New data for Late Pleistocene Pinedale alpine glaciation from southwestern Colorado
L. Benson, R. Madole, G. Landis, J. Gosse
2005, Quaternary Science Reviews (24) 49-65
New cosmogenic surface-exposure ages of moraine-crest boulders from southwestern Colorado are compared with published surface-exposure ages of boulders from moraine complexes in north-central Colorado and in west-central (Fremont Lake basin) Wyoming. 10Be data sets from the three areas were scaled to a single 10Be production rate of 5.4 at/g/yr at...
Epidemiology of fractures in people with severe and profound developmental disabilities
N.R. Glick, M.H. Fischer, D.M. Heisey, G.E. Leverson, D.C. Mann
2005, Osteoporosis International (16) 389-396
Fractures are more prevalent among people with severe and profound developmental disabilities than in the general population. In order to characterize the tendency of these people to fracture, and to identify features that may guide the development of preventive strategies, we analyzed fracture epidemiology in people with severe and profound...
Magmatic effects of the Cobb hot spot on the Juan de Fuca Ridge
John Chadwick, M. Perfit, I. Ridley, I. Jonasson, G. Kamenov, W. Chadwick, R. Embley, Roux P. le, M. Smith
2005, Journal of Geophysical Research B: Solid Earth (110) 1-16
The interaction of the Juan de Fuca Ridge with the Cobb hot spot has had a considerable influence on the magmatism of the Axial Segment of the ridge, the second-order segment that overlies the hot spot. In addition to the construction of the large volcanic edifice of Axial Seamount, the...
Validation of abundance estimates from mark–recapture and removal techniques for rainbow trout captured by electrofishing in small streams
Amanda E. Rosenberger, Jason B. Dunham
2005, North American Journal of Fisheries Management (25) 1395-1410
Estimation of fish abundance in streams using the removal model or the Lincoln - Peterson mark - recapture model is a common practice in fisheries. These models produce misleading results if their assumptions are violated. We evaluated the assumptions of these two models via electrofishing of rainbow trout Oncorhynchus mykiss...
Stream invertebrate community functional responses to deposited sediment
C.F. Rabeni, K.E. Doisy, L.D. Zweig
2005, Aquatic Sciences (67) 395-402
We investigated functional responses of benthic invertebrates to deposited sediment in four Missouri USA streams. In each stream, invertebrates were sampled along continuums of deposited sediment (particles <2 mm in size) from 0 to 100% surface cover in reaches of fairly homogeneous substrate composition, current velocity, and water depths. Correlations,...
Regulation of landslide motion by dilatancy and pore pressure feedback
R.M. Iverson
2005, Journal of Geophysical Research F: Earth Surface (110)
A new mathematical model clarifies how diverse styles and rates of landslide motion can result from regulation of Coulomb friction by dilation or contraction of water‐saturated basal shear zones. Normalization of the model equations shows that feedback due to coupling between landslide motion, shear zone volume change, and pore pressure...
Linkages between climate, growth, competition at sea and production of sockeye salmon populations in Bristol Bay, 1955-2000
Jennifer L. Nielsen, Gregory T. Ruggerone
Sarah Behr, Helen Wiggins, Alison York, editor(s)
2005, Conference Paper, Proceedings of the open science meeting study of environmental Arctic change (SEARCH)
Bristol Bay, Alaska, supports one of the largest and most valuable salmon fisheries in the world. Salmon abundance in Bristol Bay and other northern areas more than doubled after the 1976–77 marine climate shift. However, in 1997–98, a major El Niño event led to unusual oceanographic conditions and Bristol Bay...
Quantitative assessment of benthic food resources for juvenile Gulf sturgeon, Acipenser oxyrinchus desotoi in the Suwannee River estuary, Florida, USA
R. A. Brooks, K. J. Sulak
2005, Estuaries (28) 767-775
Gulf sturgeon, Acipenser oxyrinchus desotoi, forage extensively in the Suwannee River estuary following emigration out of the Suwannee River, Florida. While in the estuary, juvenile Gulf sturgeon primarily feed on benthic infauna. In June–July 2002 and February–April 2003, random sites within the estuary were sampled for benthic macrofauna (2002 n...
Look what the cat dragged in: do parasites contribute to human cultural diversity?
Kevin D. Lafferty
2005, Behavioural Processes (68) 279-282
If human culture emerges from the modal personality of a population, can global variation in parasitism that affects personality lead to cultural diversity among nations? The answer could help explain why people seem to vary so much from one land to another. Thomas et al. (2005) review how parasites manipulate behaviour,...
Evaluation of ecological risk to populations of a threatened plant from an invasive biocontrol insect
S. M. Louda, T. A. Rand, A. E. Arnett, A. S. McClay, A. K. McEachern
2005, Ecological Applications (15) 234-249
Controversy exists over estimation of ecological risk in biological control. At present, the risk to the rare, federally listed Pitcher's thistle (Cirsium pitcheri) in North America from Rhinocyllus conicus, a biological control weevil now feeding on many native thistles, is unknown. We hypothesized that quantification of host specificity and potential...
Soil biota can change after exotic plant invasion: Does this affect ecosystem processes?
Jayne Belnap, Susan L. Phillips, S. K. Sherrod, A. Moldenke
2005, Ecology (86) 3007-3017
Invasion of the exotic annual grass Bromus tectorum into stands of the native perennial grass Hilaria jamesii significantly reduced the abundance of soil biota, especially microarthropods and nematodes. Effects of invasion on active and total bacterial and fungal biomass were variable, although populations generally increased after 50+ years of invasion....
Multi-decadal impacts of grazing on soil physical and biogeochemical properties in southeast Utah
Jason C. Neff, Richard L. Reynolds, Jayne Belnap, Paul J. Lamothe
2005, Ecological Applications (15) 87-95
Many soils in southeastern Utah are protected from surface disturbance by biological soil crusts that stabilize soils and reduce erosion by wind and water. When these crusts are disturbed by land use, soils become susceptible to erosion. In this study, we compare a never-grazed grassland in Canyonlands National Park with...
Can we estimate total magnetization directions from aeromagnetic data using Helbig's integrals?
Jeffrey Phillips
2005, Earth, Planets and Space (57) 681-689
An algorithm that implements Helbig’s (1963) integrals for estimating the vector components (mx, my, mz) of the magnetic dipole moment from the first order moments of the vector magnetic field components (ΔX, ΔY, ΔZ) is tested on real and synthetic data. After a grid of total field aeromagnetic data is converted to...
Landscape characteristics influence pond occupancy by frogs after accounting for detectability
M. J. Mazerolle, A. Desrochers, L. Rochefort
2005, Ecological Applications (15) 824-834
Many investigators have hypothesized that landscape attributes such as the amount and proximity of habitat are important for amphibian spatial patterns. This has produced a number of studies focusing on the effects of landscape characteristics on amphibian patterns of occurrence in patches or ponds, most of which conclude that the...
Ranking the risk of wildlife species hazardous to military aircraft
E. J. Zakrajsek, John A. Bissonette
2005, Wildlife Society Bulletin (33) 258-264
Collisions between birds and aircraft (birdstrikes) pose a major threat to aviation safety. Different species pose different levels of threat; thus, identification of the most hazardous species can help managers identify the level of hazard and prioritize mitigation efforts. Dolbeer et al. (2000) assessed the hazard posed by birds to...
A long-term (50 yr) historical perspective on flood-generating winter storms in the American River basin
M. D. Dettinger
2005, Conference Paper, Proceedings, 2005 California Extreme Precipitation Symposium
No abstract available....
Lower Methow tributaries effectiveness monitoring study: Study plan 2004-2008
P.J. Connolly
2005, Report
No abstract available ...
Parental nest defense on videotape: More reality than "myth"
Pamela J. Pietz, Diane A. Granfors
2005, The Auk (122) 701-705
Predation is recognized as the primary source of nest mortality in most passerine species (e.g. Ricklefs 1969, Martin 1992a); thus, it is no surprise that parental nest defense has received considerable scientific attention (see below). By nest defense, we refer to any parental behavior that decreases the probability that a...
Individual variation in staging and timing of spring migration of Pacific common eiders in Alaska
Margaret R. Petersen
2005, Conference Paper, Second North America Sea Duck Conference
Timing of migration and characterization of migration patterns of birds are usually based on dates of peak migration to and from staging, wintering, and breeding areas used by the bulk of a species. For Pacific common eiders (Somateria mollissima v-nigrum), as well as other species, the timing of migration into...
Population status of Kittlitz's Murrelet Brachyramphus brevirostris along the southern coast of the Alaska Peninsula
Thomas I. van Pelt, John F. Piatt
2005, Report
The Kittlitz's murrelet (Brachyramphus brevirostris) is a rare seabird that nests in alpine terrain and generally forages near tidewater glaciers during the breeding season. An estimated 95% of the global population breeds in Alaska, with some unknown proportion breeding in the Russian Far East. A global population estimate using bestavailable...
Habitat use, movements and home range of wintering Lesser Scaup in Florida
Garth Herring, Jaime A. Collazo
2005, Waterbirds (28) 71-78
Radio telemetry and diurnal time activity budgets were used to show that wintering Lesser Scaup (Aythya affinis) used different habitats for comfort and feeding activities at Merritt Island National Wildlife Refuge (Merritt Island), Florida and adjacent estuarine areas. Management should take this spatial consideration into account. The same data...
Radium isotopes in Cayuga Lake, New York: Indicators of inflow and mixing processes
T. F. Kraemer
2005, Limnology and Oceanography (50) 158-168
Naturally occurring radium isotopes (223Ra, 224Ra, 226Ra, and 228Ra) were measured in lake and tributary water of Cayuga Lake, New York, during the course of a vernal inflow event in the spring of 2001. A large influx of groundwater, probably from a carbonate aquifer, entered the lake at its extreme...
Sensitive ecological areas and species inventory of Actun Chapat Cave, Vaca Plateau, Belize
J.J. Wynne, W. Pleytez
2005, Journal of Cave and Karst Studies (67) 148-157
Cave ecosystems are considered one of the most poorly studied and fragile systems on Earth. Belize caves are no exception. This paper represents the first effort to synthesize information on both invertebrate and vertebrate observations from a Belize cave. Based on limited field research and a review of literature, we...
Carbon sequestration potential estimates with changes in land use and tillage practice in Ohio, USA
Z. Tan, R. Lal
2005, Agriculture, Ecosystems and Environment (111) 140-152
Soil C sequestration through changes in land use and management is one of the important strategies to mitigate the global greenhouse effect. This study was conducted to estimate C sequestration potential of the top 20 cm depth of soil for two scenarios in Ohio, USA: (1) with reforestation of both current...
Endemic arsenosis caused by indoor combustion of high-As coal in Guizhou Province, P.R. China
Z. Baoshan, W. Binbin, D. Zhenhua, Z. Daixing, Z. Yunshu, Z. Chen, C. Chaochang, R. B. Finkelman
2005, Environmental Geochemistry and Health (27) 521-528
The arsenic (As) content of coal relating with mineralization of gold in Southwest Guizhou Province, China is up to 35,000 ppm. The coal is burned indoors in open pits for daily cooking and crop drying. As a result, arsenic is precipitated and concentrated in corn (5-20 ppm), chili (100-800 ppm)...
