Sirenia and sea otters sections
G. B. Rathbun
J. E. Reynolds III, S.A. Rommel, editor(s)
1999, Book chapter, Biology of marine mammals
No abstract available....
Breeding plan to preserve the genetic variability of the Kootenai River white sturgeon: Appendix D
H. L. Kincaid
1999, Book chapter, Recovery Plan for the White Sturgeon (Acipenser transmontanus): Kootenai River Population, U.S.
No abstract available at this time...
Ecology of female northern pintails during winter in the San Joaquin Valley, California
J. P. Fleskes
1999, Thesis
No abstract available at this time...
Macroinvertebrate biomonitoring protocol for four prairie streams
J.T. Peterson, W.M. Rizzo, E.D. Schneider, G.D. Willson
1999, Report
Second year of surveying for fishes on the Santa Margarita River, San Diego and Riverside counties, California: September-December, 1998
Robert N. Fisher, C. C. Swift
1999, Report
No abstract available at this time...
Effects of management practices on grassland birds: Upland Sandpiper
Jill A. Dechant, Meghan F. Dinkins, Douglas H. Johnson, Lawrence D. Igl, Christopher M. Goldade, Barry D. Parkin, Betty R. Euliss
1999, Report, Effects of management practices on grassland birds
Information on the habitat requirements and effects of habitat management on grassland birds were summarized from information in more than 5,500 published and unpublished papers. A range map is provided to indicate the relative densities of the species in North America, based on Breeding Bird Survey (BBS) data. Although birds...
Effects of management practices on grassland birds: American Bittern
Jill A. Dechant, Marriah L. Sondreal, Douglas H. Johnson, Lawrence D. Igl, Christopher M. Goldade, Amy L. Zimmerman, Betty R. Euliss
1999, Report, Effects of management practices on grassland birds
Information on the habitat requirements and effects of habitat management on grassland birds were summarized from information in more than 5,500 published and unpublished papers. A range map is provided to indicate the relative densities of the species in North America, based on Breeding Bird Survey (BBS) data. Although birds...
Do mini-refuges supply wintering northern pintails with important diurnal roost sites?: Response to Rave
R. R. Cox Jr., A. D. Afton
1999, Wildlife Society Bulletin (27) 901-903
No abstract available....
Effect of illite particle shape on cesium sorption
Pavol Rajec, Vladimir Sucha, Dennis D. Eberl, Jan Srodon, Francoise E. Elsass
1999, Clays and Clay Minerals (47) 755-760
Samples containing illite and illite-smectite, having different crystal shapes (plates, “barrels”, and filaments), were selected for sorption experiments with cesium. There is a positive correlation between total surface area and Cs-sorption capacity, but no correlation between total surface area and the distribution coefficient, Kd. Generally Kd increases with the edge...
Habitat management plan for butterfly species at Homestead National Monument
S. Mahady, D. Debinski
1999, Report
The Grasslands Ecosystem Initiative
Douglas H. Johnson, D.L. Larson
1999, Ecological Restoration (17) 174-175
Abstract has not been submitted...
Functional convergence among pelagic sculpins of Lake Baikal and deepwater ciscoes of the Great Lakes
Randy L. Eshenroder, Valentina G. Sideleva, Thomas N. Todd
1999, Journal of Great Lakes Research (25) 847-855
The vast, well-oxygenated hypolimnia of Lake Baikal and the Great Lakes were both dominated by endemic planktivorous fishes. These dominants, two species of sculpins (Comephorus, Comephoridae) in Lake Baikal and six species of deepwater ciscoes (Coregonus, Salmonidae) in the Great Lakes, although distant taxonomically, have morphologies suggesting a surprising degree...
Mortality of riparian box elder from sediment mobilization and extended inundation
Jonathan M. Friedman, Gregor T. Auble
1999, Regulated Rivers: Research & Management (15) 463-476
To explore how high flows limit the streamward extent of riparian vegetation we quantified the effects of sediment mobilization and extended inundation on box elder (Acer negundo) saplings along the cobble-bed Gunnison River in Black Canyon of the Gunnison National Monument, Colorado, USA. We counted and aged box elders in...
Natural attenuation of chlorinated volatile organic compounds in a freshwater tidal wetland: Field evidence of anaerobic biodegradation
Michelle M. Lorah, Lisa D. Olsen
1999, Water Resources Research (35) 3811-3827
Field evidence collected along two groundwater flow paths shows that anaerobic biodegradation naturally attenuates a plume of chlorinated volatile organic compounds as it discharges from an aerobic sand aquifer through wetland sediments. A decrease in concentrations of two parent contaminants, trichloroethylene (TCE) and 1,1,2,2‐tetrachloroethane (PCA), and a...
Clathrate eustasy: Methane hydrate melting as a mechanism for geologically rapid sea-level fall
J.F. Bratton
1999, Geology (27) 915-918
Although submarine methane hydrates or clathrates have been highlighted as potential amplifiers of modern global climate change and associated glacio-eustatic sea-level rise, their potential role in sea-level fall has not been appreciated. Recent estimates of the total volume occupied by gas hydrates in marine sediments vary 20-fold, from 1.2 ×...
Techniques for restoration of disturbed coastal wetlands of the Great Lakes
Douglas A. Wilcox, Thomas H. Whillans
1999, Wetlands (19) 835-857
A long history of human-induced degradation of Great Lakes wetlands has made restoration a necessity, but the practice of wetland restoration is relatively new, especially in large lake systems. Therefore, we compiled tested methods and developed additional potential methods based on scientific understanding of Great Lakes wetland ecosytems to providc...
Relation of streams, lakes, and wetlands to groundwater flow systems
T. C. Winter
1999, Hydrogeology Journal (7) 28-45
Surface-water bodies are integral parts of groundwater flow systems. Groundwater interacts with surface water in nearly all landscapes, ranging from small streams, lakes, and wetlands in headwater areas to major river valleys and seacoasts. Although it generally is assumed that topographically high areas are groundwater recharge...
Dynamic 3D simulations of earthquakes on en echelon faults
R.A. Harris, S.M. Day
1999, Geophysical Research Letters (26) 2089-2092
One of the mysteries of earthquake mechanics is why earthquakes stop. This process determines the difference between small and devastating ruptures. One possibility is that fault geometry controls earthquake size. We test this hypothesis using a numerical algorithm that simulates spontaneous rupture propagation in a three-dimensional...
Middle Miocene paleotemperature anomalies within the Franciscan Complex of northern California: Thermo-tectonic responses near the Mendocino triple junction
M.B. Underwood, K.L. Shelton, R. J. McLaughlin, M.M. Laughland, R.M. Solomon
1999, Geological Society of America Bulletin (111) 1448-1467
This study documents three localities in the Franciscan accretionary complex of northern California, now adjacent to the San Andreas fault, that were overprinted thermally between 13.9 and 12.2 Ma: Point Delgada-Shelter Cove (King Range terrane); Bolinas Ridge (San Bruno Mountain terrane); and Mount San Bruno (San Bruno Mountain terrane). Vein...
A siphon gage for monitoring surface-water levels
Timothy D. McCobb, Denis R. LeBlanc, Roy S. Socolow
1999, Journal of the American Water Resources Association (35) 1141-1146
A device that uses a siphon tube to establish a hydraulic connection between the bottom of an onshore standpipe and a point at the bottom of a water body was designed and tested for monitoring surface-water levels. Water is added to the standpipe to a level sufficient to drive a...
Aeromagnetic legacy of early Paleozoic subduction along the Pacific margin of Gondwana
Carol A. Finn, D. Moore, D. Damaske, T. Mackey
1999, Geology (27) 1087-1090
Comparison of the aeromagnetic signatures and geology of southeastern Australia and northern Victoria Land, Antarctica, with similar data from ancient subduction zones in California and Japan, provides a framework for reinterpretation of the plate tectonic setting of the Pacific margin of early Paleozoic Gondwana. In our model, the plutons in...
Microsatellite diversity in sympatric reproductive ecotypes of pacific steelhead (Oncorhynchus mykiss) from the Middle Fork Eel River, California
J.L. Nielsen, Monique C. Fountain
1999, Ecology of Freshwater Fish (8) 159-168
Genetic differentiation between two reproductive ecotypes of anadromous steelhead found in the Middle Fork Eel River in northern California was tested using 16 microsatellite loci. Twelve of these loci showed significant differences in allelic frequency between the two Middle Fork Eel River steelhead populations (Fisher's exact P<0.05). Fisher's combined test...
Holocene chronology for lunette dune deposition on the Southern High Plains, USA
J. Rich, S. Stokes, W.W. Wood
1999, Conference Paper, Zeitschrift fur Geomorphologie, Supplementband
Lunettes flank the margins of numerous ephemeral lakes that occur across the Southern High Plains of the United States. While their genesis is closely associated with the hydrology of the adjacent lake systems, the detailed inter-relationships between climate changes and geomorphological and hydrological changes upon the lake-lunette system has been...
Sources of nitrate in water from springs and the Upper Floridan aquifer, Suwannee River basin, Florida
B. G. Katz, H.D. Hornsby, J.K. Bohlke
1999, IAHS-AISH Publication (257) 117-124
In the Suwannee River basin of northern Florida, nitrate-N concentrations are 1.5 to 20 mg 1-1 in waters of the karstic Upper Floridan aquifer and in springs that discharge into the middle reach of the Suwannee River. During 1996-1997, fertilizers and animal wastes from farming operations in Suwannee County contributed...
Deglacial and lake level fluctuation history recorded in cores, Beaver Lake, Upper Peninsula, Michigan
Timothy G. Fisher, Richard L. Whitman
1999, Journal of Great Lakes Research (25) 263-274
Sediment cores collected from the littoral and pelagic zones of Beaver Lake, Michigan record fluctuations in the water level of Lake Superior. Beaver Lake is a small 300 ha lake in Pictured Rocks National Lakeshore (PRNL) now separated from Lake Superior...
