Stormwater plume detection by MODIS imagery in the southern California coastal ocean
N.P. Nezlin, P.M. DiGiacomo, D.W. Diehl, B.H. Jones, S.C. Johnson, M.J. Mengel, K.M. Reifel, J.A. Warrick, M. Wang
2008, Estuarine, Coastal and Shelf Science (80) 141-152
Stormwater plumes in the southern California coastal ocean were detected by MODIS-Aqua satellite imagery and compared to ship-based data on surface salinity and fecal indicator bacterial (FIB) counts collected during the Bight'03 Regional Water Quality Program surveys in February-March of 2004 and 2005. MODIS imagery was processed using a combined...
Annual variation in habitat-specific recruitment success: Implications from an individual-based model of Lake Michigan alewife (Alosa pseudoharengus)
T.O. Hook, E.S. Rutherford, T.E. Croley II, D.M. Mason, C.P. Madenjian
2008, Canadian Journal of Fisheries and Aquatic Sciences (65) 1402-1412
The identification of important spawning and nursery habitats for fish stocks can aid fisheries management, but is complicated by various factors, including annual variation in recruitment success. The alewife (Alosa pseudoharengus) is an ecologically important species in Lake Michigan that utilizes a variety of habitats for spawning and early life...
Minnesota anglers' fisheries-related value orientations and their stewardship of fish resources
J.T. Bruskotter, D.C. Fulton
2008, Human Dimensions of Wildlife (13) 207-221
Research on natural resource-related values and value orientations has grown substantially over the past decade. However, existing studies have focused almost exclusively on value orientations related to wildlife and forests. This article reports data from two mail surveys of Minnesota anglers used to develop scales for measuring fisheries-related value orientations....
What was the groundwater quality before mining in a mineralized region? Lessons from the Questa Project
D. Kirk Nordstrom
2008, Geosciences Journal (12) 139-149
The U.S. Geological Survey, in cooperation with the New Mexico Environment Department and supported by Molycorp, Inc (currently Chevron Minerals), has completed a 5-year investigation (2001-2006) to determine the pre-mining ground-water quality at Molycorp's Questa molybdenum mine in northern New Mexico. Current mine-site ground waters are often contaminated with mine-waste...
Seasonal and diel movements of white sturgeon in the lower columbia river
M.J. Parsley, N.D. Popoff, B. K. Van Der Leeuw, C.D. Wright
2008, Transactions of the American Fisheries Society (137) 1007-1017
Continuous monitoring of the movements and depths used by white sturgeon Acipenser transmontanus with acoustic telemetry technologies in the lower Columbia River provided information on diel and seasonal migrations, local movements, and site fidelity. White sturgeon moved to shallower water at night and showed greater activity, inferred from rates of...
Classification tree models for predicting distributions of michigan stream fish from landscape variables
P.J. Steen, T.G. Zorn, P.W. Seelbach, J.S. Schaeffer
2008, Transactions of the American Fisheries Society (137) 976-996
Traditionally, fish habitat requirements have been described from local-scale environmental variables. However, recent studies have shown that studying landscape-scale processes improves our understanding of what drives species assemblages and distribution patterns across the landscape. Our goal was to learn more about constraints on the distribution of Michigan stream fish by...
Photoreduction fuels biogeochemical cycling of iron in Spain's acid rivers
C.H. Gammons, D. A. Nimick, S.R. Parker, D.M. Snyder, R. Blaine McCleskey, R. Amils, S.R. Poulson
2008, Chemical Geology (252) 202-213
A number of investigations have shown that photoreduction of Fe(III) causes midday accumulations of dissolved Fe(II) in rivers and lakes, leading to large diel (24-h) fluctuations in the concentration and speciation of total dissolved iron. Less well appreciated is the importance of photoreduction in...
Range-wide phylogeographic analysis of the spotted frog complex (Rana luteiventris and Rana pretiosa) in northwestern North America
W.C. Funk, C.A. Pearl, H.M. Draheim, M.J. Adams, T.D. Mullins, S. M. Haig
2008, Molecular Phylogenetics and Evolution (49) 198-210
The dynamic geological and climatic history of northwestern North America has made it a focal region for phylogeography. We conducted a range-wide phylogeographic analysis of the spotted frog complex (Rana luteiventris and Rana pretiosa) across its range in northwestern North America to understand its evolutionary history and the distribution of...
Humid tropical forest clearing from 2000 to 2005 quantified by using multitemporal and multiresolution remotely sensed data
Matthew C. Hansen, S.V. Stehman, Peter V. Potapov, Thomas R. Loveland, J.R.G. Townshend, R.S. DeFries, K.W. Pittman, B. Arunarwati, F. Stolle, M.K. Steininger, M. Carroll, C. DiMiceli
2008, Proceedings of the National Academy of Sciences of the United States of America (105) 9439-9444
Forest cover is an important input variable for assessing changes to carbon stocks, climate and hydrological systems, biodiversity richness, and other sustainability science disciplines. Despite incremental improvements in our ability to quantify rates of forest clearing, there is still no definitive understanding on global trends. Without timely and accurate forest...
Genetic identity of brook trout in Lake Superior south shore streams: Potential for genetic monitoring of stocking and rehabilitation efforts
Brian L. Sloss, Martin J. Jennings, R. Franckowiak, D.M. Pratt
2008, Transactions of the American Fisheries Society (137) 1244-1251
Rehabilitation of migratory ('coaster') brook trout Salvelinus fontinalis along Lake Superior's south shore is a topic of high interest among resource stakeholders and management agencies. Proposed strategies for rehabilitation of this brook trout life history variant in Wisconsin include supplemental stocking, watershed management, habitat rehabilitation, harvest regulations, or a combination...
Carbon isotope fractionation of dissolved inorganic carbon (DIC) due to outgassing of carbon dioxide from a headwater stream
D.H. Doctor, C. Kendall, S.D. Sebestyen, J. B. Shanley, N. Ohte, E.W. Boyer
2008, Hydrological Processes (22) 2410-2423
The stable isotopic composition of dissolved inorganic carbon (??13C-DIC) was investigated as a potential tracer of streamflow generation processes at the Sleepers River Research Watershed, Vermont, USA. Downstream sampling showed ?? 13C-DIC increased between 3-5??? from the stream source to the outlet weir approximately 0??5 km downstream, concomitant with increasing...
Trends in snowpack chemistry and comparison to National Atmospheric Deposition Program results for the Rocky Mountains, US, 1993-2004
G.P. Ingersoll, M.A. Mast, K. Campbell, D. W. Clow, L. Nanus, J.T. Turk
2008, Atmospheric Environment (42) 6098-6113
Seasonal snowpack chemistry data from the Rocky Mountain region of the US was examined to identify long-term trends in concentration and chemical deposition in snow and in snow-water equivalent. For the period 1993-2004, comparisons of trends were made between 54 Rocky Mountain Snowpack sites and 16 National Atmospheric Deposition Program...
Modeling distribution of dispersal distances in male white-tailed deer
Duane R. Diefenbach, E.S. Long, C.S. Rosenberry, B.D. Wallingford, D. R. Smith
2008, Journal of Wildlife Management (72) 1296-1303
Dispersal distances and their distribution pattern are important to understanding such phenomena as disease spread and gene flow, but oftentimes dispersal characteristics are modeled as a fixed trait for a given species. We found that dispersal distributions differ for spring and autumn dispersals of yearling male white-tailed deer (Odocoileus virginianus)...
Fish assemblages of the Casiquiare River, a corridor and zoogeographical filter for dispersal between the Orinoco and Amazon basins
K.O. Winemiller, H. Lopez-Fernandez, D.C. Taphorn, L.G. Nico, A.B. Duque
2008, Journal of Biogeography (35) 1551-1563
Aim: The aim of this study was to determine whether the Casiquiare River functions as a free dispersal corridor or as a partial barrier (i.e. filter) for the interchange of fish species of the Orinoco and Negro/Amazon basins using species assemblage patterns according to geographical location and environmental features. Location:...
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,...
North polar region of Mars: Advances in stratigraphy, structure, and erosional modification
Kenneth L. Tanaka, J. Alexis P. Rodriguez, James A. Skinner, Mary C. Bourke, Corey M. Fortezzo, Kenneth E. Herkenhoff, Eric J. Kolb, Chris Okubo
2008, Icarus (196) 318-358
We have remapped the geology of the north polar plateau on Mars, Planum Boreum, and the surrounding plains of Vastitas Borealis using altimetry and image data along with thematic maps resulting from observations made by the Mars Global Surveyor, Mars Odyssey, Mars Express, and Mars Reconnaissance Orbiter spacecraft. New and revised geographic and...
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...
Movement patterns and study area boundaries: Influences on survival estimation in capture-mark-recapture studies
G.E. Horton, B. H. Letcher
2008, Oikos (117) 1131-1142
The inability to account for the availability of individuals in the study area during capture-mark-recapture (CMR) studies and the resultant confounding of parameter estimates can make correct interpretation of CMR model parameter estimates difficult. Although important advances based on the Cormack-Jolly-Seber (CJS) model have resulted in estimators of true survival...
Comparison of two U.S. power-plant carbon dioxide emissions data sets
K.V. Ackerman, E.T. Sundquist
2008, Environmental Science & Technology (42) 5688-5693
Estimates of fossil-fuel CO2 emissions are needed to address a variety of climate-change mitigation concerns over a broad range of spatial and temporal scales. We compared two data sets that report power-plant CO 2 emissions in the conterminous U.S. for 2004, the most recent year reported in both data sets....
Data-resolution matrix and model-resolution matrix for Rayleigh-wave inversion using a damped least-squares method
J. Xia, R. D. Miller, Y. Xu
2008, Pure and Applied Geophysics (165) 1227-1248
Inversion of multimode surface-wave data is of increasing interest in the near-surface geophysics community. For a given near-surface geophysical problem, it is essential to understand how well the data, calculated according to a layered-earth model, might match the observed data. A data-resolution matrix is a function of the data kernel...
Reactive flow models of the Anarraaq Zn-Pb-Ag deposit, Red Dog district, Alaska
C. Schardt, G. Garven, K.D. Kelley, D. L. Leach
2008, Mineralium Deposita (43) 735-757
The Red Dog ore deposit district in the Brooks Range of northern Alaska is host to several high-grade, shale-hosted Zn + Pb deposits. Due to the complex history and deformation of these ore deposits, the geological and hydrological conditions at the time of formation are poorly understood. Using geological observations...
Permeameter data verify new turbulence process for MODFLOW
Eve L. Kuniansky, Keith J. Halford, W. Barclay Shoemaker
2008, Ground Water (46) 768-771
A sample of Key Largo Limestone from southern Florida exhibited turbulent flow behavior along three orthogonal axes as reported in recently published permeameter experiments. The limestone sample was a cube measuring 0.2 m on edge. The published nonlinear relation between hydraulic gradient and discharge was simulated using the turbulent flow...
Subspecific affinities and conservation genetics of western big-eared bats (Corynorhinus townsendii pallescens) at the edge of their distributional range
S.J. Smith, David M. Leslie Jr., M.J. Hamilton, Justin B. Lack, Ronald A. Van Den Bussche
2008, Journal of Mammalogy (89) 799-814
Subspecific affinities, determination of population boundaries, and levels of population connectedness are of critical importance for the development of management and conservation planning. We used variation at a mitochondrial locus and 5 biparentally inherited nuclear loci to determine partitioning of genetic variation of western big-eared bats (Corynorhinus townsendii) within and...
Use of complex hydraulic variables to predict the distribution and density of unionids in a side channel of the Upper Mississippi River
J. J. Steuer, T.J. Newton, S. J. Zigler
2008, Hydrobiologia (610) 67-82
Previous attempts to predict the importance of abiotic and biotic factors to unionids in large rivers have been largely unsuccessful. Many simple physical habitat descriptors (e.g., current velocity, substrate particle size, and water depth) have limited ability to predict unionid density. However, more recent studies have found that complex hydraulic...
Compositional stratigraphy of clay-bearing layered deposits at Mawrth Vallis, Mars
J.J. Wray, B.L. Ehlmann, S. W. Squyres, J.F. Mustard, Randolph L. Kirk
2008, Geophysical Research Letters (35)
Phyllosilicates have previously been detected in layered outcrops in and around the Martian outflow channel Mawrth Vallis. CRISM spectra of these outcrops exhibit features diagnostic of kaolinite, montmorillonite, and Fe/Mg-rich smectites, along with crystalline ferric oxide minerals such as hematite. These minerals occur in distinct stratigraphic horizons, implying changing environmental...
