Three decades of Martian surface changes
P.E. Geissler
2005, Journal of Geophysical Research E: Planets (110) 1-23
The surface of Mars has changed dramatically during the three decades spanned by spacecraft exploration. Comparisons of Mars Global Surveyor images with Viking and Mariner 9 pictures suggest that more than one third of Mars' surface area has brightened or darkened by at least 10%. Such albedo changes could produce...
An approach toward a combined scheme for the petrographic classification of fly ash: Revision and clarification
J.C. Hower, I. Suarez-Ruiz, Maria Mastalerz
2005, Energy and Fuels (19) 653-655
Hower and Mastalerz's classification scheme for fly ash is modified to make more widely acceptable. First, proper consideration is given to the potential role of anthracite in the development of isotropic and anisotropic chars. Second, the role of low-reflectance inertinite in producing vesicular chars is noted. It is shown that...
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...
Impact of food supplementation and methionine on high densities of cotton rats: Support of the amino-acid-quality hypothesis?
R.E. Webb, David M. Leslie Jr., R.L. Lochmiller, R.E. Masters
2005, Journal of Mammalogy (86) 46-55
Considerable research supports the tenet that quantity and quality of food limit vertebrate populations. We evaluated predictions that increased availabilities of food and the essential amino acid methionine were related to population limitation of the hispid cotton rat (Sigmodon hispidus). Effects of supplemental food and methionine on density, survival, and...
The role of shoreland development and commercial cranberry farming in a lake in Wisconsin, USA
P.J. Garrison, S.A. Fitzgerald
2005, Journal of Paleolimnology (33) 169-188
Musky Bay in Lac Courte Oreilles, Wisconsin, USA, is currently eutrophic. This large, shallow bay of an oligotrophic lake possesses the densest aquatic plant growth and a floating algal mat. Paleoecological reconstructions encompassing the last 130 years, were based on multiproxy analyses of sediment cores from three coring sites, two...
Environmental stresses and skeletal deformities in fish from the Willamette River, Oregon
Daniel L. Villeneuve, Lawrence R. Curtis, Jeffrey J. Jenkins, Kara E. Warner, Fred Tilton, Michael L. Kent, Virginia G. Watral, Michael E. Cunningham, Douglas F. Markle, Doolalai Sethajintanin, Oraphin Krissanakriangkrai, Eugene R. Johnson, Robert Grove
2005, Environmental Science & Technology (39) 3495-3506
The Willamette River, one of 14 American Heritage Rivers, flows through the most densely populated and agriculturally productive region of Oregon. Previous biological monitoring of the Willamette River detected elevated frequencies of skeletal deformities in fish from certain areas of the lower (Newberg pool [NP], rivermile [RM] 26−55) and middle...
A new sampler design for measuring sedimentation in streams
Lara B. Hedrick, S.A. Welsh, J.D. Hedrick
2005, North American Journal of Fisheries Management (25) 238-244
Sedimentation alters aquatic habitats and negatively affects fish and invertebrate communities but is difficult to quantify. To monitor bed load sedimentation, we designed a sampler with a 10.16-cm polyvinyl chloride coupling and removable sediment trap. We conducted a trial study of our samplers in riffle and pool habitats upstream and...
Broad-scale predictors of canada lynx occurrence in eastern North America
C.L. Hoving, D.J. Harrison, W.B. Krohn, R.A. Joseph, M. O'Brien
2005, Journal of Wildlife Management (69) 739-751
The Canada lynx (Lynx canadensis) is listed as a threatened species throughout the southern extent of its geographic range in the United States. Most research on lynx has been conducted in the western United States and Canada; little is known about the ecology of lynx in eastern North America. To...
Southwestern willow flycatcher breeding site and territory summary - 2004
S.L. Durst, M. K. Sogge, H.C. English, S. O Williams III, B.E. Kus, S.J. Sferra
2005, Report
No abstract available at this time...
Numerical modeling of an estuary: A comprehensive skill assessment
J.C. Warner, W.R. Geyer, J.A. Lerczak
2005, Journal of Geophysical Research C: Oceans (110) 1-13
Numerical simulations of the Hudson River estuary using a terrain-following, three-dimensional model (Regional Ocean Modeling System (ROMS)) are compared with an extensive set of time series and spatially resolved measurements over a 43 day period with large variations in tidal forcing and river discharge. The model is particularly effective at...
Freshwater mussel shells as environmental chronicles: Geochemical and taphonomic signatures of mercury-related extirpations in the North Fork Holston River, Virginia
M.E. Brown, M. Kowalewski, R. J. Neves, D.S. Cherry, M.E. Schreiber
2005, Environmental Science & Technology (39) 1455-1462
This study utilized freshwater mussel shells to assess mercury (Hg) contamination in the North Fork Holston River that extirpated (caused local extinctions of) a diverse mussel fauna. Shells (n = 366) were collected from five sites situated upstream (two sites), just below (one site), and downstream (two sites) of the...
Mapping NEHRP VS30 site classes
T.L. Holzer, A.C. Padovani, M.J. Bennett, T.E. Noce, J. C. Tinsley III
2005, Earthquake Spectra (21) 353-370
Site-amplification potential in a 140-km2 area on the eastern shore of San Francisco Bay, California, was mapped with data from 210 seismic cone penetration test (SCPT) soundings. NEHRP VS30 values were computed on a 50-m grid by both taking into account the thickness and using mean values of locally measured...
First record of the plains minnow, Hybognathus placitus, in Canada
R. M. Sylvester, S. E. Freeling, C. R. Berry Jr.
2005, Canadian Field-Naturalist (119) 219-223
Seven Plains Minnows, Hybognathus placitus, Family Cyprinidae, were collected on 11 June 2003 from Morgan Creek, in Grasslands National Park, Saskatchewan, Canada. This collection is the first record of the species in Canada and extends the northern distribution limit of the species. Of 95 Hybognathus spp. collected at the site, only eight specimens...
Protocols for drawing blood from the brachial plexus of desert tortoises: Instructions for ordering equipment and culture media; summary of how to draw blood and information on how to contract for laboratory analysis and ship laboratory samples. Appendix on New Technique for Conducting Nasal Lavages by L. Wendland
K.H. Berry, A. Demmon, T. Bailey
2005, Report
No abstract available at this time...
Predator avoidance as a function of flocking in the sexually dichromatic Hawaii akepa
P.J. Hart, L.A. Freed
2005, Journal of Ethology (23) 29-33
Hypotheses for joining a mixed-species bird flock consider each species as a single unit. In sexually dichromatic birds, differential conspicuousness between the sexes may result in differences in vigilance for predators. Aspects of the predator avoidance and foraging enhancement hypotheses for the selective value of joining a mixed-species flock were...
Reserve growth in oil fields of the North Sea
T. R. Klett, D. L. Gautier
2005, Petroleum Geoscience (11) 179-190
The assessment of petroleum resources of the North Sea, as well as other areas of the world, requires a viable means to forecast the amount of growth of reserve estimates (reserve growth) for discovered fields and to predict the potential fully developed sizes of undiscovered fields. This study investigates the...
Wolf population persistence in real life
L.D. Mech
O. Liberg, editor(s)
2005, Conference Paper, Genetic aspects of viability in small wolf populations with special emphasis on the Scandinavian wolf population
Wolf (Canis lupus) populations tend to be resilient and to persist for long periods, and several characteristics contribute to their resilience and persistence: (1) age of first reproduction (2-3 years), (2) high annual litter size (mean = 6), (3) low dispersal age (1-3 years), and (4) long potential dispersal distance...
A whole image approach using field measurements for transforming EO1 Hyperion hyperspectral data into canopy reflectance spectra
Elijah W. Ramsey III, G. Nelson
2005, International Journal of Remote Sensing (26) 1589-1610
To maximize the spectral distinctiveness (information) of the canopy reflectance, an atmospheric correction strategy was implemented to provide accurate estimates of the intrinsic reflectance from the Earth Observing 1 (EO1) satellite Hyperion sensor signal. In rendering the canopy reflectance, an estimate of optical depth derived from a measurement of downwelling...
Solute transport and storage mechanisms in wetlands of the Everglades, south Florida
Judson W. Harvey, James E. Saiers, Jessica T. Newlin
2005, Water Resources Research (41)
Solute transport and storage processes in wetlands play an important role in biogeochemical cycling and in wetland water quality functions. In the wetlands of the Everglades, there are few data or guidelines to characterize transport through the heterogeneous flow environment. Our goal was to conduct a tracer study to help...
Speciation of mercury and mode of transport from placer gold mine tailings
A.J. Slowey, J. J. Rytuba, Gordon E. Brown Jr.
2005, Environmental Science & Technology (39) 1547-1554
Historic placer gold mining in the Clear Creek tributary to the Sacramento River (Redding, CA) has highly impacted the hydrology and ecology of an important salmonid spawning stream. Restoration of the watershed utilized dredge tailings contaminated with mercury (Hg) introduced during gold mining, posing the possibility of persistent Hg release...
A new synziphosurine (Chelicerata: Xiphosura) from the Late Llandovery (Silurian) Waukesha Lagerstatte, Wisconsin, USA
R. A. Moore, D. E. G. Briggs, S. J. Braddy, L. I. Anderson, Donald G. Mikulic, Joanne Kluessendorf
2005, Journal of Paleontology (79) 242-250
A new synziphosurine (Chelicerata:Xiphosura) is described from the Late Llandovery (Silurian) Konservat-Lagerstätte of Waukesha, Wisconsin, USA. Venustulus waukeshaensis n.gen. and sp. is characterized by a semicircular carapace with a slightly procurved posterior margin lacking genal spines and an opisthosoma composed of 10 freely articulating segments, divided into a preabdomen of seven...
Investigating surface water-well interaction using stable isotope ratios of water
R. J. Hunt, T.B. Coplen, N.L. Haas, D. A. Saad, M. A. Borchardt
2005, Journal of Hydrology (302) 154-172
Because surface water can be a source of undesirable water quality in a drinking water well, an understanding of the amount of surface water and its travel time to the well is needed to assess a well's vulnerability. Stable <a title="Learn more about isotope ratios"...
Analysis of ground-measured and passive-microwave-derived snow depth variations in midwinter across the Northern Great Plains
A.T.C. Chang, R.E.J. Kelly, E.G. Josberger, R.L. Armstrong, J.L. Foster, N. M. Mognard
2005, Journal of Hydrometeorology (6) 20-33
Accurate estimation of snow mass is important for the characterization of the hydrological cycle at different space and time scales. For effective water resources management, accurate estimation of snow storage is needed. Conventionally, snow depth is measured at a point, and in order to monitor snow depth in a temporally...
Movement patterns of rural and suburban white-tailed deer in Massachusetts
C.R. Gaughan, S. DeStefano
2005, Urban Ecosystems (8) 191-202
We used satellite land cover data and the program FRAGSTATS toquantify land cover types and calculate the amount of forest edge available in suburban and rural regions of northeastern and northwestern Massachusetts. Cover categories included forest cover, open canopy vegetation, and non-deer habitat. We calculated all edge segments where forest...
3H/3He age data in assessing the susceptibility of wells to contamination
Andrew H. Manning, D. Kip Solomon, Susan A. Thiros
2005, Ground Water (43) 353-367
Regulatory agencies are becoming increasingly interested in using young–ground water dating techniques, such as the 3H/3He method, in assessing the susceptibility of public supply wells (PSWs) to contamination. However, recent studies emphasize that ground water samples of mixed age may be the norm, particularly from long-screened PSWs, and tracer-based “apparent” ages...
