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Articles 6541 - 6570 of 8571

Full-Text Articles in Physical Sciences and Mathematics

Fisheries Research Report No. 125 - A History Of Foreign Fishing Activities And Fishery-Independent Surveys Of The Demersal Finfish Resources In The Kimberley Region Of Western Australia, G Nowara, Stephen J. Newman Mar 2001

Fisheries Research Report No. 125 - A History Of Foreign Fishing Activities And Fishery-Independent Surveys Of The Demersal Finfish Resources In The Kimberley Region Of Western Australia, G Nowara, Stephen J. Newman

Fisheries research reports

The aim of this project was to collate all historical information regarding fishing activities relevant to the Northern Demersal Scalefish Fishery. Three primary sources of information were identified; foreign Taiwanese pair-trawl fishing activities; traditional Indonesian fishing activities; and fishery-independent (CSIRO) survey data.

The Taiwanese pair-trawl fishing catch and effort from 1980 to 1990 was concentrated into two main regions, the Broome area (120°-122°E) and the Holothuria Banks area (124°-126°E) in the north. The majority of trawls were undertaken in the mid-continental shelf region (60-100 m). The total catch of these vessels reached a peak of 4,394 tonnes in 1985. Effort …


Scripting Maine’S Environmentalist Majority: The “Theater Of Oil,” 1968-1975, Christopher S. Beach Mar 2001

Scripting Maine’S Environmentalist Majority: The “Theater Of Oil,” 1968-1975, Christopher S. Beach

Maine History

Christopher Beach argues that Maine's contemporary environmental movement was created in the late 1960s when oil companies seeking sites for new refineries and tanker ports saw the Maine coast as ideally situated for expansion: close to southern New England and the mid-Atlantic coast, but relatively undeveloped and in need of economic re-energizing or so they thought. Hearings and conflict among fishers, state and local officials and politicians, residents (seasonal and permanent) and environmentalists created a long-term debate that in turn spawned a new understanding of Maine as a pastoral landscape for the modern world. Christopher Beach received his J.D. from …


City Of Poquoson Shoreline Situation Report, Marcia Berman, Harry Berquist, Sharon Dewing, J. B. Glover, Carl Hershner, Tamia Rudnicky, Daniel E. Schatt, Kevin Skunda Feb 2001

City Of Poquoson Shoreline Situation Report, Marcia Berman, Harry Berquist, Sharon Dewing, J. B. Glover, Carl Hershner, Tamia Rudnicky, Daniel E. Schatt, Kevin Skunda

Reports

No abstract provided.


Improved Soil Management And Cropping Systems For Waterlog-Prone Soils : Results Of The 1999 Season, Derk Bakker, Greg Hamilton, D Houlbrooke, Cliff Spann Feb 2001

Improved Soil Management And Cropping Systems For Waterlog-Prone Soils : Results Of The 1999 Season, Derk Bakker, Greg Hamilton, D Houlbrooke, Cliff Spann

Resource management technical reports

The project aim was to map the distribution of waterlogging occurrences relative to soil type and climate; to develop soil, water and crop management practices applied to the concept of raised beds to alleviate or prevent waterlogging; to establish the economics of raised bed farming, relative to geographic location and waterlogging frequency.


Browsing Behaviour Of Awassi Ewes On Atriplex Nummularia, Raed Al-Tabini, A. Younger Jan 2001

Browsing Behaviour Of Awassi Ewes On Atriplex Nummularia, Raed Al-Tabini, A. Younger

Raed Al-Tabini

No abstract provided.


2001 Platte River Basin Ecosystem Symposium Proceedings Jan 2001

2001 Platte River Basin Ecosystem Symposium Proceedings

Water Current Newsletter

Over 75 people braved the wintry weather to attend the Eleventh Platte River Basin Ecosystem Symposium that convened in Kearney on 27 February 2001. Icy roads lead to cancellation of only 2 papers. Seventeen papers were presented and 5 posters were on display. Nebraska Public Radio and NTV News covered the event. The presentations were excellent and participants were well satisfied with not only the program but also the food. This year the symposium broadened its charge to include more discussion on community-based environmental protection, sustainable development, and policy-making. The Symposium was sponsored by the University of Nebraska Cooperative Extension …


Taunton River Watershed 2001 Water Quality Assessment Report, Alice M. Rojko, Stella D. Tamul, Laurie E. Kennedy Jan 2001

Taunton River Watershed 2001 Water Quality Assessment Report, Alice M. Rojko, Stella D. Tamul, Laurie E. Kennedy

Reference Documents

No abstract provided.


Fluxnet: A New Tool To Study The Temporal And Spatial Variability Of Ecosystem-Scale Carbon Dioxide, Water Vapor, And Energy Flux Densities, Dennis Baldocchi, Eva Falge, Lianhong Gu, Richard Olson, David Hollinger, Steve Running, Peter Anthoni, Ch. Bernhofer, Kenneth Davis, Robert Evans, Jose Fuente, Allen Goldstein, Gabriel Katul, Beverly Law, Xuhui Lee, Yadvinder Malhi, Tilden Meyers, William Munge, Walt Oechel, K.T. Paw U, Kim Pilegaard, H.P. Schmid, Riccardo Valentini, Shashi Verma, Timo Vesala, Kell Wilson, Steve Wofsy Jan 2001

Fluxnet: A New Tool To Study The Temporal And Spatial Variability Of Ecosystem-Scale Carbon Dioxide, Water Vapor, And Energy Flux Densities, Dennis Baldocchi, Eva Falge, Lianhong Gu, Richard Olson, David Hollinger, Steve Running, Peter Anthoni, Ch. Bernhofer, Kenneth Davis, Robert Evans, Jose Fuente, Allen Goldstein, Gabriel Katul, Beverly Law, Xuhui Lee, Yadvinder Malhi, Tilden Meyers, William Munge, Walt Oechel, K.T. Paw U, Kim Pilegaard, H.P. Schmid, Riccardo Valentini, Shashi Verma, Timo Vesala, Kell Wilson, Steve Wofsy

School of Natural Resources: Faculty Publications

FLUXNET is a global network of micrometeorological flux measurement sites that measure the exchanges of carbon dioxide, water vapor, and energy between the biosphere and atmosphere. At present over 140 sites are operating on a long-term and continuous basis. Vegetation under study includes temperate conifer and broadleaved (deciduous and evergreen) forests, tropical and boreal forests, crops, grasslands, chaparral, wetlands, and tundra. Sites exist on five continents and their latitudinal distribution ranges from 70°N to 30°S.

FLUXNET has several primary functions. First, it provides infrastructure for compiling, archiving, and distributing carbon, water, and energy flux measurement, and meteorological, plant, and soil …


Test Of An Extended Mathematical Approach To Calculate Maize Leaf Area Index And Leaf Angle Distribution, Elizabeth A. Walter-Shea, Mark A. Mesarch Jan 2001

Test Of An Extended Mathematical Approach To Calculate Maize Leaf Area Index And Leaf Angle Distribution, Elizabeth A. Walter-Shea, Mark A. Mesarch

School of Natural Resources: Faculty Publications

No abstract provided.


Evaluation Of An Algorithm For Predicting Albedo In Heliotropic Crops, Elizabeth A. Walter-Shea, A. Weiss Jan 2001

Evaluation Of An Algorithm For Predicting Albedo In Heliotropic Crops, Elizabeth A. Walter-Shea, A. Weiss

School of Natural Resources: Faculty Publications

No abstract provided.


Value Of Incorporating Satellite-Derived Land Cover Data In Mm5/Place For Simulating Surface Temperatures, Todd M. Crawford, David J. Stensrud, Franz Mora, James W. Merchant, Peter J. Wetzel Jan 2001

Value Of Incorporating Satellite-Derived Land Cover Data In Mm5/Place For Simulating Surface Temperatures, Todd M. Crawford, David J. Stensrud, Franz Mora, James W. Merchant, Peter J. Wetzel

School of Natural Resources: Faculty Publications

The Parameterization for Land–Atmosphere–Cloud Exchange (PLACE) module is used within the Fifth- Generation Pennsylvania State University–National Center for Atmospheric Research Mesoscale Model (MM5) to determine the importance of individual land surface parameters in simulating surface temperatures. Sensitivity tests indicate that soil moisture and the coverage and thickness of green vegetation [as manifested by the values of fractional green vegetation coverage (fVEG) and leaf area index (LAI)] have a large effect on the magnitudes of surface sensible heat fluxes. The combined influence of LAI and fVEG is larger than the influence of soil moisture on the partitioning of the surface energy …


Some Perspectives On Recent In Situ Air Temperature Observations: Modeling The Microclimate Inside The Radiation Shields*, X. Lin, Kenneth Hubbard, Elizabeth A. Walter-Shea, James Brandle, G.E. Meyer Jan 2001

Some Perspectives On Recent In Situ Air Temperature Observations: Modeling The Microclimate Inside The Radiation Shields*, X. Lin, Kenneth Hubbard, Elizabeth A. Walter-Shea, James Brandle, G.E. Meyer

School of Natural Resources: Faculty Publications

Air temperature measurement has inherent biases associated with the particular radiation shield and sensor deployed. The replacement of the Cotton Region Shelter (CRS) with the Maximum–Minimum Temperature System (MMTS) and the introduction of Automated Surface Observing System (ASOS) air temperature observing systems during the NWS modernization introduced bias shifts in federal networks that required quantification. In rapidly developing nonfederal networks, the Gill shield temperature systems are widely used. All of these systems house an air temperature sensor in a radiation shield to prevent radiation loading on the sensors; a side effect is that the air temperature entering a shield is …


Impacts Of Predation On Northern Bobwhite And Scaled Quail, Dale Rollins, John P. Carroll Jan 2001

Impacts Of Predation On Northern Bobwhite And Scaled Quail, Dale Rollins, John P. Carroll

School of Natural Resources: Faculty Publications

Northern bobwhite (Colinus virginianus) and scaled quail (Callipepla squamata) populations have declined throughout most of their distribution, and these declines have become more dramatic in recent years. In this review, we examine the role of predation in quail management. Predation is the major source of nest loss and of mortality for young and adult quail. Mean nest success across studies reviewed was 28%. Estimates of annual survival rates have varied from 5 to 26% for radiotelemetry studies and from 15 to 30% based on age-ratio studies. Breeding season survival estimates ranged from 13 to 51% in telemetry …


Bollgard Cotton: An Assessment Of Global Economic, Environmental, And Social Benefits, Julie M. Edge, John H. Benedict, John P. Carroll, H. Keith Reding Jan 2001

Bollgard Cotton: An Assessment Of Global Economic, Environmental, And Social Benefits, Julie M. Edge, John H. Benedict, John P. Carroll, H. Keith Reding

School of Natural Resources: Faculty Publications

Insect-protected crops like Bollgard (Monsanto Company, St. Louis) Bacillus thuringiensis (Bt) cotton are bringing cotton growers new alternatives to broad-spectrum insecticide use in integrated pest management. After five years (1996-2000) of commercial use, a number of benefits of Bt cotton technology to growers, the environment, and society at large have been reported; however, the benefits of the technology have not been examined to date from a holistic point of view. Accordingly, the objectives of this paper were to examine the potential economic, environmental, and social benefits of Bt cotton compared with broad-spectrum insecticide use, as reported in current literature, …


The Atlantic Sea Scallop Fishery In The U.S.And Canada: A Natural Experiment In Fisheries Management Regimes, Robert Repetto Jan 2001

The Atlantic Sea Scallop Fishery In The U.S.And Canada: A Natural Experiment In Fisheries Management Regimes, Robert Repetto

Yale School of the Environment Publications Series

The Atlantic sea scallop fisheries in the U.S. and Canadian offshore waters provide a natural experiment in fisheries management regimes. Starting in 1986, in side by side areas of George’s Bank, Canada adopted a rights-based approach while the U.S. continued with effort controls. Analysis of their experiences shows that the resource has been better maintained in Canada with lower fishing effort, that the Canadian fishing industry has become more prosperous and innovative relative to that in the U.S., and that the Canadian co-management regime is more cooperative. These results suggest that systematic evaluation of actual experience with rights-based fishery management …


Phylogeographic Analysis Of The Threatened And Endangered Superconglutinate-Producing Mussels Of The Genus Lampsilis (Bivalvia: Unionidae), Kevin J. Roe, Charles Lydeard, Paul D. Hartfield Jan 2001

Phylogeographic Analysis Of The Threatened And Endangered Superconglutinate-Producing Mussels Of The Genus Lampsilis (Bivalvia: Unionidae), Kevin J. Roe, Charles Lydeard, Paul D. Hartfield

Kevin J. Roe

Several species of freshwater unionid mussels in the genus Lampsilis exhibit a remarkable reproductive strategy. Female mussels of these species enclose their larvae in a minnow-like lure, called a ‘superconglutinate’, to attract piscivorous fishes. When a fish attempts to ingest the superconglutinate the lure ruptures and the larvae are released to parasitize the fish. Of the four species of mussel which exhibit this strategy and are endemic to the Gulf Coast drainages of the southeastern United States, three are protected under the Endangered Species Act, and one is recognized as imperilled. Phylogenetic analysis of nucleotide sequences of the mitochondrial 16S …


Water Resources Year In Review - Winter 2001, Annis Water Resource Institute Jan 2001

Water Resources Year In Review - Winter 2001, Annis Water Resource Institute

AWRI Reviews

No abstract provided.


King William County Shoreline Situation Report, Marcia Berman, Harry Berquist, Sharon Dewing, J. B. Glover, Carl Hershner, Tamia Rudnicky, Daniel E. Schatt, Kevin Skunda Jan 2001

King William County Shoreline Situation Report, Marcia Berman, Harry Berquist, Sharon Dewing, J. B. Glover, Carl Hershner, Tamia Rudnicky, Daniel E. Schatt, Kevin Skunda

Reports

The data inventory developed for the Shoreline Situation Reports are based on a three-tiered shoreline assessment approach. This assessment characterizes conditions in the shorezone observed from a small boat moving along the shoreline. Handheld GPS units record data observations in the field. The three tiered shoreline assessment approach divides the shorezone into three regions:

  1. the immediate riparian zone, evaluated for land use

  2. the bank, evaluated for height, stability and natural protection

  3. the shoreline, describing the presence of shoreline structures for shore protection and recreational purposes.

Three GIS coverages are generated from the collection technique. The KW_lubc coverage are features related …


Groundwater Study Of The Bencubbin Townsite, Cahit Yesertener, P Lacey, Shawan Dogramaci, F Lewis, Department Of Agriculture, Western Australia. Rural Towns Program, Ali S. Mahtab, S Sharafi Jan 2001

Groundwater Study Of The Bencubbin Townsite, Cahit Yesertener, P Lacey, Shawan Dogramaci, F Lewis, Department Of Agriculture, Western Australia. Rural Towns Program, Ali S. Mahtab, S Sharafi

Resource management technical reports

A groundwater study of the townsite of Bencubbin. It aimed to accelerate the implementation of effective salinity management options. The study consisted of drilling investation and installation of a piezometer network, groundwater flow modelling and a flood risk analysis.


Blackwood Catchment : Katanning Zone (Zone 6) : Catchment Appraisal 2001, Henry Brockman, Blackwood Rapid Catchment Appraisal Team (Wa) Jan 2001

Blackwood Catchment : Katanning Zone (Zone 6) : Catchment Appraisal 2001, Henry Brockman, Blackwood Rapid Catchment Appraisal Team (Wa)

Resource management technical reports

The aim of this report is to document the extent of salinity and land degradation within the Katanning zone, Western Australia, and management options aimed at reducing recharge and land degradation.


Final General Management Plan/Environmental Impact Statement. (Visitor Management And Resource Protection Plan) Zion National Park., U.S. National Park Service Jan 2001

Final General Management Plan/Environmental Impact Statement. (Visitor Management And Resource Protection Plan) Zion National Park., U.S. National Park Service

All U.S. Government Documents (Utah Regional Depository)

This document describes the path the National Park Service intends to follow in managing Zion National Park over the next 20 years, providing a framework for proactive decision-making on such issues as visitor use, natural and cultural resource management and park development.


Gis Data: King William County Shoreline Situation Report, Marcia Berman, Harry Berquist, Sharon Dewing, J. B. Glover, Carl Hershner, Tamia Rudnicky, Daniel E. Schatt, Kevin Skunda Jan 2001

Gis Data: King William County Shoreline Situation Report, Marcia Berman, Harry Berquist, Sharon Dewing, J. B. Glover, Carl Hershner, Tamia Rudnicky, Daniel E. Schatt, Kevin Skunda

Data

The data inventory developed for the Shoreline Situation Reports are based on a three-tiered shoreline assessment approach. This assessment characterizes conditions in the shorezone observed from a small boat moving along the shoreline. Handheld GPS units record data observations in the field. The three tiered shoreline assessment approach divides the shorezone into three regions:

  1. the immediate riparian zone, evaluated for land use

  2. the bank, evaluated for height, stability and natural protection

  3. the shoreline, describing the presence of shoreline structures for shore protection and recreational purposes.

Three GIS coverages are generated from the collection technique. The KW_lubc coverage are features related …


Before And After Riparian Management: Sediment And Nutrient Exports From A Small Agricultural Catchment, Western Australia, Lucy Mckergow, David Weaver, I Prosser, R Grayson, A. E.G. Reed Jan 2001

Before And After Riparian Management: Sediment And Nutrient Exports From A Small Agricultural Catchment, Western Australia, Lucy Mckergow, David Weaver, I Prosser, R Grayson, A. E.G. Reed

Conference papers and presentations

Riparian vegetation can trap sediment and nutrients coming from hillslopes and reduce stream bank erosion. This study presents results from a 10 year stream monitoring program in a small agricultural catchment near Albany, Western Australia. In 1996, a 1.6 km stream reach was fenced, planted with eucalyptus species and managed separately from the adjacent paddocks. Stream flow, nutrient and sediment concentration data were collected at the downstream end of the fenced riparian area between 1991 and 2000, so there are data for the “before” and “after” riparian management periods. Suspended sediment concentrations fell dramatically following riparian management; the average event …


Hydrogeological Study Of The Dongolocking Reserves, Dumbleyung, Western Australia, Ben Whitfield Jan 2001

Hydrogeological Study Of The Dongolocking Reserves, Dumbleyung, Western Australia, Ben Whitfield

Resource management technical reports

The aims of the hydrogeological study were to assess the characteristics of aquifers within the weathered zone, throughout the Dongolocking Reserves and in the surrounding farmland; provide baseline data on root zone salt store (EM38) and vertical distribution of stored salts (EM38) through the use of ground-based geophysical techniques; identify remnant bush at risk of salinisation; suggest management options to address any observed salinity problems; provide a groundwater monitoring network.


Relationships Between Stream Order And Management Priority: A Water Quality Case Study, David Weaver, Adrian Reed, John Grant Jan 2001

Relationships Between Stream Order And Management Priority: A Water Quality Case Study, David Weaver, Adrian Reed, John Grant

Conference papers and presentations

Seagrass, which once dominated the habitat of Oyster Harbour on the south coast of Western Australia has been replaced by macroalgae because of increased nutrient and sediment discharge from the rural dominated catchment. Total Phosphorus (TP), Total Nitrogen (TN), Suspended Sediment (SS) and Electrical Conductivity (EC) concentrations from a catchment – wide (168 sites), event-driven snapshot, water quality monitoring program conducted from 1994 to 1996, were analysed in relation to stream order and published survey data on riparian zone condition. This analysis was performed to examine relationships between stream order, riparian zone condition and water quality, and implications for the …


Estimating Abundance Of Galliformes: Tools And Application, Michael J. Conroy, John P. Carroll Jan 2001

Estimating Abundance Of Galliformes: Tools And Application, Michael J. Conroy, John P. Carroll

School of Natural Resources: Faculty Publications

A large number of techniques are available for assessing populations of vertebrates. However, application of many of those techniques to Galliformes is hampered by a variety of constraints. These problems are often magnified by poor understanding of the biology of many species of concern, and an absence of valid estimates of abundance and demographic parameters. Researchers interested in developing estimates of Galliformes populations must address a number of key issues before collecting field data, to avoid biases in the resulting population estimates. General guidance exists for the identification of appropriate population estimation techniques, and a dichotomous key has been developed …


Book Review Of Eco-Pragmatism: Making Sensible Environmental Decisions In An Uncertain World, Lynda L. Butler Jan 2001

Book Review Of Eco-Pragmatism: Making Sensible Environmental Decisions In An Uncertain World, Lynda L. Butler

Faculty Publications

No abstract provided.


Resource Law Notes Newsletter, No. 51, Winter/Spring Issue, Mar. 2001, University Of Colorado Boulder. Natural Resources Law Center Jan 2001

Resource Law Notes Newsletter, No. 51, Winter/Spring Issue, Mar. 2001, University Of Colorado Boulder. Natural Resources Law Center

Resource Law Notes: The Newsletter of the Natural Resources Law Center (1984-2002)

No abstract provided.


Groundwater Study Of The Quairading Townsite, T Cattlin Jan 2001

Groundwater Study Of The Quairading Townsite, T Cattlin

Resource management technical reports

A hydrogeological investigation and a flood risk analysis were carried out for the town of Quairading with the aim of accelerating the implementation of effective salinity management options.


Groundwater Study Of The Pingrup Townsite, D Pollock, Department Of Agriculture, Western Australia, Louise Hopgood, F Lewis, Ali S. Mahtab, Anthony D. Barr, Muhammad J. Siddiqi, Ron Colman Jan 2001

Groundwater Study Of The Pingrup Townsite, D Pollock, Department Of Agriculture, Western Australia, Louise Hopgood, F Lewis, Ali S. Mahtab, Anthony D. Barr, Muhammad J. Siddiqi, Ron Colman

Resource management technical reports

A groundwater study was carried out in the townsite of Pingrup. It aimed to accelerate the implementation of effective salinity risk management. The study consisted of a drilling investigation and expansion of a piezometer network, a pumping test, groundwater flow modelling and a flood risk analysis.