Conventional U-Pb dating versus SHRIMP of the Santa Barbara Granite Massif, Rondonia, Brazil
I. Sparrenberger, Jorge S. Bettencourt, R. M. Tosdal, J. L. Wooden
2002, Geologia USP - Serie Cientifica (2) 79-94
The Santa Ba??rbara Granite Massif is part of the Younger Granites of Rondo??nia (998 - 974 Ma) and is included in the Rondo??nia Tin Province (SW Amazonian Craton). It comprises three highly fractionated metaluminous to peraluminous within-plate A-type granite units emplaced in older medium-grade metamorphic rocks. Sn-mineralization is closely associated...
Behavioral effects of environmental enrichment on harbor seals (Phoca vitulina concolor) and gray seals (Halichoerus grypus)
S. A. Hunter, M. S. Bay, M. L. Martin, Jeff S. Hatfield
2002, Zoo Biology (21) 375-387
Zoos and aquariums have been incorporating environmental enrichment into their animal care programs for the past 30 years to increase mental stimulation and promote natural behaviors. However, most attempts to document the effects of enrichment on animal behavior have focused on terrestrial mammals. Staff at the National Aquarium in Baltimore...
Gila trout - genetic broodstock management plan
H. L. Kincaid, R. Reisenbichler
2002, Report
Abstract not available ...
A new genus of alien grass discovered in Hawai‘i: Oryzopsis (Poaceae)
Steve J. Dougill, Paul C. Banko
2002, Newsletter of the Hawaiian Botanical Society (41)
No abstract available....
Diversion of meltwater from Kautz Glacier initiates small debris flows near Van Trump Park, Mount Rainier, Washington
James W. Vallance, Carolyn L. Driedger, William E. Scott
2002, Washington Geology (30) 17-19
No abstract available....
Long-term ecosystem studies in Isle Royale, Olympic, and Rocky Mountain National Parks; Noatak National Preserve, and Fraser Experimental Forest; Noatak National Preserve, and Fraser Experimental Forest. Research Report no. 95
R. Stottlemyer, Jill Baron, R. Edmonds, L. Scherbarth, Heidi Steltzer
2002, Report
No abstract available....
Velocity and Sediment Concentration Measurements over Bedforms in Sand-Bed Rivers
Robert R. Holmes Jr., M.H. Garcia
Wahl T.L.Pugh C.A.Oberg K.A.Vermeyen T.B.Wahl T.L.Pugh C.A.Oberg K.A.Vermeyen T.B., editor(s)
2002, Conference Paper, Hydraulic Measurements and Experimental Methods
Bedforms often are present on the bed of alluvial sand-bed rivers. Bedforms, such as dunes, impact the flow field. In this field study, velocity and suspended-sediment concentration measurements were made longitudinally along a dune field in large (5-15 meters deep) alluvial sand-bed rivers. The velocity and suspended-sediment concentration data was...
Fragmentation: Is the message clear?
J.A. Bissonette, Ilse Storch
2002, Ecology and Society (6)
In this paper, we briefly discuss some of the fundamental problems arising from the inherent complexity of larger-scale ecological systems. We examine the tenuous assumption of a direct correspondence between ecological data and theory, we comment on a recent report that evaluated the efficacy of fragmentation experiments, and we briefly...
Habitat use by striped bass in relation to seasonal changes in water quality in a southern reservoir
James J. Schaffler, J. Jeffery Isely, W.E. Hayes
2002, Transactions of the American Fisheries Society (131) 817-827
Adult striped bass Morone saxatilis (n = 61; 597-914 mm total length) were captured by hook and line throughout Lake Murray, South Carolina, and by electrofishing in the Greenwood Dam tailrace and upper Saluda River above Lake Murray, implanted with temperature-sensitive radio transmitters, and tracked biweekly. During late winter-early spring,...
Fouth World Congress of Herpetology, 3-9 December 2001, Bentota, Sri Lanka
C. Kenneth Dodd Jr., B. Bartholomew
2002, Herpetological Review (33) 3-5
No abstract available....
Community food webs
Donald L. DeAngelis
Abdel H. El-Shaarawi, Walter W. Piegorsch, editor(s)
2002, Book chapter, Encyclopedia of Environmetrics
Community food webs describe the feeding relationships, or trophic interactions, between the species of an ecological community. Both the structure and dynamics of such webs are the focus of food web research. The topological structures of empirical food webs from many ecosystems have been published on the basis of field...
Processes controlling the remobilization of surficial sediment and formation of sedimentary furrows in north-central Long Island Sound
L.J. Poppe, H.J. Knebel, R. S. Lewis, M. L. DiGiacomo-Cohen
2002, Journal of Coastal Research (18) 741-750
Sidescan sonar, bathymetric, subbottom, and bottom-photographic surveys and sediment sampling have improved our understanding of the processes that control the complex distribution of bottom sediments and benthic habitats in Long Island Sound. Although the deeper (>20 m) waters of the central Sound are long-term depositional areas characterized by relatively weak...
Sensitive high resolution ion microprobe (SHRIMP) detrital zircon geochronology provides new evidence for a hidden neoproterozoic foreland basin to the Grenville Orogen in the eastern Midwest, U.S.A
J.O.S. Santos, L.A. Hartmann, N.J. McNaughton, R. M. Easton, R.G. Rea, P.E. Potter
2002, Canadian Journal of Earth Sciences (39) 1505-1515
A sensitive high resolution ion microprobe (SHRIMP) was used in combination with backscattered electron (BSE) and cathodoluminescence (CL) images to determine the age of detrital zircons from sandstones in the Neoproterozoic Middle Run Formation of the eastern Midwest, United States. Eleven samples from seven drill cores of the upper part...
Antibody responses by chinook salmon (Oncorhynchus tshawytscha) and rainbow trout (Oncorhynchus mykiss) to various protein antigens
S.W. Alcorn, R.J. Pascho
2002, Fish and Shellfish Immunology (13) 327-333
[No abstract available]...
Dynamic fuzzy modeling of storm water infiltration in urban fractured aquifers
Y.-S. Hong, Michael R. Rosen, R.R. Reeves
2002, Journal of Hydrologic Engineering (7) 380-391
In an urban fractured-rock aquifer in the Mt. Eden area of Auckland, New Zealand, disposal of storm water is via "soakholes" drilled directly into the top of the fractured basalt rock. The dynamic response of the groundwater level due to the storm water infiltration shows characteristics of a strongly time-varying...
Changes during hibernation in different phospholipid and free and esterified cholesterol serum levels in black bears
V. Chauhan, A. Sheikh, A. Chauhan, J. Tsiouris, M. Malik, M. Vaughan
2002, Biochimie (84) 1031-1034
During hibernation, fat is known to be the preferred source of energy. A detailed analysis of different phospholipids, as well as free and esterified cholesterol, was conducted to investigate lipid abnormalities during hibernation. The levels of total phospholipids and total cholesterol in the serum of black bears were found to...
Upper-mantle origin of the Yellowstone hotspot
R.L. Christiansen, G.R. Foulger, J.R. Evans
2002, Geological Society of America Bulletin (114) 1245-1256
Fundamental features of the geology and tectonic setting of the northeast-propagating Yellowstone hotspot are not explained by a simple deep-mantle plume hypothesis and, within that framework, must be attributed to coincidence or be explained by auxiliary hypotheses. These features include the persistence of basaltic magmatism along the hotspot track, the...
The role of the egg jelly coat in protecting Hyla regilla and Bufo canorus embryos from Ultraviolet B radiation during development
L.J. Hansen, D. L. Fabacher, R. Calfee
2002, Environmental Science and Pollution Research (9) 412-416
Background. Previous studies have suggested that Ultraviolet B (UVB) radiation may play a role in amphibian population declines. Some of these studies also indicate that egg hatching success is unaltered in some species of anurans as a result of UVB exposure. It has been proposed that the egg mass jelly...
Vegetation and climate controls on potential CO2, DOC and DON production in northern latitude soils
J. C. Neff, D.U. Hooper
2002, Global Change Biology (8) 872-884
Climatic change may influence decomposition dynamics in arctic and boreal ecosystems, affecting both atmospheric CO2 levels, and the flux of dissolved organic carbon (DOC) and dissolved organic nitrogen (DON) to aquatic systems. In this study, we investigated landscape-scale controls on potential production of these compounds using a one-year laboratory incubation...
AVHRR channel selection for land cover classification
S.K. Maxwell, R.M. Hoffer, P.L. Chapman
2002, International Journal of Remote Sensing (23) 5061-5073
Mapping land cover of large regions often requires processing of satellite images collected from several time periods at many spectral wavelength channels. However, manipulating and processing large amounts of image data increases the complexity and time, and hence the cost, that it takes to produce a land cover map. Very...
A test of "Annual resolution" in stalagmites using tree rings
J.L. Betancourt, H. D. Grissino-Mayer, M.W. Salzer, T.W. Swetnam
2002, Quaternary Research (58) 197-199
So-called annual banding has been identified in a number of speleothems in which the number of bands approximates the time interval between successive U-series dates. The apparent annual resolution of speleothem records, however, remains largely untested. Here we statistically compare variations in band thickness from a late Holocene stalagmite in...
Epizootiology and effect of avian pox on Hawaiian forest birds
Charles van Riper III, Sandra G. van Riper, Wallace R. Hansen
2002, The Auk (119) 929-942
We determined prevalence and altitudinal distribution of forest birds infected with avian pox at 16 locations on Hawaii, from sea level to tree line in mesic and xeric habitats, during 1977–1980. Isolates from lesions were cultured in the laboratory for positive identification of Poxvirus avium. Infected birds from the wild...
Space use, migratory connectivity, and population segregation among willets breeding in the western Great Basin
Susan M. Haig, Lewis W. Oring, Peter M. Sanzenbacher, Oriane W. Taft
2002, Condor (104) 620-630
Western Willets (Catoptrophorus semipalmatus inornatus) were banded (n = 146 breeding adults and chicks) and radio-marked (n = 68 adults) at three western Great Basin wetland complexes to determine inter- and intraseasonal space use and movement patterns (primarily in 1998 and 1999). Birds were then tracked to overwintering sites where...
Persistence of an unusual pelagic zooplankton assemblage in a clear, mountain lake
Gary L. Larson, Robert L. Hoffman, C. D. McIntire
2002, Hydrobiologia (468) 163-170
The planktonic zooplankton assemblage in Mowich Lake, Mount Rainier National Park (MORA), was composed almost entirely of rotifers in 1966 and 1967. Adult pelagic crustacean taxa were rare. Their paucity was attributed to predation by kokanee salmon (Oncorhynchus nerka), which had been stocked in 1961. During a park-wide survey of...
Optical characteristics of natural waters protect amphibians from UV-B in the U.S. Pacific Northwest
Wendy J. Palen, David E. Schindler, M. J. Adams, Christopher A. Pearl, R. Bruce Bury, S. A. Diamond
2002, Ecology (83) 2951-2957
Increased exposure to ultraviolet-B (UV-B) radiation has been proposed as a major environmental stressor leading to global amphibian declines. Prior experimental evidence from the U.S. Pacific Northwest (PNW) indicating the acute embryonic sensitivity of at least four amphibian species to UV-B has been central to the literature about amphibian decline....
