Wildlife response to thinning young forests in the Pacific Northwest
J. P. Hayes, S.S. Chan, W.H. Emmingham, J. C. Tappeiner, L.D. Kellogg, J. D. Bailey
1997, Journal of Forestry (95) 28-33
No abstract available....
Kinetics of the coesite to quartz transformation
J.L. Mosenfelder, S.R. Bohlen
1997, Earth and Planetary Science Letters (153) 133-147
The survival of coesite in ultrahigh-pressure (UHP) rocks has important implications for the exhumation of subducted crustal rocks. We have conducted experiments to study the mechanism and rate of the coesite→quartz transformation using polycrystalline coesite aggregates, fabricated by devitrifying silica glass cylinders...
Soluble trace elements and total mercury in Arctic Alaskan snow
E. Snyder-Conn, John R. Garbarino, Gerald L. Hoffman, A. Oelkers
1997, Arctic (50) 201-215
Ultraclean field and laboratory procedures were used to examine trace element concentrations in northern Alaskan snow. Sixteen soluble trace elements and total mercury were determined in snow core samples representing the annual snowfall deposited during the 1993-94 season at two sites in the Prudhoe Bay oil field and nine sites...
Alternative interpretations of oil spill data
John F. Piatt
1997, BioScience (47) 202-203
In his article "Oil, Seabirds, and Science" (BioScience 46: 587-597), John Wiens attempted to review Exxon Valdez oil spill (EVOS) damage assessment studies and the politics of EVOS science in one stroke. In my opinion, neither purpose was particularly well served....
Modeling fish dynamics and effects of stress in a hydrologically pulsed ecosystem
Donald L. DeAngelis, William F. Loftus, Joel C. Trexler, Robert E. Ulanowicz
1997, Journal of Aquatic Ecosystem Stress and Recovery (6) 1-13
Many wetlands undergo seasonal cycles in precipitation and water depth.This environmental seasonality is echoed in patterns of production of fishbiomass, which, in turn, influence the phenology of other components of thefood web, including wading birds. Human activities, such as drainage orother alterations of the hydrology, can exacerbate these natural cycles...
Nitrogen metabolism of sheep and goats consuming Acacia brevispica and Sesbania sesban
A. Woodward, J.D. Reed
1997, Journal of Animal Science (75) 1130-1139
We described the effects of two East African browses, Acacia brevispica and Sesbania sesban, on nitrogen metabolism of sheep and goats. The A. brevispica had a substantial amount of proanthocyanidins (condensed tannins); S. sesban did not. The browses were fed at three levels in combination with vetch (Vicia dasycarpa) and...
Effects of drought and prolonged winter on Townsend's ground squirrel demography in shrubsteppe habitats
Beatrice Van Horne, Gail S. Olson, Robert L. Schooley, Janelle G. Corn, Kenneth P. Burnham
1997, Ecological Monographs (67) 295-315
During a mark–recapture study of Townsend's ground squirrels (Spermophilus townsendii) on 20 sites in the Snake River Birds of Prey National Conservation Area, Idaho, in 1991 through 1994, 4407 animals were marked in 17639 capture events. This study of differences in population dynamics of Townsend's ground squirrels among habitats spanned...
A research problem analysis in support of the Cooperative Forest Ecosystem Research (CFER) Program
Jeff P. Smith, Robert E. Gresswell, John P. Hayes
1997, Report
No abstract available....
Modelling root reinforcement in shallow forest soils
Arne E. Skaugset
1997, Thesis
A hypothesis used to explain the relationship between timber harvesting and landslides is that tree roots add mechanical support to soil, thus increasing soil strength. Upon harvest, the tree roots decay which reduces soil strength and increases the risk of management -induced landslides. The technical literature does not adequately support...
Long time-series of turbid coastal water using AVHRR: An example from Florida Bay, USA
R. P. Stumpf, M.L. Frayer
1997, Conference Paper, Proceedings of SPIE - The International Society for Optical Engineering
The AVHRR can provide information on the reflectance of turbid case II water, permitting examination of large estuaries and plumes from major rivers. The AVHRR has been onboard several NOAA satellites, with afternoon overpasses since 1981, offering a long time-series to examine changes in coastal water. We are using AVHRR...
Survival rates of adult lake trout in northwestern Lake Michigan, 1983-1993
Mary C. Fabrizio, Mark E. Holey, Patrick C. McKee, Michael L. Toneys
1997, North American Journal of Fisheries Management (17) 413-428
The restoration of lake trout Salvelinus namaycush in Lake Michigan has been an elusive goal of resource management agencies in the Great Lakes region. In this study, we estimated annual survival rates of adult lake trout from an area in northwestern Lake Michigan known as the Clay Banks refuge. We...
Data-collection methods and quality-assurance/quality-control procedures used in the study of episodic stream acidification and its effect on fish and aquatic invertebrates in four Catskill Mountain streams, New York, 1988-90
Anthony J. Ranalli, Barry P. Baldigo, Debra Horan-Ross, Ronald V. Allen
1997, Open-File Report 93-137
The U.S. Geological Survey, in cooperation with the U.S. Environmental Protection Agency, conducted a 20-month study during 1988-90 to evaluate the effects of episodic acidification on fish and aquatic invertebrates in pristine headwater streams in the Catskill Mountains of New York. The study was part of the Episodic Response Project,...
Canada Stream: A glacial meltwater stream in Taylor Valley, South Victoria Land, Antarctica
Diane M. McKnight, C. M. Tate
1997, Journal of the North American Benthological Society (16) 14-17
No abstract available....
Collection and analysis of traditional ecological knowledge about a population of arctic tundra caribou
Michael A.D. Ferguson, Francois Messier
1997, Arctic (50) 17-28
Aboriginal peoples want their ecological knowledge used in the management of wildlife populations. To accomplish this, management agencies will need regional summaries of aboriginal knowledge about long-term changes in the distribution and abundance of wildlife populations and ecological factors that influence those changes. Between 1983 and 1994, we developed a...
Assessment of United States gas hydrate resources
T. S. Collett
1997, ACS Division of Fuel Chemistry, Preprints (42) 457-461
[No abstract available]...
Buzzwords and debate about the human future
A.H. Lachenbruch
1997, GSA Today (7) 12-14
[No abstract available]...
Shaded-relief map of the San Francisco Bay region, California
Scott E. Graham, Richard J. Pike
1997, Open-File Report 97-745-B
No abstract available....
Water management and cottonwood forest dynamics along prairie streams
Jonathan M. Friedman, Michael L. Scott, Gregor T. Auble
Fritz L. Knopf, Fred B. Samson, editor(s)
1997, Book chapter, Ecological Studies 125: Ecology and conservation of Great Plains vertebrates
No abstract available....
Reassessment of metals criteria for aquatic life protection
S. N. Luoma, Others
H.L. Bergman, E. J. Dorward-King, editor(s)
1997, Book chapter, Proceedings, SETAC Pellston Conference, 1996
No abstract available....
Pharyngeal teeth of the freshwater drum (Aplodinotus grunniens) a predator of the zebra mussel (Dreissena polymorpha)
John R. P. French III
1997, Journal of Freshwater Ecology (12) 495-498
The morphology of pharyngeal teeth of freshwater drum (Aplodinotus grunniens) was studied to determine changes that occur during growth of drum that may relate to consumption of zebra mussel (Dreissena polymorpha) by larger fish. Pharyngeal teeth were of three types. Cardiform teeth were replaced by villiform teeth, which were replaced...
Characterization and application of a quantitative DNA marker that discriminates sex in chinook salmon (Oncorhynchus tshawytscha)
D.R. Clifton, R. J. Rodriguez
1997, Canadian Journal of Fisheries and Aquatic Sciences (54) 2647-2652
A qualitative male-specific DNA marker (OT-24) was amplified by spPCR (single-primer polymerase chain reaction) from chinook salmon (Oncorhynchus tshawytscha) DNA along with several non-sex-linked products. The termini of the male-specific product were sequenced, and a pair of PeR primers were constructed for marker-specific PCR amplification. Dual primer PCR (dpPCR), with...
The design of sampling transects for characterizing water quality in estuaries
A.D. Jassby, B.E. Cole, J. E. Cloern
1997, Estuarine, Coastal and Shelf Science (45) 285-302
The high spatial variability of estuaries poses a challenge for characterizing estuarine water quality. This problem was examined by conducting monthly high-resolution transects for several water quality variables (chlorophyll a, suspended particulate matter and salinity) in San Francisco Bay (California, U.S.A.). Using these data,...
Foods of northern fulmars associated with high-seas drift nets in the transitional region of the North Pacific
Patrick J. Gould, William Walker, Peggy H. Ostrom
1997, Northwestern Naturalist (78) 57-61
We examined digestive tract contents and nitrogen stable isotope ratios in breast muscles of northern fulmars (Fulmarus glacialis) salvaged from squid and large-mesh drift nets in the transitional North Pacific. Lantern fishes (Myctophidae) were the principal prey item found in the digestive tracts. Pieces of unidentified fishes (probably Pacific pomfret...
Photometric stability of the lunar surface
H. H. Kieffer
1997, Icarus (130) 323-327
The rate at which cratering events currently occur on the Moon is considered in light of their influence on the use of the Moon as a radiometric standard. The radiometric effect of small impact events is determined empirically from the study of Clementine images. Events that would change the integral...
Initiation and growth of gypsum piercement structures in the Zechstein Basin
S. C. Williams-Stroud, J. Paul
1997, Journal of Structural Geology (19) 897-907
The importance of tectonic processes in initiating halite diapirs has become much better understood in recent years. Less well understood is the development of diapiric structures involving rocks composed predominantly of gypsum. Below about 1000 m, gypsum dehydrates to anhydrite, which...
