Analytical characterization of selective benthic flux components in estuarine and coastal waters
Jeffrey N. King
2011, Book chapter, Treatise on Estuarine and Coastal Science
Benthic flux is the rate of flow across the bed of a water body, per unit area of bed. It is forced by component mechanisms, which interact. For example, pressure gradients across the bed, forced by tide, surface gravity waves, density gradients, bed–current interaction, turbulence, and terrestrial hydraulic gradients, drive...
Perceptions of fish habitat conditions in Oklahoma tailwater fisheries: a survey of fisheries managers
James M. Long
2011, Proceedings of the Southeastern Association of Fish and Wildlife Agencies (65) 119-124
While the downstream effects of dams on fish habitat have long been recognized, broad-scale assessments of tailwater fish habitat have rarely been conducted. In this paper, I report on the status of tailwater fisheries in Oklahoma as determined through a web-based survey of fisheries biologists with the Oklahoma Department of...
An evaluation of agreement between pectoral spines and otoliths for estimating ages of catfishes
J.A. Olive, Harold Schramm Jr., Patrick D. Gerard, E. Irwin
2011, American Fisheries Society Symposium (77) 679-688
Otoliths have been shown to provide more accurate ages than pectoral spine sections for several catfish populations; but sampling otoliths requires euthanizing the specimen, whereas spines can be sampled non-lethally. To evaluate whether, and under what conditions, spines provide the same or similar age estimates as otoliths, we examined data...
Natural phosphorus sources for the Pacific Northwest
Henry M. Johnson
2011, Report
Phosphorus is a naturally occurring element found in all rocks; the amount varies by the type of rock. The amount of phosphorus in sediments is expected to be correlated with the amount of phosphorus in the parent rocks. Streambed sediment collected by the National Uranium Resource Evaluation (NURE) Program were...
Land cover change, biogeochemical modelling of carbon stocks, and climate change in West Africa
Larry L. Tieszen, G. Gray Tappan, Z. Tan, E. Tachie-Obeng
2011, Conference Paper, Africa and the carbon cycle: Proceedings of the open science conference
The carbon in ecosystems exists in dynamic soil and vegetation pools which vary in amounts and cycle with the global atmosphere at varying rates. These stocks and fluxes play important roles in global carbon regulation and in the maintenance of goods and services. Changes in land cover or ecosystems result...
The May 2005 eruption of Fernandina volcano, Galápagos: The first circumferential dike intrusion observed by GPS and InSAR
W.W. Chadwick Jr., Sigurjon Jonsson, Dennis J. Geist, Michael P. Poland, Daniel J. Johnson, S. Batt, Karen S. Harpp, A. Ruiz
2011, Bulletin of Volcanology (73) 679-697
The May 2005 eruption of Fernandina volcano, Galápagos, occurred along circumferential fissures parallel to the caldera rim and fed lava flows down the steep southwestern slope of the volcano for several weeks. This was the first circumferential dike intrusion ever observed by both InSAR and GPS measurements and thus provides...
Factors affecting detectability of river otters during sign surveys
Mackenzie R. Jeffress, Craig P. Paukert, Brett K. Sandercock, Philip S. Gipson
2011, Journal of Wildlife Management (75) 144-150
Sign surveys are commonly used to study and monitor wildlife species but may be flawed when surveys are conducted only once and cover short distances, which can lead to a lack of accountability for false absences. Multiple observers surveyed for river otter (Lontra canadensis) scat and tracks along stream and...
Input, calibration, uncertainty, and limitations of the basin characterization model: appendix three
Alan L. Flint, Lorraine E. Flint, Melissa D. Masbruch
Victor M. Heilweil, Lynette E. Brooks, editor(s)
2011, Book chapter, Conceptual model of the Great Basic carbonate and alluvial aquifer system
No abstract available....
Sagebrush ecosystem conservation and management: Ecoregional assessment tools and models for the Wyoming Basins
Steve E. Hanser, Matthias Leu, Steven T. Knick, Cameron L. Aldridge, editor(s)
2011, Book
The Wyoming Basins are one of the remaining strongholds of the sagebrush ecosystem. However, like most sagebrush habitats, threats to this region are numerous. This book adds to current knowledge about the regional status of the sagebrush ecosystem, the distribution of habitats, the threats to the ecosystem, and the influence...
Land remote sensing and global environmental change: NASA's Earth observing system and the science of ASTER and MODIS
Bhaskar Ramachandran, Christopher O. Justice, Michael J. Abrams
2011, Book
No abstract available....
Patch reefs: Lidar morphometric analysis
John Brock, Monica Palaseanu-Lovejoy
David Hopley, editor(s)
2011, Book chapter, Encyclopedia of modern coral reefs: Structure, form and process
Alina Reef is one of several thousand patch reefs that lie across the shallow carbonate platform seaward of Hawk Channel off the northern Florida Keys. The site is near the northern latitudinal fringe of the late Holocene western Atlantic coral reef distribution (Figure 1). The area is covered by calcareous sand...
Introduction: An ecoregional assessment of the Wyoming Basins
Steven T. Knick, Steve E. Hanser, Matthias Leu, Cameron L. Aldridge, Michael J. Wisdom
2011, Book chapter, Sagebrush ecosystem conservation and management: Ecoregional assessment tools and models for the Wyoming Basins
The Wyoming Basins Ecoregional Assessment (WBEA) area in the western United States contains a number of important land cover types, including nearly one-fourth of the sagebrush (Artemisia spp.) in North America. Although relatively unappreciated until recent decades, the broad open landscapes dominated by sagebrush communities have received increasing attention for...
Deep rock damage in the San Andreas Fault revealed by P- and S-type fault-zone-guided waves
William L. Ellsworth, Peter E. Malin
2011, Book chapter, Geology of the earthquake source: a volume in honour of Rick Sibson
Damage to fault-zone rocks during fault slip results in the formation of a channel of low seismic-wave velocities. Within such channels guided seismic waves, denoted by Fg, can propagate. Here we show with core samples, well logs and Fg-waves that such a channel is crossed by the SAFOD (San...
Distribution and abundance of saltcedar and Russian olive in the western United States
Pamela L. Nagler, Edward P. Glenn, Catherine S. Jarnevich, Patrick B. Shafroth
2011, Critical Reviews in Plant Science (30) 508-523
Over the past century, two introduced Eurasian trees, saltcedar (Tamarix spp.) and Russian olive (Elaeagnus angustifolia) have become wide spread on western United States of American (U.S.) rivers. This paper reviews the literature on the following five key areas related to their distribution and abundance in the western United States:...
Geoinformatics in the public service: Building a cyberinfrastructure across the geological surveys
M. Lee Allison, Linda C. Gundersen, Stephen M. Richard
G. Randy Keller, Chaitanya Baru, editor(s)
2011, Book chapter, Geoinformatics: cyberinfrastructure for the solid Earth sciences
Advanced information technology infrastructure is increasingly being employed in the Earth sciences to provide researchers with efficient access to massive central databases and to integrate diversely formatted information from a variety of sources. These geoinformatics initiatives enable manipulation, modeling and visualization of data in a consistent way, and are helping...
Florida Keys
Barbara H Lidz
2011, Book chapter, Encyclopedia of modern coral reefs: Structure, form and process
No abstract available....
Airborne dust impacts
Eugene A Shinn, Barbara H Lidz
2011, Book chapter, Encyclopedia of modern coral reefs: Structure, form and process
No abstract available....
Landsat imagery: a unique resource
H. Miller, N. Sexton, L. Koontz
2011, Report
Landsat satellites provide high-quality, multi-spectral imagery of the surface of the Earth. These moderate-resolution, remotely sensed images are not just pictures, but contain many layers of data collected at different points along the visible and invisible light spectrum. These data can be manipulated to reveal what the Earth’s surface looks...
Nutrient inputs to the Laurentian Great Lakes by source and watershed estimated using SPARROW watershed models
Dale M. Robertson, David A. Saad
2011, Journal of the American Water Resources Association (47) 1011-1033
Nutrient input to the Laurentian Great Lakes continues to cause problems with eutrophication. To reduce the extent and severity of these problems, target nutrient loads were established and Total Maximum Daily Loads are being developed for many tributaries. Without detailed loading information it is difficult to determine if the targets...
Chapter 2: Sagebrush-associated species of conservation concern
Mary M. Rowland, Lowell H. Suring, Matthias Leu, Steven T. Knick, Michael J. Wisdom
2011, Book chapter, Sagebrush ecosystem conservation and management: Ecoregional assessment tools and models for the Wyoming Basins
Selection of species of concern is a critical early step in conducting broad-scale ecological assessments for conservation planning and management. Many criteria can be used to guide this selection, such as conservation status, existing knowledge base, and association with plant communities of interest. In conducting the Wyoming Basins Ecoregional Assessment...
Chapter 1: Study area description
Mary M. Rowland, Matthias Leu
2011, Book chapter, Sagebrush ecosystem conservation and management: Ecoregional assessment tools and models for the Wyoming Basins
The boundary for the Wyoming Basins Ecoregional Assessment (WBEA) was largely determined by the co-occurrence of some of the largest tracts of intact sagebrush (Artemisia spp.) remaining in the western United States with areas of increasing resource extraction. The WBEA area includes two ecoregions in their entirety, Wyoming Basins and...
A novel photosynthetic strategy for adaptation to low-iron aquatic environments
D. Chauhan, I.M. Folea, C.C. Jolley, R. Kouril, C.E. Lubner, S. Lin, D. Kolber, Felisa Wolfe-Simon, J.H. Golbeck, E.J. Boekema, P. Fromme
2011, Biochemistry (50) 686-692
Iron (Fe) availability is a major limiting factor for primary production in aquatic environments. Cyanobacteria respond to Fe deficiency by derepressing the isiAB operon, which encodes the antenna protein IsiA and flavodoxin. At nanomolar Fe concentrations, a PSI−IsiA supercomplex forms, comprising a PSI trimer encircled by two complete IsiA rings. This PSI−IsiA...
Numerical modeling of the impact of sea-level rise on fringing coral reef hydrodynamics and sediment transport
C. D. Storlazzi, E. Elias, M.E. Field, M.K. Presto
2011, Coral Reefs (30) 83-96
Most climate projections suggest that sea level may rise on the order of 0.5-1.0 m by 2100; it is not clear, however, how fluid flow and sediment dynamics on exposed fringing reefs might change in response to this rapid sea-level rise. Coupled hydrodynamic and sediment-transport numerical modeling is consistent with...
A Digital Hydrologic Network Supporting NAWQA MRB SPARROW Modeling--MRB_E2RF1WS
J. W. Brakebill, S.E. Terziotti
2011, Report
A digital hydrologic network was developed to support SPAtially Referenced Regression on Watershed attributes (SPARROW) models within selected regions of the United States. These regions correspond with the U.S. Geological Survey's National Water Quality Assessment (NAWQA) Program Major River Basin (MRB) study units 2, 3, 4, 5, and 7 (Preston...
Evidence for mechanical and chemical alteration of iron-nickel meteorites on Mars: Process insights for Meridiani Planum
James W. Ashley, M.P. Golombek, P. R. Christensen, S. W. Squyres, T.J. McCoy, C. Schroder, I. Fleischer, J. R. Johnson, Kenneth E. Herkenhoff, T. J. Parker
2011, Journal of Geophysical Research E: Planets (116)
The weathering of meteorites found on Mars involves chemical and physical processes that can provide clues to climate conditions at the location of their discovery. Beginning on sol 1961, the Opportunity rover encountered three large iron meteorites within a few hundred meters of each other. In order of discovery, these...
