Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

Environmental Sciences

Institution
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 18571 - 18600 of 22684

Full-Text Articles in Entire DC Network

Record Of Decision Open Road And Open Motorized Trail Travel Plan, Targhee National Forest, United States Forest Service Jan 1997

Record Of Decision Open Road And Open Motorized Trail Travel Plan, Targhee National Forest, United States Forest Service

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

The purpose and need of this Travel Plan is to offer a balanced range of motorized road and trail related recreation opportunities in the Forest that is consistent with the management prescriptions adopted in the Revised Forest Plan. These prescriptions include standards for the miles of open roads and motorized trails allowed per square mile. This Travel Plan shows which roads and trails will remain open to meet these road and trail density standards.


Record Of Decision Final Environmental Impact Statement (Feis) For The Revised Forest Plan, Targhee National Forest, United States Department Of Agriculture, Forest Service Jan 1997

Record Of Decision Final Environmental Impact Statement (Feis) For The Revised Forest Plan, Targhee National Forest, United States Department Of Agriculture, Forest Service

Record of Decisions (ID)

The Targhee National Forest covers approximately 1.8 million acres (this includes the portion of the Caribou National Forest which is administered by the Targhee). The majority of the forest lies in eastern Idaho and the remainder in western Wyoming. Situated next to Yellowstone and Grand Teton National Parks, the forest lies almost entirely within the Greater Yellowstone Ecosystem.


Final Environmental Impact Statement 1997 Revised Forest Plan Targhee National Forest, United States Department Of Agriculture, Forest Service Jan 1997

Final Environmental Impact Statement 1997 Revised Forest Plan Targhee National Forest, United States Department Of Agriculture, Forest Service

Final Environmental Impact Statements (ID)

This Final Environmental Impact Statement documents the analysis of seven alternatives, which were developed for possible management of the 1.8 million acres administered by the Targhee National Forest in Idaho and Wyoming. Alternatives developed in detail are identified as 1, 2, 3, 3M, 4, 5 and 6. Alternative 3-M is the Forest Service's Selected Alternative. This FEIS has been prepared following public review periods for the DEIS and Proposed Revised Land and Resource Management Plan, during which approximately 12, 000 comments were received from 2,300 individuals or organizations.


Appendix A Response To Public Comments Volume Ii, Targhee National Forest 1997 Revised Forest Plan, United States Department Of Agriculture, Forest Service Jan 1997

Appendix A Response To Public Comments Volume Ii, Targhee National Forest 1997 Revised Forest Plan, United States Department Of Agriculture, Forest Service

Final Environmental Impact Statements (ID)

Includes the Counties of Bonneville, Butte, Clark, Fremont, Jefferson, Lemhi, Madison, and Teton of Idaho and Lincoln and Teton Counties of Wyoming.


Final Environmental Impact Statement For Management Of The High Uintas Wilderness, United States Forest Service Jan 1997

Final Environmental Impact Statement For Management Of The High Uintas Wilderness, United States Forest Service

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

The Final Environmental Impact Statement analyzes four alternatives to amend the Ashley and Wasatch-Cache National Forest Land and Resource Management Plan (Forest Plan) to include Desired Future Condition for mapped Condition Classes with accompanying indicators and standards for the High Uintas Wilderness. The No Action Alternative is analyzed in depth, also. Significant issues considered include effects of human overuse on ecosystem components, the extent visitor experience is impacted by rules and regulations, the extent visitor solitude is impacted by other users, structures and resource impacts, the extent trails meet wilderness objectives, the threat of human and animal waste to water …


Western Australian Fisheries - The Way Forward (1997), Western Australian Fisheries Jan 1997

Western Australian Fisheries - The Way Forward (1997), Western Australian Fisheries

Fisheries Published Reports

Western Australia's fisheries have a bright future.

The State has a pristine marine environment which is enjoyed by both commercial and recreational fishing interests, and the wider community.

There are over 600,000 Western Australians for whom recreational fishing is a favourite pastime and each year they contribute an estimated $500 million to the State's economy. As the popularity of recreational fishing continues to rise so does the sector's importance in overall management of our fisheries.

The commercial industry contributes about $1 billion annually, derived from a wide variety of fish stocks, the major ones being rock lobster, prawns, scallops, abalone …


Future Horizons: Recent Literature In Sustainable Agriculture, Gabriel Hegyes, Charles A. Francis Jan 1997

Future Horizons: Recent Literature In Sustainable Agriculture, Gabriel Hegyes, Charles A. Francis

CARI Extension and Education Materials for Sustainable Agriculture

Here is one building block in the foundation for a future agriculture. Increasing trainer literacy in sustainable agriculture can be defined on several levels. At its most literal, it is an anthology of reviews familiarizing the reader with some of the authors, topics, and titles that have composed the sustainable agriculture literature over the last decade or more. It also serves as an annotated bibliography where the dry abstracts of many such works are replaced with insightful essays. Most importantly, this primer is a language text, exposing the user to the semantics, symbols, and syntax of sustainable agriculture. This collection …


Behavioral Responses Of Bottlenose Dolphins To Remote Biopsy Sampling And Observations Of Surgical Biopsy Wound Healing, David W. Weller, Victor G. Cockcroft, Bernd Würsig, Spencer K. Lynn, Dagmar Fertl Jan 1997

Behavioral Responses Of Bottlenose Dolphins To Remote Biopsy Sampling And Observations Of Surgical Biopsy Wound Healing, David W. Weller, Victor G. Cockcroft, Bernd Würsig, Spencer K. Lynn, Dagmar Fertl

United States Department of Commerce: Staff Publications

Information on reactions of delphinids to biopsy sampling and healing of associated biopsy wounds is limited. Results presented here report on the behavioral responses of free-ranging bottlenose dolphins (Tursiops truncatus) to remote biopsy sampling procedures, and provide information on stages of surgical biopsy wound repair. Biopsy samples of free-ranging dolphins were collected between February–May 1992 in Galveston Bay, Texas, using a sterilized corer-tipped bolt, launched from a crossbow. A total of 8 direct ‘hits’ were documented, 4 hits (50%) in which a tissue sample was obtained, 2 hits (25%) from which no sample was retrieved, and 2 hits …


First Estimates Of Vaquita Abundance, Jay Barlow, Tim Gerrodette, Greg Silber Jan 1997

First Estimates Of Vaquita Abundance, Jay Barlow, Tim Gerrodette, Greg Silber

United States Department of Commerce: Staff Publications

The abundance of the only population of vaquitas, Gulf of California harbor porpoise (Phocoena sinus), is estimated from four surveys conducted in Mexico between 1986 and 1993, using a variety of methods. A line-transect approach was applied, using some parameters estimated from a related species, the harbor porpoise (Phocoena phocoena). Vaquita abundance is estimated as 503 (CV = 0.63) from 1986-1988 boat surveys, 885 (CV = 0.50) from 1988-- 1989 aerial surveys, 572 (CV = 1.43) from a 1991 aerial survey, and 224 (CV = 0.39) from a 1993 ship survey. A weighted log-linear regression in …


Distribution And Abundance Of The Amazon River Dolphin (Inia Geoffrensis) And The Tucuxi (Sotalia Fluviatilis) In The Upper Amazon River, Omar Vidal, Jay Barlow, Luis A. Hurtado, Instituto Tecnológico Y De Estudios Superiores De Monterrey (Itesm), Patricia Cendón, Zully Ojeda Jan 1997

Distribution And Abundance Of The Amazon River Dolphin (Inia Geoffrensis) And The Tucuxi (Sotalia Fluviatilis) In The Upper Amazon River, Omar Vidal, Jay Barlow, Luis A. Hurtado, Instituto Tecnológico Y De Estudios Superiores De Monterrey (Itesm), Patricia Cendón, Zully Ojeda

United States Department of Commerce: Staff Publications

A boat survey was conducted from 5 to 26 June 1993 to estimate the abundance of the Amazon river dolphin (Inia geoffrensis) and the tucuxi (Sotalia fluviatilis) along ca. 120 km of the Amazon River bordering Colombia, Peru, and Brazil. Two survey methods were used: line transects during 5 d and strip transects during 15 d. The line transects were used to estimate the abundance of both species in the main channels of the Amazon at distances greater than 200 m from river banks and islands, and strip transects were used to estimate abundance in the …


Center For Sustainable Agricultural Systems Newsletter, January/February 1997 Jan 1997

Center For Sustainable Agricultural Systems Newsletter, January/February 1997

Center for Sustainable Agricultural Systems: Newsletter (1993–2000)

Contents:

Economic, Environmental and Sociological Effects of Whole-farm Production Systems in Eastern Nebraska: Classifying Producers/Production Systems

SARE Producer Grants Due May 1

RR Soybeans: Delaying the Inevitable?

New Sustainable Agriculture Information Retrieval Service on the Internet

Integrated Farm Update: Windbreaks Increase Pepper Yields

Southern Region Meets to Discuss Sustainable Agriculture Education

Study Associates Nitrate in Drinking Water with Greater Cancer Risk


1997 File Geodatabase Containing Photo Point Locations, Aerial Photos, And Flight Maps, City Of Tampa Department Of Sanitary Sewers Bay Study Group, Pete Reehling, Richard Mckenzie Jan 1997

1997 File Geodatabase Containing Photo Point Locations, Aerial Photos, And Flight Maps, City Of Tampa Department Of Sanitary Sewers Bay Study Group, Pete Reehling, Richard Mckenzie

Data Sets

The Bay Study Group was created by the City of Tampa in 1976 to monitor the effects of pollution abatement that occurred in Hillsborough Bay when the city’s wastewater treatment plant was upgraded from primary to advanced treatment in 1979. The Bay Study Group documented a remarkable restoration of water quality parameters and biological indicators in Hillsborough Bay from the mid 1980s until 2009, when it was disbanded. This zip Geodatabase file contains the photo point locations, aerial photos, and flight maps for the year 1997.


1997 File Geodatabase Containing Aerial Photos, Pete Reehling, Richard Mckenzie, City Of Tampa Department Of Sanitary Sewers Bay Study Group Jan 1997

1997 File Geodatabase Containing Aerial Photos, Pete Reehling, Richard Mckenzie, City Of Tampa Department Of Sanitary Sewers Bay Study Group

Images

The Bay Study Group was created by the City of Tampa in 1976 to monitor the effects of pollution abatement that occurred in Hillsborough Bay when the city’s wastewater treatment plant was upgraded from primary to advanced treatment in 1979. The Bay Study Group documented a remarkable restoration of water quality parameters and biological indicators in Hillsborough Bay from the mid 1980s until 2009, when it was disbanded. This zip Geodatabase file contains the aerial photos for the year 1997.


Back-Calculated Length-At-Age Estimates From Two Scale Radii, Keith L. Hurley, Kevin L. Pope, David W. Willis Jan 1997

Back-Calculated Length-At-Age Estimates From Two Scale Radii, Keith L. Hurley, Kevin L. Pope, David W. Willis

Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications

Variability in length-at-age estimates back-calculated from scales continues to be of concern to fishery scientists. Measurement transects used to back-calculate length at age have been recommended; however, specific scale and annuli radius measurements have not been evaluated for variability between different radii. Thus, the purpose of our study was to compare back-calculated length-at-age estimates determined from two different scale radii: one horizontally from the focus to the anterior-median edge and one diagonally from the focus to the anterior-lateral corner of the scale. No significant differences (P = 0.13 - 0.58 and P = 0.24 - 0.87) in backcalculated length-at-age estimates …


A New Birth-Interval Approach To Estimating Demographic Parameters Of Humpback Whales, Jay Barlow, Phillip Clapham Jan 1997

A New Birth-Interval Approach To Estimating Demographic Parameters Of Humpback Whales, Jay Barlow, Phillip Clapham

United States Department of Commerce: Staff Publications

A demographic model is developed based on interbirth intervals and is applied to estimate the population growth rate of humpback whales (Megaptera novaeangliae) in the Gulf of Maine. Fecundity rates in this model are based on the probabilities of giving birth at time t after a previous birth and on the probabilities of giving birth first at age x. Maximum likelihood methods are used to estimate these probabilities using sighting data collected for individually identified whales. Female survival rates are estimated from these same sighting data using a modified Jolly–Seber method. The youngest age at first parturition is …


Rodent Exclusion Techniques, Gerard Hoddenbach, Jerry Johnson, Carol Disalvo Jan 1997

Rodent Exclusion Techniques, Gerard Hoddenbach, Jerry Johnson, Carol Disalvo

Other Publications in Wildlife Management

Rodents have been a common problem in living and working environments, probably, ever since humans began living in permanent dwellings. Even today many people believe rodent infestations are "inevitable". However, the recent appearance of Hantavirus (Sin Nombre Virus, Hantavirus Pulmonary Syndrome, HPS) in the Western states has re-awakened the public to the serious health problems posed by rodents and has prompted new inquiries into more effective ways to manage infestations. This manual is designed as a training reference for making rodent control in buildings an attainable goal.


Metropolitan Growth And The Local Role In Surface Water Resource Protection In The Lake Erie Basin, Wendy A. Kellogg Jan 1997

Metropolitan Growth And The Local Role In Surface Water Resource Protection In The Lake Erie Basin, Wendy A. Kellogg

All Maxine Goodman Levin School of Urban Affairs Publications

Local governments can play an important role in protecting surface water resources through their compliance with federal and state regulations and through their own land use planning and management practices. Despite 30 years of water quality initiatives in the Lake Erie basin, nonpoint source runoff from urban and urbanizing lands remains a problem. Loss of riparian corridor integrity is increasing as urban areas in the Lake Erie basin experience areal growth. The use and management of land, predominantly a local responsibility, directly affects surface water resources. The role that local governments play in protecting surface water resources was studied in …


Finfish Aquaculture In Western Australia, David Berry Jan 1997

Finfish Aquaculture In Western Australia, David Berry

Journal of the Department of Agriculture, Western Australia, Series 4

David Berry surveys fish farming from Broome to Williams, on off shore reefs and in farm dams, for barramundi, silver perch and black bream, trout and tuna.


Charles Hugh Callison, John A. Drobnicki Jan 1997

Charles Hugh Callison, John A. Drobnicki

Publications and Research

Charles Hugh Callison helped turn the National Audubon Society into a significant wildlife advocacy organization.


Indicator Bacteria Concentrations Of Two Northwest Arkansas Streams In Relation To Flow And Season, Dwayne R. Edwards, Mark S. Coyne, Tommy C. Daniel, P. F. Vendrell, J. F. Murdoch, P. A. Moore Jr. Jan 1997

Indicator Bacteria Concentrations Of Two Northwest Arkansas Streams In Relation To Flow And Season, Dwayne R. Edwards, Mark S. Coyne, Tommy C. Daniel, P. F. Vendrell, J. F. Murdoch, P. A. Moore Jr.

Biosystems and Agricultural Engineering Faculty Publications

Concentrations of indicator bacteria such as fecal coliform (FC) and fecal streptococcus (FS) are often used to assess the suitability of waters for their intended use(s) and to allocate resources for water quality improvement measures. There is evidence, however, that concentrations of FC and FS can be influenced by variables such as season and flow rate during sampling, which could lead to biased results. The objective of this study was to assess the impacts of season and flow rate on concentrations of FC and FS. Fecal indicator bacteria concentrations were measured for approximately three years at five sites on two …


The Treatment Of Vegetable Processing Waste Water Using A Pilot Scale Sequencing Batch Reactor Activated Sludge Process, Peter Hassett Jan 1997

The Treatment Of Vegetable Processing Waste Water Using A Pilot Scale Sequencing Batch Reactor Activated Sludge Process, Peter Hassett

Theses

The SBR process is a discontinuous, unsteady state process and has developed popularity in many countries assisted by reliable control technology for example programmable logic control. A typical SBR installation achieves equalisation, aeration and clarification of batches of wastewater on a timed sequence in one basin. This is in contrast to a volume sequenced process such as the conventional continuous stirred tank reactor where individual treatment objectives are met in separate basins. Advantages include, flexability, minimum energy input, consistent effluent quality and inhibition of filament organism growth by properly controlling substrate concentration and aeration sequences. Nitrification, denitrification and Bio-P removal …


Karl Patterson Schmidt, John A. Drobnicki Jan 1997

Karl Patterson Schmidt, John A. Drobnicki

Publications and Research

Karl Patterson Schmidt turned herpetology firom a hobby into a branch of biology, and influenced numerous young biologists as an editor, teacher, author, and curator.


Fertilization Of An Oligotrophic Lake With A Deep Chlorophyll Maximum: Predicting The Effect On Primary Productivity, H. P. Gross, Wayne A. Wurtsbaugh, Phaedra E. Budy, Chris Luecke Jan 1997

Fertilization Of An Oligotrophic Lake With A Deep Chlorophyll Maximum: Predicting The Effect On Primary Productivity, H. P. Gross, Wayne A. Wurtsbaugh, Phaedra E. Budy, Chris Luecke

Watershed Sciences Faculty Publications

We investigated how epilimnetic fertilization would affect chlorophyll levels and light penetration of oligotrophic sockeye salmon (Oncorhynchus nerka) lakes and how the resulting self-shading would affect primary production of the prominent deep chlorophyll maxima (DCM) of the lakes. Epilimnetic nutrient additions to large mesocosms (330 m3) in Redfish Lake, Idaho, increased levels of primary productivity and chlorophyll a but decreased Secchi depths and light available in the metalimnion and hypolimnion. Redfish Lake and other Sawtooth Valley (Idaho) lakes had DCM in which the mean chlorophyll a peaks were 240-1000% of mean epilimnetic chlorophyll a concentrations. The DCM existed at low …


Hydroacoustic Assessment Of Abundance And Diel Distribution Of Sockeye Salmon And Kokanee In The Sawtooth Valley Lakes, Idaho, D. Beauchamp, Chris Luecke, Wayne A. Wurtsbaugh, H. G. Gross, Phaedra E. Budy, S. Spaulding, R. Dilenger, C. P. Gubala Jan 1997

Hydroacoustic Assessment Of Abundance And Diel Distribution Of Sockeye Salmon And Kokanee In The Sawtooth Valley Lakes, Idaho, D. Beauchamp, Chris Luecke, Wayne A. Wurtsbaugh, H. G. Gross, Phaedra E. Budy, S. Spaulding, R. Dilenger, C. P. Gubala

Watershed Sciences Faculty Publications

We used dual-beam hydroacoustics and echo integration techniques, combined with midwater trawling and gillnetting, to assess the abundance and distribution of the endangered Snake River juvenile sockeye salmon and resident kokanee (both Oncorhynchus nerka) in Sawtooth Valley lakes of Idaho during September 1991 and 1992. Abundance of O. nerka varied among the four lakes containing this species (12,500–257,000) and varied between years in Redfish Lake (86,400 in 1994 and 241,000 in 1992) and Alturas Lake (230,000 in 1991 and 257,000 in 1992). In Alturas Lake, where piscivore densities were high and zooplankton densities were low, small acoustic targets (≤18 cm …


Comparison Of The Aquatic Ecology Of Side-Canyons And The Main Channel Of Lake Powell 1997, Wayne A. Wurtsbaugh, Kirsten L. Gallo Jan 1997

Comparison Of The Aquatic Ecology Of Side-Canyons And The Main Channel Of Lake Powell 1997, Wayne A. Wurtsbaugh, Kirsten L. Gallo

Watershed Sciences Faculty Publications

Physical characteristics of lakes are highly interrelated with biological characteristics. We measured and analyzed the physical characteristics of two side canyons in order to better understand differences in productivity between side canyons and the main channel and to provide general information on the characteristics of the lake.


Vegetative Filter Strip Removal Of Metals In Runoff From Poultry Litter-Amended Fescuegrass Plots, Dwayne R. Edwards, P. A. Moore Jr., Tommy C. Daniel, Puneet Srivastava, D. J. Nichols Jan 1997

Vegetative Filter Strip Removal Of Metals In Runoff From Poultry Litter-Amended Fescuegrass Plots, Dwayne R. Edwards, P. A. Moore Jr., Tommy C. Daniel, Puneet Srivastava, D. J. Nichols

Biosystems and Agricultural Engineering Faculty Publications

Runoff from land areas amended with poultry (Gallus gallus domesticus) manure can contain elevated concentrations of metals such as Cu, Fe, and Zn. Vegetative filter strips (VFS) can reduce runoff concentrations of animal manure components, but reported studies have typically focused on nutrients and solids rather than metals. This experiment assessed the impact of VFS length (0 to 12 m) on concentrations and mass losses of Cu, Fe, K, Na, Ni, and Zn in runoff from fescuegrass (Festuca arundinacea Schreb.) plots (1.5 m wide × 6 and 12 m long) treated with poultry litter. The runoff was produced from simulated …


Radiation And Gas Exchange Of Understory Species At Boreas: Research Annual Performance Report For Period June 15, 1997- June 14, 1998, E. A. Walter-Shea, T. J. Arkebauer Jan 1997

Radiation And Gas Exchange Of Understory Species At Boreas: Research Annual Performance Report For Period June 15, 1997- June 14, 1998, E. A. Walter-Shea, T. J. Arkebauer

School of Natural Resources: Documents and Reviews

No abstract provided.


Effects Of Red Imported Fire Ants On Recruitment Of White-Tailed Deer Fawns, Craig R. Allen, Stephen Demarais, R. Scott Lutz Jan 1997

Effects Of Red Imported Fire Ants On Recruitment Of White-Tailed Deer Fawns, Craig R. Allen, Stephen Demarais, R. Scott Lutz

Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications

We investigated the effect of red imported fire ants (RIFA; Solenopsis invicta) on an index of whitetailed deer (Odocoileus virginianus) fawn recruitment (doe:fawn ratio) on 10 200-ha plots in the Texas Coastal Prairie during 1991-93. Five of the plots received treatments of the fire ant bait AMDRO© (Am. Cyanamid Co., Wayne, N.].) during April and October 1991 and May 1992 to reduce RIFA populations. The remaining 5 plots served as untreated comparison areas. Populations of RIFA were reduced (P < 0.10) on treated study areas during deer fawning periods in 1991-92. Fawn recruitment was higher on treated areas during 1991 (P = 0.037) and 1992 (P = 0.069), with recruitment about twice as high on treated areas. In 1993, after 1 year of RIFA reinfestation, fawn recruitment did not differ between treated and untreated plots (P = 0.443). We conclude that high density RIFA infestations reduced white-tailed deer fawn recruitment.


Effect Of Red Imported Fire Ant Envenomization On Neonatal American Alligators, Craig R. Allen, Kenneth G. Rice, Daniel P. Wojcik, H. Franklin Percival Jan 1997

Effect Of Red Imported Fire Ant Envenomization On Neonatal American Alligators, Craig R. Allen, Kenneth G. Rice, Daniel P. Wojcik, H. Franklin Percival

Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications

Alligator populations in the southeastern United States have substantially recovered since the late 1960s when they were placed on the federal Endangered Species List (Joanen and McNease, 1987). In Florida, both early age class and adult animals currently are harvested for commercial and recreational purposes (Hines and Abercrombie, 1987). In addition, the alligator is ecologically important as a keystone species and as an indicator of wetland health (Mazzotti and Brandt, 1994). Recently, the nonnative ant Solenopsis invicta (the red imported fire ant) has surfaced as a potential threat to alligator populations. Solenopsis invicta is a relatively new (approx. 65 yr) …


Environmental Characteristics Of Black Crappie (Pomoxis Nigromaculatus) Nesting Sites In Two South Dakota Waters, K. L. Pope, D. W. Willis Jan 1997

Environmental Characteristics Of Black Crappie (Pomoxis Nigromaculatus) Nesting Sites In Two South Dakota Waters, K. L. Pope, D. W. Willis

Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications

A biotelemetry study was undertaken during spring 1995 to identify black crappie (Pomoxis nigromaculatus) nesting sites in two South Dakota water bodies. Individually coded ultrasonic transmitters were implanted into the body cavity of 15 adult male black crappie in each water body prior to spawning. Available habitat characteristics were recorded at 75 randomly selected sites within each water body, and habitat characteristics at nesting sites were recorded for each male black crappie believed to be nesting. Of the habitat characteristics analyzed, only substrate firmness did not differ (P=0.79) between water bodies. In Richmond Lake, black crappie selected nesting …