Spatial extent of a hydrothermal system at Kilauea Volcano, Hawaii, determined from array analyses of shallow long-period seismicity 2. Results
J. Almendros, B. Chouet, P. Dawson
2001, Journal of Geophysical Research B: Solid Earth (106) 13581-13597
Array data from a seismic experiment carried out at Kilauea Volcano, Hawaii, in February 1997, are analyzed by the frequency-slowness method. The slowness vectors are determined at each of three small-aperture seismic antennas for the first arrivals of 1129 long-period (LP) events and 147 samples of volcanic tremor. The source...
Adiabatic temperature changes of magma-gas mixtures during ascent and eruption
L.G. Mastin, M.S. Ghiorso
2001, Contributions to Mineralogy and Petrology (141) 307-321
Most quantitative studies of flow dynamics in eruptive conduits during volcanic eruptions use a simplified energy equation that ignores either temperature changes, or the thermal effects of gas exsolution. In this paper we assess the effects of those simplifications by analyzing the influence of equilibrium gas exsolution and expansion on...
Aeolian dust in Colorado Plateau soils: Nutrient inputs and recent change in source
Richard L. Reynolds, Jayne Belnap, Paul Lamothe, Fred Luiszer
2001, Proceedings of the National Academy of Sciences (98) 7123-7127
Aeolian dust (windblown silt and clay) is an important component in arid-land ecosystems because it may contribute to soil formation and furnish essential nutrients. Few geologic surfaces, however, have been characterized with respect to dust-accumulation history and resultant nutrient enrichment. We have developed a combination of...
Observation of the geology and geomorphology of the 1999 Marsokhod test site
R. A. De Hon, N.G. Barlow, M. K. Reagan, E. Arthur Bettis III, C.T. Foster Jr., V. C. Gulick, L.S. Crumpler, J.C. Aubele, M. G. Chapman, K. L. Tanaka
2001, Journal of Geophysical Research E: Planets (106) 7665-7682
The Marsokhod rover returned data from six stations that were used to decipher the geomorphology and geology of a region not previously visited by members of the geomorphology field team. Satellite images and simulated descent images provided information about the regional setting. The landing zone was on an alluvial apron...
Uncertainty, learning, and the optimal management of wildlife
B. Kenneth Williams
2001, Environmental and Ecological Statistics (8) 269-288
Wildlife management is limited by uncontrolled and often unrecognized environmental variation, by limited capabilities to observe and control animal populations, and by a lack of understanding about the biological processes driving population dynamics. In this paper I describe a comprehensive framework for management that includes multiple models and likelihood values...
Searching for biological specimens from midwestern parks: Pitfalls and solutions
J. P. Bennett
2001, The George Wright Forum (18) 26-39
This paper describes the results of searches of herbarium and museum collections and databases for records of vertebrate and vascular plant specimens that had been collected in 15 midwestern National Park System units. The records of these specimens were previously unknown to the National Park Service (NPS). In the course...
Influence of breeding habitat on bear predation and age at maturity and sexual dimorphism of sockeye salmon populations
Thomas P. Quinn, Lisa A. Wetzel, Susan Bishop, Kristi Overberg, Donald E. Rogers
2001, Canadian Journal of Zoology (79) 1782-1793
Age structure and morphology differ among Pacific salmon (Oncorhynchus spp.) populations. Sexual selection and reproductive capacity (fecundity and egg size) generally favor large (old), deep-bodied fish. We hypothesized that natural selection from physical access to spawning grounds and size-biased predation by bears, Ursus spp., opposes such large, deep-bodied salmon. Accordingly, size and shape...
Droughts, epic droughts and droughty centuries - lessons from a California paleoclimatic record: a PACLIM 2001 meeting report
M. D. Dettinger
2001, Interagency Ecological Program Newsletter (14) 51-53
During the early 1990s (but echoing studies by S.T. Harding at the University of California, from as early as the 1930s), several lines of paleoclimate evidence in and around the Sierra Nevada Range have provided the water community in California with some real horror stories. By studying ancient tree stumps...
Alexander von Humboldt (1769-1859): Contributions to knowledge of New World fishes
Leo G. Nico
G. Aymard, editor(s)
2001, Book chapter, Alexander von Humboldt: Homenaje al Bicentenario de su llegada a tierras Venezolanas (16 de julio-1799 al 26 de novienbre-1800)
No abstract available....
Toward assessing the effects of bank stabilization activities on wildlife communities of the upper Yellowstone River, U.S.A
Susan K. Skagen, Erin Muths, Rod D. Adams
2001, Open-File Report 2001-58
The upper Yellowstone River has been subject to multiple bank stabilization projects between Gardiner and Springdale, Montana, over the last 20 years. Additional channel modification activities are likely on the Yellowstone, and there is concern over the short- and long-term cumulative effects of channel modification activities on physical processes and...
A suggestion for fitting ground-motion attenuation near an extended earthquake source
D.J. Andrews
2001, Seismological Research Letters (72) 454-461
No abstract available....
Natural history notes: Gyrinophilus porphyriticus danielsi (Blue-ridge Spring Salamander). Arboreality
William J. Barichivich, Kimberly G. Smith, J. L. Waldron
2001, Herpetological Review (32) 177-178
No abstract available....
The Brown Tree Snake on Guam: How the Arrival of One Invasive Species Damaged the Ecology, Commerce, Electrical Systems and Human Health on Guam: A Comprehensive Information Source
Thomas H. Fritts, Dawn Leasman-Tanner
2001, Information and Technology Report 2002-0009
Synopsis -- Shortly after World War II, and before 1952, the brown tree snake was accidentally transported from its native range in the South Pacific to Guam, probably as a stowaway in ship cargo. As a result of abnormally abundant prey resources on Guam and the absence of natural predators...
Population structure of Atlantic salmon (Salmo salar L.): A range-wide perspective from microsatellite DNA variation
T.L. King, S.T. Kalinowski, W. B. Schill, A.P. Spidle, B.A. Lubinski
2001, Molecular Ecology (10) 807-821
Atlantic salmon (n = 1682) from 27 anadromous river populations and two nonanadromous strains ranging from south-central Maine, USA to northern Spain were genotyped at 12 microsatellite DNA loci. This suite of moderate to highly polymorphic loci revealed 266 alleles (5–37/locus) range-wide. Statistically significant allelic and genotypic heterogeneity was observed across loci...
Monthly fractional green vegetation cover associated with land cover classes of the conterminous USA
Kevin P. Gallo, Dan Tarpley, Ken Mitchell, Ivan Csiszar, Tobias Owen, Bradley C. Reed
2001, Geophysical Research Letters (28) 2089-2092
The land cover classes developed under the coordination of the International Geosphere-Biosphere Programme Data and Information System (IGBP-DIS) have been analyzed for a study area that includes the Conterminous United States and portions of Mexico and Canada. The 1-km resolution data have been analyzed to produce a gridded data set...
[Book review] A Review and Synthesis of Effects of Alterations to the Water Temperature Regime on Freshwater Life Stages of Salmonids, with Special Reference to Chinook Salmon, by D.A. McCullough
J.M. Bartholow
2001, Transactions of the American Fisheries Society (130) 350-350
Review of: A Review and Synthesis of Effects of Alterations to the Water Temperature Regime on Freshwater Life Stages of Salmonids, with Special Reference to Chinook Salmon. By Dale A. McCullough. Columbia River Inter-Tribal Fish Commission. 22 February 1999. REPORT #: EPA 910-R-99-010....
[Book review] Environmental change in mountains and uplands, by Martin Beniston
Jill Baron
2001, Eos, Transactions, American Geophysical Union (82) 30-30
Review of: Environmental Change in Mountains and Uplands. Martin Beniston. ISBN13: 9780340706367, ISBN10: 0340706368. Paperback, 192 pages. May 2000....
Corticosterone facilitates begging and affects resource allocation in the black-legged kittiwake
Alexander S Kitaysky, John C. Wingfield, John F. Piatt
2001, Behavioral Ecology (12) 619-625
Parent black-legged kittiwakes (Rissa tridactyla) and their dependent chicks respond to food shortages by increasing circulating levels of corticosterone. To examine the behavioral significance of corticosterone release, we experimentally increased levels of circulating corticosterone in parents and chicks up to the levels observed during food shortages. We found that corticosterone-implanted...
Factors influencing the nitrification efficiency of fluidized bed filter with a plastic bead medium
S. I. Sandu, G. D. Boardman, Barnaby J. Watten, B. L. Brazil
2001, Aquacultural Engineering (26) 41-59
The performance of fluidized bed nitrification filters charged with 2×4 ABS plastic beads (specific gravity 1.06) was evaluated. Three unique bed-height to diameter ratios were established, in triplicate, using column diameters of 12.7, 15.2 and 17.8 cm. Filters received water spiked with recycled nutrients and ammonia (TAN), from one of...
Herpetofaunal Inventory and Monitoring at Silverwood Lake State Recreation Area
C. Brown, Robert N. Fisher
2001, Report
No abstract available at this time...
Tag retention, growth, and survival of red swamp crayfish marked with a visible implant tag
J. Jeffery Isely, P.E. Stockett
2001, North American Journal of Fisheries Management (21) 422-424
Eighty juvenile (means: 42.4 mm total length, 1.6 g) red swamp crayfish Procambarus clarkii were implanted with sequentially numbered visible implant tags and held in the laboratory. Tags were injected transversely into the musculature just beneath the exoskeleton of the third abdominal segment from the cephalothorax; tags were visible upon...
Digital terrain modelling and industrial surface metrology - Converging crafts
R.J. Pike
2001, International Journal of Machine Tools and Manufacture (41) 1881-1888
Quantitative characterisation of surface form, increasingly from digital 3-D height data, is cross-disciplinary and can be applied at any scale. Thus, separation of industrial-surface metrology from its Earth-science counterpart, (digital) terrain modelling, is artificial. Their growing convergence presents an opportunity to develop in surface morphometry a unified approach to surface...
Monitoring wildfire effects: Coming to terms with pseudoreplication
Phillip J. van Mantgem, Mark W. Schwartz, MaryBeth Keifer
2001, Natural Areas Journal (21) 266-273
No abstract available....
Geologic and molluscan evidence for a previously misunderstood late pleistocene, cool water, open coast terrace at Newport Bay, Southern California
C.L. Powell II
2001, Veliger (44) 340-347
A macro-invertebrate fauna from a 7 m elevation terrace remnant on the front of the Newport Mesa contains 63 mollusks, 58 specifically identified. These taxa represent a mixed death assemblage similar to that seen on rocky terrace platforms at intertidal depths in southern to central California today. The extralimital northern...
Known and suggested quaternary faulting in the midcontinent United States
R. L. Wheeler, A. J. Crone
2001, Engineering Geology (62) 51-78
The midcontinent United States between the Appalachian and Rocky Mountains contains 40 known faults or other potentially tectonic features for which published geologic information shows or suggests Quaternary tectonic faulting. We report results of a systematic evaluation of published and other publicly available geologic evidence of Quaternary faulting. These results...
