A new reserve growth model for United States oil and gas fields
M.K. Verma
2005, Natural Resources Research (14) 77-89
Reserve (or field) growth, which is an appreciation of total ultimate reserves through time, is a well-recognized phenomenon, particularly in mature petroleum provinces. The importance of forecasting reserve growth accurately in a mature petroleum province made it necessary to develop improved growth functions, and a critical review of the original...
Biogeochemical and metabolic responses to the flood pulse in a semiarid floodplain
H. M. Valett, M. A. Baker, J. A. Morrice, C. S. Crawford, M. C. Molles Jr., Clifford N. Dahm, D. L. Moyer, J. R. Thibault, L. M. Ellis
2005, Ecology (86) 220-234
Flood pulse inundation of riparian forests alters rates of nutrient retention and organic matter processing in the aquatic ecosystems formed in the forest interior. Along the Middle Rio Grande (New Mexico, USA), impoundment and levee construction have created riparian forests that differ in their inter-flood intervals (IFIs) because some floodplains...
Mineral resources and consumption in the twenty-first century
W. David Menzie, Donald A. Singer, DeYoung Jr.
R.D. Simpson, M.A. Toman, R.U. Ayres, editor(s)
2005, Book chapter, Scarcity and growth revisited: natural resources and the environment in the new millennium
Modern societies are highly dependent upon energy and mineral resources to produce and deliver the material goods and even the services of everyday life. Although societies' dependence upon fossil fuels is evident and understood by much of the population, few people are as well informed about their dependence upon a...
Microclimate and nest-site selection in Micronesian Kingfishers
Dylan C. Kesler, Susan M. Haig
2005, Pacific Science (59) 499-508
We studied the relationship between microclimate and nest-site selection in the Pohnpei Micronesian Kingfisher (Todiramphus cinnamominus reichenbachii) which excavates nest cavities from the mudlike nest structures of arboreal termites (Nasutitermes sp.) or termitaria. Mean daily high temperatures at termitaria were cooler and daily low temperatures were warmer than at random...
Aqueous exposure to Aroclor 1254 modulates the mitogenic response of Atlantic salmon anterior kidney T-cells: Indications of short- and long-term immunomodulation
L. R. Iwanowicz, D.T. Lerner, V. S. Blazer, S. D. McCormick
2005, Aquatic Toxicology (72) 305-314
Polychlorinated biphenyls (PCBs) exist as persistent organic pollutants in numerous river systems in the United States. Unfortunately, some of these rivers are sites of active Atlantic salmon restoration programs, and polychlorinated biphenyls have been implicated as ancillary factors contributing to failed salmon restoration. Here, we investigate the immediate and chronic...
A space‐for‐time substitution reveals the long‐term decline in genotypic diversity of a widespread salt marsh plant, Spartina alterniflora, over a span of 1500 years
S.E. Travis, M.W. Hester
2005, Journal of Ecology (93) 417-430
Clonal populations face a trade‐off between sexual recruitment and vegetative growth and, once established, may undergo continuous declines in genotypic diversity if their sexual recruits make poor competitors. The geological history of delta formation in the Lower Mississippi River Valley was used to age eight S. alterniflora marshes for use in a...
Planning for bird conservation: a tale of two models
Douglas H. Johnson, Maiken Winter
2005, General Technical Report GTR-PSW-191
Planning for bird conservation has become increasingly reliant on remote sensing, geographical information systems, and, especially, models used to predict the occurrence of bird species as well as their density and demographics. We address the role of such tools by contrasting two models used in bird conservation. One, the Mallard...
Alunite in the Pascua-Lama high-sulfidation deposit: Constraints on alteration and ore deposition using stable isotope geochemistry
C. L. Deyell, R. Leonardson, R. O. Rye, J. F. H. Thompson, T. Bissig, D. R. Cooke
2005, Economic Geology (100) 131-148
The Pascua-Lama high-sulfidation system, located in the El Indio-Pascua belt of Chile and Argentina, contains over 16 million ounces (Moz) Au and 585 Moz Ag. The deposit is hosted primarily in granite rocks of Triassic age with mineralization occurring in several discrete Miocene-age phreatomagmatic breccias and related fracture networks. The...
Diel behavior of iron and other heavy metals in a mountain stream with acidic to neutral pH: Fisher Creek, Montana, USA
C.H. Gammons, D. A. Nimick, S.R. Parker, T.E. Cleasby, R. Blaine McCleskey
2005, Geochimica et Cosmochimica Acta (69) 2505-2516
Three simultaneous 24-h samplings at three sites over a downstream pH gradient were conducted to examine diel fluctuations in heavy metal concentrations in Fisher Creek, a small mountain stream draining abandoned mine lands in Montana. Average pH values at the upstream (F1), middle (F2),...
Host diversity begets parasite diversity: Bird final hosts and trematodes in snail intermediate hosts
Ryan F. Hechinger, Kevin D. Lafferty
2005, Proceedings of the Royal Society B: Biological Sciences (272) 1059-1066
An unappreciated facet of biodiversity is that rich communities and high abundance may foster parasitism. For parasites that sequentially use different host species throughout complex life cycles, parasite diversity and abundance in ‘downstream’ hosts should logically increase with the diversity and abundance of ‘upstream’ hosts (which carry the preceding stages...
Sensitivity analysis of conservative and reactive stream transient storage models applied to field data from multiple-reach experiments
M.N. Gooseff, K.E. Bencala, D.T. Scott, R.L. Runkel, Diane M. McKnight
2005, Advances in Water Resources (28) 479-492
The transient storage model (TSM) has been widely used in studies of stream solute transport and fate, with an increasing emphasis on reactive solute transport. In this study we perform sensitivity analyses of a conservative TSM and two different reactive solute transport models...
Colorado Late Cenozoic Fault and Fold Database and Internet Map Server: User-friendly technology for complex information
K.S. Morgan, G.J. Pattyn, M.L. Morgan
2005, Environmental & Engineering Geoscience (11) 155-162
Internet mapping applications for geologic data allow simultaneous data delivery and collection, enabling quick data modification while efficiently supplying the end user with information. Utilizing Web-based technologies, the Colorado Geological Survey's Colorado Late Cenozoic Fault and Fold Database was transformed from a monothematic, nonspatial Microsoft Access database into a complex...
North American Brant: Effects of changes in habitat and climate on population dynamics
David H. Ward, Austin Reed, James S. Sedinger, Jeffrey M. Black, Dirk V. Derksen, Paul M. Castelli
2005, Global Change Biology (11) 869-880
We describe the importance of key habitats used by four nesting populations of nearctic brant (Branta bernicla) and discuss the potential relationship between changes in these habitats and population dynamics of brant. Nearctic brant, in contrast to most geese, rely on marine habitats and native intertidal plants during the non-breeding...
Habitat associations of age-0 cutthroat trout in a spring stream improved for adult salmonids
Wayne A. Hubert, M. P. Joyce
2005, Journal of Freshwater Ecology (20) 277-286
Native cutthroat trout (Oncorhynchus clarki) in the Snake River watershed use streams formed by large springs for spawning and nursery habitat. Several spring streams have been modified to enhance abundance of adult salmonids, but the habitat associations of age-0 cutthroat trout in these systems are undescribed. We assessed the frequency...
Participant observations on environmental and social effects of the Conservation Reserve Program: Results of a national survey
A.W. Allen
2005, Technical Review 05-2
No abstract available....
Klamath basin called "critical" for pintail that depart Grasslands
M. R. Miller, J. P. Fleskes
2005, Grassland Today (15) 3
No abstract available at this time...
Changes in mass and nutrient content of wood during decomposition in a south Florida mangrove forest
L.M. Romero, T. J. Smith III, J.W. Fourqurean
2005, Journal of Ecology (93) 618-631
1 Large pools of dead wood in mangrove forests following disturbances such as hurricanes may influence nutrient fluxes. We hypothesized that decomposition of wood of mangroves from Florida, USA (Avicennia germinans, Laguncularia racemosa and Rhizophora mangle), and the consequent nutrient dynamics, would depend on species, location in the forest relative...
Hydrogen and oxygen isotope constraints on hydrothermal alteration of the Trinity peridotite, Klamath Mountains, California
V. Liakhovitch, James E. Quick, R. T. Gregory
2005, International Geology Review (47) 203-214
The Trinity peridotite represents a rare opportunity to examine a relatively fertile plagioclase peridotite that was exhumed and later subjected to intrusive events in a seafloor environment, followed by its emplacement and incorporation into a continent. Over 250 stable isotopic determinations on whole rocks and minerals elucidate the hydrothermal evolution...
Exposing extinction risk analysis to pathogens: Is disease just another form of density dependence?
Leah R. Gerber, Hamish McCallum, Kevin D. Lafferty, John L. Sabo, Andy Dobson
2005, Ecological Applications (15) 1402-1414
In the United States and several other countries, the development of population viability analyses (PVA) is a legal requirement of any species survival plan developed for threatened and endangered species. Despite the importance of pathogens in natural populations, little attention has been given to host-pathogen dynamics in PVA. To study...
El Niño and displays of spring-flowering annuals in the Mojave and Sonoran deserts
Janice E. Bowers
2005, Journal of the Torrey Botanical Society (132) 38-49
Although popular and scientific literature frequently assumes a strong connection between El Niño-Southern Oscillation (ENSO) and good displays of spring-flowering annuals in the southwestern United States, such assumptions are based on anecdotal, short-term evidence. The goals of this study were to identify good wildflower years as objectively as possible, to...
Development of ground-motion prediction equations relevant to shallow-mining-induced seismicity in the Trial Mountain area, Emery County, Utah
Art McGarr, Joe B. Fletcher
2005, Bulletin of the Seismological Society of America (95) 31-47
To provide a basis for assessing the seismic hazard to the Joes Valley Dam due to future coal mining in the nearby Cottonwood Tract, central Utah, we developed ground-motion prediction relations using data recorded by a seismic network, established and operated by the University of Utah Seismograph Stations. The network...
Optimal swim speeds for traversing velocity barriers: An analysis of volitional high-speed swimming behavior of migratory fishes
T. Castro-Santos
2005, Journal of Experimental Biology (208) 421-432
Migrating fish traversing velocity barriers are often forced to swim at speeds greater than their maximum sustained speed (Ums). Failure to select an appropriate swim speed under these conditions can prevent fish from successfully negotiating otherwise passable barriers. I propose a new model of a distance-maximizing strategy for fishes traversing...
Characterizing the spatial structure of endangered species habitat using geostatistical analysis of IKONOS imagery
C.S.A. Wallace, S.E. Marsh
2005, International Journal of Remote Sensing (26) 2607-2629
Our study used geostatistics to extract measures that characterize the spatial structure of vegetated landscapes from satellite imagery for mapping endangered Sonoran pronghorn habitat. Fine spatial resolution IKONOS data provided information at the scale of individual trees or shrubs that permitted analysis of vegetation structure and pattern. We derived images...
Simulating the evolution of coastal morphology and stratigraphy with a new morphological-behaviour model (GEOMBEST)
D. Stolper, J. H. List, E.R. Thieler
2005, Marine Geology (218) 17-36
A new morphological-behaviour model is used to simulate evolution of coastal morphology associated with cross-shore translations of the shoreface, barrier, and estuary. The model encapsulates qualitative principles drawn from established geological concepts that are parameterized to provide quantitative predictions of morphological change on geological time scales (order 10 3 years),...
Optical properties of pseudovitrinite; implications for its origin
Maria Mastalerz, A. Drobniak
2005, International Journal of Coal Geology (62) 250-258
A set of Pennsylvanian coals from the North American coal basins, ranging in vitrinite reflectance from 0.65% to 1.75%, was examined, with special emphasis on the optical properties of pseudovitrinite. The results suggest that pseudovitrinite originates from the same material as telocollinite. Slits in the pseudovitrinite seem to have originated...
