Influence of waves and horseshoe crab spawning on beach morphology and sediment grain-size characteristics on a sandy estuarine beach
N.L. Jackson, K.F. Nordstrom, D. R. Smith
2005, Sedimentology (52) 1097-1108
The effects of wave action and horseshoe crab spawning on the topography and grain-size characteristics on the foreshore of an estuarine sand beach in Delaware Bay, New Jersey, USA were evaluated using data collected over six consecutive high tides. Data were gathered inside and outside a 25 m long exclosure...
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...
Fire effects on soil organic matter content, composition, and nutrients in boreal interior Alaska
J. C. Neff, J.W. Harden, G. Gleixner
2005, Conference Paper, Canadian Journal of Forest Research
Boreal ecosystems contain a substantial fraction of the earth's soil carbon stores and are prone to frequent and severe wildfires. In this study, we examine changes in element and organic matter stocks due to a 1999 wildfire in Alaska. One year after the wildfire, burned soils contained between 1071 and...
Evidence for micronutrient limitation of biological soil crusts: Importance to arid-lands restoration
M. A. Bowker, J. Belnap, D. W. Davidson, S. L. Phillips
2005, Ecological Applications (15) 1941-1951
Desertification is a global problem, costly to national economies and human societies. Restoration of biological soil crusts (BSCs) may have an important role to play in the reversal of desertification due to their ability to decrease erosion and enhance soil fertility. To determine if there is evidence that lower fertility...
Empirical relations between elastic wavespeeds and density in the Earth's crust
T.M. Brocher
2005, Bulletin of the Seismological Society of America (95) 2081-2092
A compilation of compressional-wave (Vp) and shear-wave (Vs) velocities and densities for a wide variety of common lithologies is used to define new nonlinear, multivalued, and quantitative relations between these properties for the Earth's crust. Wireline borehole logs, vertical seismic profiles, laboratory measurements, and seismic tomography models provide a diverse...
United States geological survey's reserve-growth models and their implementation
T. R. Klett
2005, Conference Paper, Natural Resources Research
The USGS has developed several mathematical models to forecast reserve growth of fields both in the United States (U.S.) and the world. The models are based on historical reserve growth patterns of fields in the U.S. The patterns of past reserve growth are extrapolated to forecast future reserve growth. Changes...
ATLSS data viewer: A tool to analyze and display ATLSS model outputs
S. Hartley, J. Johnston
Moglen G.E., editor(s)
2005, Conference Paper, Proceedings of the 2005 Watershed Management Conference - Managing Watersheds for Human and Natural Impacts: Engineering, Ecological, and Economic Challenges
[No abstract available]...
Modeling downstream fining in sand-bed rivers. I: Formulation
S. Wright, G. Parker
2005, Journal of Hydraulic Research (43) 613-620
In this paper a numerical modeling formulation is presented for simulation of the development of the longitudinal profile and bed sediment distribution in sand-bed rivers. The objective of the model application, which is presented in the companion paper (Wright and Parker, 2005), is to study the development of two characteristics...
A method for quantifying bioavailable organic carbon in aquifer sediments
H.V. Rectanus, M. Widdowson, J. Novak, F. Chapelle
2005, Conference Paper, Proceedings of the 8th International In Situ and On-Site Bioremediation Symposium
The fact that naturally occurring microorganisms can biodegrade PCE and TCE allows the use of monitored natural attenuation (MNA) as a remediation strategy at chlorinated solvent-contaminated sites. Research at numerous chlorinated solvent sites indicates an active dechlorinating microbial population coupled with an ample supply of organic carbon are conditions needed...
Headwater riparian invertebrate communities associated with red alder and conifer wood and leaf litter in southeastern Alaska
C.M. LeSage, R.W. Merritt, M.S. Wipfli
2005, Northwest Science (79) 218-232
We examined how management of young upland forests in southeastern Alaska affect riparian invertebrate taxa richness, density, and biomass, in turn, potentially influencing food abundance for fish and wildlife. Southeastern Alaska forests are dominated by coniferous trees including Sitka spruce (Picea sitchensis (Bong.) Carr.), western hemlock (Tsuga heterophylla (Raf.) Sarg.),...
Juvenile frogs compensate for small metamorph size with terrestrial growth: Overcoming the effects of larval density and insecticide exposure
Michelle D. Boone
2005, Journal of Herpetology (39) 416-423
I reared four species of anurans (Rana sphenocephala [Southern Leopard Frog], Rana blairi [Plains Leopard Frog], Rana clamitans [Green Frog], and Bufo woodhousii [Woodhouse's Toad]) for seven to 12 months in small, outdoor terrestrial enclosures (1 × 2 m) to examine the consequences of larval competition (via density)...
Global pattern of trends in streamflow and water availability in a changing climate
P. C. D. Milly, K.A. Dunne, A. V. Vecchia
2005, Nature (438) 347-350
Water availability on the continents is important for human health, economic activity, ecosystem function and geophysical processes. Because the saturation vapour pressure of water in air is highly sensitive to temperature, perturbations in the global water cycle are expected to accompany climate warming. Regional patterns of warming-induced changes in surface hydroclimate...
Use of decision support systems as a drought management tool
D. Frevert, H. Lins
Moglen G.E., editor(s)
2005, Conference Paper, Proceedings of the 2005 Watershed Management Conference - Managing Watersheds for Human and Natural Impacts: Engineering, Ecological, and Economic Challenges
Droughts present a unique challenge to water managers throughout the world and the current drought in the western United States is taxing facilities to the limit. Coping with this severe drought requires state of the art decision support systems including efficient and accurate hydrologic process models, detailed hydrologic data bases...
Raccoon removal reduces sea turtle nest depredation in the Ten Thousand Islands of Florida
A.S. Garmestani, H.F. Percival
2005, Southeastern Naturalist (4) 469-472
Predation by raccoons, Procyon lotor marinus (L.), is the primary cause of sea turtle nest loss in the Ten Thousand Islands archipelago. Four islands within Ten Thousand Islands National Wildlife Refuge were surveyed for sea turtle nesting activity from 1991-95. Raccoons depredated 76-100% of nests on Panther Key from 1991-94,...
Regional economic effects of current and proposed management alternatives for Sand Lake National Wildlife Refuge
Lynne Koontz, Heather Lambert
2005, Open-File Report 2005-1195
The National Wildlife Refuge System Improvement Act of 1997 requires all units of the National Wildlife Refuge System to be managed under a Comprehensive Conservation Plan (CCP). The CCP must describe the desired future conditions of a Refuge and provide long range guidance and management direction to achieve Refuge purposes....
Outstanding issues for new geothermal resource assessments
C.F. Williams, M.J. Reed
2005, Conference Paper, Transactions - Geothermal Resources Council
A critical question for the future energy policy of the United States is the extent to which geothermal resources can contribute to an ever-increasing demand for electricity. Electric power production from geothermal sources exceeds that from wind and solar combined, yet the installed capacity falls far short of the geothermal...
Some geometric constraints on ring-width trend
Richard L. Phipps
2005, Tree-Ring Research (61) 73-76
Simulations of tree rings from trees of undisturbed forest sites are used to describe natural, long-term width trends. Ring-width trends of canopy-sized white oak are simulated from regressions of BAI(ring area) data of real trees. Examples are given of a tree from a typical re-growth forest in Illinois and of a...
Forms and accumulation of soil P in natural and recently restored peatlands - Upper Klamath Lake, Oregon, USA
S.A. Graham, C.B. Craft, P.V. McCormick, A. Aldous
2005, Wetlands (25) 594-606
Forms, amounts, and accumulation of soil phosphorus (P) were measured in natural and recently restored marshes surrounding Upper Klamath Lake located in south-central Oregon, USA to determine rates of P accumulation in natural marshes and to assess changes in P pools caused by long-term drainage in recently restored marshes. Soil...
Mountain plover population responses to black-tailed prairie dogs in Montana
S.J. Dinsmore, Gary C. White, F.L. Knopf
2005, Journal of Wildlife Management (69) 1546-1553
We studied a local population of mountain plovers (Charadrius montanus) in southern Phillips County, Montana, USA, from 1995 to 2000 to estimate annual rates of recruitment rate (f) and population change (??). We used Pradel models, and we modeled ?? as a constant across years, as a linear time trend,...
Upper-crustal structure of the inner Continental Borderland near Long Beach, California
S. Baher, G. Fuis, R. Sliter, W. R. Normark
2005, Bulletin of the Seismological Society of America (95) 1957-1969
A new P-wave velocity/structural model for the inner Continental Borderland (ICB) region was developed for the area near Long Beach, California. It combines controlled-source seismic reflection and refraction data collected during the 1994 Los Angeles Region Seismic Experiment (LARSE), multichannel seismic reflection data collected by the U.S. Geological Survey (1998-2000),...
Statistical analysis of water-quality data containing multiple detection limits: S-language software for regression on order statistics
L. Lee, D. Helsel
2005, Computers & Geosciences (31) 1241-1248
Trace contaminants in water, including metals and organics, often are measured at sufficiently low concentrations to be reported only as values below the instrument detection limit. Interpretation of these "less thans" is complicated when multiple detection limits occur. Statistical methods for multiply censored, or multiple-detection limit, datasets have been developed...
Geochemistry and jasper beds from the Ordovician Løkken ophiolite, Norway: origin of proximal and distal siliceous exhalites
Tor Grenne, John F. Slack
2005, Economic Geology (100) 1511-1527
Stratiform beds of jasper (hematitic chert), composed essentially of SiO2 (69–95 wt %) and Fe2O3 (3–25 wt %), can be traced several kilometers along strike in the Ordovician Løkken ophiolite, Norway. These siliceous beds are closely associated with volcanogenic massive sulfide (VMS) deposits and are interpreted as sea-floor gels that were deposited...
Post-precipitation bias in band-tailed pigeon surveys conducted at mineral sites
C.T. Overton, R.A. Schmitz, Michael L. Casazza
2005, Wildlife Society Bulletin (33) 1047-1054
Many animal surveys to estimate populations or index trends include protocol prohibiting counts during rain but fail to address effects of rainfall preceding the count. Prior research on Pacific Coast band-tailed pigeons (Patagioenas fasciata monilis) documented declines in use of mineral sites during rainfall. We hypothesized that prior precipitation was...
Seismicity and tilt associated with the 2003 Anatahan eruption sequence
S.H. Pozgay, R.A. White, D.A. Wiens, P.J. Shore, A.W. Sauter, J.L. Kaipat
2005, Journal of Volcanology and Geothermal Research (146) 60-76
On May 10, 2003, the first historical eruption of Anatahan volcano in the western Pacific Mariana Islands was fortuitously recorded by a broadband seismograph installed on the island only 4 days prior to the eruption. This station, located 7 km WNW of the active crater, together with another broadband seismograph...
Large-scale 3D subsurface conductivity imaging using full-wave forward modeling
G.L. Wang, W.C. Chew, T.J. Cui, D.L. Wright, D.V. Smith
2005, Conference Paper, IEEE Antennas and Propagation Society, AP-S International Symposium (Digest)
[No abstract available]...
