Panama Canal Watershed Experiment- Agua Salud Project
Robert F. Stallard, Fred L. Ogden, Helmut Elsenbeer, Jefferson S. Hall
2010, Water Resources Impact (12) 17-19
The Agua Salud Project utilizes the Panama Canal’s (Canal) central role in world commerce to focus global attention on the ecosystem services provided by tropical forests. The Canal was one of the great engineering projects in the world. Completed in 1914, after almost a decade of concerted effort, its 80 km...
From points to forecasts: Predicting invasive species habitat suitability in the near term
Tracy R. Holcombe, Thomas J. Stohlgren, Catherine S. Jarnevich
2010, Diversity (2) 738-767
We used near-term climate scenarios for the continental United States, to model 12 invasive plants species. We created three potential habitat suitability models for each species using maximum entropy modeling: (1) current; (2) 2020; and (3) 2035. Area under the curve values for the models ranged from 0.92 to 0.70,...
Mercury concentrations in fish from a Sierra Nevada foothill reservoir located downstream from historic gold-mining operations
Michael K. Saiki, Barbara A. Martin, Thomas W. May, Charles N. Alpers
2010, Environmental Monitoring and Assessment (163) 313-326
This study examined mercury concentrations in whole fish from Camp Far West Reservoir, an 830-ha reservoir in northern California, USA, located downstream from lands mined for gold during and following the Gold Rush of 1848–1864. Total mercury (reported as dry weight concentrations) was highest in spotted bass (mean, 0.93 μg/g; range,...
Identification of marine-derived lipids in juvenile coho salmon and aquatic insects through fatty acid analysis
Ron A. Heintz, Mark S. Wipfli, John P. Hudson
2010, Transactions of the American Fisheries Society (139) 840-854
The energetic benefits enjoyed by consumers in streams with salmon runs depend on how those benefits are accrued. Adult Pacific salmon Oncorhynchus spp. deliver significant amounts of nutrients (i.e., nitrogen and phosphorus) and carbon to streams when they spawn and die; these nutrient additions can have demonstrable effects on primary production in...
Red-shouldered hawk nesting habitat preference in south Texas
Bradley N. Strobel, Clint W. Boal
2010, Journal of Fish and Wildlife Management (1) 33-37
We examined nesting habitat preference by red-shouldered hawks Buteo lineatus using conditional logistic regression on characteristics measured at 27 occupied nest sites and 68 unused sites in 2005–2009 in south Texas. We measured vegetation characteristics of individual trees (nest trees and unused trees) and corresponding 0.04-ha plots. We evaluated the importance of...
Effects of prior detections on estimates of detection probability, abundance, and occupancy
Jason D. Riddle, Rua S. Mordecai, Kenneth H. Pollock, Theodore R. Simons
2010, The Auk (127) 94-99
Survey methods that account for detection probability often require repeated detections of individual birds or repeated visits to a site to conduct Counts or collect presence-absence data. Initial encounters with individual species or individuals of a species could influence detection probabilities for subsequent encounters. For example, observers may be more...
Factors associated with mortality of walleyes and saugers caught in live-release tournaments
Harold Schramm Jr., Bruce C. Vondracek, William E. French, Patrick D. Gerard
2010, North American Journal of Fisheries Management (30) 238-253
We measured the initial mortality (fish judged nonreleasable at weigh-in), prerelease mortality (fish judged nonreleasable 1–2 h after weigh-in [which includes initial mortality]), and postrelease mortality (fish that died during a 5-d retention in net-pens) in 14 live-release tournaments for walleye Sander vitreus conducted in April–October 2006 and April–July 2007 in lakes...
Climate and terrestrial ecosystem change in the U.S. Rocky Mountains and upper Columbia basin: Historical and future perspectives for natural resource management
Gregory T. Pederson, David B. McWethy, Stephen T. Gray, Philip E. Higuera, Jeremy S. Littell, Andrea J. Ray
2010, Report, National Park Service White Paper
Przewalskium albirostre (Artiodactyla: Cervidae)
David M. Leslie Jr.
2010, Mammalian Species (42) 7-18
Przewalskium albirostre (Przewalski, 1883) is a physically unique cervid commonly called the white-lipped deer. Przewalskium is monotypic. This species is a high-elevation specialist endemic to the eastern Tibetan Plateau where it inhabits relatively open hills and mountains with a mosaic of forest edges, meadows, and shrublands. Populations of P. albirostre<span...
Three-dimensional benchmark for variable-density flow and transport simulation: matching semi-analytic stability modes for steady unstable convection in an inclined porous box
Clifford I. Voss, Craig T. Simmons, Neville I. Robinson
2010, Hydrogeology Journal (18) 5-23
This benchmark for three-dimensional (3D) numerical simulators of variable-density groundwater flow and solute or energy transport consists of matching simulation results with the semi-analytical solution for the transition from one steady-state convective mode to another in a porous box. Previous experimental and analytical studies of natural convective flow in an...
A complex-systems approach to predicting effects of sea level rise and nitrogen loading on nitrogen cycling in coastal wetland ecosystems
Laurel G. Larsen, Serena Moseman, Alyson Santoro, Kristine Hopfensperger, Amy Burgin
2010, Book chapter, Eco-DAS VIII Symposium Proceedings
To effectively manage coastal ecosystems, we need an improvedunderstanding of how tidal marsh ecosystem services will respond to sea-level rise and increased nitrogen (N) loading to coastal areas. Here we review existing literature to better understand how these interacting perturbations s will likely impact N removal by tidal marshes. We...
Summary of groundwater-recharge estimates for Pennsylvania
Stuart O. Reese, Dennis W. Risser
2010, Water Resource Report 70
Groundwater recharge is water that infiltrates through the subsurface to the zone of saturation beneath the water table. Because recharge is a difficult parameter to quantify, it is typically estimated from measurements of other parameters like streamflow and precipitation. This report provides a general overview of processes affecting recharge in...
Predictive modeling of transient storage and nutrient uptake: Implications for stream restoration
Ben L. O’Connor, Miki Hondzo, Judson W. Harvey
2010, Journal of Hydraulic Engineering (136) 1018-1032
This study examined two key aspects of reactive transport modeling for stream restoration purposes: the accuracy of the nutrient spiraling and transient storage models for quantifying reach-scale nutrient uptake, and the ability to quantify transport parameters using measurements and scaling techniques in order to improve upon traditional conservative tracer fitting...
Characterizing wet slab and glide slab avalanche occurrence along the Going-to-the-Sun Road, Glacier National Park, Montana, USA
Erich H. Peitzsch, Jordy Hendrikx, Daniel B. Fagre, Blase Reardon
2010, Conference Paper, Proceedings: 2010 international snow science workshop
Wet slab and glide slab snow avalanches are dangerous and yet can be particularly difficult to predict. Both wet slab and glide slab avalanches are thought to depend upon free water moving through the snowpack but are driven by different processes. In Glacier National Park, Montana, both types of avalanches...
A practitioner's tool for assessing glide crack activity
Jordy Hendrikx, Erich H. Peitzsch, Daniel B. Fagre
2010, Conference Paper, Proceedings, 2010 International Snow Science Workshop
Glide cracks can result in full-depth glide avalanche release. Avalanches from glide cracks are notoriously difficult to forecast, but are a reoccurring problem in a number of different avalanche forecasting programs across a range of snow climates. Despite this, there is no consensus for how to best manage, mitigate, or...
Aquatic community responses to salmon carcass analog and wood bundle additions in restored floodplain habitats in an Alaskan stream
Aaron E. Martin, Mark S. Wipfli, Robert E. Spangler
2010, Transactions of the American Fisheries Society (139) 1828-1845
Land use activities often directly and indirectly limit the capacity of freshwater habitats to produce fish. Consequently, habitat creation and enhancement actions are often undertaken to increase the quantity and quality of resources available to aquatic communities within these impaired systems, with the intent to increase fish production. The objectives...
Chemical and isotopic signature of bulk organic matter and hydrocarbon biomarkers within mid-slope accretionary sediments of the northern Cascadia margin gas hydrate system
Masanori Kaneko, Hiroshi Shingai, John W. Pohlman, Hiroshi Naraoka
2010, Marine Geology (275) 166-177
The chemical and isotopic compositions of sedimentary organic matter (SOM) from two mid-slope sites of the northern Cascadia margin were investigated during Integrated Ocean Drilling Program (IODP) Expedition 311 to elucidate the organic matter origins and identify potential microbial contributions to SOM. Gas hydrate is present at both locations (IODP...
Forest exlosures: an experimental approach to understanding browsing by moose and deer
Stephen DeStefano, Edward K. Faison, J. Compton, David W. Wattles
2010, Massachusetts Wildlife (60) 14-17
No abstract available....
The age of the Steens reversal and the Columbia River Basalt Group
Nicholas A. Jarboe, Robert S. Coe, Paul R. Renne, Jonathan M. G. Glen
2010, Chemical Geology (274) 158-168
The Columbia River Basalt Group (CRBG) eruptions have a well-defined relative magnetostratigraphy but have not been definitively correlated to the geomagnetic polarity time scale. 40Ar/39Ar ages are presented from lavas erupted in the R0 through N1magnetozones of the CRBG and in the transition between R0 and N0. Four ages from transitionally magnetized lava flows at Steens Mountain,...
Marine electrical resistivity imaging of submarine groundwater discharge: Sensitivity analysis and application in Waquoit Bay, Massachusetts, USA
Rory Henderson, Frederick D. Day-Lewis, Elena Abarca, Charles F. Harvey, Hanan N. Karam, Lanbo Liu, John W. Lane Jr.
2010, Hydrogeology Journal (18) 173-185
Electrical resistivity imaging has been used in coastal settings to characterize fresh submarine groundwater discharge and the position of the freshwater/salt-water interface because of the relation of bulk electrical conductivity to pore-fluid conductivity, which in turn is a function of salinity. Interpretation of tomograms for hydrologic processes is complicated by...
Geometric evaluation and validation of aerial and satellite data using Sioux Falls Geometric test range
Aparajithan Sampath, Donald Moe, Jon Christopherson, Gregory L. Stensaas
2010, Conference Paper, ASPRS 2010 Annual Conference
No abstract available....
Improved hydrogeophysical characterization and monitoring through parallel modeling and inversion of time-domain resistivity andinduced-polarization data
Timothy C. Johnson, Roelof J. Versteeg, Andy Ward, Frederick D. Day-Lewis, André Revil
2010, Geophysics (75) WA27-WA41
Electrical geophysical methods have found wide use in the growing discipline of hydrogeophysics for characterizing the electrical properties of the subsurface and for monitoring subsurface processes in terms of the spatiotemporal changes in subsurface conductivity, chargeability, and source currents they govern. Presently, multichannel and multielectrode data collections systems can collect...
Use of induced polarization to characterize the hydrogeologic framework of the zone of surface‐water/groundwater exchange at the Hanford 300 Area, WA
Lee Slater, Dimitrios Ntarlagiannis, Frederick D. Day-Lewis, Kisa Mwakanyamale, John W. Lane Jr., Andy Ward, Roelof J. Versteeg
2010, Conference Paper, Symposium on the Application of Geophysics to Engineering and Environmental Problems 2010
An extensive continuous waterborne electrical imaging (CWEI) survey was conducted along the Columbia River corridor adjacent to the U.S. Department of Energy (DOE) Hanford 300 Area, WA, in order to improve the conceptual model for exchange between surface water and U‐contaminated groundwater. The primary objective was to determine spatial variability...
Integrated use of surface geophysical methods for site characterization — A case study in North Kingstown, Rhode Island
Carole D. Johnson, John W. Lane Jr., William C. Brandon, Christine A.P. Williams, Eric A. White
2010, Conference Paper, Symposium on the Application of Geophysics to Engineering and Environmental Problems 2010
A suite of complementary, non‐invasive surface geophysical methods was used to assess their utility for site characterization in a pilot investigation at a former defense site in North Kingstown, Rhode Island. The methods included frequency‐domain electromagnetics (FDEM), ground‐penetrating radar (GPR), electrical resistivity tomography (ERT), and multi‐channel analysis of surface‐wave (MASW)...
Quantifying rock uplift rates using channel steepness and cosmogenic nuclide–determined erosion rates: Examples from northern and southern Italy
Andrew J. Cyr, Darryl E. Granger, Valerio Olivetti, Paola Molin
2010, Lithosphere (2) 188-198
Rock uplift rates can be difficult to measure over 103–105 yr time scales. If, however, a landscape approaches steady state, where hillslope erosion and rock uplift rates are steady and locally similar, then it should be possible to quantify rock uplift rates from hillslope erosion rates. Here, we test this prediction...
