New geographic records of Hamlets, Hypoplectrus spp. (Serranidae), in the Caribbean Sea
Ernest H. Williams Jr., Lucy Bunkley-Williams, Caroline S. Rogers, Robert Fenner
2006, Revista de Biología Tropical: International Journal of Tropical Biology and Conservation (54) 171-173
The exact number of species of hamlets, Hypoplectrus spp., in the Caribbean is controversial and the geographic distributions of these species/forms are poorly documented. We report Curaçao, Netherlands Antilles, as a new locality for the Barred Hamlet, H. puella (Cuvier), and Shy Hamlet, H. guttavarius (Poey); and St. John and St. Thomas, U.S. Virgin Islands, for...
Holocene environmental and parasequence development of the St. Jones Estuary, Delaware (USA): Foraminiferal proxies of natural climatic and anthropogenic change
E. Leorri, R. Martin, P. McLaughlin
2006, Palaeogeography, Palaeoclimatology, Palaeoecology (241) 590-607
The benthic foraminiferal record of marshes located along western Delaware Bay (St. Jones Estuary, USA) reflects the response of estuaries to sea-level and paleoclimate change during the Holocene. System tracts are recognized and within them parasequences based on sedimentological and foraminiferal assemblages identification. The parasequences defined by foraminiferal assemblages appear...
Surface slip associated with the 2004 Parkfield, California, earthquake measured on alinement arrays
J. J. Lienkaemper, B. Baker, F.S. McFarland
2006, Bulletin of the Seismological Society of America (96)
Although still continuing, surface slip from the 2004 Parkfield earth-quake as measured on alinement arrays appears to be approaching about 30-35 cm between Parkfield and Gold Hill. This includes slip along the main trace and the Southwest Fracture Zone (SWFZ). Slip here was higher in 1966 at about 40 cm....
Development of spatially diverse and complex dune-field patterns: Gran Desierto Dune Field, Sonora, Mexico
C. Beveridge, G. Kocurek, R.C. Ewing, N. Lancaster, P. Morthekai, A.K. Singhvi, S. A. Mahan
2006, Sedimentology (53) 1391-1409
The pattern of dunes within the Gran Desierto of Sonora, Mexico, is both spatially diverse and complex. Identification of the pattern components from remote-sensing images, combined with statistical analysis of their measured parameters demonstrate that the composite pattern consists of separate populations of simple dune patterns. Age-bracketing by optically stimulated...
Integrated biostratigraphy of foraminifers, radiolarians and conodonts in shallow and deep water Middle Permian (Capitanian) deposits of the "Rader slide", Guadalupe Mountains, West Texas
M.K. Nestell, G.P. Nestell, B. R. Wardlaw, M.J. Sweatt
2006, Stratigraphy (3) 161-194
A diverse assemblage of microfossils is present in a 6m thick sequence of three debris flow deposits interbedded with thin turbidite limestone beds and fine grained siliciclastics exposed above the megaconglomerate in a section (known as the "Rader Slide" in numerous guidebook stops) of the Rader Limestone Member of the...
Mercury in water and biomass of microbial communities in hot springs of Yellowstone National Park, USA
S.A. King, S. Behnke, K. Slack, D. P. Krabbenhoft, D. Kirk Nordstrom, M.D. Burr, Robert G. Striegl
2006, Applied Geochemistry (21) 1868-1879
Ultra-clean sampling methods and approaches typically used in pristine environments were applied to quantify concentrations of Hg species in water and microbial biomass from hot springs of Yellowstone National Park, features that are geologically enriched with Hg. Microbial populations of chemically-diverse hot springs were also characterized using modern methods in...
Seasonal and spatial patterns of metals at a restored copper mine site. I. Stream copper and zinc
D.G. Bambic, Charles N. Alpers, P.G. Green, E. Fanelli, W.K. Silk
2006, Environmental Pollution (144) 774-782
Seasonal and spatial variations in metal concentrations and pH were found in a stream at a restored copper mine site located near a massive sulfide deposit in the Foothill copper-zinc belt of the Sierra Nevada, California. At the mouth of the stream, copper concentrations increased and pH decreased with increased...
The effects of wetland habitat structure on Florida apple snail density
L.B. Karunaratne, P.C. Darby, R.E. Bennetts
2006, Wetlands (26) 1143-1150
Wetlands often support a variety of juxtaposed habitat patches (e.g., grass-, shrub- or tree-dominated) differentially suited to support the inhabiting fauna. The proportion of available habitat types has been affected by human activity and consequently has contributed to degrading habitat quality for some species. The Florida apple snail (Pomacea paludosa)...
Phylogeography and spatial genetic structure of the Southern torrent salamander: Implications for conservation and management
M.P. Miller, S. M. Haig, R.S. Wagner
2006, Journal of Heredity (97) 561-570
The Southern torrent salamander (Rhyacotriton variegatus) was recently found not warranted for listing under the US Endangered Species Act due to lack of information regarding population fragmentation and gene flow. Found in small-order streams associated with late-successional coniferous forests of the US Pacific Northwest, threats to their persistence include disturbance...
Uranium-series constraints on subrepository water flow at yucca mountain, nevada
L.A. Neymark, S.J. Chipera, J.B. Paces, D. T. Vaniman
2006, Conference Paper, Proceedings of the 11th International High Level Radioactive Waste Management Conference, IHLRWM
Mineral abundances and whole-rock chemical and uranium-series isotopic compositions were measured in unfractured and rubble core samples from borehole USW SD-9 in the same layers of variably zeolitized tuffs that underlie the proposed nuclear waste repository at Yucca Mountain, Nevada. Uranium concentrations and isotopic compositions also were measured in pore...
Stable isotopic composition of chlorine and oxygen in synthetic and natural perchlorate
Neil C. Sturchio, J.K. Bohlke, Baohua Gu, Juske Horita, Gilbert M. Brown, Abelardo D. Beloso Jr., Leslie J. Patterson, Paul B. Hatzinger, W. Andrew Jackson, Jacimaria Batista
Baohua Gu, John D. Coates, editor(s)
2006, Book chapter, Perchlorate: Environmental occurrence, interactions and treatment
No abstract available....
Isotopic evidence of nitrate sources and denitrification in the Mississippi River, Illinois
S.V. Panno, Keith C. Hackley, W.R. Kelly, H.-H. Hwang
2006, Journal of Environmental Quality (35) 495-504
Anthropogenic nitrate (NO3-) within the Mississippi-Atchafalaya River basin and discharge to the Gulf of Mexico has been linked to serious environmental problems. The sources of this NO 3- have been estimated by others using mass balance methods; however, there is considerable uncertainty in these estimates. Part of the uncertainty is...
Phylogeography, phylogeny and hybridization in trichechid sirenians: Implications for manatee conservation
J. A. Vianna, Robert K. Bonde, S. Caballero, J. P. Giraldo, R. P. Lima, A. Clark, M. Marmontel, B. Morales-Vela, M. J. De Souza, L. Parr, M. A. Rodriguez-Lopez, A. A. Mignucci-Giannoni, J. A. Powell, F. R. Santos
2006, Molecular Ecology (15) 433-447
The three living species of manatees, West Indian (Trichechus manatus), Amazonian (Trichechus inunguis) and West African (Trichechus senegalensis), are distributed across the shallow tropical and subtropical waters of America and the western coast of Africa. We have sequenced the mitochondrial DNA control region in 330 Trichechus to compare their phylogeographic patterns. In T. manatus we...
Antarctic climate cooling and response of diatoms in glacial meltwater streams
R.M.M. Esposito, S.L. Horn, Diane M. McKnight, M.J. Cox, M.C. Grant, S. A. Spaulding, P.T. Doran, K.D. Cozzetto
2006, Geophysical Research Letters (33)
To understand biotic responses to an Antarctic cooling trend diatom samples from glacial meltwater streams in the McMurdo Dry Valleys, the largest ice-free area in Antarctica. Diatoms are abundant in these streams, and 24 of 40 species have only been found in the Antarctic. The percentage of these Antarctic diatom...
Territoriality, site fidelity, and survivorship of willow flycatchers wintering in Costa Rica
T. J. Koronkiewicz, M. K. Sogge, Charles van Riper III, E. H. Paxton
2006, The Condor (108) 558-570
We studied wintering Willow Flycatchers (Empidonax traillii) in two seasonal freshwater wetland habitats in northwestern Costa Rica during five boreal winters, to determine habitat occupancy, overwinter and between-year site and territory fidelity, and the degree to which the sexes maintain and defend winter territories. Both males and females used agonistic...
Mineral of the month: dimension stone
Thomas Dolley
2006, Geotimes (2006)
No abstract available...
Predator functional response and prey survival: Direct and indirect interactions affecting a marked prey population
David A. Miller, J.B. Grand, T.F. Fondell, M. Anthony
2006, Journal of Animal Ecology (75) 101-110
1. Predation plays an integral role in many community interactions, with the number of predators and the rate at which they consume prey (i.e. their functional response) determining interaction strengths. Owing to the difficulty of directly observing predation events, attempts to determine the functional response of predators in natural systems...
Structure of the San Andreas fault zone at SAFOD from a seismic refraction survey
J.A. Hole, T. Ryberg, G. S. Fuis, F. Bleibinhaus, A.K. Sharma
2006, Geophysical Research Letters (33)
Refraction traveltimes from a 46-km long seismic survey across the San Andreas Fault were inverted to obtain two-dimensional velocity structure of the upper crust near the SAFOD drilling project. The model contains strong vertical and lateral velocity variations from <2 km/s to ???6 km/s. The Salinian terrane west of the...
Effects of fire on plant communities
M.L. Brooks
2006, Book chapter, The Use of Fire as a Tool for Controlling Invasive Plants: Cal-IPC Publication 2006-01
No abstract available at this time...
High-resolution stratigraphy of a Mississippi subdelta-lobe progradation in the Barataria Bight, north-central Gulf of Mexico
J. G. Flocks, N.F. Ferina, C. Dreher, J. L. Kindinger, D. M. FitzGerald, M.A. Kulp
2006, Journal of Sedimentary Research (76) 429-443
The coastal zone of southeastern Louisiana is the product of numerous cycles of progradation, abandonment, and marine transgression of the Mississippi River delta. Currently, the shoreline in the Barataria Bight is undergoing significant erosion and retreat, and understanding its evolution is crucial in stabilization efforts. This study uses an extensive...
Mineral resource of the month: mercury
William E. Brooks
2006, Geotimes (2006)
The ore of mercury, cinnabar, is soft and dark red, and native mercury is one of a few metals that is liquid at room temperatures. Cinnabar from Almaden, Spain, the world’s oldest producing mercury mine, was used during Roman times, and the chemical symbol for mercury (Hg) is from "hydrargyrum,"...
San Francisco 's Golden Gate: A bridge between historically distinct coyote (Canis latrans) populations?
Benjamin N. Sacks, Holly B. Ernest, Erin E. Boydston
2006, Western North American Naturalist (66) 263-264
Although coyotes (Canis latrans) are well-known for their adaptability to human-modified landscapes (Riley et al. 2003), as with any medium to large-sized carnivore, they typically avoid highly urbanized areas (Crooks 2002), preferring instead to use habitat fragments linked by vegetated corridors (Tigas et al. 2002). However, recent observations...
Mineral resource of the month: barite
M. Michael Miller
2006, Geotimes (2006)
Also called barytes, barite forms in various geologic environments and is frequently found with both metallic and nonmetallic minerals. Most barite is produced by open-pit mining techniques, and most crude barite requires some upgrading to meet minimum purity or specific gravity levels....
Spatial and temporal variation in sea otter demography
M. Tim Tinker, Daniel F. Doak, James A. Estes, Brian B. Hatfield, Michelle M. Steadler, James L. Bodkin
M. Tim Tinker, James A. Estes, Katherine Ralls, Terrie M. Williams, David A. Jessup, Daniel P. Costa, editor(s)
2006, Book chapter, Population dynamics and biology of the California sea otter (<i>Enhydra lutris nereis</i>) at the southern end of its range
1) Better information on historical and current population dynamics is central to understanding patterns of growth and decline in the California sea otter population. We developed a maximum likelihood-based analytical method to estimate historical age/sex specific vital rates as well as spatial and temporal variation in vital rates from longitudinal...
Foraging ecology
M. Tim Tinker, James A. Estes, Michelle Staedler, James L. Bodkin
M. Tim Tinker, James A. Estes, Katherine Ralls, Terrie M. Williams, David A. Jessup, Daniel P. Costa, editor(s)
2006, Book chapter, Population dynamics and biology of the California sea otter (<i>Enhydra lutris nereis</i>) at the southern end of its range
Longitudinal foraging data collected from 60 sea otters implanted with VHF radio transmitters at two study sites in Central California over a three-year period demonstrated even greater individual dietary specialization than in previous studies, with only 54% dietary overlap between individuals and the population.Multivariate statistical analyses indicated that individual diets...
