The measurement of mangrove characteristics in southwest Florida using spot multispectral data
John R. Jensen, Hongyue Lin, Xinghe Yang, Elijah Ramsey III, Bruce M. Davis, Chris W. Thoemke
1991, Geocarto International (6) 13-21
An intensive in situ sampling program near Marco Island, Florida during 19–23 October 1988 collected information on mangrove type, maximum canopy height, and percent canopy closure. These data were correlated with selected vegetation index information derived from analysis of SPOT multispectral (XS) data obtained on 21 October 1988. The Normalized...
Seasonal variations of carbon dioxide concentrations in stony, coarse-textured desert soils of southern Nevada, USA
Christina L. Terhune, Jennifer W. Harden
1991, Soil Science (151) 417-429
Knowledge of carbon dioxide concentration in desert soils is required in theoretical models of the development of pedogenic and ground-water calcium carbonate. Most studies have concentrated on medium- to fine-textured soils in temperate to humid environments. Very little data exist for CO2 concentrations in stony, coarse-textured deposits such as those making...
Sampling design for groundwater solute transport: Tests of methods and analysis of Cape Cod tracer test data
Debra S. Knopman, Clifford I. Voss, Stephen P. Garabedian
1991, Water Resources Research (27) 925-949
Tests of a one-dimensional sampling design methodology on measurements of bromide concentration collected during the natural gradient tracer test conducted by the U.S. Geological Survey on Cape Cod, Massachusetts, demonstrate its efficacy for field studies of solute transport in groundwater and the utility of one-dimensional analysis. The methodology was applied...
Magellan: Radar performance and data products
G.H. Pettengill, P.G. Ford, W.T.K. Johnson, R.K. Raney, Laurence A. Soderblom
1991, Science (252) 260-265
The Magellan Venus orbiter carries only one scientific instrument: a 12.6-centimeter wavelength radar system shared among three data-taking modes. The synthetic-aperture mode images radar echoes from the Venus surface at a resolution of between 120 and 300 meters, depending on spacecraft altitude. In the altimetric mode, relative height measurement accuracies...
Population trends from the American woodcock singing-ground survey, 1970-88
John R. Sauer, James B. Bortner
1991, Journal of Wildlife Management (55) 300-312
Population trend analysis of American woodcook (Scolopax minor) using data from a singing-ground survey indicates population declines throughout the breeding range of the species between 1970 and 1988. In the eastern United States and Canada, this decline has been quite consistent throughout the period, but in the central portion of...
Effect of hunting on annual survival of grey ducks in New Zealand
Richard J. Barker, James E. Hines, James D. Nichols
1991, Journal of Wildlife Management (55) 260-265
We used band recovery data from grey ducks (Anas superciliosa) banded in New Zealand between 1957 and 1974 to test 2 null hypotheses: (1) hunting mortality is completely additive to natural sources of mortality, and (2) hunting mortality is completely compensated by changes in natural mortality. We modeled annual survival...
Quasi-static fault growth and shear fracture energy in granite
D.A. Lockner, J.D. Byerlee, V. Kuksenko, A. Ponomarev, A. Sidorin
1991, Nature (350) 39-42
The failure process in a brittle granite sample can be stabilized by controlling axial stress to maintain a constant rate of acoustic emission. As a result, the post-failure stress curve can be followed quasistatically, extending to hours the fault growth process which normally would occur violently in a fraction of...
Slip rate, earthquake recurrence, and seismogenic potential of the Rodgers Creek Fault Zone, northern California: Initial results
Karin E. Budding, David P. Schwartz, David H. Oppenheimer
1991, Geophysical Research Letters (18) 447-450
Instrumental seismicity defines a seismic gap along the Rodgers Creek fault zone (RCFZ) between Santa Rosa and San Pablo Bay. Results of a paleoseismicity study within the gap, using offset channels in late Holocene alluvial deposits as piercing points, indicate a minimum slip rate of 2.1 to 5.8 mm/yr for the past...
Decreased survival of rainbow trout exposed to no. 2 fuel oil caused by sublethal preexposure
B. L. Steadman, W. A. Stubblefield, T. W. Lapoint, H.L. Bergman, M.S. Kaiser
1991, Environmental Toxicology and Chemistry (10) 355-363
Rainbow trout (Oncorhynchus mykiss) were exposed for 21 d to sublethal levels of No. 2 fuel oil (2FO). The four exposure concentrations ranged from 12 to 100 mg/L 2FO dispersed in water and resulted in 0 to 12% mortality. Following this exposure period (preexposure) the ability of preexposed trout to...
Sonobuoy seismic studies at ODP drill sites in Prydz Bay, Antarctica
Guy R. Cochrane, Alan K. Cooper
1991, Conference Paper, Proceedings of the Ocean Drilling Program, Scientific Results
Five sonobuoy seismic-refraction records were collected along the Leg 119 geophysical transect across the Prydz Bay shelf. Velocity-depth profiles are computed from the sonobuoy data and are used to produce a depth section for the principal acoustic unit boundaries observed in the seismic-reflection data along the transect. Traveltime curves generated...
User's guide to the wetland creation/restoration data base, version 2
Lee Miller, Gregor T. Auble, Keith Schneller-McDonald
1991, Book
Wetland creation or restoration projects are frequently proposed as mitigation for unavoidable wetland losses, as components of wetland enhancement programs, and as tools to accomplish specific objectives such as waterfowl production or flood control. There is considerable controversy concerning the effectiveness of such projects as well as the most appropriate...
The neotectonic setting of Puerto Rico
D.G. Masson, Kathryn M. Scanlon
1991, Geological Society of America Bulletin (103) 144-154
The island of Puerto Rico, in the northeast Caribbean, lies within a broad deformation zone between the Caribbean and North American plates. The simplest model for the tectonic setting of Puerto Rico has major strike-slip movement on nearly east-west lines in the vicinity of the Puerto Rico Trench coupled to...
Application and partial validation of a habitat model for moose in the Lake Superior region
A.W. Allen, J.W. Terrell, W.L. Mangus, E. L. Lindquist
1991, Alces (27) 50-64
A modified version of the dormant-season portion of a Habitat Suitability Index (HSI) model developed for assessing moose (Alces alces) habitat in the Lake Superior Region was incorporated in a Geographic Information System (GIS) for 490 km2 of Minnesota's Superior National Forest. Moose locations (n=235) were plotted during aerial surveys...
Directory of assistance centers of the National Water Data Exchange (NAWDEX)
Cassandra D. Blackwell
1991, Open-File Report 91-507
Effects of roadside habitat and fox density on a snow track survey for foxes in Ohio
Thomas R. Stanley, Jonathan Bart
1991, Ohio Journal of Science (91) 186-187
Many methods have been used to survey red fox (Vulpes vulpes) and gray fox (Urocyon dnereoargenteus) populations. However, none has proven entirely satisfactory, and wild foxes remain one of the most difficult economically important wildlife species to monitor. In this study we evaluated the reliability of a snow track survey...
Geohydrology and water quality in northern Portage County, Ohio, in relation to deep-well brine injection
S. M. Eberts
1991, Water-Resources Investigations Report 90-4158
Geohydrology and water quality of the principal freshwater aquifers near oilfield and gasfield brine-injection wells in northern Portage County, Ohio, were evaluated. Since 1975, 13 wells in this part of the Country have been used to dispose of more than 4.5 million barrels of brine by injection into Silurian carbonate...
Accuracy of selected techniques for estimating ice-affected streamflow
John F. Walker
1991, Journal of Hydraulic Engineering (117) 697-712
This paper compares the accuracy of selected techniques for estimating streamflow during ice‐affected periods. The techniques are classified into two categories—subjective and analytical—depending on the degree of judgment required. Discharge measurements have been made at three streamflow‐gauging sites in Iowa during the 1987–88 winter and used to establish a baseline...
Effects of oil pollution on marine bird populations
John F. Piatt, Harry R. Carter, David N. Nettleship
Jan White, editor(s)
1991, Conference Paper, The effects of oil on wildlife: Research, rehabilitation, and general concerns; Proceedings from the oil symposium, Herndon, Virginia, October 16-18, 1990
Worldwide oil pollution has killed millions of marine birds in this century but it has been difficult to directly link these losses to population declines. Estimated bird losses from acute spills and chronic pollution are not precise because we usually do not know the proportion of birds killed at sea...
Vanadium accumulation in carbonaceous rocks: A review of geochemical controls during deposition and diagenesis
G. N. Breit, R. B. Wanty
1991, Chemical Geology (91) 83-97
Published data relevant to the geochemistry of vanadium were used to evaluate processes and conditions that control vanadium accumulation in carbonaceous rocks. Reduction, adsorption, and complexation of dissolved vanadium favor addition of vanadium to sediments rich in organic carbon. Dissolved vanadate (V(V)) species predominate in oxic seawater and are reduced...
Morphological development of the Florida Escarpment: Observations on the generation of time transgressive unconformities in carbonate terrains
C. K. Paull, D.C. Twichell, Fred N. Spiess, Joseph R. Curray
1991, Marine Geology (101) 181-201
An unconformity of 100 m.yr magnitude continues to form on the western edge of the Florida-Bahama Platform, near 26??N, where distal Mississippi Fan sediments are progressively burying the Florida Escarpment. Multiple perspectives of the developing unconformity's morphology are revealed using available technologies including GLORIA images of the entire platform's edge,...
Institutional issues affecting the integration and use of remotely sensed data and geographic information systems
D. T. Lauer, J. E. Estes, J.R. Jensen, D. D. Greenlee
1991, Photogrammetric Engineering and Remote Sensing (57) 647-654
The developers as well as the users of remotely sensed data and geographic information system (GIS) techniques are associated with nearly all types of institutions in government, industry, and academia. Individuals in these various institutions often find the barriers to accepting remote sensing and GIS are not necessarily technical in...
Development of a land-cover characteristics database for the conterminous U.S.
Thomas R. Loveland, J.W. Merchant, D.O. Ohlen, Jesslyn F. Brown
1991, Photogrammetric Engineering and Remote Sensing (57) 1453-1463
Information regarding the characteristics and spatial distribution of the Earth's land cover is critical to global environmental research. A prototype land-cover database for the conterminous United States designed for use in a variety of global modelling, monitoring, mapping, and analytical endeavors has been created. The resultant database contains multiple layers,...
Wasatch fault zone, Utah - segmentation and history of Holocene earthquakes
Michael N. Machette, Stephen F. Personius, Alan R. Nelson, David P. Schwartz, William R. Lund
1991, Journal of Structural Geology (13) 151-164
The Wasatch fault zone (WFZ) forms the eastern boundary of the Basin and Range province and is the longest continuous, active normal fault (343 km) in the United States. It underlies an urban corridor of 1.6 million people (80% of Utah's population) representing the largest earthquake risk in the interior...
Use of lupflour as a replacement for full-fat soy diets for rainbow trout (Oncorhynchus mykiss)
S. G. Hughes
1991, Aquaculture (93) 57-62
A 12-week feeding study was conducted to determine if either whole or dehulled lupin flour could be used as an economical replacement for full-fat soybean meal (FFSM) in a ration for rainbow trout (Oncorhynchus mykiss) and to determine if it was necessary to replace the soybean oil lost when FFSM...
Comparison of three different methods to merge multiresolution and multispectral data: Landsat TM and SPOT panchromatic
P.S. Chavez Jr., S.C. Sides, J.A. Anderson
1991, Photogrammetric Engineering and Remote Sensing (57) 295-303
The merging of multisensor image data is becoming a widely used procedure because of the complementary nature of various data sets. Ideally, the method used to merge data sets with high-spatial and high-spectral resolution should not distort the spectral characteristics of the high-spectral resolution data. This paper compares the results...
