U-Pb SHRIMP geochronology and trace-element geochemistry of coesite-bearing zircons, North-East Greenland Caledonides
W.C. McClelland, S.E. Power, J. A. Gilotti, F.K. Mazdab, B. Wopenka
2006, Special Paper of the Geological Society of America 23-43
Obtaining reliable estimates for the timing of eclogite-facies metamorphism is critical to establishing models for the formation and exhumation of high-pressure and ultrahigh-pressure (UHP) metamorphic terranes in collisional orogens. The presence of pressure-dependent phases, such as coesite, included in metamorphic zircon is generally regarded as evidence that zircon growth occurred...
Long-term dynamics of production, respiration, and net CO2 exchange in two sagebrush-steppe ecosystems
T.G. Gilmanov, T.J. Svejcar, D.A. Johnson, R.F. Angell, Nicanor Z. Saliendra, B.K. Wylie
2006, Rangeland Ecology and Management (59) 585-599
We present a synthesis of long-term measurements of CO2 exchange in 2 US Intermountain West sagebrush-steppe ecosystems. The locations near Burns, Oregon (1995–2001), and Dubois, Idaho (1996–2001), are part of the AgriFlux Network of the Agricultural Research Service, United States Department of Agriculture. Measurements of net ecosystem CO2 exchange (Fc)...
Methods Used to Assess the Susceptibility to Contamination of Transient, Non-Community Public Ground-Water Supplies in Indiana
Leslie D. Arihood, David A. Cohen
2006, Scientific Investigations Report 2005-5059
The Safe Water Drinking Act of 1974 as amended in 1996 gave each State the responsibility of developing a Source-Water Assessment Plan (SWAP) that is designed to protect public-water supplies from contamination. Each SWAP must include three elements: (1) a delineation of the source-water protection area, (2) an inventory of...
Project PROBE Leg I - Report and archive of multibeam bathymetry and acoustic backscatter , CTD/XBT and GPS navigation data collected during USGS Cruise 02051 (NOAA Cruise RB0208) Puerto Rico Trench September 24, 2002 to September 30, 2002
Uri S. ten Brink, Charles R. Worley, Shep Smith, Thomas Stepka, Glynn F. Williams
2006, Open-File Report 2005-1066
On September 24-30, 2002, six days of scientific surveying to map a section of the Puerto Rico Trench (PRT) took place aboard the National Oceanic and Atmospheric Administration (NOAA) ship Ron Brown. The cruise was funded by NOAA's Office of Ocean Exploration. Multibeam bathymetry and acoustic-backscatter data were collected over...
Coastal-change and glaciological map of the Trinity Peninsula area and south Shetland Islands, Antarctica: 1843-2001: Chapter A in Coastal-change and glaciological maps of Antarctica
Jane G. Ferrigno, Alison J. Cook, Kevin M. Foley, Richard S. Williams Jr., Charles Swithinbank, Adrian J. Fox, Janet W. Thomson, Jorn Sievers
2006, IMAP 2600-A
Changes in the area and volume of polar ice sheets are intricately linked to changes in global climate, and the resulting changes in sea level could severely impact the densely populated coastal regions on Earth. Melting of the West Antarctic part alone of the Antarctic ice sheet would cause a...
An assessment of volcanic threat and monitoring capabilities in the United States: Framework for a National Volcano Early Warning System
John W. Ewert, Marianne Guffanti, Thomas L. Murray
2005, Open-File Report 2005-1164
Executive SummaryNVEWS – a National Volcano Early Warning System – is being formulated by the Consortium of U.S. Volcano Observatories (CUSVO) to establish a proactive, fully integrated, national-scale monitoring effort that ensures the most threatening volcanoes in the United States are properly monitored in advance of the onset of unrest...
Variations in pesticide tolerance: Chapter 16
Christine M. Bridges, Raymond D. Semlitsch
Michael Lannoo, editor(s)
2005, Book chapter, Amphibian declines: The conservation status of United States species
A growing body of evidence suggests that a number of amphibian populations have declined in recent years. The cause of these population declines has been difficult to establish because in some instances only a single species is declining while sympatric species are thriving. This chapter discusses the results of...
Preliminary results from a shallow water benthic grazing study
N.L. Jones, Stephen G. Monismith, Janet K. Thompson
2005, Interagency Ecological Program Newsletter (18) 7-13
The nutrient-rich, shallow waters of San Francisco Bay support high rates of primary production, limited not by nutrients but by light availability and benthic grazing (Alpine and others 1992; Cloern 1982). Phytoplankton blooms are an important food source for upper trophic levels. Consequently animal populations, such as fish, may suffer...
Late Quaternary history of the Atacama Desert
Claudio Latorre, Julio L. Betancourt, Jason A. Rech, Jay Quade, Camille Holmgren, Christa Placzek, Antonio Maldonado, Mathias Vuille, Kate A. Rylander
Mike Smith, Paul Hesse, editor(s)
2005, Book chapter, 23° S: Archaeology and Environmental History of the Southern Deserts
Of the major subtropical deserts found in the Southern Hemisphere, the Atacama Desert is the driest. Throughout the Quaternary, the most pervasive climatic influence on the desert has been millennial-scale changes in the frequency and seasonality of the scant rainfall, and associated shifts in plant and animal distributions with elevation...
Assessing climate change effects on mountain ecosystems using integrated models: A case study
Daniel B. Fagre, Steven W. Running, Robert E. Keane, David L. Peterson
2005, Book chapter, Global change and mountain regions: An overview of current knowledge
Mountain systems are characterized by strong environmental gradients, rugged topography and extreme spatial heterogeneity in ecosystem structure and composition. Consequently, most mountainous areas have relatively high rates of endemism and biodiversity, and function as species refugia in many areas of the world. Mountains have long been recognized as critical entities...
An evaluation of effects of groundwater exchange on nearshore habitats and water quality of western Lake Erie
Sheridan K. Haack, Brian P. Neff, Donald O. Rosenberry, Jacqueline F. Savino, Scott C. Lundstrom
2005, Journal of Great Lakes Research (31) 45-63
Historically, the high potentiometric surface of groundwater in the Silurian/Devonian carbonate aquifer in Monroe County, MI resulted in discharge of highly mineralized, SO4-rich groundwater to the Lake Erie shoreline near both Erie State Game Area (ESGA) and Pointe Mouillee State Game Area (PMSGA). Recently, regional groundwater levels near PMSGA have...
A novel approach to fitting the von Bertalanffy relationship to a mixed stock of Atlantic sturgeon harvested off the New Jersey Coast
James H. Johnson, James E. McKenna Jr., David S. Dropkin, William D. Andrews
2005, Northeastern Naturalist (12) 195-202
We examined the growth characteristics of 303 Atlantic sturgeon, Acipenser oxyrinchus, caught in the commercial fishery off the New Jersey coast from 1992 to 1994 (fork length range: 93–219 cm). Sections taken from the leading pectoral fin ray were used to age each sturgeon. Ages ranged from 5–26 years. Von Bertalanffy...
Pollen analyses from a 50 000-yr rodent midden series in the southern Atacama Desert (25° 30' S)
Antonio Maldonado, Julio L. Betancourt, Claudio Latorre, Carolina Villagran
2005, Journal of Quaternary Science (20) 493-507
Precipitation in northern Chile is controlled by two great wind belts—the southern westerlies over the southern Atacama and points south (> 24° S) and the tropical easterlies over the northern and central Atacama Desert (16–24° S). At the intersection of these summer and winter rainfall regimes, respectively, is a Mars-like landscape...
Ecology of Florida black bears in the Okefenokee-Osceola ecosystem
S. Dobey, D.V. Masters, B.K. Scheick, J. D. Clark, M.R. Pelton, M.E. Sunquist
2005, Wildlife Monographs 1-41
The population status of the Florida black bear (Ursus americanus floridanus) is problematic within many portions of its range and its potential listing as a federally threatened species has been the subject of legal debate. We studied Florida black bears in 2 areas in the Okefenokee-Osceola ecosystem in southeast Georgia...
Bait stations, hard mast, and black bear population growth in Great Smoky Mountains National Park
Joseph D. Clark, Frank T. van Manen, Michael R. Pelton
2005, Journal of Wildlife Management (69) 1633-1640
Bait-station surveys are used by wildlife managers as an index to American black bear (Ursus americanus) population abundance, but the relationship is not well established. Hard mast surveys are similarly used to assess annual black bear food availability which may affect mortality and natality rates. We used data collected in...
Effects of hunting on survival of American woodcock in the Northeast
Daniel G. McAuley, Jerry R. Longcore, David A. Clugston, R. Bradford Allen, A. Weik, Simon Williams, J. Dunn, B. Palmer, K. Evans, W. Staats, Greg F. Sepik, W. Halteman
2005, Journal of Wildlife Management (69) 1565-1577
Numbers of American woodcock (Scolopax minor) males counted on the annual singing ground survey (SGS) have declined over the last 35 years at an average rate of 2.3% per year in the Eastern Region and 1.8% per year in the Central Region. Although hunting was not thought to be...
Evaluation of the landscape surrounding northern bobwhite nest sites: A multiscale analysis
Craig White, Sara H. Schweitzer, Clinton T. Moore, I. B. Parnell, L. A. Lewis-Weis
2005, Journal of Wildlife Management (69) 1528-1537
Implementation of the Conservation Reserve Program (CRP) altered the interspersion and abundance of patches of different land-cover types in landscapes of the southeastern United States. Because northern bobwhites (Colinus virginianus) are experiencing significant population declines throughout most of their range, including the Southeast, it is critical to understand the...
Agronomie implications of waterfowl management in Mississippi ricefields
Scott W. Manley, Richard M. Kaminski, Kenneth J. Reinecke, Patrick D. Gerard
2005, Wildlife Society Bulletin (33) 981-992
Ricefields are important foraging habitat for waterfowl and other waterbirds in several North American wintering areas, including the Mississippi Alluvial Valley (MAV). Rice growers are likely to adopt management practices that provide habitat for waterfowl if agronomic benefits also occur. Therefore, we conducted a replicated field experiment during autumn through...
Designing occupancy studies: General advice and allocating survey effort
Darryl I. MacKenzie, J. Andrew Royle
2005, Journal of Applied Ecology (42) 1105-1114
1.The fraction of sampling units in a landscape where a target species is present (occupancy) is an extensively used concept in ecology. Yet in many applications the species will not always be detected in a sampling unit even when present, resulting in biased estimates of...
Modeling anuran detection and site occupancy on North American Amphibian Monitoring Program (NAAMP) routes in Maryland
Linda Weir, J. Andrew Royle, Priya Nanjappa, Robin E. Jung
2005, Journal of Herpetology (39) 627-639
One of the most fundamental problems in monitoring animal populations is that of imperfect detection. Although imperfect detection can be modeled, studies examining patterns in occurrence often ignore detection and thus fail to properly partition variation in detection from that of occurrence. In this study, we used anuran calling survey...
Modeling association among demographic parameters in analysis of open population capture-recapture data
William A. Link, Richard J. Barker
2005, Biometrics (61) 46-54
We present a hierarchical extension of the Cormack–Jolly–Seber (CJS) model for open population capture–recapture data. In addition to recaptures of marked animals, we model first captures of animals and losses on capture. The parameter set includes capture probabilities, survival rates, and birth rates. The survival rates and birth rates are...
Rejoinder to "The performance of mixture models in heterogeneous closed population capture-recapture"
Robert Dorazio, J. Andrew Royle
2005, Biometrics (61) 874-876
No abstract available....
Nonlinearity and seasonal bias in an index of brushtail possum abundance
David M. Forsyth, William A. Link, R. Webster, G. Nugent, B. Warburton
2005, Journal of Wildlife Management (69) 976-984
Introduced brushtail possums (Trichosurus vulpecula) are a widespread pest of conservation and agriculture in New Zealand, and considerable effort has been expended controlling populations to low densities. A national protocol for monitoring the abundance of possums, termed trap catch index (TCI), was adopted in 1996. The TCI requires that...
Vulnerability of northern prairie wetlands to climate change
W. Carter Johnson, Bruce Millett, Tagir Gilmanov, Richard A. Voldseth, Glenn R. Guntenspergen, David E. Naugle
2005, BioScience (55) 863-872
The prairie pothole region (PPR) lies in the heart of North America and contains millions of glacially formed, depressional wetlands embedded in a landscape matrix of natural grassland and agriculture. These wetlands provide valuable ecosystem services and produce 50% to 80% of the continent's ducks. We explored the...
Estimating site occupancy and abundance using indirect detection indices
Thomas R. Stanley, J. Andrew Royle
2005, Journal of Wildlife Management (69) 874-883
Knowledge of factors influencing animal distribution and abundance is essential in many areas of ecological research, management, and policy-making. Because common methods for modeling and estimating abundance (e.g., capture–recapture, distance sampling) are sometimes not practical for large areas or elusive species, indices are sometimes used as surrogate measures of abundance....
