Impact source determination with biomonitoring data in New York State: Concordance with environmental data
Karen Riva-Murray, Robert W. Bode, Patrick J. Phillips, Gretchen L. Wall
2002, Northeastern Naturalist (9) 127-162
No abstract available....
Satellite imagery for volcanic hazards mitigation
Rosalind Tuthill Helz, G.A. Ellrod, G. Wadge
2002, Conference Paper, International Geoscience and Remote Sensing Symposium (IGARSS)
The Committee on Earth Observation Satellites (CEOS) seeks to foster cooperation to increase the usefulness and accessibility of satellite imagery. In 1997, CEOS initiated the Disaster Management Support Project to assess the present and potential use of satellite-derived information for volcanic hazards mitigation. The final report of the CEOS Volcanic...
Recharge and groundwater models: An overview
W. Sanford
2002, Hydrogeology Journal (10) 110-120
Recharge is a fundamental component of groundwater systems, and in groundwater-modeling exercises recharge is either measured and specified or estimated during model calibration. The most appropriate way to represent recharge in a groundwater model depends upon both physical factors and study objectives. Where the water table is close to the...
Resident fish assemblages in shallow shorelines of a Columbia River impoundment
C.A. Barfoot, D.M. Gadomski, J.H. Petersen
2002, Northwest Science (76) 103-117
During May-September 1995, we replicated an earlier (1984-85) study of fishes in shoreline habitats of the John Day Reservoir, Columbia River, to investigate fish assemblage structure at several spatial and temporal scales. A total of 37,400 resident fishes representing 24 taxa was collected in 359 beach seine hauls. Fish catch...
Response of benthic algae to environmental gradients in an agriculturally dominated landscape
M.D. Munn, R. W. Black, S.J. Gruber
2002, Journal of the North American Benthological Society (21) 221-237
Benthic algal communities were assessed in an agriculturally dominated landscape in the Central Columbia Plateau, Washington, to determine which environmental variables best explained species distributions, and whether algae species optima models were useful in predicting specific water-quality parameters. Land uses in the study area included forest, range, urban, and agriculture....
Environmental contaminants in prey and tissues of the peregrine falcon in the Big Bend Region, Texas, USA.
M. Mora, R. Skiles, B. McKinney, M. Paredes, D. Buckler, D. Papoulias, D. Klein
2002, Environmental Pollution (116) 169-176
Peregrine falcons (Falco peregrinus) have been recorded nesting in Big Bend National Park, Texas, USA and other areas of the Chihuahuan Desert since the early 1900s. From 1993 to 1996, peregrine falcon productivity rates were very low and coincided with periods of low rainfall. However, low productivity also was suspected...
Porometric properties of siliciclastic marine sand: A comparison of traditional laboratory measurements with image analysis and effective medium modeling
A.H. Reed, K.B. Briggs, D. L. Lavoie
2002, IEEE Journal of Oceanic Engineering (27) 581-592
During the 1999 sediment acoustics experiment (SAX99), porometric properties were measured and predicted for a well sorted, medium sand using standard laboratory geotechnical methods and image analysis of resin-impregnated sediments. Sediment porosity measured by laboratory water-weight-loss methods (0.372 ?? 0.0073 for mean ??1 standard deviation) is 0.026 lower than determined...
Comparison of stomach contents of haddock (Melanogrammus aeglefinus) from the 1981 and 1991 North Sea International Stomach Sampling Projects
S.A. Adlerstein, A. Temming, N. Mergardt
2002, ICES Journal of Marine Science (59) 497-515
This study analyses data from over 20 000 haddock stomachs collected during the 1981 and 1991 Stomach Sampling Projects of the North Sea. Sampling was within the framework of the Multispecies Virtual Population Analysis (MSVPA) for fisheries stock assessment. In 1981 stomachs were collected to calculate input feeding parameters from...
Long-term dynamics of winter and summer annual communities in the Chihuahuan Desert
Qinfeng Guo, James H. Brown, T. J. Valone
2002, Journal of Vegetation Science (13) 575-584
Winter and summer annuals in the Chihuahuan Desert have been intensively studied in recent years but little is known about the similarities and differences in the dynamics between these two communities. Using 15 yr of census data from permanent quadrats, this paper compared the characteristics and temporal dynamics of these...
Drainage reversals in Mono Basin during the late pliocene and Pleistocene
M.C. Reheis, S. Stine, A.M. Sarna-Wojcicki
2002, Geological Society of America Bulletin (114) 991-1006
Mono Basin, on the eastern flank of the central Sierra Nevada, is the highest of the large hydrographically closed basins in the Basin and Range province. We use geomorphic features, shoreline deposits, and basalt-filled paleochannels to reconstruct an early to middle Pleistocene record of shorelines and changing spillways of Lake...
Effects of canopy gaps and flooding on homopterans in a bottomland hardwood forest
L.E. Gorham, S.L. King, B. D. Keeland, S. Mopper
2002, Wetlands (22) 541-549
Canopy disturbance is a major factor affecting forest structure and composition and, as a result of habitat alterations, can influence insect communities. We initiated a field study to quantify the effects of canopy disturbance on aerial insect abundance and distribution within a bottomland hardwood forest along the Cache River, Arkansas,...
Mercury contamination from historic mining in water and sediment, Guadalupe River and San Francisco Bay, California
M.A. Thomas, C.H. Conaway, D.J. Steding, M. Marvin-DiPasquale, K. E. Abu-Saba, A.R. Flegal
2002, Geochemistry: Exploration, Environment, Analysis (2) 211-217
The New Almaden mercury mines in California (USA), which collectively represent the largest historic producers of mercury in North America, are a persistent source of mercury contamination to the San Francisco Bay estuary. An estimate based on total mercury concentration (HgTOT) and provisional stream flow data measured at a gauging...
In‐stream sorption of fulvic acid in an acidic stream: A stream‐scale transport experiment
Diane M. McKnight, George M. Hornberger, Kenneth E. Bencala, Elizabeth W. Boyer
2002, Water Resources Research (38) 6-1-6-12
The variation of concentration and composition of dissolved organic carbon (DOC) in stream waters cannot be explained solely on the basis of soil processes in contributing subcatchments. To investigate in‐stream processes that control DOC, we injected DOC‐enriched water into a reach of the Snake River (Summit County, Colorado) that has...
The significance of pockmarks to understanding fluid flow processes and geohazards
M. Hovland, J.V. Gardner, A.G. Judd
2002, Geofluids (2) 127-136
Underwater gas and liquid escape from the seafloor has long been treated as a mere curiosity. It was only after the advent of the side-scan sonar and the subsequent discovery of pockmarks that the scale of fluid escape and the moonlike terrain on parts of the ocean floor became generally...
Allocation of extracellular enzymatic activity in relation to litter composition, N deposition, and mass loss
R. L. Sinsabaugh, M.M. Carreiro, D.A. Repert
2002, Biogeochemistry (60) 1-24
Decomposition of plant material is a complex process that requires interaction among a diversity of microorganisms whose presence and activity is subject to regulation by a wide range of environmental factors. Analysis of extracellular enzyme activity (EEA) provides a way to relate the functional organization of microdecomposer communities to environmental...
Transport of suspended solids from a karstic to an alluvial aquifer: The role of the karst/alluvium interface
N. Massei, M. Lacroix, H.Q. Wang, B.J. Mahler, J.P. Dupont
2002, Journal of Hydrology (260) 88-101
This study focuses on the coupled transport of dissolved constituents and particulates, from their infiltration on a karst plateau to their discharge from a karst spring and their arrival at a well in an alluvial plain. Particulate markers were identified and the transport of solids was characterised in situ in...
Hydrocarbon geochemistry of cold seeps in the Monterey Bay National Marine Sanctuary
T.D. Lorenson, K.A. Kvenvolden, F. D. Hostettler, R.J. Rosenbauer, D.L. Orange, J.B. Martin
2002, Marine Geology (181) 285-304
Samples from four geographically and tectonically discrete cold seeps named Clam Flat, Clamfield, Horseshoe Scarp South, and Tubeworm City, within the Monterey Bay National Marine Sanctuary were analyzed for their hydrocarbon content. The sediment contains gaseous hydrocarbons and CO2, as well as high molecular weight aliphatic and aromatic hydrocarbons with...
Holocene vegetation and climate history of the northern Bighorn Basin, southern Montana
M.E. Lyford, J.L. Betancourt, S.T. Jackson
2002, Quaternary Research (58) 171-181
Records of Holocene vegetation and climate change at low elevations (<2000 m) are rare in the central Rocky Mountain region. We developed a record of Holocene vegetation and climate change from 55 14C-dated woodrat middens at two low-elevation sites (1275 to 1590 m, currently vegetated by Juniperus osteosperma woodlands, in...
Age, growth, and gonadal characteristics of adult bighead carp, Hypophthalmichthys nobilis, in the lower Missouri River
S.J. Schrank, C.S. Guy
2002, Environmental Biology of Fishes (64) 443-450
Bighead carp were introduced into Arkansas in 1973 to improve water clarity in production ponds. Bighead carp subsequently escaped aquaculture facilities in the early 1980's and dispersed into the Mississippi and Missouri rivers. The first documentation of bighead carp reproduction in the Mississippi River system was in 1989. The population...
Major areas of ground-water development; Escalante Valley, Beryl-Enterprise area
H.K. Christiansen, Carole B. Burden
2002, Cooperative Investigations Report 43
No abstract available. ...
Effects of bull elk demographics on age categories of harem bulls
Louis C. Bender
2002, Wildlife Society Bulletin (30) 193-199
Many management strategies for elk (Cervus elaphus) emphasize increasing numbers of mature bulls in the population. These strategies are usually assumed to enhance productivity via increased breeding by mature bulls. I compared age classes of harem bulls during the peak of the rut under 4 bull harvest strategies that resulted...
Cassini/VIMS observations of the moon
G. Belluci, R. H. Brown, V. Formisano, K. H. Baines, J.-P. Bibring, B. J. Buratti, F. Capaccioni, P. Cerroni, R. N. Clark, A. Coradini, D. P. Cruikshank, P. Drossart, R. Jaumann, Y. Langevin, D. L. Matson, T. B. McCord, V. Mennella, E. Miller, R.M. Nelson, P. D. Nicholson, B. Sicardy, Christophe Sotin
2002, Advances in Space Research (30) 1889-1894
In this paper, we present preliminary scientific results obtained from the analysis of VIMS (Visible and Infrared Mapping Spectrometer) lunar images and spectra. These data were obtained during the Cassini Earth flyby in August 1999. Spectral ratios have been produced in order to derive lunar mineralogical maps. Some spectra observed...
Baseline assessment of instream and riparian-zone biological resources on the Rio Grande in and near Big Bend National Park, Texas
James Bruce Moring
2002, Water-Resources Investigations Report 2002-4106
Five study sites, and a sampling reach within each site, were established on the Rio Grande in and near Big Bend National Park in 1999 to provide the National Park Service with data and information on the status of stream habitat, fish communities, and benthic macroinvertebrates. Differences in stream-habitat conditions...
Seafloor geology of the Monterey Bay area continental shelf
S.L. Eittreim, R. J. Anima, A.J. Stevenson
2002, Marine Geology (181) 3-34
Acoustic swath-mapping of the greater Monterey Bay area continental shelf from Point An??o Nuevo to Point Sur reveals complex patterns of rock outcrops on the shelf, and coarse-sand bodies that occur in distinct depressions on the inner and mid-shelves. Most of the rock outcrops are erosional cuestas of dipping Tertiary...
Calibration and temperature correction of heat dissipation matric potential sensors
A. L. Flint, G. S. Campbell, K. M. Ellett, C. Calissendorff
2002, Soil Science Society of America Journal (66) 1439-1445
This paper describes how heat dissipation sensors, used to measure soil water matric potential, were analyzed to develop a normalized calibration equation and a temperature correction method. Inference of soil matric potential depends on a correlation between the variable thermal conductance of the sensor's porous ceramic and matric potential. Although...
