Mapping Chinese tallow with color-infrared photography
Elijah W. Ramsey III, G.A. Nelson, S.K. Sapkota, E.B. Seeger, K.D. Martella
2002, Photogrammetric Engineering and Remote Sensing (68) 251-255
Airborne color-infrared photography (CIR) (1:12,000 scale) was used to map localized occurrences of the widespread and aggressive Chinese tallow (Sapium sebiferum), an invasive species. Photography was collected during senescence when Chinese tallow's bright red leaves presented a high spectral contrast within the native bottomland hardwood and upland forests and marsh...
A near-surface, daytime occurrence of two mesopelagic fish species (Stenobrachius leucopsarus and Leuroglossus schmidti) in a glacial fjord
Alisa A. Abookire, John F. Piatt, Suzann G. Speckman
2002, Fishery Bulletin (100) 376-380
The northern lampfish (Stenobrachius leucopsarus, family Myctophidae) and northern smoothtongue (Leuroglossus schmidti, family Bathylagidae) are mesopelagic fishes, defined by their vertical distribution in the mesopelagic zone (200–1000 m) during daylight hours. Northern lampfish range from the Bering Sea to southern California (Shimada, 1948), where their abundance is highest along the...
Alkylcyclohexanes in environmental geochemistry
F. D. Hostettler, K.A. Kvenvolden
2002, Environmental Forensics (3) 293-301
The n-alkylated cyclohexanes (CHs) are a homologous series of hydrocarbon compounds that are commonly present in crude oil and refinery products such as diesel fuel. These compounds exhibit specific distribution patterns for different fuel types, providing useful fingerprints for characterizing petroleum products, especially after degradation of n-alkanes has occurred. However,...
Good medicine for conservation biology: The intersection of epidemiology and conservation theory
Kevin D. Lafferty, Leah R. Gerber
2002, Conservation Biology (16) 593-604
A survey of organochlorine residues in woodcock wings was undertaken to determine whether these wings are suitable for showing regional differences in residues and to obtain a baseline in 1970-71 for later comparisons. Woodcock wings were obtained from the annual hunter's wing survey. Samples came from eight States (Louisiana, Maine,...
Absolute irradiance of the Moon for on-orbit calibration
T.C. Stone, H. H. Kieffer
Barnes W.L., editor(s)
2002, Conference Paper, Proceedings of SPIE - The International Society for Optical Engineering
The recognized need for on-orbit calibration of remote sensing imaging instruments drives the ROLO project effort to characterize the Moon for use as an absolute radiance source. For over 5 years the ground-based ROLO telescopes have acquired spatially-resolved lunar images in 23 VNIR (Moon diameter ???500 pixels) and 9 SWIR...
Status of the preston white river springfish (Crenichthys baileyi albivallis)
G.G. Scoppettone, P.H. Rissler
2002, Western North American Naturalist (62) 82-87
We determined the distribution and estimated population number of Preston White River springfish (Crenichthys baileyi albivallis) in summer 1998 and winter 1999. The total population was <5000 fish persisting in only 4 of 6 spring systems from which it had been previously captured. To improve its status, we recommend conservation...
Morphology, volcanism, and mass wasting in Crater Lake, Oregon
C. R. Bacon, J.V. Gardner, L. A. Mayer, M.W. Buktenica, P. Dartnell, D.W. Ramsey, J.E. Robinson
2002, Geological Society of America Bulletin (114) 675-692
Crater Lake was surveyed nearly to its shoreline by high-resolution multibeam echo sounding in order to define its geologic history and provide an accurate base map for research and monitoring surveys. The bathymetry and acoustic backscatter reveal the character of landforms and lead to a chronology for the concurrent filling...
Microsatellite DNA and mitochondrial DNA variation in remnant and translocated sea otter (Enhydra lutris) populations
Shawn E. Larson, Ronald J. Jameson, James L. Bodkin, Michelle Staedler, Paul Bentzen
2002, Journal of Mammalogy (83) 893-906
All existing sea otter (Enhydra lutris) populations have suffered at least 1, and in some cases 2, population bottlenecks. The 1st occurred during the 18th and 19th centuries as a result of commercial hunting that eliminated sea otters from much their native range and reduced surviving populations to small remnants....
Characterization of arsenic species in microbial mats from an inactive gold mine
A. L. Foster, R. P. Ashley
2002, Geochemistry: Exploration, Environment, Analysis (2) 253-261
Filamentous cyanobacterial mats and Fe oxyhydroxide-rich bacterial mats collected near an inactive gold mine in California are enriched in arsenic (As) approximately 1000-fold relative to the waters in contact with them. The predominant organism in the cyanobacterial mat could not be identified using morphological characteristics, but the unique morphology of...
Habitat use and foraging behavior of Townsend's big-eared bat (Corynorhinus townsendii) in coastal California
Gary M. Fellers, Elizabeth D. Pierson
2002, Journal of Mammalogy (83) 167-177
Radiotracking studies of Townsend's big-eared bat (Corynorhinus townsendii) were conducted in grazed grassland and coastal forest (California bay, Douglas-fir, and redwood) at Point Reyes National Seashore in coastal central California. Radiotagged bats were used to determine the foraging patterns of both female and male bats and to locate alternate roost...
Conflict of interest between a nematode and a trematode in an amphipod host: Test of the "sabotage" hypothesis
Frederic Thomas, Jerome Fauchier, Kevin D. Lafferty
2002, Behavioral Ecology and Sociobiology (51) 296-301
Microphallus papillorobustus is a manipulative trematode that induces strong behavioural alterations in the gamaridean amphipod Gammarus insensibilis, making the amphipod more vulnerable to predation by aquatic birds (definitive hosts). Conversely, the sympatric nematodeGammarinema gammari uses Gammarus insensibilis as a habitat and a...
Temporal variation in community composition, pigmentation, and Fv/Fm of desert cyanobacterial soil crusts
M. A. Bowker, S.C. Reed, J. Belnap, S. L. Phillips
2002, Microbial Ecology (43) 13-25
Summers on the Colorado Plateau (USA) are typified by harsh conditions such as high temperatures, brief soil hydration periods, and high UV and visible radiation. We investigated whether community composition, physiological status, and pigmentation might vary in biological soil crusts as a result of such conditions. Representative surface cores were...
Clam density and scaup feeding behavior in San Pablo Bay, California
Victoria K. Poulton, James R. Lovvorn, John Y. Takekawa
2002, Condor (104) 518-527
San Pablo Bay, in northern San Francisco Bay, California, is an important wintering area for Greater (Aythya marila) and Lesser Scaup (A. affinis). We investigated variation in foraging behavior of scaup among five sites in San Pablo Bay, and whether such variation was related to densities of their main potential...
Age and origin of base and precious metal veins of the Coeur d'Alene mining district, Idaho
R.J. Fleck, R.E. Criss, G.F. Eaton, R.W. Cleland, C.S. Wavra, W.D. Bond
2002, Economic Geology (97) 23-42
Ore-bearing quartz-carbonate veins of the Coeur d'Alene mining district yield 87Sr/86Sr ratios of 0.74 to >1.60 for low Rb/Sr, carbonate gangue minerals, similar to current ranges measured in Middle Proterozoic, high Rb/Sr rocks of the Belt Supergroup. Stable isotope and fluid inclusion studies establish a genetic relationship between vein formation...
Spatial patterns in the abundance of the coastal horned lizard
Robert N. Fisher, Andrew V. Suarez, Ted J. Case
2002, Conservation Biology (16) 205-215
Coastal horned lizards ( Phrynosoma coronatum) have undergone severe declines in southern California and are a candidate species for state and federal listing under the Endangered Species Act. Quantitative data on their habitat use, abundance, and distribution are lacking, however. We investigated the determinants of abundance for coastal horned lizards at...
The 26 January 2001 M 7.6 Bhuj, India, earthquake: Observed and predicted ground motions
S. E. Hough, S. Martin, R. Bilham, G. M. Atkinson
2002, Bulletin of the Seismological Society of America (92) 2061-2079
Although local and regional instrumental recordings of the devastating 26, January 2001, Bhuj earthquake are sparse, the distribution of macroseismic effects can provide important constraints on the mainshock ground motions. We compiled available news accounts describing damage and other effects and interpreted them to obtain modified Mercalli intensities (MMIs) at...
Parasites and marine invasions
M.E. Torchin, K. D. Lafferty, A. M. Kuris
2002, Parasitology (124) 137-151
Introduced marine species are a major environmental and economic problem. The rate of these biological invasions has substantially increased in recent years due to the globalization of the world's economies. The damage caused by invasive species is often a result of the higher densities and larger sizes they attain compared...
Use of acoustic classification of sidescan sonar data for mapping benthic habitat in the Northern Channel Islands, California
Guy R. Cochrane, Kevin D. Lafferty
2002, Continental Shelf Research (22) 683-690
Highly reflective seafloor features imaged by sidescan sonar in nearshore waters off the Northern Channel Islands (California, USA) have been observed in subsequent submersible dives to be areas of thin sand covering bedrock. Adjacent areas of rocky seafloor, suitable as habitat for endangered species of abalone and rockfish, and encrusting...
The evolving benthic community
Janet K. Thompson
2002, Report, Science and strategies for restoration
No abstract available....
Thallium isotope variations in seawater and hydrogenetic, diagenetic, and hydrothermal ferromanganese deposits
M. Rehkamper, M. Frank, J.R. Hein, D. Porcelli, A. Halliday, J. Ingri, V. Liebetrau
2002, Earth and Planetary Science Letters (197) 65-81
Results are presented for the first in-depth investigation of TI isotope variations in marine materials. The TI isotopic measurements were conducted by multiple collector-inductively coupled plasma mass spectrometry for a comprehensive suite of hydrogenetic ferromanganese crusts, diagenetic Fe-Mn nodules, hydrothermal manganese deposits and seawater samples. The natural variability of TI...
Ontogenetic behavior and migration of Chinese sturgeon, Acipenser sinensis
P. Zhuang, B. Kynard, L. Zhang, T. Zhang, W. Cao
2002, Environmental Biology of Fishes (65) 83-97
The Chinese sturgeon, Acipenser sinensis, is an anadromous protected species that presently only spawns in the Yangtze River. Using laboratory experiments, we examined the behavioral preference of young Chinese sturgeon to physical habitat (water depth, illumination intensity, substrate color, and cover) and monitored their downstream migration. Hatchling free embryos were photopositive,...
Increasing diversity in our profession
Ronald D. Davis Sr., Samuel Diswood, Annette Dominguez, Ronald W. Engel-Wilson, Keith Jefferson, A. Keith Miles, Elizabeth F. Moore, Russell Reidinger, Sherry Ruther, Raul Valdez, Kenneth Wilson, Marilet A. Zablan
2002, Wildlife Society Bulletin (30) 628-633
The Wildlife Society's (TWS) Ethnic and Gender Diversity Committee (previously the Minority Affairs Committee) was established in 1998 and given several charges by TWS Council. This paper responds to our original charge to consider possi- ble actions and programs that TWS might undertake to increase minority participation in the...
Fecampia erythrocephala rediscovered: prevalence and distribution of a parasitoid of the European shore crab, Carcinus maenas
Armand M. Kuris, Mark E. Torchin, Kevin D. Lafferty
2002, Journal of the Marine Biological Association of the United Kingdom (82) 955-960
An ecological assessment of Fecampia erythrocephala, reporting its habitat distribution, abundance, host specificity, size-specific prevalence, frequency distribution among hosts, effect on host growth, and its site specificity within these hosts is presented. At the Isle of Man and near Plymouth, Fecampia erythrocephala cocoons were generally abundant on the...
Concentrations of chromium, manganese, and lead in air and in avian eggs
Clifford A. Hui
2002, Environmental Pollution (120) 201-206
The expansion of urbanization introduces air pollution to wildlife areas. Some metal contaminants occurring in concentrations too small to have any measurable impact on adult birds may seriously affect embryos that are more sensitive to contaminants than the adult. Chromium, manganese, and lead are toxic and can be passed from...
Lead burdens and behavioral impairments of the lined shore crab Pachygrapsus crassipes
Clifford A. Hui
2002, Ecotoxicology (11) 417-421
Sublethal burdens of lead impair behaviors critical to survival in a variety of animals. In a test arena, I measured refuge-seeking behaviors of adult, male, lined shore crabs from lead-free and lead-contaminated sites. The body sizes of the test groups did not differ although the mean total body lead burdens...
