Health of native riparian vegetation and its relation to hydrologic conditions along the Mojave River, southern California
Gregory C. Lines
1999, Water-Resources Investigations Report 99-4112
The health of native riparian vegetation and its relation to hydrologic conditions were studied along the Mojave River mainly during the growing seasons of 1997 and 1998. The study concentrated on cottonwood-willow woodlands (predominantly Populus fremontii and Salix gooddingii) and mesquite bosques (predominantly Prosopis glandulosa). Tree-growth characteristics were measured at...
Outcome of aggressive interactions between American black ducks and mallards during the breeding season
D.G. McAuley, D.A. Clugston, J. R. Longcore
1998, Journal of Wildlife Management (62) 134-141
American black duck (Anas rubripes) numbers have declined during the past several decades, while mallards (A. platyrhynchos) have expanded their range eastward. Competitive exclusion of black ducks from wetlands by mallards has been proposed as a principal cause of the decline. We studied a sympatric population of black ducks and...
Impact of a rare storm event on an Amazonian forest
M.S. Foster, J. Terborgh
1998, Biotropica (30) 470-474
Elevation maps of the San Francisco Bay region, California, a digital database
Scott E. Graham, Richard J. Pike
1998, Open-File Report 98-625
PREFACE: Topography, the configuration of the land surface, plays a major role in various natural processes that have helped shape the ten-county San Francisco Bay region and continue to affect its development. Such processes include a dangerous type of landslide, the debris flow (Ellen and others, 1997) as well...
Effects of farming systems on ground-water quality at the management systems evaluation area near Princeton, Minnesota, 1991-95
M.K. Landon, G. N. Delin, J.A. Lamb, J. L. Anderson, R.H. Dowdy
1998, Water-Resources Investigations Report 98-4128
Ground-water quality in an unconfined sand and gravel aquifer was monitored during 1991-95 at the Minnesota Management Systems Evaluation Area (MSEA) near Princeton, Minnesota. The objectives of the study were to: (1) describe the effects of three farming systems on groundwater quality, and (2) evaluate the factors affecting ground-water quality and transport...
Regional rainfall-runoff relations for simulation of streamflow for watersheds in Du Page County, Illinois
James J. Duncker, Charles S. Melching
1998, Water-Resources Investigations Report 98-4035
Rainfall and streamflow data collected from July 1986 through September 1993 were utilized to calibrate and verify a continuous-simulation rainfall-runoff model for three watersheds (11.8--18.0 square miles in area) in Du Page County. Classification of land cover into three categories of pervious (grassland, forest/wetland, and agricultural land) and one category...
Slope maps of the San Francisco Bay region, California: A digital database
Scott E. Graham, Richard J. Pike
1998, Open-File Report 98-766
PREFACE: Topography, the configuration of the land surface, plays a major role in various natural processes that have helped shape the ten-county San Francisco Bay region and continue to affect its development. Such processes include a dangerous type of landslide, the debris flow (Ellen and others, 1997) as well...
Mineral resource appraisal of the Salmon National Forest, Idaho
Rick Johnson, Terry Close, Ed McHugh
1998, Open-File Report 98-478
The Salmon National Forest administers 1,776,994 net acres of mountainous terrain located in east-central Idaho. Most of the Forest is in Lemhi County; only a small portion falls within Idaho and Valley Counties. Approximately 426,114 acres of the Frank Church-River of No Return Wilderness extends into the western part of...
Geochemical studies of rare earth elements in the Portuguese pyrite belt, and geologic and geochemical controls on gold distribution
David J. Grimes, Robert L. Earhart, Delfim de Carvalho, Vitor Oliveira, Jose T. Oliveira, Paulo Castro
1998, Professional Paper 1596
This report describes geochemical and geological studies which were conducted by the U.S. Geological Survey (USGS) and the Servicos Geologicos de Portugal (SPG) in the Portuguese pyrite belt (PPB) in southern Portugal. The studies included rare earth element (REE) distributions and geological and geochemical controls on the distribution of gold....
Human influences on trophic cascades along rocky shores
D. R. Lindberg, James A. Estes, Kenneth I. Warheit
1998, Ecological Applications (8) 880-890
A three-trophic-level interaction among American Black Oystercatchers (Haematopus bachmani), limpets (Lottia spp.), and erect fleshy algae in rocky intertidal communities of central and southern California was documented via manipulative and “natural” experiments. Removal of the territorial limpet (Lottia gigantea) initially caused large increases in the percent cover of erect fleshy algae,...
Aspects of light rare earth element resources, Bayan Obo, China
D. M. Sutphin, L.J. Drew
1998, Open-File Report 98-125
Ou (Psittirostra psittacea)
Thomas J. Snetsinger, Michelle H. Reynolds, Christina M. Herrmann
1998, Birds of North America No. 335
The ‘Ö‘ü and the Läna‘i Hookbill are plump, predominantly olive green, thick-billed Hawaiian honeycreepers. The ‘Ö‘ü is now very rare and restricted to remote, high-elevation native forest, and the Läna‘i Hookbill is extinct. They are closely related species, belonging to a specialized tribe, Psittirostrini, consisting of nine historically known Hawaiian...
Summary of ground-water quality in West Virginia
M.V. Mathes, Mark D. Kozar, David P. Brown
1998, Report
Water-quality data for the 28 sites in the West Virginia ambient ground-water-quality network and for wells in the U.S. Geological Survey National Water Information System (NWIS) data base for West Virginia were analyzed statistically to identify any water-quality trends and relations and to compare data from the two data sets....
Flooding and forest succession in a modified stretch along the Upper Mississippi River
Yao Yin
1998, Regulated Rivers: Research & Management (14) 217-225
This research examines the effect of a rare flood on floodplain forest regeneration in a 102-km stretch of the Mississippi River beginning 21 km above the mouth of the Ohio River. The river has been restricted by levees and navigation structures and subjected to sediment dredging to maintain a stable...
Sedimentary facies and environmental ichnology of a ?Permian playa-lake complex in western Argentina
G. Zhang, L.A. Buatois, M.G. Mangano, F.G. Acenolaza
1998, Palaeogeography, Palaeoclimatology, Palaeoecology (138) 221-243
A moderately diverse arthropod icnofauna occurs in ?Permian ephemeral lacustrine deposits of the Paganzo Basin that crop out at Bordo Atravesado, Cuesta de Miranda, western Argentina. Sedimentary successions are interpreted as having accumulated in a playa-lake complex. Deposits include three sedimentary facies: (A) laminated siltstone and mudstone: (B) current-rippled cross-laminated...
The petrogenesis of felsic calc-alkaline magmas from the southernmost Cascades, California: Origin by partial melting of basaltic lower crust
L. E. Borg, M.A. Clynne
1998, Journal of Petrology (39) 1197-1222
The majority of felsic rocks from composite centers in the southernmost Cascades have geochemical and Sr, Nd and Pb isotopic ratios that suggest derivation by partial melting of lower crust that is compositionally similar to calc-alkaline basalts observed in the region. Only a few felsic rocks have δ18O and...
Herbivore effects on plant species density at varying productivity levels
L. Gough, J.B. Grace
1998, Ecology (79) 1586-1594
Artificially increasing primary productivity decreases plant species richness in many habitats; herbivory may affect this outcome, but it has rarely been directly addressed in fertilization studies. This experiment was conducted in two Louisiana coastal marshes to examine the effects of nutrient enrichment and sediment addition on herbaceous plant communities with...
Effects of management practices on grassland birds: Marbled Godwit
Jill A. Dechant, Marriah L. Sondreal, Douglas H. Johnson, Lawrence D. Igl, Christopher M. Goldade, Melvin P. Nenneman, Betty R. Euliss
1998, 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...
Foods of Buller's shearwaters (Puffinus bulleri) associated with driftnet fisheries in the central North Pacific Ocean
P. Gould, P. Ostrom, W. Walker
1998, Notornis (45) 81-93
We examined digestive tract contents and stable nitrogen isotope ratios (??15N) in breast muscles of Buller's shearwaters (Puffinus bulleri) salvaged from squid and largemesh driftnets in the central North Pacific Ocean. The epipelagic Pacific saury (Cololabis saira) was the predominant prey, making up 71% of prey mass in digestive tracts....
Effects of management practices on grassland birds: Baird's Sparrow
Jill A. Dechant, Marriah L. Sondreal, Douglas H. Johnson, Lawrence D. Igl, Christopher M. Goldade, Melvin P. Nenneman, Betty R. Euliss
1998, 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...
Peat characteristics and groundwater geochemistry of calcareous fens in the Minnesota River Basin, U.S.A
J.E. Almendinger, J.H. Leete
1998, Biogeochemistry (43) 17-41
Calcareous fens in Minnesota are spring-seepage peatlands with adistinctive flora of rare calciphilic species. Peat characteristics andgroundwater geochemistry were determined for six calcareous fens in theMinnesota River Basin to better understand the physical structure andchemical processes associated with stands of rare vegetation. Onset of peataccumulation in three of the fens...
Cyclopoid and harpacticoid copepods of the Laurentian Great Lakes
Patrick L. Hudson, Janet W. Reid, Lynn T. Lesko, James H. Selgeby
1998, Ohio Biological Survey Bulletin New Series (12) 50 p.
Historical collections of cyclopoid and harpacticoid copepod crustaceans in the Great Lakes have mainly been based on samples taken with plankton nets in deeper waters (>5 m). Of the non-calanoid copepod species known from the Great Lakes, 58 or 64 live primarily on or in the sediments and rarely...
Human versus lightning ignition of presettlement surface fires in costal pine forests of the upper Great Lakes
Walter L. Loope, John B. Anderton
1998, American Midland Naturalist (140) 206-218
To recover direct evidence of surface fires before European settlement, we sectioned fire-scarred logging-era stumps and trees in 39 small, physically isolated sand patches along the Great Lakes coast of northern Michigan and northern Wisconsin. While much information was lost to postharvest fire and stump deterioration, 147 fire-free intervals revealed...
Real-time monitoring of bluff stability at Woodway, Washington, USA
R.L. Baum, E. L. Harp, W.J. Likos, P. S. Powers, R.G. LaHusen
Evangelista A.Picarelli L.Evangelista A.Picarelli L., editor(s)
1998, Conference Paper, The geotechnics of hard soils - soft rocks. Proceedings of the second international symopsium on hard soils-soft rocks, Naples, October 1998. (Two volumes).
On January 15, 1997, a landslide of approximately 100,000-m3 from a coastal bluff swept five cars of a freight train into Puget Sound at Woodway, Washington, USA, 25 km north of downtown Seattle. The landslide resulted from failure of a sequence of dense sands and hard silts of glacial and...
Depositional facies and sequence stratigraphy of a Lower Carboniferous bryozoan-crinoidal carbonate ramp in the Illinois Basin, mid-continent USA
Z. Lasemi, R. D. Norby, J.D. Treworgy
1998, Geological Society Special Publication (149) 369-395
The Lower Carboniferous Fort Payne and Ullin Formations in the Illinois Basin form the transgressive and highstand systems tracts that were deposited in a carbonate ramp setting. During deposition of the Ullin Limestone, biotic communities dominated by fenestrate bryozoans and echinoderms (primarily crinoids) proliferated, possibly in response...
