Seismometer Self-Noise and Measuring Methods
Adam T. Ringler, R. Sleeman, Charles R. Hutt, Lind S. Gee
2014, Book chapter, Encyclopedia of Earthquake Engineering
Seismometer self-noise is usually not considered when selecting and using seismic waveform data in scientific research as it is typically assumed that the self-noise is negligibly small compared to seismic signals. However, instrumental noise is part of the noise in any seismic record, and in particular, at frequencies below a...
Modeling structured population dynamics using data from unmarked individuals
Evan H. Campbell Grant, Elise Zipkin, James T. Thorson, Kevin See, Heather J. Lynch, Yoichiro Kanno, Richard Chandler, Benjamin H. Letcher, J. Andrew Royle
2014, Ecology (95) 22-29
The study of population dynamics requires unbiased, precise estimates of abundance and vital rates that account for the demographic structure inherent in all wildlife and plant populations. Traditionally, these estimates have only been available through approaches that rely on intensive mark–recapture data. We extended recently developed N-mixture models to demonstrate how...
Stream water temperature limits occupancy of salamanders in mid-Atlantic protected areas
Evan H. Campbell Grant, Amber N. M. Wiewel, Karen C. Rice
2014, Journal of Herpetology (48) 45-50
Stream ecosystems are particularly sensitive to urbanization, and tolerance of water-quality parameters is likely important to population persistence of stream salamanders. Forecasted climate and landscape changes may lead to significant changes in stream flow, chemical composition, and temperatures in coming decades. Protected areas where landscape alterations are minimized will therefore...
Delineation of Tundra Swan Cygnus c. columbianus populations in North America: geographic boundaries and interchange
Craig R. Ely, William J.L. Sladen, Heather M. Wilson, Susan E. Savage, Kristine M. Sowl, Bill Henry, Mike Schwitters, James Snowden
2014, Wildfowl (64) 132-147
North American Tundra Swans Cygnus c. columbianus are composed of two wellrecognised populations: an Eastern Population (EP) that breeds across northern Canada and north of the Brooks Range in Alaska, which migrates to the eastern seaboard of the United States, and a Western Population (WP) that breeds in coastal regions of Alaska south of the Brooks...
Backcasting the decline of a vulnerable Great Plains reproductive ecotype: identifying threats and conservation priorities
Thomas A. Worthington, Shannon K. Brewer, Timothy B. Grabowski, Julia Mueller
2014, Global Change Biology (20) 89-102
Conservation efforts for threatened or endangered species are challenging because the multi-scale factors that relate to their decline or inhibit their recovery are often unknown. To further exacerbate matters, the perceptions associated with the mechanisms of species decline are often viewed myopically rather than across the entire species range. We...
Evidence of natural reproduction by Muskellunge in middle Tennessee rivers
Lila H. Warren, Phillip William Bettoli
2014, Southeastern Naturalist (13) 506-514
Native Esox masquinongy (Muskellunge) in the Cumberland River drainage, TN, were nearly extirpated in the 1970s due to decades of over-fishing and habitat degradation from coal mining, logging, and other land-use practices. In an effort to preserve the species in that drainage, a stocking program began in 1976 in the upper Caney...
Development of a multimetric index for fish assemblages in a cold tailwater in Tennessee
Tomas J. Ivasauskas, Phillip William Bettoli
2014, Transactions of the American Fisheries Society (143) 495-507
Tailwaters downstream of hypolimnetic-release hydropeaking dams exhibit a unique combination of stressors that affects the structure and function of resident fish assemblages. We developed a statistically and biologically defensible multimetric index of fish assemblages for the Caney Fork River below Center Hill Dam, Tennessee. Fish assemblages were sampled at five...
Post-breeding migration of Dutch-breeding black-tailed godwits: timing, routes, use of stopovers, and nonbreeding destinations
Jos C. E. W. Hooijmeijer, Nathan R. Senner, T. Lee Tibbitts, Robert E. Gill Jr., David C. Douglas, Leo W. Bruinzeel, Eddy Wymenga, Theunis Piersma
2014, Ardea (101) 141-152
Conservation of long-distance migratory shorebirds is complex because these species use habitats spread across continents and hemispheres, making identification of critical habitats and potential bottlenecks in the annual cycle especially difficult. The population of Black-tailed Godwits that breeds in Western Europe, Limosa limosa limosa, has declined precipitously over the past...
Observations from borehole dilution logging experiments in fractured crystalline rock under variable hydraulic conditions
Philip T. Harte, J. Alton Anderson, John H. Williams
2014, Conference Paper, Symposium on the application of geophysics to engineering and environmental problems 2014
Identifying hydraulically active fractures in low permeability, crystalline-bedrock aquifers requires a variety of geophysical and hydrogeophysical borehole tools and approaches. One such approach is Single Borehole Dilution Tests (SBDT), which in some low flow cases have been shown to provide greater resolution of borehole flow than other logging procedures, such...
Landscapes of Santa Rosa Island, Channel Islands National Park, California
R. Randall Schumann, Scott A. Minor, Daniel R. Muhs, Jeffery S. Pigati
2014, Book chapter, Monographs of the Western North American Naturalist
Santa Rosa Island (SRI) is the second-largest of the California Channel Islands. It is one of 4 east–west aligned islands forming the northern Channel Islands chain, and one of the 5 islands in Channel Islands National Park. The landforms, and collections of landforms called landscapes, of Santa Rosa Island have...
Productivity of functional guilds of fishes in managed wetlands in coastal South Carolina
Kelly F. Robinson, Cecil A. Jennings
2014, Journal of Fish and Wildlife Management (5) 70-86
In coastal South Carolina, many wetlands are impounded and managed as migratory waterfowl habitat. Impoundment effects on fish production and habitat quality largely are unknown. We used the size-frequency method to estimate summer production of fish guilds in three impoundments along the Combahee River, South Carolina. We predicted that guild-specific...
A comparison of resident fish assemblages in managed and unmanaged coastal wetlands in North Carolina and South Carolina
Kelly F. Robinson, Cecil A. Jennings
2014, Southeastern Naturalist (13) 237-260
The dominant fish species within impounded coastal wetlands in the southeastern US may be different from the species that dominate natural marshes. We tested the hypothesis that resident fish assemblages inhabiting impounded coastal wetlands in South Carolina would differ from resident assemblages in natural marshes of the southeastern United States....
Management and monitoring of the endangered Shenandoah salamander under climate change: Workshop report 10-12 April 2012
Evan H. Campbell Grant, John E. B. Wofford, D. R. Smith, J. Dennis, C. Hawkins-Hoffman, J. Schaberl, M. Foley, M. Bogle
2014, Natural Resource Report NPS/SHEN/NRR—2014/867
Here we report on a structured decision making (SDM) process to identify management strategies to ensure persistence of the federally endangered Shenandoah salamander (Plethodon shenandoah), given that it may be at increased extinction risk under projected climate change. The focus of this report is the second of two SDM workshops;...
Seismic evidence for a crustal magma reservoir beneath the upper east rift zone of Kilauea volcano, Hawaii
Guoqing Lin, Falk Amelung, Yan Lavallee, Paul G. Okubo
2014, Geology (42) 187-190
An anomalous body with low Vp (compressional wave velocity), low Vs (shear wave velocity), and high Vp/Vs anomalies is observed at 8–11 km depth beneath the upper east rift zone of Kilauea volcano in Hawaii by simultaneous inversion of seismic velocity structure and earthquake locations. We interpret this body to...
Experimental additions of aluminum sulfateand ammonium nitrate to in situ mesocosms toreduce cyanobacterial biovolume and microcystinconcentration
Theodore D. Harris, Frank M. Wilhelm, Jennifer L. Graham, Keith A. Loftin
2014, Lake and Reservoir Management (30) 84-93
Recent studies suggest that nitrogen additions to increase the total nitrogen:total phosphorus (TN:TP) ratio may reduce cyanobacterial biovolume and microcystin concentration in reservoirs. In systems where TP is >100 μg/L, however, nitrogen additions to increase the TN:TP ratio could cause ammonia, nitrate, or nitrite toxicity to terrestrial and aquatic organisms. Reducing phosphorus via...
Quantifying spatial scaling patterns and their local and regional correlates in headwater streams: Implications for resilience
Emma Gothe, Leonard Sandin, Craig R. Allen, David G. Angeler
2014, Ecology and Society (19)
The distribution of functional traits within and across spatiotemporal scales has been used to quantify and infer the relative resilience across ecosystems. We use explicit spatial modeling to evaluate within- and cross-scale redundancy in headwater streams, an ecosystem type with a hierarchical and dendritic network structure. We assessed the cross-scale...
Pb-Sr-Nd-O isotopic characterization of Mesozoic rocks throughout the northern end of the Peninsular Ranges batholith: Isotopic evidence for the magmatic evolution of oceanic arc–continental margin accretion during the Late Cretaceous of southern California
Ronald W. Kistler, Joseph L. Wooden, Wayne R. Premo, Douglas M. Morton
2014, Book chapter, Peninsular ranges Batholith, Baja California and southern California: Geological Society of America Memoir 211
Within the duration of the U.S. Geological Survey (USGS)–based Southern California Areal Mapping Project (SCAMP), many samples from the northern Peninsular Ranges batholith were studied for their whole-rock radioisotopic systematics (rubidium-strontium [Rb-Sr], uranium-thorium-lead [U-Th-Pb], and samarium-neodymium [Sm-Nd]), as well as oxygen (O), a stable isotope. The results of three main...
Geochemistry of a marine phosphate deposit: A signpost to phosphogenesis
David Z. Piper, R.B. Perkins
2014, Book chapter, Treatise on geochemistry
The Permian age Phosphoria Formation in southeastern Idaho and adjoining states represents possibly the largest marine phosphate deposit in the world. The Meade Peak Member, which contains the highest concentrations and amount of carbonate fluorapatite in the formation, was not significantly altered by mechanical reworking during deposition or subsequently by...
Landsat Science Team meeting — First Landsat 8 evaluations
Thomas R. Loveland, Michael A. Wulder, James R. Irons
2014, The Earth Observer (26) 24-28
The U.S. Geological Survey (USGS)-NASA Landsat Science Team (LST) met at the USGS’ Earth Resources Observation and Science (EROS) Center near Sioux Falls, SD, from October 29-31, 2013. All meeting presentations can be downloaded from landsat.usgs.gov/science_LST_October_29_31_2013.php....
Evaluation and prioritization of stream habitat monitoring in the Lower Columbia Salmon and Steelhead Recovery Domain as related to the habitat monitoring needs of ESA recovery plans
Amy L. Puls, Kara Anlauf Dunn, Bernadette Graham Hudson
2014, Report
The lower Columbia River and its tributaries once supported abundant runs of salmon and steelhead; however, there are five species currently listed under the federal Endangered Species Act (ESA). The National Marine Fisheries Service has completed, and is proposing for adoption, a comprehensive ESA Recovery Plan for the Lower Columbia...
Application of hydrologic tools and monitoring to support managed aquifer recharge decision making in the Upper San Pedro River, Arizona, USA
Laurel J. Lacher, Dale S. Turner, Bruce Gungle, Brooke M. Bushman, Holly E. Richter
2014, Water (6) 3495-3527
The San Pedro River originates in Sonora, Mexico, and flows north through Arizona, USA, to its confluence with the Gila River. The 92-km Upper San Pedro River is characterized by interrupted perennial flow, and serves as a vital wildlife corridor through this semiarid to arid region. Over the past century,...
Age and isotopic systematics of Cretaceous borehole and surface samples from the greater Los Angeles Basin region: Implications for the types of crust that might underlie Los Angeles and their distribution along late Cenozoic fault systems
Wayne R. Premo, Douglas M. Morton, Ronald W. Kistler
2014, Book chapter, Peninsular ranges Batholith, Baja California and southern California: Geological Society of America Memoir 211
Nine U-Pb zircon ages were determined on plutonic rocks sampled from surface outcrops and rock chips of drill core from boreholes within the greater Los Angeles Basin region. In addition, lead-strontium-neodymium (Pb-Sr-Nd) whole-rock isotopic data were obtained for eight of these samples. These results help to characterize the crystalline basement...
Using spatial resampling to assess redd count survey length requirements for Pacific Lamprey
M.P. Mayfield, L. D. Schultz, Lance A. Wyss, M.E. Colvin, Carl B. Schreck
2014, North American Journal of Fisheries Management (34) 923-931
Pacific Lamprey Entosphenus tridentatus has declined across its range along the West Coast of North America, and an understanding of all life history phases is needed to address population recovery. Spawning surveys (redd counts) are common tools currently used to monitor returning adult salmonids, but such methodologies are in their infancy for...
Linking successful careers to successful fisheries
Charles F. Rabeni, Shannon K. Brewer
2014, Book chapter, Future of fisheries: Perspectives for emerging professionals
No abstract available....
SHRIMP-RG U-Pb ages of provenance and metamorphism from detrital zircon populations and Pb-Sr-Nd signatures of prebatholithic metasedimentary rocks at Searl Ridge, northern Peninsular Ranges batholith, southern California: Implications for their age, origin, and tectonic setting
Wayne R. Premo, Douglas M. Morton
2014, Book chapter, Peninsular ranges Batholith, Baja California and southern California: Geological Society of America Memoir 211
Twenty-four samples were collected from prebatholithic metasedimentary rocks along Searl Ridge, the north rim of the Diamond Valley Reservoir, Domenigoni Valley, centrally located in the northern Peninsular Ranges of southern California. These rocks exhibit progressive metamorphism from west to east across fundamental structural discontinuities now referred to as a “transition...
