A biophysical model of Lake Erie walleye (Sander vitreus) explains interannual variations in recruitment
Yingming Zhao, Michael L. Jones, Brian J. Shuter, Edward F. Roseman
2009, Canadian Journal of Fisheries and Aquatic Sciences (66) 114-125
We used a three-dimensional coupled hydrodynamic-ecological model to investigate how lake currents can affect walleye (Sander vitreus) recruitment in western Lake Erie. Four years were selected based on a fall recruitment index: two high recruitment years (i.e., 1996 and 1999) and two low recruitment years (i.e., 1995 and 1998). During...
Using drift nets to capture early life stages and monitor spawning of the yangtze river chinese sturgeon (Acipenser sinensis)
Q.W. Wei, B. Kynard, D.G. Yang, X.H. Chen, H. Du, L. Shen, H. Zhang
2009, Conference Paper, Journal of Applied Ichthyology
A sampling system for capturing sturgeon eggs using a D-shaped bottom anchored drift net was used to capture early life stages (ELS) of Chinese sturgeon, Acipenser sinensis, and monitor annual spawning success at Yichang on the Yangtze River, 1996-2004, before and just after the Three Gorges Dam began operation. Captured...
A search in strainmeter data for slow slip associated with triggered and ambient tremor near Parkfield, California
E.F. Smith, J. Gomberg
2009, Journal of Geophysical Research B: Solid Earth (114)
We test the hypothesis that, as in subduction zones, slow slip facilitates triggered and ambient tremor in the transform boundary setting of California. Our study builds on the study of Peng et al. (2009) of triggered and ambient tremor near Parkfield, California during time intervals surrounding 31, potentially triggering, M...
THE subfossil occurrence and paleoecological significance of small mammals at ankilitelo cave, southwestern Madagascar
K.M. Muldoon, D. D. De Blieux, E.L. Simons, P.S. Chatrath
2009, Journal of Mammalogy (90) 1111-1131
Small mammals are rarely reported from subfossil sites in Madagascar despite their importance for paleoenvironmental reconstruction, especially as it relates to recent ecological changes on the island. We describe the uniquely rich subfossil small mammal fauna from Ankilitelo Cave, southwestern Madagascar. The Ankilitelo fauna is dated to the late...
Warmwater fish in wadeable streams
Charles F. Rabeni, John J. Lyons, Norman Mercado-Silva, James T. Peterson
Scott A. Bonar, Wayne A. Hubert, David W. Willis, editor(s)
2009, Book chapter, Standard methods for sampling North American freshwater fishes
Both “warmwater” and “wadeable” are terms of convenience without precise definition and are used by biologists to describe streams that are generally too warm to have sustainable salmonid populations and can be safely traversed by walking (i.e., a section of stream should have the majority of its length less than...
Wild felids as hosts for human plague, Western United States
S.N. Bevins, J.A. Tracey, S.P. Franklin, V.L. Schmit, M.L. MacMillan, K.L. Gage, M.E. Schriefer, K.A. Logan, L.L. Sweanor, M.W. Alldredge, C. Krumm, W.M. Boyce, W. Vickers, S.P.D. Riley, L.M. Lyren, E. E. Boydston, Robert N. Fisher, M.E. Roelke, M. Salman, K.R. Crooks, S. VandeWoude
2009, Emerging Infectious Diseases (15) 2021-2024
Plague seroprevalence was estimated in populations pumas and bobcats in the western United States. High levels of exposure in plague-endemic regions indicate the need to consider the ecology and pathobiology of plague nondomestic felid hosts to better understand the role of these species in disease persistence and transmission....
Legacy effects of colonial millponds on floodplain sedimentation, bank erosion, and channel morphology, MID-Atlantic, USA
E.R. Schenk, C.R. Hupp
2009, Journal of the American Water Resources Association (45) 597-606
Many rivers and streams of the Mid-Atlantic Region, United States (U.S.) have been altered by postcolonial floodplain sedimentation (legacy sediment) associated with numerous milldams. Little Conestoga Creek, Pennsylvania, a tributary to the Susquehanna River and the Chesapeake Bay, is one of these streams. Floodplain sedimentation rates, bank erosion rates, and...
Ground settlement monitoring from temporarily persistent scatterers between two SAR acquisitions
Z. Lei, D. Xiaoli, F. Guangcai, L. Zhong
2009, Conference Paper, 2009 Joint Urban Remote Sensing Event
We present an improved differential interferometric synthetic aperture radar (DInSAR) analysis method that measures motions of scatterers whose phases are stable between two SAR acquisitions. Such scatterers are referred to as temporarily persistent scatterers (TPS) for simplicity. Unlike the persistent scatterer InSAR (PS-InSAR) method that relies on a time-series of...
Instrumental record of debris flow initiation during natural rainfall: Implications for modeling slope stability
D. R. Montgomery, K. M. Schmidt, W. E. Dietrich, J. McKean
2009, Journal of Geophysical Research F: Earth Surface (114)
The middle of a hillslope hollow in the Oregon Coast Range failed and mobilized as a debris flow during heavy rainfall in November 1996. Automated pressure transducers recorded high spatial variability of pore water pressure within the area that mobilized as a debris flow, which initiated...
Impediments to predicting site response: Seismic property estimation and modeling simplifications
E.M. Thompson, L.G. Baise, R. E. Kayen, B.B. Guzina
2009, Bulletin of the Seismological Society of America (99) 2927-2949
We compare estimates of the empirical transfer function (ETF) to the plane SH-wave theoretical transfer function (TTF) within a laterally constant medium for invasive and noninvasive estimates of the seismic shear-wave slownesses at 13 Kiban-Kyoshin network stations throughout Japan. The difference between the ETF and either of the TTFs is...
Probabilistic estimation of numbers and costs of future landslides in the San Francisco Bay region
R. A. Crovelli, J. A. Coe
2009, Georisk (3) 206-223
We used historical records of damaging landslides triggered by rainstorms and a newly developed Probabilistic Landslide Assessment Cost Estimation System (PLACES) to estimate the numbers and direct costs of future landslides in the 10-county San Francisco Bay region. Historical records of damaging landslides in the region are incomplete. Therefore, our...
Rapid changes in small fish mercury concentrations in estuarine wetlands: Implications for wildlife risk and monitoring programs
Collin A. Eagles-Smith, Joshua T. Ackerman
2009, Environmental Science & Technology (43) 8658-8664
Small fish are commonly used to assess mercury (Hg) risk to wildlife and monitor Hg in wetlands. However, limited research has evaluated short-term Hg variability in small fish, which can have important implications for monitoring programs and risk assessment. We conducted a time-series study of Hg concentrations in two small...
Male songbirds provide indirect parental care by guarding females during incubation
B.C. Fedy, T. E. Martin
2009, Behavioral Ecology (20) 1034-1038
Across many taxa, guarding of fertile mates is a widespread tactic that enhances paternity assurance. However, guarding of mates can also occur during the nonfertile period, and the fitness benefits of this behavior are unclear. Male songbirds, for example, sometimes guard nonfertile females during foraging recesses from incubation. We hypothesized...
Predatory senescence in ageing wolves
D.R. MacNulty, D.W. Smith, J.A. Vucetich, L.D. Mech, D.R. Stahler, C. Packer
2009, Ecology Letters (12) 1347-1356
It is well established that ageing handicaps the ability of prey to escape predators, yet surprisingly little is known about how ageing affects the ability of predators to catch prey. Research into long-lived predators has assumed that adults have uniform impacts on prey regardless of age. Here we use longitudinal...
Analytical modeling of gravity changes and crustal deformation at volcanoes: The Long Valley caldera, California, case study
Maurizio Battaglia, D.P. Hill
2009, Tectonophysics (471) 45-57
Joint measurements of ground deformation and micro-gravity changes are an indispensable component for any volcano monitoring strategy. A number of analytical mathematical models are available in the literature that can be used to fit geodetic data and infer source location, depth and density. Bootstrap statistical methods allow estimations of the...
Aquatic ecosystems in Central Colorado are influenced by mineral forming processes and historical mining
T.S. Schmidt, S. E. Church, W.H. Clements, K.A. Mitchell, D. L. Fey, R. B. Wanty, P. L. Verplanck, Juan C.A. San, T. L. Klein, E.H. deWitt, B.W. Rockwell
2009, Conference Paper, Planning for an uncertain future - Monitoring, integration, and adaptation (SIR 2009-5049)
Stream water and sediment toxicity to aquatic insects were quantified from central Colorado catchments to distinguish the effect of geologic processes which result in high background metals concentrations from historical mining. Our sampling design targeted small catchments underlain by rocks of a single lithology, which allowed the development of biological...
On baseline corrections and uncertainty in response spectrafor baseline variations commonly encountered in digital accelerograph records
Sinan Akkar, David M. Boore
2009, Bulletin of the Seismological Society of America (99) 1671-1690
Most digital accelerograph recordings are plagued by long-period drifts, best seen in the velocity and displacement time series obtained from integration of the acceleration time series. These drifts often result in velocity values that are nonzero near the end of the record. This is clearly unphysical and can lead to...
Climatic extremes improve predictions of spatial patterns of tree species
N.E. Zimmermann, Nigel G. Yoccoz, T.C. Edwards Jr., E.S. Meier, W. Thuiller, Antoine Guisan, D.R. Schmatz, P.B. Pearman
2009, Conference Paper, Proceedings of the National Academy of Sciences of the United States of America
Understanding niche evolution, dynamics, and the response of species to climate change requires knowledge of the determinants of the environmental niche and species range limits. Mean values of climatic variables are often used in such analyses. In contrast, the increasing frequency of climate extremes suggests the importance of understanding their...
First-order exchange coefficient coupling for simulating surface water-groundwater interactions: Parameter sensitivity and consistency with a physics-based approach
B.A. Ebel, B.B. Mirus, C.S. Heppner, J.E. VanderKwaak, K. Loague
2009, Hydrological Processes (23) 1949-1959
Distributed hydrologic models capable of simulating fully-coupled surface water and groundwater flow are increasingly used to examine problems in the hydrologic sciences. Several techniques are currently available to couple the surface and subsurface; the two most frequently employed approaches are first-order exchange coefficients (a.k.a., the surface conductance method) and enforced...
Summary of current radiometric calibration coefficients for Landsat MSS, TM, ETM+, and EO-1 ALI sensors
G. Chander, B. L. Markham, D. L. Helder
2009, Remote Sensing of Environment (113) 893-903
This paper provides a summary of the current equations and rescaling factors for converting calibrated Digital Numbers (DNs) to absolute units of at-sensor spectral radiance, Top-Of-Atmosphere (TOA) reflectance, and at-sensor brightness temperature. It tabulates the necessary constants for the Multispectral Scanner (MSS), Thematic Mapper (TM), Enhanced Thematic Mapper Plus (ETM+),...
A Viscoelastic earthquake simulator with application to the San Francisco Bay region
Fred F. Pollitz
2009, Bulletin of the Seismological Society of America (99) 1760-1785
Earthquake simulation on synthetic fault networks carries great potential for characterizing the statistical patterns of earthquake occurrence. I present an earthquake simulator based on elastic dislocation theory. It accounts for the effects of interseismic tectonic loading, static stress steps at the time of earthquakes, and postearthquake stress readjustment through viscoelastic...
Ultra-deep oxidation and exotic copper formation at the late pliocene boyongan and bayugo porphyry copper-gold deposits, surigao, philippines: Geology, mineralogy, paleoaltimetry, and their implications for Geologic, physiographic, and tectonic controls
D.P. Braxton, D. R. Cooke, A.M. Ignacio, R. O. Rye, P.J. Waters
2009, Economic Geology (104) 333-349
The Boyongan and Bayugo porphyry copper-gold deposits are part of an emerging belt of intrusion-centered gold-rich deposits in the Surigao district of northeast Mindanao, Philippines. Exhumation and weathering of these Late Pliocene-age deposits has led to the development of the world's deepest known porphyry oxidation profile at Boyongan (600 m),...
Impacts of weathered tire debris on the development of Rana sylvatica larvae
K.M. Camponelli, R.E. Casey, J.W. Snodgrass, S.M. Lev, E. R. Landa
2009, Chemosphere (74) 717-722
Highway runoff has the potential to negatively impact receiving systems including stormwater retention ponds where highway particulate matter can accumulate following runoff events. Tire wear particles, which contain about 1% Zn by mass, make up approximately one-third of the vehicle derived particulates in highway runoff and therefore may serve as...
Factors influencing densities of non-indigenous species in the ballast water of ships arriving at ports in Puget Sound, Washington, United States
J.R. Cordell, D. J. Lawrence, N.C. Ferm, L.M. Tear, S.S. Smith, R.P. Herwig
2009, Aquatic Conservation: Marine and Freshwater Ecosystems (19) 322-343
Oceanographic characteristics and the presence of international shipping in Puget Sound, Washington, USA contribute to its vulnerability to non-indigenous species (NIS) invasions. To evaluate NIS arriving in ballast water, zooplankton was sampled in 380 ballast tanks of ships after they entered Puget Sound. Taxa were classified into a higher risk...
Climatic effects of 30 years of landscape change over the Greater Phoenix, Arizona, region: 1. Surface energy budget changes
M. Georgescu, G. Miguez-Macho, L. T. Steyaert, C.P. Weaver
2009, Journal of Geophysical Research D: Atmospheres (114)
This paper is part 1 of a two-part study that evaluates the climatic effects of recent landscape change for one of the nation's most rapidly expanding metropolitan complexes, the Greater Phoenix, Arizona, region. The region's landscape evolution over an approximate 30-year period since the early 1970s is documented on the...
