluated competing models explaining the occurrence of five stream fishes in an urbanizing watershed to determine the relative importance of (a) impervious surface and other indicators of current land use, (b) historic land use (e.g., agriculture, impoundments), and (c) hydrogeomorphic characteristics (e.g., stream size, elevation, geology). For four of...
