Beach morphology and change along the mixed grain-size delta of the dammed Elwha River, Washington
J.A. Warrick, D.A. George, G. Gelfenbaum, P. Ruggiero, G. M. Kaminsky, M. Beirne
2009, Geomorphology (111) 136-148
Sediment supply provides a fundamental control on the morphology of river deltas, and humans have significantly modified these supplies for centuries. Here we examine the effects of almost a century of sediment supply reduction from the damming of the Elwha River in Washington on shoreline position and beach morphology of...
Threatened fishes of the world: Moapa coriacea Hubbs and Miller, 1948 (cyprinidae)
G.G. Scoppettone, S. Goodchild
2009, Environmental Biology of Fishes (86) 339-340
Moapa dace. Conservation status: Endangered (U.S. Department of the Interior 1967), Critically Endangered, IUCN (Gimenez 1996). Identification: Small embedded scales, narrow caudal peduncle and a bright black spot at the base of deeply forked tail. Pharyngeal...
Heritage strain and diet of wild young of year and yearling lake trout in the main basin of Lake Huron
E.F. Roseman, W. Stott, T. P. O’Brien, S.C. Riley, J.S. Schaeffer
2009, Journal of Great Lakes Research (35) 620-626
Restoration of lake trout Salvelinus namaycush stocks in Lake Huron is a fish community objective developed to promote sustainable fish communities in the lake. Between 1985 and 2004, 12.65 million lake trout were stocked into Lake Huron representing eight different genetic strains. Collections of bona fide wild fish in USGS...
Shifts in lake N: P stoichiometry and nutrient limitation driven by atmospheric nitrogen deposition
J.J. Elser, T. Andersen, Jill Baron, A.-K. Bergstrom, M. Jansson, M. Kyle, K. R. Nydick, L. Steger, D.O. Hessen
2009, Science (326) 835-837
Human activities have more than doubled the amount of nitrogen (N) circulating in the biosphere. One major pathway of this anthropogenic N input into ecosystems has been increased regional deposition from the atmosphere. Here we show that atmospheric N deposition increased the stoichiometric ratio of N and phosphorus (P) in...
Identification of hydrated silicate minerals on Mars using MRO-CRISM: Geologic context near Nili Fossae and implications for aqueous alteration
B.L. Ehlmann, J.F. Mustard, G.A. Swayze, R. N. Clark, J.L. Bishop, F. Poulet, D.J. Des Marais, L.H. Roach, R.E. Milliken, J.J. Wray, O. Barnouin-Jha, S.L. Murchie
2009, Journal of Geophysical Research E: Planets (114)
[1] The Noachian terrain west of the Isidis basin hosts a diverse collection of alteration minerals in rocks comprising varied geomorphic units within a 100,000 km2 region in and near the Nili Fossae. Prior investigations in this region by the Observatoire pour l'Minéralogie, l'Eau, les Glaces,...
Evolution and preservation potential of fluvial and transgressive deposits on the Louisiana inner shelf: Understanding depositional processes to support coastal management
J. Flocks, M.D. Miner, D.C. Twichell, D. L. Lavoie, J. Kindinger
2009, Geo-Marine Letters (29) 359-378
The barrier-island systems of the Mississippi River Delta plain are currently undergoing some of the highest rates of shoreline retreat in North America (~20 m/year). Effective management of this coastal area requires an understanding of the processes involved in shoreline erosion and measures that can be...
Evidence of multidecadal climate variability and the Atlantic Multidecadal Oscillation from a Gulf of Mexico sea-surface temperature-proxy record
R.Z. Poore, K. L. DeLong, J.N. Richey, T. M. Quinn
2009, Geo-Marine Letters (29) 477-484
A comparison of a Mg/Ca-based sea-surface temperature (SST)-anomaly record from the northern Gulf of Mexico, a calculated index of variability in observed North Atlantic SST known as the Atlantic Multidecadal Oscillation (AMO), and a tree-ring reconstruction of the AMO contain similar patterns of variation over the last 110 years. Thus,...
Backcountry recreation site and trail conditions: Haleakala National Park final report, May 2009
Jeffrey L. Marion, C. Carr
2009, Report
No abstract available....
Constraints on the depth of generation and emplacement of a magmatic epidote-bearing quartz diorite pluton in the Coast Plutonic Complex, British Columbia
J.M. Chang, C.L. Andronicos
2009, Terra Nova (21) 480-488
Petrology and P–T estimates indicate that a magmatic epidote-bearing quartz diorite pluton from Mt. Gamsby, Coast Plutonic Complex, British Columbia, was sourced at pressures below ∼1.4 GPa and cooled nearly isobarically at ∼0.9 GPa. The P–T path indicates that the magma was within the stability field of magmatic epidote...
Introduction to "northern Gulf of Mexico ecosystem change and hazards susceptibility"
John C. Brock, Dawn L. Lavoie, Richard Z. Poore
2009, Geo-Marine Letters (29) 343-347
The northern Gulf of Mexico and its diverse natural resources are threatened by population and development pressure, and by the impacts of rising sea level and severe storms. In the wake of the devastating 2005 hurricane season, and in response to the complex management issues facing the region, the U.S....
Comparative endocrinology in the 21st century
R.J. Denver, P.M. Hopkins, S. D. McCormick, C.R. Propper, L. Riddiford, S.A. Sower, J.C. Wingfield
2009, Integrative and Comparative Biology (49) 339-348
Hormones coordinate developmental, physiological, and behavioral processes within and between all living organisms. They orchestrate and shape organogenesis from early in development, regulate the acquisition, assimilation, and utilization of nutrients to support growth and metabolism, control gamete production and sexual behavior, mediate organismal responses to environmental change, and allow for...
Transient dwarfism of soil fauna during the Paleocene-Eocene Thermal Maximum
J.J. Smith, S.T. Hasiotis, M. J. Kraus, D.T. Woody
2009, Proceedings of the National Academy of Sciences of the United States of America (106) 17655-17660
Soil organisms, as recorded by trace fossils in paleosols of the Willwood Formation, Wyoming, show significant body-size reductions and increased abundances during the Paleocene-Eocene Thermal Maximum (PETM). Paleobotanical, paleopedologic, and oxygen isotope studies indicate high temperatures during the PETM and sharp declines in precipitation compared with late Paleocene estimates. Insect...
A case study of two M~5 mainshocks in Anza, California: Is the footprint of an aftershock sequence larger than we think?
Karen R. Fritts, Debi Kilb
2009, Bulletin of the Seismological Society of America (99) 2721-2735
It has been traditionally held that aftershocks occur within one to two fault lengths of the mainshock. Here we demonstrate that this perception has been shaped by the sensitivity of seismic networks. The 31 October 2001 Mw 5.0 and 12 June 2005 Mw 5.2 Anza mainshocks in southern California occurred in the middle of...
Seismic analysis of clinoform depositional sequences and shelf-margin trajectories in Lower Cretaceous (Albian) strata, Alaska North Slope
David W. Houseknecht, Kenneth J. Bird, Christopher J. Schenk
2009, Basin Research (21) 644-654
Lower Cretaceous strata beneath the Alaska North Slope include clinoform depositional sequences that filled the western Colville foreland basin and overstepped the Beaufort rift shoulder. Analysis of Albian clinoform sequences with two‐dimensional (2D) seismic data resulted in the recognition of seismic facies inferred to represent lowstand, transgressive and highstand systems...
In-Flight performance of MESSENGER's Mercury dual imaging system
S.E. Hawkins, S.L. Murchie, K.J. Becker, C.M. Selby, F.S. Turner, M.W. Noble, N.L. Chabot, T.H. Choo, E.H. Darlington, B.W. Denevi, D.L. Domingue, C.M. Ernst, G.M. Holsclaw, N.R. Laslo, W.E. Mcclintock, L.M. Prockter, M.S. Robinson, S.C. Solomon, R.E. Sterner
2009, Conference Paper, Proceedings of SPIE - The International Society for Optical Engineering
The Mercury Surface, Space ENvironment, GEochemistry, and Ranging (MESSENGER) spacecraft, launched in August 2004 and planned for insertion into orbit around Mercury in 2011, has already completed two flybys of the innermost planet. The Mercury Dual Imaging System (MDIS) acquired nearly 2500 images from the first two flybys and viewed...
Multiple dendrochronological responses to the eruption of Cinder Cone, Lassen Volcanic National Park, California
P.R. Sheppard, M.H. Ort, K.C. Anderson, M.A. Clynne, E.M. May
2009, Dendrochronologia (27) 213-221
Two dendrochronological properties – ring width and ring chemistry – were investigated in trees near Cinder Cone in Lassen Volcanic National Park, northeastern California, for the purpose of re-evaluating the date of its eruption. Cinder Cone is thought to have erupted in AD 1666 based on ring-width evidence, but interpreting...
Biodegradation of 17β-estradiol, estrone, and testosterone in stream sediments
P. M. Bradley, F. H. Chapelle, L. B. Barber, P.B. McMahon, J.L. Gray, D.W. Kolpin
2009, Conference Paper, In Situ and On-Site Bioremediation-2009: Proceedings of the 10th International In Situ and On-Site Bioremediation Symposium
The release of endocrine-disrupting chemicals (EDCs) in wastewater treatment plant (WWTP) effluent poses a significant threat to the ecology of surface water receptors, due to impacts on the hormonal control, sexual development, reproductive success and community structure of the indigenous aquatic organisms and associated wildlife. Among the EDCs commonly observed...
Geology and geochemistry of the Mammoth breccia pipe, Copper Creek mining district, southeastern Arizona: Evidence for a magmatic-hydrothermal origin
E. D. Anderson, William W. Atkinson Jr., T. Marsh, A. Iriondo
2009, Mineralium Deposita (44) 151-170
The Copper Creek mining district, southeastern Arizona, contains more than 500 mineralized breccia pipes, buried porphyry-style, copper-bearing stockworks, and distal lead-silver veins. The breccia pipes are hosted by the Copper Creek Granodiorite and the Glory Hole volcanic rocks. The unexposed Mammoth breccia pipe, solely recognized by drilling, has a vertical...
An integrated approach to assess broad-scale condition of coastal wetlands - The Gulf of Mexico Coastal Wetlands pilot survey
J.A. Nestlerode, V.D. Engle, P. Bourgeois, P.T. Heitmuller, J.M. Macauley, Y.C. Allen
2009, Conference Paper, Environmental Monitoring and Assessment
The Environmental Protection Agency (EPA) and U.S. Geological Survey (USGS) initiated a two-year regional pilot survey in 2007 to develop, test, and validate tools and approaches to assess the condition of northern Gulf of Mexico (GOM) coastal wetlands. Sampling sites were selected from estuarine and palustrine wetland areas with herbaceous,...
Characterization of the interferon genes in homozygous rainbow trout reveals two novel genes, alternate splicing and differential regulation of duplicated genes
M. K. Purcell, K.J. Laing, J.C. Woodson, G.H. Thorgaard, J.D. Hansen
2009, Fish and Shellfish Immunology (26) 293-304
The genes encoding the type I and type II interferons (IFNs) have previously been identified in rainbow trout and their proteins partially characterized. These previous studies reported a single type II IFN (rtIFN-??) and three rainbow trout type I IFN genes that are classified into either group I (rtIFN1, rtIFN2)...
Mapping of hazard from rainfall-triggered landslides in developing countries: Examples from Honduras and Micronesia
E. L. Harp, M.E. Reid, J.P. McKenna, J. A. Michael
2009, Engineering Geology (104) 295-311
Loss of life and property caused by landslides triggered by extreme rainfall events demonstrates the need for landslide-hazard assessment in developing countries where recovery from such events often exceeds the country's resources. Mapping landslide hazards in developing countries where the need for landslide-hazard mitigation is great but the resources are...
Post-breeding season distribution of black-footed and Laysan albatrosses satellite-tagged in Alaska: Inter-specific differences in spatial overlap with North Pacific fisheries
K.N. Fischer, R.M. Suryan, D.D. Roby, G.R. Balogh
2009, Biological Conservation (142) 751-760
We integrated satellite-tracking data from black-footed albatrosses (Phoebastria nigripes; n = 7) and Laysan albatrosses captured in Alaska (Phoebastria immutabilis; n = 18) with data on fishing effort and distribution from commercial fisheries in the North Pacific in order to assess potential risk from bycatch. Albatrosses were satellite-tagged at-sea in...
USGS: Science at the intersection of land and ocean
M.D. Myers
2009, Sea Technology (50) 18-21
The US Geological Survey (USGS) conducts an ongoing national assessment of coastal change hazards in order to help protect lives and support management of coastal infrastructure and resources. The research group rapidly gathers to investigate coastal changes along the Gulf Coast's sandy beaches after each hurricane to examine the magnitude...
Titan's surface at 2.2-cm wavelength imaged by the Cassini RADAR radiometer: Calibration and first results
M.A. Janssen, R. D. Lorenz, R. West, F. Paganelli, R.M. Lopes, R. L. Kirk, C. Elachi, S. D. Wall, W.T.K. Johnson, Y. Anderson, R.A. Boehmer, P. Callahan, Y. Gim, G.A. Hamilton, K.D. Kelleher, L. Roth, B. Stiles, Gall A. Le
2009, Icarus (200) 222-239
The first comprehensive calibration and mapping of the thermal microwave emission from Titan's surface is reported based on radiometric data obtained at 2.2-cm wavelength by the passive radiometer included in the Cassini Radar instrument. The data reported were accumulated from 69 separate observational segments in Titan passes from Ta (October...
Plant response to nutrient availability across variable bedrock geologies
S.C. Castle, J. C. Neff
2009, Ecosystems (12) 101-113
We investigated the role of rock-derived mineral nutrient availability on the nutrient dynamics of overlying forest communities (Populus tremuloides and Picea engelmanni-Abies lasiocarpa v. arizonica) across three parent materials (andesite, limestone, and sandstone) in the southern Rocky Mountains of Colorado. Broad geochemical differences were observed between bedrock materials; however, bulk...
