Estimating sediment budgets at the interface between rivers and estuaries with application to the Sacramento-San Joaquin River Delta
Scott Wright, David H. Schoellhamer
2005, Water Resources Research (41) 1-17
Where rivers encounter estuaries, a transition zone develops where riverine and tidal processes both affect sediment transport processes. One such transition zone is the Sacramento‐San Joaquin River Delta, a large, complex system where several rivers meet to form an estuary (San Francisco Bay). Herein we present the results of a...
A simulation test of the effectiveness of several methods for error-checking non-invasive genetic data
David A. Roon, L.P. Waits, K.C. Kendall
2005, Animal Conservation (8) 203-215
Non-invasive genetic sampling (NGS) is becoming a popular tool for population estimation. However, multiple NGS studies have demonstrated that polymerase chain reaction (PCR) genotyping errors can bias demographic estimates. These errors can be detected by comprehensive data filters such as the multiple-tubes approach, but this approach is expensive and time...
Trematodes associated with mangrove habitat in Puerto Rican salt marshes
K. D. Lafferty, R. F. Hechinger, J. Lorda, L. Soler
2005, Journal of Parasitology (91) 697-699
Batillaria minima is a common snail in the coastal estuaries of Puerto Rico. This snail is host to a variety of trematodes, the most common being Cercaria caribbea XXXI, a microphallid species that uses crabs as second intermediate hosts. The prevalence of infection was higher (7.1%) near mangroves than on...
Human land use influences chronic wasting disease prevalence in mule deer
Matthew L. Farnsworth, L.L. Wolfe, N.T. Hobbs, K.P. Burnham, E.S. Williams, D.M. Theobald, M.M. Conner, M.W. Miller
2005, Ecological Applications (15) 119-126
Human alteration of landscapes can affect the distribution, abundance, and behavior of wildlife. We explored the effects of human land use on the prevalence of chronic wasting disease (CWD) in mule deer (Odocoileus hemionus) populations residing in north-central Colorado. We chose best approximating models estimating CWD prevalence in relation to...
Distribution and density of moose in relation to landscape characteristics: Effects of scale
J.A.K. Maier, J. M. Ver Hoef, A. D. McGuire, R.T. Bowyer, L. Saperstein, H.A. Maier
2005, Conference Paper, Canadian Journal of Forest Research
We analyzed the relation between early winter distribution and density of female moose (Alces alces L.) and habitat heterogeneity in interior Alaska. We tested for effects of vegetation type, topography, distance to rivers and towns, occurrence and timing of fire, and landscape metrics. A spatial linear model was used to...
Invaders eating invaders: Exploitation of novel alien prey by the alien shimofuri goby in the San Francisco Estuary, California
S.A. Matern, L. R. Brown
2005, Biological Invasions (7) 497-507
The shimofuri goby (Tridentiger bifasciatus), which is native to Asian estuaries, was recently introduced to the San Francisco Estuary, California, USA. We conducted gut content analyses to examine the goby's feeding ecology in this highly invaded estuary. Shimofuri gobies were generalist predators on benthic invertebrates, consuming seasonally abundant prey, especially...
Palynology in coal systems analysis-The key to floras, climate, and stratigraphy of coal-forming environments
D. J. Nichols
2005, Special Paper of the Geological Society of America 51-58
Palynology can be effectively used in coal systems analysis to understand the nature of ancient coal-forming peat mires. Pollen and spores preserved in coal effectively reveal the floristic composition of mires, which differed substantially through geologic time, and contribute to determination of depositional environment and paleo- climate. Such applications are...
Technical review of the status of Northern Goshawks in the western United States
D. E. Andersen, S. DeStefano, M.I. Goldstein, K. Titus, C. Crocker-Bedford, J.J. Keane, R.G. Anthony, Robert N. Rosenfield
2005, Journal of Raptor Research (39) 192-209
The U.S. Fish and Wildlife Service (FWS) was petitioned in 1997 to consider listing Northern Goshawks (Accipiter gentilis atricapillus) under the Endangered Species Act of 1973, west of the 100th meridian of the contiguous United States. In their 12-mo finding issued in June 1998, the FWS determined that listing this...
Blind shear-wave velocity comparison of ReMi and MASW results with boreholes to 200 m in Santa Clara Valley: Implications for earthquake ground-motion assessment
W. J. Stephenson, J.N. Louie, S. Pullammanappallil, R. A. Williams, J. K. Odum
2005, Bulletin of the Seismological Society of America (95) 2506-2516
Multichannel analysis of surface waves (MASW) and refraction microtremor (ReMi) are two of the most recently developed surface acquisition techniques for determining shallow shear-wave velocity. We conducted a blind comparison of MASW and ReMi results with four boreholes logged to at least 260 m for shear velocity in Santa Clara...
Dating the growth of oceanic crust at a slow-spreading ridge
J.J. Schwartz, Barbara E. John, Michael J. Cheadle, E.A. Miranda, Craig B. Grimes, J. L. Wooden, H.J.B. Dick
2005, Science (310) 654-657
Nineteen uranium-lead zircon ages of lower crustal gabbros from Atlantis Bank, Southwest Indian Ridge, constrain the growth and construction of oceanic crust at this slow-spreading midocean ridge. Approximately 75% of the gabbros accreted within error of the predicted seafloor magnetic age, whereas ???25% are significantly older. These anomalously old samples...
Control of Tamarix in the western United States: Implications for water salvage, wildlife use, and riparian restoration
P.B. Shafroth, J.R. Cleverly, T.L. Dudley, J.P. Taylor, Charles van Riper III, E.P. Weeks, J.N. Stuart
2005, Environmental Management (35) 231-246
Non-native shrub species in the genus Tamarix (saltcedar, tamarisk) have colonized hundreds of thousands of hectares of floodplains, reservoir margins, and other wetlands in western North America. Many resource managers seek to reduce saltcedar abundance and control its spread to increase the flow of water in streams that...
Wildlife health and disease investigations
T.J. Roffe, Thierry M. Work
C.E. Braun, editor(s)
2005, Book chapter, Techniques for wildlife investigations and management
Wildlife population management requires knowledge of factors that affect population sustainability. Mortality is one of the most important of those factors. Without a clear understanding of the causes of mortality, decisions by managers of whether or how to intercede may be inappropriate. Wildlife biologists are usually the first to discover,...
Nest survival relative to patch size in a highly fragmented shortgrass prairie landscape
S. K. Skagen, A. A. Yackel Adams, R.D. Adams
2005, The Wilson Bulletin (117) 23-34
Understanding the influences of habitat fragmentation on vertebrate populations is essential for the protection and ecological restoration of strategic sites for native species. We examined the effects of prairie fragmentation on avian reproductive success using artificial and natural nests on 26 randomly selected, privately owned patches of shortgrass prairie ranging...
Genetic divergence of rabies viruses from bat species of Colorado, USA
V. Shanker, L.A. Orciari, C. De Mattos, I.V. Kuzmin, W.J. Pape, T. J. O'Shea, C. E. Rupprecht
2005, Vector-Borne and Zoonotic Diseases (5) 330-341
Molecular epidemiological studies have linked many cryptic human rabies cases in the United States with exposure to rabies virus (RV) variants associated with insectivorous bats. In Colorado, bats accounted for 98% of all reported animal rabies cases between 1977 and 1996. The genetic divergence of RV was investigated in bat...
Paleomagnetic quantification of upper-plate deformation during Miocene detachment faulting in the Mohave Mountains, Arizona
V. Pease, John W. Hillhouse, R.E. Wells
2005, Geochemistry, Geophysics, Geosystems (6)
Paleomagnetic data from Miocene (???20 Ma) volcanic rocks and dikes of west central Arizona reveal the tilt history of Proterozoic crystalline rocks in the hanging wall of the Chemehuevi-Whipple Mountains detachment fault. We obtained magnetization data from dikes and flows in two structural blocks encompassing Crossman Peak and Standard Wash...
Forecasting the evolution of seismicity in southern California: Animations built on earthquake stress transfer
S. Toda, R.S. Stein, K. Richards-Dinger, S.B. Bozkurt
2005, Journal of Geophysical Research B: Solid Earth (110) 1-17
We develop a forecast model to reproduce the distibution of main shocks, aftershocks and surrounding seismicity observed during 1986-200 in a 300 ?? 310 km area centered on the 1992 M = 7.3 Landers earthquake. To parse the catalog into frames with equal numbers of aftershocks, we animate seismicity in...
Methyl tert-butyl ether occurrence and related factors in public and private wells in southeast New Hampshire
Joseph D. Ayotte, Denise M. Argue, Frederick J. McGarry
2005, Environmental Science & Technology (39) 9-16
The occurrence of methyl tert-butyl ether (MTBE) in water from public wells in New Hampshire has increased steadily over the past several years. Using a laboratory reporting level of 0.2 μg/L, 40% of samples from public wells and 21% from private wells in southeast New Hampshire have measurable concentrations of MTBE....
Effectiveness of egg immersion in aqueous solutions of thiamine and thiamine analogs for reducing early mortality syndrome
S.B. Brown, L. R. Brown, M. Brown, K. Moore, M. Villella, J.D. Fitzsimons, B. Williston, D. C. Honeyfield, J. P. Hinterkopf, D. E. Tillitt, J.L. Zajicek, M. Wolgamood
2005, Journal of Aquatic Animal Health (17) 106-112
Protocols used for therapeutic thiamine treatments in salmonine early mortality syndrome (EMS) were investigated in lake trout Salvelinus namaycush and coho salmon Oncorhynchus kisutch to assess their efficacy. At least 500 mg of thiamine HCl/L added to egg baths was required to produce a sustained elevation of thiamine content in...
Integrated fire science in the Rocky Mountains
Natasha B. Kotliar
2005, Fact Sheet 2005-3032
Fire is an important ecological process that has helped shape western landscapes. Wildfire suppression and other management practices may have altered historic fire regimes in ecosystems adapted to frequent, low-severity fires. Compounding this problem is the encroachment of homes into fire-prone areas. Fire affects a number of abiotic and biotic components...
Fire Effects on the Point Reyes Mountain Beaver (Aplodontia rufa phaea)
Gary M. Fellers, David Pratt, Jennifer L. Griffin
2005, Book chapter, Vision Fire: Lessons Learned from the October 1995 Fire.
No abstract available at this time...
Westward expansion of the tawny-bellied cotton rat (Sigmodon fulviventer) in west-central New Mexico
Keith Geluso, J. D. Hoffman, V.A. Ashe, J.A. White, M.A. Bogan
2005, Southwestern Naturalist (50) 274-277
In New Mexico, the tawny-bellied cotton rat (Sigmodon fulviventer) previously was known only from central and southwestern parts of the state. In central New Mexico, most records were from areas of tall grass and marshes associated with the middle Rio Grande valley. In 2003, we discovered S. fulviventer in grassy...
Waterfowl distribution, movements, and habitat use relative to recent habitat changes in the Central Valley of California: A cooperative project to investigate impacts of the Central Valley Joint Venture and changing agricultural practices on the ecology of wintering waterfowl. Final Report
J. P. Fleskes, J.L. Yee, Michael L. Casazza, M. R. Miller, John Y. Takekawa, D.L. Orthmeyer
2005, Report
No abstract available at this time...
Post-Cedar Fire Arroyo Toad (Bufo californicus) Monitoring Surveys at Cuyamaca Rancho State Park, 2004. Final Report
M.B. Mendelsohn, M. C. Madden-Smith, Robert N. Fisher
2005, Report
No abstract available at this time...
Clinic and field training for desert tortoise health assessments at the Marine Corps Air Ground Combat Center, Twentynine Palms, California. May 22-28, 2004
K.H. Berry, A. Demmon
2005, Report
No abstract available at this time...
Quantile regression reveals hidden bias and uncertainty in habitat models
B.S. Cade, B.R. Noon, C.H. Flather
2005, Ecology (86) 786-800
We simulated the effects of missing information on statistical distributions of animal response that covaried with measured predictors of habitat to evaluate the utility and performance of quantile regression for providing more useful intervals of uncertainty in habitat relationships. These procedures were evaulated for conditions in which heterogeneity and hidden...
