Transient electromagnetic mapping of clay units in the San Luis Valley, Colorado
David V. Fitterman, V. J. S. Grauch
2010, Conference Paper, Symposium on the Application of Geophysics to Engineering and Environmental Problems 2010
Transient electromagnetic soundings were used to obtain information needed to refine hydrologic models of the San Luis Valley, Colorado. The soundings were able to map an aquitard called the blue clay that separates an unconfined surface aquifer from a deeper confined aquifer. The blue clay forms a conductor with an average...
Colony attendance patterns by mated Forster's Terns Sterna forsteri using an automated data-logging receiver system
Jill D. Bluso-Demers, Joshua T. Ackerman, John Y. Takekawa
2010, Ardea (98) 59-65
In order to examine 24-hour colony attendance patterns by mated Forster's Terns Sterna forsteri in South San Francisco Bay, California, during incubation and chick-rearing stages, we radio-marked 10 individuals consisting of five pairs and recorded colony attendance using an automated data-logging receiver system. We calculated and analyzed five variables: the total attendance...
Variation in detection among passive infrared triggered-cameras used in wildlife research
Philip E. Damm, J. Barry Grand, Steven W. Barnett
2010, Proceedings of the Annual Conference of the Southeastern Association of Fish and Wildlife Agencies (64) 125-130
Precise and accurate estimates of demographics such as age structure, productivity, and density are necessary in determining habitat and harvest management strategies for wildlife populations. Surveys using automated cameras are becoming an increasingly popular tool for estimating these parameters. However, most camera studies fail to incorporate detection probabilities, leading to...
Composition, distribution, and potential toxicity of organochlorine mixtures in bed sediments of streams
Patrick J. Phillips, Lisa H. Nowell, Robert J. Gilliom, Naomi Nakagaki, Karen Riva-Murray, Carolyn VanAlstyne
2010, Science of the Total Environment (408) 594-606
Mixtures of organochlorine compounds have the potential for additive or interactive toxicity to organisms exposed in the stream. This study uses a variety of methods to identify mixtures and a modified concentration-addition approach to estimate their potential toxicity at 845 stream sites across the United States sampled between 1992 and...
Using spatial, seasonal, and diel drift patterns of larval Lost River suckers Deltistes luxatus (Cypriniformes: Catostomidae) and shortnose suckers Chasmistes brevirostris (Cypriniformes: Catostomidae) to help identify a site for a water withdrawal structure on the Williamson River, Oregon
Craig M. Ellsworth, Torrey J. Tyler, Scott P. VanderKooi
2010, Environmental Biology of Fishes (89) 47-57
A small irrigation diversion dam near Chiloquin, Oregon, was removed and replaced with a pump station to improve fish passage for Lost River suckers (Deltistes luxatus) and shortnose suckers (Chasmistes brevirostris) entering the Sprague River on their spawning migrations. During the developmental phase of the pump station, a need was...
On the resolution of shallow mantle viscosity structure using post-earthquake relaxation data: Application to the 1999 Hector Mine, California, earthquake
Fred F. Pollitz, Wayne R. Thatcher
2010, Journal of Geophysical Research B: Solid Earth
Most models of lower crust/mantle viscosity inferred from postearthquake relaxation assume one or two uniform-viscosity layers. A few existing models possess apparently significant radially variable viscosity structure in the shallow mantle (e.g., the upper 200 km), but the resolution of such variations is not clear. We use a geophysical inverse...
Attributes for MRB_E2RF1 Catchments by Major River Basins in the Conterminous United States: Normalized Atmospheric Deposition for 2002, Ammonium (NH4)
Michael Wieczorek, Andrew E. LaMotte
2010, Data Series 491-14
This tabular data set represents the average normalized (wet) deposition, in kilograms per square kilometer multiplied by 100, of ammonium (NH4) for the year 2002 compiled for every MRB_E2RF1 catchment of the Major River Basins (MRBs, Crawford and others, 2006). Estimates of NH4 deposition are based on National Atmospheric Deposition...
Association of wintering raptors with Conservation Reserve Enhancement Program grasslands in Pennsylvania
A. Wilson, M. Brittingham, G. Grove
2010, Journal of Field Ornithology (81) 361-372
Conservation grasslands can provide valuable habitat resource for breeding songbirds, but their value for wintering raptors has received little attention. We hypothesized that increased availability of grassland habitat through the Conservation Reserve Enhancement Program (CREP) has resulted in an increase or redistribution in numbers of four species of raptors in...
Teaching citizen science skills online: Implications for invasive species training programs
G. Newman, A. Crall, M. Laituri, J. Graham, T. Stohlgren, J.C. Moore, K. Kodrich, K.A. Holfelder
2010, Applied Environmental Education and Communication (9) 276-286
Citizen science programs are emerging as an efficient way to increase data collection and help monitor invasive species. Effective invasive species monitoring requires rigid data quality assurances if expensive control efforts are to be guided by volunteer data. To achieve data quality, effective online training is needed to improve field...
Coal lithotypes before and after saturation with CO2; insights from micro- and mesoporosity, fluidity, and functional group distribution
Maria Mastalerz, A. Drobniak, R. Walker, D. Morse
2010, International Journal of Coal Geology (83) 467-474
Four lithotypes, vitrain, bright clarain, clarain, and fusain, were hand-picked from the core of the Pennsylvanian Springfield Coal Member (Petersburg Formation) in Illinois. These lithotypes were analyzed petrographically and for meso- and micropore characteristics, functional group distribution using FTIR techniques, and fluidity. High-pressure CO2 adsorption isotherm analyses of these lithotypes...
Geological evolution of the Antongil Craton, NE Madagascar
D. I. Schofield, Ronald J. Thomas, K. M. Goodenough, B. De Waele, P. E. J. Pitfield, R. M. Key, W. Bauer, G. J. Walsh, D. J. Lidke, A.V. Ralison, M. Rabarimanana, J. M. Rafahatelo, T. Randriamananjara
2010, Precambrian Research (182) 187-203
The Antongil Craton, along with the Masora and Antananarivo cratons, make up the fundamental Archaean building blocks of the island of Madagascar. They were juxtaposed during the late-Neoproterozoic to early Palaeozoic assembly of Gondwana. In this paper we give a synthesis of the geology of the Antongil Craton and present...
Accuracy of gap analysis habitat models in predicting physical features for wildlife-habitat associations in the southwest U.S.
K.G. Boykin, B.C. Thompson, S. Propeck-Gray
2010, Ecological Modelling (221) 2769-2775
Despite widespread and long-standing efforts to model wildlife-habitat associations using remotely sensed and other spatially explicit data, there are relatively few evaluations of the performance of variables included in predictive models relative to actual features on the landscape. As part of the National Gap Analysis Program, we specifically examined physical...
Gravity modeling of the Muertos Trough and tectonic implications (north-eastern Caribbean)
Bruna J.L. Granja, A. Munoz-Martin, Uri S. ten Brink, Andres Carbo-Gorosabel, Estrada P. Llanes, J. Martin-Davila, D. Cordoba-Barba, Morollon M. Catalan
2010, Marine Geophysical Research (31) 263-283
The Muertos Trough in the northeast Caribbean has been interpreted as a subduction zone from seismicity, leading to infer a possible reversal subduction polarity. However, the distribution of the seismicity is very diffuse and makes definition of the plate geometry difficult. In addition, the compressive deformational features observed in the...
Seismic hazard mapping of California considering site effects
E. Kalkan, C.J. Wills, D.M. Branum
2010, Earthquake Spectra (26) 1039-1055
In this paper, we have combined the U.S. Geological Survey's National Seismic Hazard Maps model with the California geologic map showing 17 generalized geologic units that can be defined by their VS30. We regrouped these units into seven VS30 values and calculated a probabilistic seismic hazard map for the entire...
Effects of landscape features on waterbird use of rice fields
S. King, C.S. Elphick, D. Guadagnin, O. Taft, T. Amano
2010, Waterbirds (33) 151-159
Literature is reviewed to determine the effects of landscape features on waterbird use of fields in regions where rice (Oryza sativa) is grown. Rice-growing landscapes often consist of diverse land uses and land cover, including rice fields, irrigation ditches, other agricultural fields, grasslands, forests and natural wetlands. Numerous studies indicate...
Faunal assemblages and multi-scale habitat patterns in headwater tributaries of the South Fork Trinity River - an unregulated river embedded within a multiple-use landscape
H.H. Welsh, G.R. Hodgson, J.J. Duda, J.M. Emlen
2010, Animal Biodiversity and Conservation (33) 63-87
Headwaters can represent 80% of stream kilometers in a watershed, and they also have unique physical and biological properties that have only recently been recognized for their importance in sustaining healthy functioning stream networks and their ecological services. We sampled 60 headwater tributaries in the South Fork Trinity River, a...
Identifying regions of strong scattering at the core-mantle boundary from analysis of PKKP precursor energy
S. Rost, P.S. Earle
2010, Earth and Planetary Science Letters (297) 616-626
We detect seismic scattering from the core-mantle boundary related to the phase PKKP (PK. KP) in data from small aperture seismic arrays in India and Canada. The detection of these scattered waves in data from small aperture arrays is new and allows a better characterization of the fine-scale structure of...
Use of chemosensory cues as repellents for sea lamprey: Potential directions for population management
I. Imre, G.E. Brown, R.A. Bergstedt, R. McDonald
2010, Journal of Great Lakes Research (36) 790-793
Sea lamprey invaded the Great Lakes in the early 20th century and caused an abrupt decline in the population densities of several native fish species. The integrated management of this invasive species is composed of chemical (lampricide) applications, low-head barrier dams, adult trapping and sterile male release. Recently, there has...
The persistence of endangered Florida Salt Marsh Voles in salt marshes of the central Florida Gulf Coast
A.S. Hotaling, H.F. Percival, W.M. Kitchens, J.W. Kasbohm
2010, Southeastern Naturalist (9) 795-802
Two endangered Microtus pennsylvanicus dukecampbelli (Florida Salt Marsh Vole) were captured at a new location, in February of 2009, at Lower Suwannee National Wildlife Refuge. Since the species discovery in 1979, only 43 Florida Salt Marsh Voles (hereafter FSM Vole) have been captured. Outside of the type locality, this is...
Predicting the retreat and migration of tidal forests along the northern Gulf of Mexico under sea-level rise
T.W. Doyle, K. W. Krauss, W.H. Conner, A.S. From
2010, Forest Ecology and Management (259) 770-777
Tidal freshwater forests in coastal regions of the southeastern United States are undergoing dieback and retreat from increasing tidal inundation and saltwater intrusion attributed to climate variability and sea-level rise. In many areas, tidal saltwater forests (mangroves) contrastingly are expanding landward in subtropical coastal reaches succeeding freshwater marsh and forest...
Selection, trans-species polymorphism, and locus identification of major histocompatibility complex class IIβ alleles of New World ranid frogs
Karen M. Kiemnec-Tyburczy, Jonathan Q. Richmond, Anna E. Savage, Kelly R. Zamudio
2010, Immunogenetics (62) 741-751
Genes encoded by the major histocompatibility complex (MHC) play key roles in the vertebrate immune system. However, our understanding of the evolutionary processes and underlying genetic mechanisms shaping these genes is limited in many taxa, including amphibians, a group currently impacted by emerging infectious diseases. To further elucidate the evolution...
The annual cycles of phytoplankton biomass
Monika Winder, James E. Cloern
2010, Philosophical Transactions of the Royal Society B: Biological Sciences (365) 3215-3226
Terrestrial plants are powerful climate sentinels because their annual cycles of growth, reproduction and senescence are finely tuned to the annual climate cycle having a period of one year. Consistency in the seasonal phasing of terrestrial plant activity provides a relatively low-noise background from which phenological shifts can be detected...
Evaluating the spatiotemporal variations of water budget across China over 1951-2006 using IBIS model
Q. Zhu, H. Jiang, J. Liu, X. Wei, C. Peng, X. Fang, S. Liu, G. Zhou, S. Yu, W. Ju
2010, Hydrological Processes (24) 429-445
The Integrated Biosphere Simulator is used to evaluate the spatial and temporal patterns of the crucial hydrological variables [run-off and actual evapotranspiration (AET)] of the water balance across China for the period 1951–2006 including a precipitation analysis. Results suggest three major findings. First, simulated run-off captured 85% of the spatial...
Detrital zircon provenance from three turbidite depocenters of the Middle-Upper Triassic Songpan-Ganzi complex, central China: Record of collisional tectonics, erosional exhumation, and sediment production
A.L. Weislogel, S.A. Graham, E. Z. Chang, J. L. Wooden, G. E. Gehrels
2010, Geological Society of America Bulletin (122) 2041-2062
To test the idea that the voluminous upper Middle to Upper Triassic turbidite strata in the Songpan-Ganzi complex of central China archive a detrital record of Dabie ultrahigh-pressure (UHP) terrane unroofing, we report 2080 single detrital U-Pb zircon ages by sensitive high-resolution ion microprobe-reverse geometry (SHRIMP-RG) and laser ablation-inductively coupled...
Ecological hierarchies and self-organisation - Pattern analysis, modelling and process integration across scales
H. Reuter, F. Jopp, J. M. Blanco-Moreno, C. Damgaard, Y. Matsinos, D.L. DeAngelis
2010, Basic and Applied Ecology (11) 572-581
A continuing discussion in applied and theoretical ecology focuses on the relationship of different organisational levels and on how ecological systems interact across scales. We address principal approaches to cope with complex across-level issues in ecology by applying elements of hierarchy theory and the theory of complex adaptive systems. A...
