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Articles 31 - 42 of 42
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Asian Carp: Key To Identification
Asian Carp: Key To Identification
National Invasive Species Council
Asian carp are large 39-40 in. (40-50 lb.) fish introduced into the U.S. by fish farmers in Southern states in the 1960’s and 70’s to control vegetation and algae blooms. Three of these species, the grass carp (Ctenopharyngodon idella), bighead carp (Hypophthalmichthys nobilis), and silver carp (Hypophthalmichthys molitrix) have been released or have escaped to the wild and are reproducing in many rivers and streams of the Mississippi River Basin. As they continue to expand their range, and show up in commercial and sport fish catches, a need has arisen to develop a simple …
Final General Management Plan/Environmental Impact Statement (Visitor Management And Resource Protection Plan) Zion National Park, Utah, U.S. Department Of The Interior, National Park Service
Final General Management Plan/Environmental Impact Statement (Visitor Management And Resource Protection Plan) Zion National Park, Utah, U.S. Department Of The Interior, National Park Service
All U.S. Government Documents (Utah Regional Depository)
The purpose of this conceptual plan is to describe the general path the National Park Service intends to follow in managing Zion National Park over the next 20 years. The approved plan will provide a framework for proactive decision making on such issues as visitor use, natural and cultural resource management, and park development, which will allow park managers to effectively address future problems and opportunities. In most cases, new development outside the park would take place to meet visitor needs.
Land Use Patterns In Relation To Lake Water Quality In The Webber Pond Watershed, Problems In Environmental Science Course (Biology 493), Colby College, Colby Environmental Assessment Team, Colby College
Land Use Patterns In Relation To Lake Water Quality In The Webber Pond Watershed, Problems In Environmental Science Course (Biology 493), Colby College, Colby Environmental Assessment Team, Colby College
Colby College Watershed Study: Webber Pond (2002)
The Webber Pond watershed was chosen as our study site. It is a characteristic New England lake located in Vassalboro, Maine. Webber Pond is a popular site for recreation and is home to a wide range of flora and fauna. Like all other lakes in Maine, it is a young lake. However, intensive human activity in the watershed contributes a substantial amount of nutrients and the lake has algal blooms anually in the summer months.
The purpose of this study was to asses the impact of land use and development on the water quality of Webber Pond. Physical and chemical …
Future Antarctic Margin Drilling: Developing A Science Program Plan For Mcmurdo Sound -- Report Of A Workshop Oxford, Uk April 5–7, 2001, David M. Harwood, Laura Lacy, Richard Levy
Future Antarctic Margin Drilling: Developing A Science Program Plan For Mcmurdo Sound -- Report Of A Workshop Oxford, Uk April 5–7, 2001, David M. Harwood, Laura Lacy, Richard Levy
ANDRILL Research and Publications
ANDRILL (ANtarctic DRILLing) is a multinational initiative with the objectives to recover stratigraphic core records for use in interpreting Antarctica’s climatic, glacial and tectonic history over the past 50 million years and at varying scales of age resolution (0.1 to 100 thousand years [k.y.]). A key motivation of ANDRILL is that the role of the Antarctic cryosphere (ice sheets, ice shelves and sea-ice) in the global climate system is complex and poorly known. Understanding the past history of ice volume variation in Antarctica and associated physical changes in this region is critical to proper assessment of the global climate system …
Narrowing Historical Uncertainty: Probabilistic Classification Of Ambiguously Identified Tree Species In Historical Forest Survey Data, David J. Mladenoff, Sally E. Dahir, Eric V. Nordheim, Lisa A. Schulte, Glenn G. Guntenspergen
Narrowing Historical Uncertainty: Probabilistic Classification Of Ambiguously Identified Tree Species In Historical Forest Survey Data, David J. Mladenoff, Sally E. Dahir, Eric V. Nordheim, Lisa A. Schulte, Glenn G. Guntenspergen
Lisa A. Schulte Moore
Historical data have increasingly become appreciated for insight into the past conditions of ecosystems. Uses of such data include assessing the extent of ecosystem change; deriving ecological baselines for management, restoration, and modeling; and assessing the importance of past conditions on the composition and function of current systems. One historical data set of this type is the Public Land Survey (PLS) of the United States General Land Office, which contains data on multiple tree species, sizes, and distances recorded at each survey point, located at half-mile (0.8-km) intervals on a 1-mi (1.6 km) grid. This survey method was begun in …
An Interdatabase Comparison Of Nuclear Decay And Structure Data Utilized In The Calculation Of Dose Coefficients For Radionuclides Produced In A Spallation Neutron Source, John P. Shanahan, K. Eckerman, A. Arndt, C. Gold, Phillip W. Patton, Mark Rudin, R. Brey, T. Gesell, V. Rusetski, S. Pagava
An Interdatabase Comparison Of Nuclear Decay And Structure Data Utilized In The Calculation Of Dose Coefficients For Radionuclides Produced In A Spallation Neutron Source, John P. Shanahan, K. Eckerman, A. Arndt, C. Gold, Phillip W. Patton, Mark Rudin, R. Brey, T. Gesell, V. Rusetski, S. Pagava
Transmutation Sciences Physics (TRP)
Internal and external dose coefficient values have been calculated for 14 anthropogenic radionuclides which are not currently presented in Federal Guidance Reports Nos. 11, 12, and 13 or Publications 68 and 72 of the International Commission on Radiological Protection. Internal dose coefficient values are reported for inhalation and ingestion of 1 μm and 5 μm AMAD particulates along with the f1 values and absorption types for the adult worker. Internal dose coefficient values are also reported for inhalation and ingestion of 1 μm AMAD particulates as well as the f1 values and absorption types for members of the …
Historical And Current Observations On Macroalgae In The Hillsborough Bay Estuary, J.O.R. Johansson
Historical And Current Observations On Macroalgae In The Hillsborough Bay Estuary, J.O.R. Johansson
Reports
To improve the understanding of macroalgae dynamics it was recommended that long-term monitoring of the macroalgae in the bay be initiated. Subsequently, the City of Tampa initiated a Hillsborough Bay macroalgae monitoring program that since 1986 has been providing consistent monthly biomass and species composition information from five fixed transects. In addition to the transect monitoring, low level aerial observations are conducted on a near monthly schedule for estimations of bay-wide macroalgae and seagrass coverage. Results indicate that the annual bay-wide macroalgae coverage has decreased near steadily from about 300ha in the late 1980's to less than 30ha since 1997.
Environmental Assessment : Middle Salt Creek Canyon Access Plan Canyonlands National Park, Utah, National Park Service, U.S. Department Of The Interior, Canyonlands National Park
Environmental Assessment : Middle Salt Creek Canyon Access Plan Canyonlands National Park, Utah, National Park Service, U.S. Department Of The Interior, Canyonlands National Park
Canyonlands Research Bibliography
Salt Creek is the largest drainage in the Needles district of Canyonlands National Park. The creek supports one of the most important riparian ecosystems in the park. It is also the heart of the Salt Creek National Register Archeological District, the area with the highest recorded density of archeological sites in the park. A tributary canyon contains the spectacular Angel Arch, a well-known geologic formation that for many years has been a destination point for park visitors. In 1998 the U.S. District Court for the State of Utah ruled, in a lawsuit filed by the Southern Utah Wilderness Alliance, that …
A Study Of Radon In Air And Water In Maine Schools, Mary Jo Norris
A Study Of Radon In Air And Water In Maine Schools, Mary Jo Norris
Electronic Theses and Dissertations
The transfer coefficient of radon from water to air was investigated in schools. Kitchens, bathrooms and locker rooms were studied for seven schools in Maine. Simulations were done in water-use rooms where radon in air detectors were in place. Quantities measured were radon in water (270-24500 F) and air (0-80 q), volume of water used, emissivities (0.01-0.99) and ventilation rates (0.012-0.066A). Variation throughout the room of the radon concentration was found. Values calculated for the transfer coefficient for kitchens and baths were ranged from 9.6 x to 2.0 x The transfer coefficient was calculated using these parameters and was also …
Land Use Change And Modification Of Near-Surface Thermal Records In The Northern Great Plains, Rezaul Mahmood, Ken Hubbard, Christy Carlson
Land Use Change And Modification Of Near-Surface Thermal Records In The Northern Great Plains, Rezaul Mahmood, Ken Hubbard, Christy Carlson
High Plains Regional Climate Center: Personnel Publications
The North American Great Plains have experienced a rapid overturning of natural grasslands to agricultural land use over the last century. Moreover, in some areas more than 80% of the land use has changed from dry land to irrigated agriculture during the second half of the twentieth century. It is speculated that these changes have modified near-surface atmospheric condition and our modeling study seems to support this. To identify changes in land surface- atmospheric modifications we have applied a soil moistureenergy balance model at three locations in Nebraska: Mead, York, and McCook. The model was applied for three land uses …
Understanding The Role Of Macroalgae In Shallow Estuaries, Maryland Department Of Natural Resources
Understanding The Role Of Macroalgae In Shallow Estuaries, Maryland Department Of Natural Resources
Reports
No abstract provided.
Historical Overview Of Tampa Bay Water Quality And Seagrass Issues And Trends, J.O. R. Johansson
Historical Overview Of Tampa Bay Water Quality And Seagrass Issues And Trends, J.O. R. Johansson
Reports
Historical (pre-1930s) seagrass meadows in Tampa Bay are believed to have covered 31,000 ha of the shallow bay bottom. Later, impacts to the bay from increasing population and industrial development of the Tampa Bay area have resulted in large seagrass losses. By 1982, approximately 8,800 ha of seagrass remained. Since 1982, Tampa Bay seagrass monitoring programs have recorded a reversal in the trend of seagrass loss, with the baywide seagrass cover increasing from 9,420 ha in 1988 to 10,890 ha in 1997. However, between 1997 and 1999 the trend again reversed with substantial losses recorded, specifically in the Old Tampa …