Appearance and possible homing of two species of sculpins in Maine tidepools
J.R. Muring
2001, Northeastern Naturalist (8) 207-218
Two species of sculpins (Cottidae), the grubby, Myoxocephalus aenaeus, and the shorthorn sculpin, M. scorpius, were studied in rocky tidepools along the coast of Maine. Fishes were captured and measured during 116 sampling trips between 1979 and 1996. Both of these species of sculpins are from the northwestern Atlantic Ocean...
Carbon isotope systematics and CO2 sources in The Geysers-Clear Lake region, northern California, USA
D. Bergfeld, F. Goff, C. J. Janik
2001, Geothermics (30) 303-331
Carbon isotope analyses of calcite veins, organic carbon, CO2 and CH4 from 96 rock and 46 gas samples show that metamorphic calcite veins and disseminated, organically-derived carbon from Franciscan Complex and Great Valley Sequence rocks have provided a primary carbon source for geothermal fluids during past and present hydrothermal activity...
Subglacial sediments: A regional geological template for iceflow in West Antarctica
M. Studinger, R.E. Bell, D. D. Blankenship, C. A. Finn, R.A. Arko, D. L. Morse, I. Joughin
2001, Geophysical Research Letters (28) 3493-3496
We use aerogeophysical data to estimate the distribution of marine subglacial sediments and fault-bounded sedimentary basins beneath the West Antarctic Ice Sheet (WAIS). We find that significant ice flow occurs exclusively in regions covered by subglacial sediments. The onsets and lateral margins of ice streams coincide with the limit of...
A method for mapping apparent stress and energy radiation applied to the 1994 Northridge earthquake fault zone-revisited
Art McGarr, Joe B. Fletcher
2001, Geophysical Research Letters (28) 3529-3532
McGarr and Fletcher (2000) introduced a technique for estimating apparent stress and seismic energy radiation associated with small patches of a larger fault plane and then applied this method to the slip model of the Northridge earthquake (Wald et al., 1996). These results must be revised because we did not...
Subspecific affinity of black bears in the White River National Wildlife Refuge
J. Warrillow, M. Culver, E. Hallerman, M. Vaughan
2001, Journal of Heredity (92) 226-233
The black bear population of the White River National Wildlife Refuge (NWR) is adjacent to populations of black bear in Louisiana (Urusus americanus luteolus) which are listed as threatened under the U.S. Endangered Species Act. Wildlife management plans can pose restrictions on bear harvests and timber extraction; therefore the management...
Water Resources Data, Alaska, Water Year 2000
D. F. Meyer, D.L. Hess, M.F. Schellekens, C. W. Smith, E.F. Snyder, G. L. Solin
2001, Water Data Report AK-00-1
Water-resources data for the 2000 water year for Alaska consists of records of stage, discharge, and water quality of streams; stages of lakes; and water levels and water quality of ground-water wells. This volume contains records for water discharge at 106 gaging stations; stage or contents only at 4 gaging...
Cytochrome P450 1A expression in midwater fishes: Potential effects of chemical contaminants in remote oceanic zones
John J. Stegeman, Jennifer J. Schlezinger, James E. Craddock, Donald E. Tillitt
2001, Environmental Science & Technology (35) 54-62
Cytochrome P450 1A (CYP1A) induction is a robust marker for exposure to polynuclear aromatic hydrocarbons and planar halogenated aromatic hydrocarbons that are aryl hydrocarbon receptor agonists. We examined CYP1A expression in mesopelagic fishes from the western North Atlantic. Individuals in 22 species were obtained from slope water and the Sargasso...
Characterization of dispersion, attenuation, and anisotropy at the Buena Vista Hills field, California
C.L. Hackert, J.O. Parra, R.L. Brown, H.A. Collier
2001, Geophysics (66) 90-96
We create a log of intrinsic dispersion and attenuation for the Antelope Shale formation of the Buena Vista Hills field, San Joaquin Valley, California. High dispersion (or low Q) values correlate with thin sand and carbonate beds within the Antelope Shale. These beds are at least ten times as permeable as...
Bioavailability of metals in stream food webs and hazards to brook trout (Salvelinus fontinalis) in the upper Animas River watershed, Colorado
J.M. Besser, W. G. Brumbaugh, T.W. May, S. E. Church, B. A. Kimball
2001, Archives of Environmental Contamination and Toxicology (40) 48-59
The water quality, habitats, and biota of streams in the upper Animas River watershed of Colorado, USA, are affected by metal contamination associated with acid drainage. We determined metal concentrations in components of the food web of the Animas River and its tributaries - periphyton (aufwuchs), benthic invertebrates, and livers...
Global occurrences of gas hydrate
K.A. Kvenvolden, T.D. Lorenson
2001, Conference Paper, Proceedings of the International Offshore and Polar Engineering Conference
Natural gas hydrate is found worldwide in sediments of outer continental margins of all oceans and in polar areas with continuous permafrost. There are currently 77 localities identified globally where geophysical, geochemical and/or geological evidence indicates the presence of gas hydrate. Details concerning individual gas-hydrate occurrences are compiled at a...
Sperm-cell ultrastructure of North American sturgeons. IV. The pallid sturgeon (Scaphirhynchus albus Forbes and Richardson, 1905)
M. N. DiLauro, R.A. Walsh, M. Peiffer, R. M. Bennett
2001, Canadian Journal of Zoology (79) 802-808
Sperm-cell morphology and ultrastructure in the pallid sturgeon (Scaphirhynchus albus) were examined using transmission and scanning electron microscopy. Metrics and structure were compared with similar metrics obtained from other published descriptions of sturgeon sperm cells. General morphology was found to be similar to that of sperm cells of the white...
Demographic response of black bears at Cold Lake, Alberta, to the removal of adult males
Glen A. Sargeant, Robert L. Ruff
2001, Ursus (12) 59-68
Previous reports described an increase in population density following the removal of 23 adult male black bears (Ursus americanus) from a 218-km2 study area near Cold Lake, Alberta (the CLSA). This finding plays a central role in continuing debates over population regulation in bears, but has recently been criticized because...
Fate and origin of 1,2-dichloropropane in an unconfined shallow aquifer
Anthony J. Tesoriero, F.E. Loffler, H. Liebscher
2001, Environmental Science & Technology (35) 455-461
A shallow aquifer with different redox zones overlain by intensive agricultural activity was monitored for the occurrence of 1,2-dichloropropane (DCP) to assess the fate and origin of this pollutant. DCP was detected more frequently in groundwater samples collected in aerobic and nitrate-reducing zones than those collected from iron-reducing zones. Simulated...
Estimating methane production rates in bogs and landfills by deuterium enrichment of pore water
D. I. Siegel, J. P. Chanton, P.H. Glaser, L.S. Chasar, D.O. Rosenberry
2001, Global Biogeochemical Cycles (15) 967-975
Raised bogs and municipal waste landfills harbor large populations of methanogens within their domed deposits of anoxic organic matter. Although the methane emissions from these sites have been estimated by various methods, limited data exist on the activity of the methanogens at depth. We therefore analyzed the stable isotopic signature...
The mesoproterozoic midcontinent rift system, Lake Superior region, USA
R.W. Ojakangas, G. B. Morey, J.C. Green
2001, Sedimentary Geology (141-142) 421-442
Exposures in the Lake Superior region, and associated geophysical evidence, show that a 2000 km-long rift system developed within the North American craton ??? 1109-1087 Ma, the age span of the most of the volcanic rocks. This system is characterized by immense volumes of mafic igneous rocks, mostly subaerial plateau...
Dating Shuidonggou and the Upper Palaeolithic blade industry in North China
David B. Madsen, L. Jingzen, P. J. Brantingham, Gao Xing, R. G. Elston, R. L. Bettinger
2001, Antiquity (75) 706-716
Shuidonggou is unique within the Chinese Palaeolithic sequence and its assemblage is reminiscent of Upper Palaeolithic core-and-blade technologies in Mongolia and southern Siberia. Limited chronological controls have prevented evaluation of this technology in both the Chinese and greater Eurasian Palaeolithic. Dating of recently discovered hearths at Locality 2 places Shuidonggou...
The effect of community composition on persistence of prey with their predators in an assemblage of pond-breeding amphibians
S.C. Walls, M.C. Williams
2001, Oecologia (128) 134-141
We examined whether the species composition of a community influences the persistence of larval Ambystoma maculatum in assemblages composed of two larger intraguild predators (A. opacum and A. jeffersonianum) and an alternative prey species (tadpoles of Rana sylvatica). We predicted a priori that A. maculatum would have higher survival in...
Implications of SHRIMP and microstructural data on the age and kinematics of shearing in the Asir terrane, southern Arabian Shield, Saudi Arabia
P.R. Johnson, F.H. Kattan, J. L. Wooden
2001, Gondwana Research (4) 172-173
The Asir terrane consists of north-trending belts of variably metamorphosed volcanic, sedimentary, and plutonic rocks that are cut by numerous shear zones (Fig. 1). Previous workers interpreted the shear zones as sutures, structures that modify earlier sutures, or structures that define the margins of...
Factors associated with Autumn rearing of duck broods in temperate North America
Gary L. Krapu, D.A. Brandt, J.A. Beiser
2001, Wildfowl (52) 145-158
Dabbling ducks Genus Anas occasionally nest during mid- and late summer in the Prairie Pothole Region (PPR) of midcontinent North America but little information is available on their Autumn-reared broods or those of other duck genera. Densities, species composition, and wetland habitat use by Autumn reared duck broods (age classes...
Overview of SAX99: Environmental considerations
M. D. Richardson, K.B. Briggs, L.D. Bibee, P.A. Jumars, W.B. Sawyer, D.B. Albert, R.H. Bennett, T.K. Berger, M.J. Buckingham, N.P. Chotiros, P.H. Dahl, N. T. DeWitt, P. Fleischer, R. Flood, C. F. Greenlaw, D. V. Holliday, M.H. Hulbert, M.P. Hutnak, P.D. Jackson, J.S. Jaffe, H. Paul Johnson, D. L. Lavoie, A.P. Lyons, C.S. Martens, D.E. McGehee, K.D. Moore, T.H. Orsi, J.N. Piper, R.I. Ray, A.H. Reed, R.F.L. Self, J.L. Schmidt, S.G. Schock, F. Simonet, R.D. Stoll, D. Tang, D.E. Thistle, E.I. Thorsos, D.J. Walter, R. A. Wheatcroft
2001, IEEE Journal of Oceanic Engineering (26) 26-53
A 1-km2 area located 2 km off the Florida Pan-handle (30??22.6???N; 86??38.7???W) was selected as the site to conduct high-frequency acoustic seafloor penetration, sediment propagation, and bottom scattering experiments [1]. Side scan, multibeam, and normal incidence chirp acoustic surveys as well as subsequent video surveys, diver observations, and vibra coring,...
Wildfire-related debris-flow initiation processes, Storm King Mountain, Colorado
S.H. Cannon, R. M. Kirkham, M. Parise
2001, Geomorphology (39) 171-188
A torrential rainstorm on September 1, 1994 at the recently burned hillslopes of Storm King Mountain, CO, resulted in the generation of debris flows from every burned drainage basin. Maps (1:5000 scale) of bedrock and surficial materials and of the debris-flow paths, coupled with a 10-m Digital Elevation Model (DEM)...
The Meteoritical Bulletin, no. 85, 2001 September
J. N. Grossman, J. Zipfel
2001, Meteoritics and Planetary Science (36)
Meteoritical Bulletin No. 85 lists information for 1376 newly classified meteorites, comprising 658 from Antarctica, 409 from Africa, 265 from Asia (262 of which are from Oman), 31 from North America, 7 from South America, 3 from Australia, and 3 from Europe. Information is provided for 11 falls (Dergaon, Dunbogan,...
Slip distribution and tectonic implication of the 1999 Chi-Chi, Taiwan, earthquake
C. Ji, D.V. Helmberger, T.-R.A. Song, K.-F. Ma, D.J. Wald
2001, Geophysical Research Letters (28) 4379-4382
We report on the fault complexity of the large (Mw = 7.6) Chi-Chi earthquake obtained by inverting densely and well-distributed static measurements consisting of 119 GPS and 23 doubly integrated strong motion records. We show that the slip of the Chi-Chi earthquake was concentrated on the surface of a "wedge...
Area requirements of grassland birds: A regional perspective
Douglas H. Johnson, Lawrence D. Igl
2001, The Auk (118) 24-34
Area requirements of grassland birds have not been studied except in tallgrass prairie. We studied the relation between both species-occurrence and density and patch size by conducting 699 fixed-radius point counts of 15 bird species on 303 restored grassland areas in nine counties in four northern Great Plains states. Northern...
Fungal symbiosis from mutualism to parasitism: who controls the outcome, host or invader?
R. S. Redman, D.D. Dunigan, R. J. Rodriguez
2001, New Phytologist (151) 705-716
Plant symbiotic fungi are generally thought to express a single lifestyle that might increase (mutualism), decrease (parasitism), or have no influence (commensalism) on host fitness. However, data are presented here demonstrating that plant pathogenic Colletotrichum species are able to asymptomatically colonize plants and express nonpathogenic lifestyles. Experiments were conducted in...
