Manipulation of turtle populations for conservation: Half-way technologies or viable options?: Chapter 9
Richard A. Seigel, C. Kenneth Dodd Jr.
Michael W. Klemens, editor(s)
2000, Book chapter, Turtle conservation
No abstract available...
Style and age of late Oligocene-early Miocene deformation in the southern Stillwater Range, west central Nevada: Paleomagnetism, geochronology, and field relations
Mark R. Hudson, David A. John, James E. Conrad, Edwin H. McKee
2000, Journal of Geophysical Research B: Solid Earth (105) 929-954
Paleomagnetic and geochronologic data combined with geologic mapping tightly restrict the timing and character of a late Oligocene to early Miocene episode of large magnitude extension in the southern Stillwater Range and adjacent regions of west central Nevada. The southern Stillwater Range was the site of an Oligocene to early...
Osmotic generation of 'anomalous' fluid pressures in geological environments
C.E. Neuzil
2000, Nature (403) 182-184
Osmotic pressures are generated by differences in chemical potential of a solution across a membrane. But whether osmosis can have a significant effect on the pressure of fluids in geological environments has been controversial, because the membrane properties of geological media are poorly understood. 'Anomalous' pressures - large departures from...
Negative pH and extremely acidic mine waters from Iron Mountain, California
D. Kirk Nordstrom, Charles N. Alpers, C.J. Ptacek, D.W. Blowes
2000, Environmental Science & Technology (34) 254-258
Extremely acidic mine waters with pH values as low as -3.6, total dissolved metal concentrations as high as 200 g/L, and sulfate concentrations as high as 760 g/L, have been encountered underground in the Richmond Mine at Iron Mountain, CA. These are the most acidic waters known. The pH measurements...
Debris flow monitoring in the Acquabona watershed on the Dolomites (Italian Alps)
M. Berti, R. Genevois, R. LaHusen, A. Simoni, P.R. Tecca
2000, Physics and Chemistry of the Earth, Part B: Hydrology, Oceans and Atmosphere (25) 707-715
In 1997 a field monitoring system was installed in Acquabona Creek in the Dolomites (Eastern Italian Alps) to observe the hydrologic conditions for debris flow occurrence and some dynamic properties of debris flow. The monitoring system consists of three remote stations: an upper one located at the head of...
Assessing sorbent injection mercury control effectiveness in flue gas streams
T.R. Carey, C. F. Richardson, R. Chang, F.B. Meserole, M. Rostam-Abadi, S. Chen
2000, Environmental Progress (19) 167-174
One promising approach for removing mercury from coal-fired, utility flue gas involves the direct injection of mercury sorbents. Although this method has been effective at removing mercury in municipal waste incinerators, tests conducted to date on utility coal-fired boilers show that mercury removal is much more difficult in utility flue...
Changes in sea urchins and kelp following a reduction in sea otter density as a result of the Exxon Valdez oil spill
Thomas A. Dean, James L. Bodkin, Stephen C. Jewett, Daniel H. Monson, D. Jung
2000, Marine Ecology Progress Series (199) 281-291
Interactions between sea otters Enhydra lutris, sea urchins Strongylocentrotus droebachiensis, and kelp were investigated following the reduction in sea otter density in Prince William Sound, Alaska, after the Exxon Valdez oil spill in 1989. At northern Knight Island, a heavily oiled portion of the sound, sea otter abundance was reduced...
10,000 Years of explosive eruptions of Merapi Volcano, Central Java: archaeological and modern implications
C. G. Newhall, S. Bronto, B. Alloway, N.G. Banks, I. Bahar, Del Marmol, R.D. Hadisantono, R. T. Holcomb, J. McGeehin, J.N. Miksic, M. Rubin, S.D. Sayudi, R. Sukhyar, Supriyati Andreastuti, R.I. Tilling, R. Torley, D. Trimble, A.D. Wirakusumah
2000, Journal of Volcanology and Geothermal Research (100) 9-50
Stratigraphy and radiocarbon dating of pyroclastic deposits at Merapi Volcano, Central Java, reveals ~10,000 years of explosive eruptions. Highlights include: (1) Construction of an Old Merapi stratovolcano to the height of the present cone or slightly higher. Our oldest age for an explosive eruption is 9630±60 14C y B.P.; construction...
Data report: Mid-Pliocene diatom assemblages at sites 1016, 1021, and 1022
John A. Barron
Susan Nessler, Christine M. Miller, Lori L. Peters, editor(s)
2000, Proceedings of the Ocean Drilling Program: Scientific Results 167-4
Diatom assemblages from the middle part of the Pliocene (3.2-2.5 Ma) were investigated from Ocean Drilling Program Sites 1016, 1021, and 1022 in an effort to infer paleotemperature fluctuations off California.<span face="Verdana, Arial, Helvetica, sans-serif" data-mce-style="font-family:...
Gap analysis: Concepts, methods, and recent results
M.D. Jennings
2000, Landscape Ecology (15) 5-20
Rapid progress is being made in the conceptual, technical, and organizational requirements for generating synoptic multi-scale views of the earth's surface and its biological content. Using the spatially comprehensive data that are now available, researchers, land managers, and land-use planners can, for the first time, quantitatively place landscape units -...
. The status and conservation of endemic Malagasy Chelonians: an historic perspective
Miguel Pedrono, Augustin Sarovy, L. L. Smith, Roger Bour
2000, Book chapter, Diversity and endemism in Madagascar
No abstract available....
An unusually patterned spotted python, Antaresia maculosa, from Jourama Falls, Queensland
C. Kenneth Dodd Jr.
2000, Herpetofauna (30) 10-11
No abstract available....
A landmark publication on the amphibians of northern Eurasia
C. Kenneth Dodd Jr.
2000, Alytes (18) 91-94
No abstract available....
Alternating seismic uplift and subsidence in the late Holocene at Madang, Papua New Guinea: Evidence from raised reefs
A.W. Tudhope, R. W. Buddemeier, C.P. Chilcott, K.R. Berryman, D.G. Fautin, M. Jebb, J.H. Lipps, R.G. Pearce, T.P. Scoffin, G.B. Shimmield
2000, Journal of Geophysical Research B: Solid Earth (105) 13797-13807
Well-preserved mid-late Holocene coral reefs are exposed in low coastal cliffs in the vicinity of the Madang lagoon on the north coast of Papua New Guinea. Results from U/Th and 14C dating of corals, surveying, and field mapping indicate several major changes in relative sea level over this period. Specifically,...
Formation of ferromanganese crusts on northwest intertropical Pacific seamounts: Electron photomicrography and microprobe chemistry
K.S. Jeong, H.-S. Jung, J.-K. Kang, C.L. Morgan, J.R. Hein
2000, Marine Geology (162) 541-559
Seven ferromanganese crusts from the northwest intertropical Pacific seamounts were analyzed for photomicroscopic growth structures, microprobe chemistry, and ages based on Co-chronometer growth rate. The crusts on the Marshall Islands seamounts are thick and ale divided into phosphatized lower older and nonphosphatized upper younger growth generations: the older crust consists...
Global-scale patterns of forest fragmentation
Kurt H. Riitters, James Wickham, Robert V. O’Neill, Bruce Jones, Elizabeth Smith
2000, Conservation Ecology (4)
We report an analysis of forest fragmentation based on 1-km resolution land-cover maps for the globe. Measurements in analysis windows from 81 km2 (9 x 9 pixels, “small” scale) to 59,049 km2 (243 x 243 pixels, “large” scale) were used to characterize the fragmentation around each forested pixel. We...
Correspondence of stream benthic invertebrate assemblages to regional classification schemes in Missouri
C.F. Rabeni, K.E. Doisy
2000, Journal of the North American Benthological Society (19) 419-428
Benthic invertebrates from 44 reference streams throughout the state of Missouri were examined for their concordance with established regionalization systems, both aquatic and terrestrial. Invertebrate assemblages coincided nicely with Pflieger's established aquatic faunal regions system, expanding its generality to more than fish assemblages. Our benthic invertebrate and Pflieger's fish assemblages...
The dependence of permeability on effective stress for an injection test in the Higashi-Hachimantai Geothermal Field
M. Nathenson
2000, Geophysical Research Letters (27) 589-592
A simple inverse-power relation for the influence of effective stress on permeability is used to explain the flow behavior during an injection test at the Higashi-Hachimantai geothermal field, Japan. The new analytical expression successfully models data from the experiment involving high-pressure injection and monitoring at an observation well....
The relationship of nitrate concentrations in streams to row crop land use in Iowa
K. E. Schilling, R.D. Libra
2000, Journal of Environmental Quality (29) 1846-1851
The relationship between row crop land use and nitrate N concentrations in surface water was evaluated for 15 Iowa watersheds ranging from 1002 to 2774 km2 and 10 smaller watersheds ranging from 47 to 775 km2 for the period 1996 to 1998. The percentage of land in row crop varied from 24...
Significant deposits of gold, silver, copper, lead, and zinc in the United States
K. R. Long, J.H. DeYoung Jr., S. Ludington
2000, Economic Geology (95) 629-644
Approximately 99 percent of past production and remaining identified resources of gold, silver, copper, lead, and zinc in the United States are accounted for by deposits that originally contained at least 2 metric tonnes (t) gold, 85 t silver, 50,000 t copper, 30,000 t lead, or 50,000 t zinc. The...
Assessment of nitrate-nitrogen distribution in Kansas groundwater, 1990-1998
M.A. Townsend, D.P. Young
2000, Natural Resources Research (9) 125-134
Nitrate-nitrogen (nitrate-N) in groundwater is a potential problem in many parts of Kansas. From 1990 to 1998, 747 water samples were collected from domestic, irrigation, monitoring, and public water supply wells primarily from the western two-thirds of the state, and analyzed for nitrate-N by the Kansas Geological Survey. Nitrate-N concentrations...
Alagnak watershed rainbow trout seasonal movement
Julie M. Meka, E. Eric Knudsen, David C. Douglas
John H. Eiler, Doris J. Alcorn, Michael R. Neuman, editor(s)
2000, Conference Paper, Biotelemetry 15: Proceedings of the 15th international symposium on biotelemetry
Adult rainbow trout were radio-tagged in two locations in the Alagnak River drainage in 1997 and 1998 and radio-tracked until March 1999. The telemetry data indicate the two different sample groups exhibited independent movements with little geographic overlap. However, some tagged fish from each sample group migrated downstream to the...
Determining timescales for groundwater flow and solute transport
Peter G. Cook, J.K. Bohlke
Peter G. Cook, Andrew L. Herczeg, editor(s)
2000, Book chapter, Environmental tracers in subsurface hydrology
One of the principal uses of environmental tracers is for determining the ages of soil waters and groundwaters. (We may refer to this as ‘hydrochronology’by analogy with the dating of solid materials known as geochronology.) Information on soil water and groundwater age enables timescales for a range of subsurface processes...
Studies of volcanoes of Alaska by satellite radar interferometry
Z. Lu, C. Wicks Jr., D. Dzurisin, W. Thatcher, J. Power
Sawaya-Lacoste H., editor(s)
2000, Conference Paper
Interferometric synthetic aperture radar (InSAR) has provided a new imaging geodesy technique to measure the deformation of volcanoes at tens-of-meter horizontal resolution with centimeter to subcentimeter vertical precision. The two-dimensional surface deformation data enables the construction of detailed numerical models allowing the study of magmatic and tectonic processes beneath volcanoes....
Environmental contaminants in Texas, USA, wetland reptiles: Evaluation using blood samples
D. R. Clark Jr., J. W. Bickham, D.L. Baker, D.F. Cowman
2000, Environmental Toxicology and Chemistry (19) 2259-2265
Four species of reptiles (diamondback water snake [Nerodia rhombifer], blotched water snake [N. erythrogaster], cottonmouth [Agkistrodon piscivorus], and red-eared slider [Trachemys scripta]) were collected at two contaminated and three reference sites in Texas, USA. Old River Slough has received intensive applications of agricultural chemicals since the 1950s. Municipal Lake received...
