The 3D Elevation Program: summary for Texas
William J. Carswell Jr.
2013, Fact Sheet 2013-3097
Elevation data are essential to a broad range of applications, including forest resources management, wildlife and habitat management, national security, recreation, and many others. For the State of Texas, elevation data are critical for natural resources conservation; wildfire management, planning, and response; flood risk management; agriculture and precision farming; infrastructure...
Understanding water column and streambed thermal refugia for endangered mussels in the Delaware River
Martin A. Briggs, Emily B. Voytek, Frederick D. Day-Lewis, Donald O. Rosenberry, John W. Lane Jr.
2013, Environmental Science & Technology (47) 11423-11431
Groundwater discharge locations along the upper Delaware River, both discrete bank seeps and diffuse streambed upwelling, may create thermal niche environments that benefit the endangered dwarf wedgemussel (Alasmidonta heterodon). We seek to identify whether discrete or diffuse groundwater inflow is the dominant control on refugia. Numerous springs and seeps were...
Oceanographic controls on sedimentary and geochemical facies on the Peru outer shelf and upper slope
Michael A. Arthur, Walter E. Dean
2013, Open-File Report 2013-1105
Concentrations and characteristics of organic matter in surface sediments deposited under an intense oxygen-minimum zone (OMZ) on the Peru margin were mapped and studied in samples from deck-deployed box cores and push cores acquired by submersible on two east-west transects spanning depths of 75 to 1,000 meters (m) at 12°S...
Emergency assessment of post-fire debris-flow hazards for the 2013 Powerhouse fire, southern California
Dennis M. Staley, Gregory M. Smoczyk, Ryan R. Reeves
2013, Open-File Report 2013-1248
Wildfire dramatically alters the hydrologic response of a watershed such that even modest rainstorms can produce dangerous flash floods and debris flows. Existing empirical models were used to predict the probability and magnitude of debris-flow occurrence in response to a 10-year recurrence interval rainstorm for the 2013 Powerhouse fire near...
Emergency assessment of post-fire debris-flow hazards for the 2013 Mountain fire, southern California
Dennis M. Staley, Joseph E. Gartner, Greg M. Smoczyk, Ryan R. Reeves
2013, Open-File Report 2013-1249
Wildfire dramatically alters the hydrologic response of a watershed such that even modest rainstorms can produce dangerous flash floods and debris flows. We use empirical models to predict the probability and magnitude of debris flow occurrence in response to a 10-year rainstorm for the 2013 Mountain fire near Palm Springs,...
Geologic map of the Washougal quadrangle, Clark County, Washington, and Multnomah County, Oregon
Russell C. Evarts, Jim E. O'Connor, Terry L. Tolan
2013, Scientific Investigations Map 3257
The Washougal 7.5’ quadrangle spans the boundary between the Portland Basin and the Columbia River Gorge, approximately 30 km east of Portland, Oregon. The map area contains the westernmost portion of the Columbia River Gorge National Scenic area as well as the rapidly growing areas surrounding the Clark County, Washington,...
Estimates of subyearling fall Chinook salmon rearing habitat in Lower Granite reservoir
Kenneth F. Tiffan, James R. Hatten
2013, Report
No abstract available....
The role of dust storms in total atmospheric particle concentrations at two sites in the western U.S.
Jason C. Neff, Richard L. Reynolds, Seth M. Munson, Daniel Fernandez, Jayne Belnap
2013, Journal of Geophysical Research D: Atmospheres (118) 11201-11212
Mineral aerosols are produced during the erosion of soils by wind and are a common source of particles (dust) in arid and semiarid regions. The size of these particles varies widely from less than 2 µm to larger particles that can exceed 50 µm in diameter. In this study, we...
Composition and origin of rhyolite melt intersected by drilling in the Krafla geothermal field, Iceland
R.A. Zierenberg, Peter Schiffmant, G.H. Barfod, C.E. Lesher, N.E. Marks, Jacob B. Lowenstern, A.K. Mortensen, E.C. Pope, D.K. Bird, M.H. Reed, G.O. Fridleifsson, W.A. Elders
2013, Contributions to Mineralogy and Petrology (165) 327-347
The Iceland Deep Drilling Project Well 1 was designed as a 4- to 5-km-deep exploration well with the goal of intercepting supercritical hydrothermal fluids in the Krafla geothermal field, Iceland. The well unexpectedly drilled into a high-silica (76.5 % SiO2) rhyolite melt at approximately 2.1 km. Some of the melt...
Bayes and empirical Bayes estimators of abundance and density from spatial capture-recapture data
Robert M. Dorazio
2013, PLoS ONE (8)
In capture-recapture and mark-resight surveys, movements of individuals both within and between sampling periods can alter the susceptibility of individuals to detection over the region of sampling. In these circumstances spatially explicit capture-recapture (SECR) models, which incorporate the observed locations of individuals, allow population density and abundance to be estimated...
Rangewide glaciation in the Sierra Nevada, California
James G. Moore, Barry C. Moring
2013, Geosphere (9) 1804-1818
The 600-km-long Sierra Nevada underwent extensive Pleistocene glaciation except for its southernmost 100 km. Presently, ∼1700 small glaciers and ice masses near the crest of the range occur above 3250 m in elevation; these covered an area of ∼50 km2 in 1972. Fourteen of the largest glaciers decreased by about one...
Response of brown-headed cowbirds and three host species to thinning treatments in low-elevation ponderosa pine forests along the northern Colorado Front Range
W.H. Keeley, Steve Germaine, Thomas R. Stanley, Sarah A. Spaulding, C.E. Wanner
2013, Forest Ecology and Management (306) 226-233
Thinning ponderosa pine (Pinus ponderosa) forests to achieve desired ecological conditions remains a priority in the North American west. In addition to reducing the risk of high-severity wildfires in unwanted areas, stand thinning may increase wildlife and plant diversity and provide increased opportunity for seedling recruitment. We initiated conservative (i.e....
Inferring the relative resilience of alternative states
David G. Angeler, Craig R. Allen, Carmen Rojo, Miguel Alvarez-Cobelas, Maria A. Rodrigo, Salvador Sanchez-Carrillo
2013, PLoS ONE (8)
Ecological systems may occur in alternative states that differ in ecological structures, functions and processes. Resilience is the measure of disturbance an ecological system can absorb before changing states. However, how the intrinsic structures and processes of systems that characterize their states affects their resilience remains unclear. We analyzed time...
Implications of the miocene(?) crooked ridge river of northern arizona for the evolution of the colorado river and grand canyon
Ivo Lucchitta, Richard F. Holm, Baerbel K. Lucchitta
2013, Geosphere (9) 1417-1433
The southwesterly course of the probably pre–early Miocene and possibly Oligocene Crooked Ridge River can be traced continuously for 48 km and discontinuously for 91 km in northern Arizona (United States). The course is visible today in inverted relief. Pebbles in the river gravel came from at least as far...
Classification of freshwater ice conditions on the Alaskan Arctic Coastal Plain using ground penetrating radar and TerraSAR-X satellite data
Benjamin M. Jones, Alessio Gusmeroli, Christopher D. Arp, Tazio Strozzi, Guido Grosse, Benjamin V. Gaglioti, Matthew S. Whitman
2013, International Journal of Remote Sensing (34) 8267-8279
Arctic freshwater ecosystems have responded rapidly to climatic changes over the last half century. Lakes and rivers are experiencing a thinning of the seasonal ice cover, which may increase potential over-wintering freshwater habitat, winter water supply for industrial withdrawal, and permafrost degradation. Here, we combined the use of ground penetrating...
A model of strength
Douglas H. Johnson, R.D. Cook
2013, Science (342) 192-193
In her AAAS News & Notes piece "Can the Southwest manage its thirst?" (26 July, p. 362), K. Wren quotes Ajay Kalra, who advocates a particular method for predicting Colorado River streamflow "because it eschews complex physical climate models for a statistical data-driven modeling approach." A preference for data-driven models...
Previously unrecognized regional structure of the Coastal Belt of the Franciscan Complex, northern California, revealed by magnetic data
Victoria E. Langenheim, Robert C. Jachens, Carl M. Wentworth, Robert J. McLaughlin
2013, Geosphere (9) 1-17
Magnetic anomalies provide surprising structural detail within the previously undivided Coastal Belt, the westernmost, youngest, and least-metamorphosed part of the Franciscan Complex of northern California. Although the Coastal Belt consists almost entirely of arkosic graywacke and shale of mainly Eocene age, new detailed aeromagnetic data show that it is pervasively...
Segmenting images automatically for granulometry and sedimentology: a martian case study
Suniti Karunatillake, Scott M. McLennan, Kenneth E. Herkenhoff, Jonathan M. Husch, Craig Hardgrove, J.R. Skok
2013, Icarus 408-417
In a companion work, we bridge the gap between mature segmentation software used in terrestrial sedimentology and emergent planetary segmentation with an original algorithm optimized to segment whole images from the Microscopic Imager (MI) of the Mars Exploration Rovers (MER). In this work, we compare its semi-automated outcome with manual photoanalyses using unconsolidated...
Phylogenetic conservatism in plant phenology
T. Jonathan Davies, Elizabeth M. Wolkovich, Nathan J. B. Kraft, Nicolas Salamin, Jenica M. Allen, Toby R. Ault, Julio L. Betancourt, Kjell Bolmgren, Elsa E. Cleland, Benjamin I. Cook, Theresa M. Crimmins, Susan J. Mazer, Gregory J. McCabe, Stephanie Pau, Jim Regetz, Mark D. Schwartz, Steven E. Travers
2013, Journal of Ecology (101) 1520-1530
Phenological events – defined points in the life cycle of a plant or animal – have been regarded as highly plastic traits, reflecting flexible responses to various environmental cues. The ability of a species to track, via shifts in phenological events, the abiotic environment through time might dictate its vulnerability to...
Network modularity reveals critical scales for connectivity in ecology and evolution
Robert J. Fletcher, Andre Revell, Brian E. Reichert, Wiley M. Kitchens, J. Dixon, James D. Austin
2013, Nature Communications (4) 1-7
For nearly a century, biologists have emphasized the profound importance of spatial scale for ecology, evolution and conservation. Nonetheless, objectively identifying critical scales has proven incredibly challenging. Here we extend new techniques from physics and social sciences that estimate modularity on networks to identify critical scales for movement and gene...
Geologic history of the summit of Axial Seamount, Juan de Fuca Ridge
David A. Clague, Brian M Dreyer, Jennifer B. Paduan, Julie F Martin, William W Chadwick, David W Caress, Ryan A Portner, Thomas P. Guilderson, Mary McGann, Hans Thomas, David A Butterfield, Robert W Embley
2013, Geochemistry, Geophysics, Geosystems (14) 4403-4443
Multibeam (1 m resolution) and side scan data collected from an autonomous underwater vehicle, and lava samples, radiocarbon-dated sediment cores, and observations of flow contacts collected by remotely operated vehicle were combined to reconstruct the geologic history and flow emplacement processes on Axial Seamount's summit and upper rift...
Rates and probable causes of freshwater tidal marsh failure, Potomac River Estuary, Northern Virginia, USA
Ronald J. Litwin, Joseph P. Smoot, Milan J. Pavich, Helaine W. Markewich, Erik T. Oberg, Brent W. Steury, Ben Helwig, Vincent L. Santucci, Geoffrey Sanders
2013, Wetlands (33) 1037-1061
Dyke Marsh, a distal tidal marsh along the Potomac River estuary, is diminishing rapidly in areal extent. This study documents Dyke Marsh erosion rates from the early-1860s to the present during pre-mining, mining, and post-mining phases. From the late-1930s to the mid-1970s, Dyke Marsh and the adjacent shallow riverbottom were...
Ability of matrix models to explain the past and predict the future of plant populations.
Kathryn McEachern, Elizabeth E. Crone, Martha M. Ellis, William F. Morris, Amanda Stanley, Timothy Bell, Paulette Bierzychudek, Johan Ehrlen, Thomas N. Kaye, Tiffany M. Knight, Peter Lesica, Gerard Oostermeijer, Pedro F. Quintana-Ascencio, Tamara Ticktin, Teresa Valverde, Jennifer I. Williams, Daniel F. Doak, Rengaian Ganesan, Andrea S. Thorpe, Eric S. Menges
2013, Conservation Biology (27) 968-978
Uncertainty associated with ecological forecasts has long been recognized, but forecast accuracy is rarely quantified. We evaluated how well data on 82 populations of 20 species of plants spanning 3 continents explained and predicted plant population dynamics. We parameterized stage-based matrix models with demographic data from individually marked plants and...
Estimated global nitrogen deposition using NO2 column density
Xuehe Lu, Hong Jiang, Xiuying Zhang, Jinxun Liu, Zhen Zhang, Jiaxin Jin, Ying Wang, Jianhui Xu, Miaomiao Cheng
2013, International Journal of Remote Sensing (34) 8893-8906
Global nitrogen deposition has increased over the past 100 years. Monitoring and simulation studies of nitrogen deposition have evaluated nitrogen deposition at both the global and regional scale. With the development of remote-sensing instruments, tropospheric NO2 column density retrieved from Global Ozone Monitoring Experiment (GOME) and Scanning Imaging Absorption...
Effects of dreissenids on monitoring and management of fisheries in western Lake Erie
Martin A. Stapanian, Patrick M. Kocovsky
2013, Book chapter, Quagga and zebra mussels: biology, impacts, and control
Water clarity increased in nearshore areas of western Lake Erie by the early-1990s mainly as a result of the filtering activities of dreissenid mussels (Dreissena spp.), which invaded in the mid-1980s. We hypothesized that increased water clarity would result in greater trawl avoidance and thus reduced ability to capture fish...
