Utilization of protein expression profiles as indicators of environmental impairment of smallmouth bass (Micropterus dolomieu) from the Shenandoah River, Virginia, USA
J. Ripley, L. Iwanowicz, V. Blazer, C. Foran
2008, Environmental Toxicology and Chemistry (27) 1756-1767
The Shenandoah River (VA, USA), the largest tributary of the Potomac River (MD, USA) and an important source of drinking water, has been the site of extensive fish kills since 2004. Previous investigations indicate environmental stressors may be adversely modulating the immune system of smallmouth bass...
Global daily reference evapotranspiration modeling and evaluation
G.B. Senay, J. P. Verdin, R. Lietzow, Assefa M. Melesse
2008, Journal of the American Water Resources Association (44) 969-979
Accurate and reliable evapotranspiration (ET) datasets are crucial in regional water and energy balance studies. Due to the complex instrumentation requirements, actual ET values are generally estimated from reference ET values by adjustment factors using coefficients for water stress and vegetation conditions, commonly referred to as crop coefficients. Until recently,...
Detecting the response of fish assemblages to stream restoration: Effects of different sampling designsf
Barry P. Baldigo, D.R. Warren
2008, North American Journal of Fisheries Management (28) 919-934
Increased trout production within limited stream reaches is a popular goal for restoration projects, yet investigators seldom monitor, assess, or publish the associated effects on fish assemblages. Fish community data from a total of 40 surveys at restored and reference reaches in three streams of the Catskill Mountains, New York,...
Linking landscapes and habitat suitability scores for diadromous fish restoration in the susquehanna river basin
P.M. Kocovsky, R. M. Ross, D. S. Dropkin, J.M. Campbell
2008, North American Journal of Fisheries Management (28) 906-918
Dams within the Susquehanna River drainage, Pennsylvania, are potential barriers to migration of diadromous fishes, and many are under consideration for removal to facilitate fish passage. To provide useful input for prioritizing dam removal, we examined relations between landscape-scale factors and habitat suitability indices (HSIs) for native diadromous species of...
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...
Evaluating the effects of historical land cover change on summertime weather and climate in New Jersey: Land cover and surface energy budget changes
P. S. Wichansky, L. T. Steyaert, R. L. Walko, C. P. Waever
2008, Journal of Geophysical Research-Atmospheres (113)
The 19th-century agrarian landscape of New Jersey (NJ) and the surrounding region has been extensively transformed to the present-day land cover by urbanization, reforestation, and localized areas of deforestation. This study used a mesoscale atmospheric numerical model to investigate the sensitivity of the warm season climate of NJ to these...
Determining Titan's spin state from Cassini RADAR images
B.W. Stiles, Randolph L. Kirk, R. D. Lorenz, S. Hensley, E. Lee, S.J. Ostro, M.D. Allison, P.S. Callahan, Y. Gim, L. Iess, Del Marmo, G. Hamilton, W.T.K. Johnson, R.D. West
2008, Astronomical Journal (135) 1669-1680
For some 19 areas of Titan's surface, the Cassini RADAR instrument has obtained synthetic aperture radar (SAR) images during two different flybys. The time interval between flybys varies from several weeks to two years. We have used the apparent misregistration (by 10-30 km) of features between separate flybys to construct...
Using bioenergetics modeling to estimate consumption of native juvenile salmonids by nonnative northern pike in the Upper Flathead River System, Montana
C.C. Muhlfeld, D.H. Bennett, Steinhorst R. Kirk, B. Marotz, M. Boyer
2008, North American Journal of Fisheries Management (28) 636-648
Introductions of nonnative northern pike Esox lucius have created recreational fisheries in many waters in the United States and Canada, yet many studies have shown that introduced northern pike may alter the composition and structure of fish communities through predation. We estimated the abundance of nonnative northern pike (2002-2003) and...
Use of landsat ETM+ SLC-off segment-based gap-filled imagery for crop type mapping
S.K. Maxwell, M.E. Craig
2008, Geocarto International (23) 169-179
Failure of the Scan Line Corrector (SLC) on the Landsat ETM+ sensor has had a major impact on many applications that rely on continuous medium resolution imagery to meet their objectives. The United States Department of Agriculture (USDA) Cropland Data Layer (CDL) program uses Landsat imagery as the primary source...
Satellite-derived aerosol radiative forcing from the 2004 British Columbia wildfires
Song Guo, H. Leighton
2008, Atmosphere - Ocean (46) 203-212
The British Columbia wildfires of 2004 was one of the largest wildfire events in the last ten years in Canada. Both the shortwave and longwave smoke aerosol radiative forcing at the top-of-atmosphere (TOA) are investigated using data from the Moderate Resolution Imaging Spectroradiometer (MODIS) and the Clouds and the Earth's...
A reference data set of hillslope rainfall-runoff response, Panola Mountain Research Watershed, United States
Meerveld H. J. Tromp-van H. J., A.L. James, Jeffery J. McDonnell, N.E. Peters
2008, Water Resources Research (44)
Although many hillslope hydrologic investigations have been conducted in different climate, topographic, and geologic settings, subsurface stormflow remains a poorly characterized runoff process. Few, if any, of the existing data sets from these hillslope investigations are available for use by the scientific community for model development and validation or conceptualization...
Analytical and numerical analyses of an unconfined aquifer test considering unsaturated zone characteristics
A.F. Moench
2008, Water Resources Research (44)
A 7-d, constant rate aquifer test conducted by University of Waterloo researchers at Canadian Forces Base Borden in Ontario, Canada, is useful for advancing understanding of fluid flow processes in response to pumping from an unconfined aquifer. Measured data include not only drawdown in the saturated zone but also volumetric...
Surface albedo observations at Gusev Crater and Meridiani Planum, Mars
J.F. Bell III, M.S. Rice, J. R. Johnson, T.M. Hare
2008, Journal of Geophysical Research E: Planets (113)
During the Mars Exploration Rover mission, the Pancam instrument has periodically acquired large-scale panoramic images with its broadband (739??338 nm) filter in order to estimate the Lambert bolometric albedo of the surface along each rover's traverse. In this work we present the full suite of such estimated albedo values measured...
Climate-induced variations of geyser periodicity in Yellowstone National Park, USA
Shaul Hurwitz, Ashish Kumar, Ralph Taylor, Henry Heasler
2008, Geology (36) 451-454
The geysers of Yellowstone National Park, United States, attract millions of visitors each year, and their eruption dynamics have been the subject of extensive research for more than a century. Although many of the fundamental aspects associated with the dynamics of geyser eruptions have been elucidated, the relationship between external...
Hydrocarbon lakes on Titan: Distribution and interaction with a porous regolith
A. Hayes, O. Aharonson, P. Callahan, C. Elachi, Y. Gim, Randolph L. Kirk, K. Lewis, R. Lopes, R. Lorenz, J. Lunine, Ken Mitchell, Giuseppe Mitri, E. Stofan, S. Wall
2008, Geophysical Research Letters (35)
Synthetic Aperture Radar (SAR) images of Titan's north polar region reveal quasi‐circular to complex features which are interpreted to be liquid hydrocarbon lakes. We investigate methane transport in Titan's hydrologic cycle using the global distribution of lake features. As of May 2007, the SAR data set covers ∼22% of the...
Mars Exploration Rover Navigation Camera in-flight calibration
J.M. Soderblom, J.F. Bell III, J. R. Johnson, J. Joseph, M.J. Wolff
2008, Journal of Geophysical Research E: Planets (113)
The Navigation Camera (Navcam) instruments on the Mars Exploration Rover (MER) spacecraft provide support for both tactical operations as well as scientific observations where color information is not necessary: large-scale morphology, atmospheric monitoring including cloud observations and dust devil movies, and context imaging for both the thermal emission spectrometer and...
Estimating species occurrence, abundance, and detection probability using zero-inflated distributions
S.J. Wenger, Mary C. Freeman
2008, Ecology (89) 2953-2959
Researchers have developed methods to account for imperfect detection of species with either occupancy (presence-absence) or count data using replicated sampling. We show how these approaches can be combined to simultaneously estimate occurrence, abundance, and detection probability by specifying a zero-inflated distribution for abundance. This approach may be...
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...
Migration of Florida sub-adult Bald Eagles
E.K. Mojica, J.M. Meyers, B.A. Millsap, K.L. Haley
2008, Wilson Journal of Ornithology (120) 304-310
We used satellite telemetry locations accurate within 1 km to identify migration routes and stopover sites of 54 migratory sub-adult Bald Eagles (Haliaeetus leucocephalus) hatched in Florida from 1997 to 2001. We measured number of days traveled during migration, path of migration, stopover time and locations, and distance traveled...
A hierarchical model for spatial capture-recapture data
J. Andrew Royle, K.V. Young
2008, Ecology (89) 2281-2289
Estimating density is a fundamental objective of many animal population studies. Application of methods for estimating population size from ostensibly closed populations is widespread, but ineffective for estimating absolute density because most populations are subject to short-term movements or so-called temporary emigration. This phenomenon invalidates the resulting estimates...
Importance of sampling design and analysis in animal population studies: a comment on Sergio et al
M. Kery, J. Andrew Royle, Hans Schmid
2008, Journal of Applied Ecology (45) 981-986
1. The use of predators as indicators and umbrellas in conservation has been criticized. In the Trentino region, Sergio et al. (2006; hereafter SEA) counted almost twice as many bird species in quadrats located in raptor territories than in controls. However, SEA detected astonishingly few species. We...
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...
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...
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)....
Potential effects of mixed infections in ticks on transmission dynamics of pathogens: comparative analysis of published records
Howard S. Ginsberg
2008, Experimental and Applied Acarology (46) 29-41
Ticks are often infected with more than one pathogen, and several field surveys have documented nonrandom levels of coinfection. Levels of coinfection by pathogens in four tick species were analyzed using published infection data. Coinfection patterns of pathogens in field-collected ticks include numerous cases of higher or lower...
