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Diversity and richness of benthic insects in three cold desert spring-streams

Description: The authors examined species diversity and richness in three cold desert spring-streams, and showed that species diversity was similar and species richness was lower than in similar-size streams from other and or semi-arid regions. Species diversity in the spring-streams increased with increasing stream size and substratum diversity, but declined as distance increased from the nearest large source. However, this latter relationship is difficult to quantify because the nearest large source was t… more
Date: May 1, 1993
Creator: Gaines, W. L. & Cushing, C. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Multiple measurement of the coupling between benthic carbon fluxes and bioturbation activity during the ``spring bloom``. Progress report 1992

Description: In accordance with the research plan outlined in our original proposal, we began monitoring indicators of plankton production (Chl-a, cell counts) in surface waters of Long Island Sound from the Port Jefferson / Bridgeport Ferry on Dec. 3, 1992. In contrast to past years no dramatic bloom has occurred to date although a significant pattern of increasing chl-a began during the first week of April. We anticipate that the bloom wig be complete by mid to late April. This has been a particularly col… more
Date: December 31, 1992
Creator: Aller, R. C.; Aller, J. J.; Cochran, J. K. & Lee, C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Population Dynamics of Macrobenthos in a Regulated Stream 1970-71 and 1978

Description: Stability of the macrobenthic community in a regulated section of the Brazos River, Texas, was evaluated. Physicochemical data and information on spatial distribution of macrobenthos were collected. Populations of two invertebrate species, Isonychia sicca and Neoperla clymene, had been greatly reduced since 1970-71 and I. sicca had been practically eliminated from this section of the Brazos. Three other insect populations, Choroterpes mexicanus, Cheumatopsche campyla and Cheumatopsyche lasia, h… more
Date: August 1981
Creator: Coulter, James D. (James Duard)
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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Benthic plant communities in acidic Lake Colden, New York: Sphagnum and the algal mat

Description: Lake Colden, in the central Adirondack Mountains of New York State is botanically similar to acidified lakes in Sweden. Acidification of some Swedish lakes has been associated with an expansion of Sphagnum, primarily in shallow, sheltered littoral areas but also to depths of 18m. During a brief botanical survey on 24-25 July 1979, we observed a dense meadow of Sphagnum pylaesii around much of the shoreline of Lake Colden. Plant community composition was determined by a visual estimate of cover … more
Date: March 1, 1980
Creator: Hendrey, G R & Vertucci, J A
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Estimation of effects from oil on intertidal populations: experimental perturbations versus natural variation

Description: Two experimental approaches to the investigation of effects of oil on intertidal population processes were evaluated in terms of effort required to quantitatively estimate effects of specific magnitudes. One approach used trays of oil-contaminated sediment placed in the low intertidal zone and subsequently treated in laboratory tanks. Three polychaete and two bivalve species were evaluated. It is concluded that quantitative studies would be feasible using the sediment tray approach but that the… more
Date: January 1, 1978
Creator: Vanderhorst, J.R.; Anderson, J.W.; Wilkinson, P. & Woodruff, D.L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Final Report: Risk assessment for produced water discharges to Louisiana open bays

Description: Potential human health and environmental impacts from discharges of produced water to the Gulf of Mexico are of concern to regulators at the State and Federal levels, the public, environmental interest groups and industry. Current and proposed regulations require a zero discharge limit for coastal facilities, based primarily on studies in low energy, poorly flushed environments. However, produced water discharges in coastal Louisiana include a number of open bay sites, where potential human hea… more
Date: March 1, 1996
Creator: Meinhold, A.F.; DePhillips, M.P. & Holtzman, S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Reconnaissance of intertidal and subtidal zones of Back Island, Behm Canal, Southeast Alaska

Description: A diver reconnaissance of the intertidal and subtidal zones of Back Island, Southeast Alaska, was performed May 20-22, 1986. The specific objectives were to catalog potentially vulnerable shellfish, other invertebrates, and plant resources, and to identify potential herring spawning sites. This effort was designed to supplement the existing ecological data base for Back Island that would be used during the National Environmental Policy Act (NEPA) documentation process. A NEPA document will be p… more
Date: September 1, 1986
Creator: Strand, J. A. & Young, J. S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Effects of oil on a tundra pond. Final report

Description: A three year study of two spills in tundra ponds at Barrow showed that oil has a highly specific impact on the benthos. Instead of a toxic effect on the entire community, as occurred with the crustacean zooplankton, certain insect species inhabiting the vegetated margins of the ponds were eliminated. Physical entrapment by the floating oil slick or the film coating stems of emergent sedges and grasses appeared to cause this mortality, and species specific behaviors may be responsible for the ob… more
Date: December 1, 1978
Creator: Hobbie, J.E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Limnological aspects of acid precipitation

Description: Lakes and streams in parts of Norway, Sweden, Canada, and the United States are being severely impacted by acidic precipitation. Scientists meeting at Sagamore, New York, agreed that this is the most serious limnological problem today. The factor responsible for determining the sensitivity of surface waters to acidification is alkalinity derived by weathering of soils and bedrock in the watershed. Acidification, defined as a reduction in alkalinity, can be quantified if preacidification alkalin… more
Date: January 1, 1978
Creator: Hendrey, G.R. (ed.)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Recruitment of benthic animals as a function of petroleum hydrocarbon concentrations in the sediment

Description: Three separate field installations, consisting of clean and oiled sediment in fiberglass trays, were placed in the intertidal zone of Sequim Bay, Washington to determine rates of hydrocarbon depuration and recruitment of benthic organisms. Detailed chemical analysis, using glass capillary gas chromatography, and GC/MS, were conducted such that individual components and hydrocarbon classes associated with the sediment after varying periods of field depuration could be quantitated. Depuration rat… more
Date: January 1, 1977
Creator: Anderson, J. W.; Riley, R. G. & Bean, R. M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Environmental and economic assessment of discharges from Gulf of Mexico Region Oil and Gas Operations. Quarterly technical progress report, 1 October--31 December 1993

Description: Task 2 (Preparation of the Sampling and Analysis Plan) activities involved the incorporation of the offshore site selection process into the Sampling and Analysis Plan. Task 3 (Environmental Field Sampling and Analysis of NORM, Heavy Metals, and Organics) work included making decisions on tissue analyses and performing analyses of water and sediment samples. Task 4 (Monitoring of the Recovery of Impacted Wetland and Open Bay Produced Water Discharge Sites in Coastal Louisiana and Texas) activit… more
Date: January 28, 1994
Creator: Gettleson, D. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Mid-Pacific Research Laboratory. Annual report, 1 October 1980-30 September 1981

Description: The sediments of the Enewetak lagoon are the repository for the majority of residual radionuclides from the weapons testing program. The objective was to evaluate the biological and physical-chemical processes in the sediment bottom communities. Research has focused on features of the environment which reflect biological influence as opposed to direct studies of the constituent organisms. (ACR)
Date: February 1, 1982
Creator: Colin, P.L. & Harrison, J.T. III
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Environmental status of the Lake Michigan region. Volume 6. Zoobenthos of Lake Michigan

Description: This report summarizes Lake Michigan zoobenthic studies up to 1974, including reports of power-plant surveys. It describes ecologies of macroinvertebrate species and some microfauna, partly through use of data from other Great Lakes. The following are discussed: methodology of field surveys; zoobenthic indicators of pollution; zoobenthic effects on sediment-water exchanges; and numbers, biomass, and production of total macroinvertebrates. Prominent features of Lake Michigan zoobenthos include p… more
Date: September 1, 1977
Creator: Mozley, Samuel C. & Howmiller, Richard P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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In situ monitoring of the effects of water quality on benthic detrital decomposition

Description: Detrital decomposition is an important marine benthic process which contributes to the fertility of seas, particularly in estuarian and coastal waters. The process involves a complex community of microorganisms and small animals which interact with each other in a manner similar to that which occurs in forest litter and in composts. Plastic chambers for measuring decomposition rates of Spartina alterniflora were placed on the bottom of the sea at four sites in the northeast: Towd Point, Southam… more
Date: January 1, 1978
Creator: Lee, J. J.; Mastropaolo, C.; McEnery, M.; Tietjen, J.H. & Garrison, J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Ecological evaluation of proposed discharge of dredged material from Oakland Harbor into ocean waters (Phase 2 of -42-foot project)

Description: The US Army Corps of Engineers (USACE), San Francisco District, was authorized by the Water Resources Development Act of 1986 to deepen and widen the navigation channels of Inner and Outer Oakland Harbor, California, to accommodate modern deep-draft vessels. The recommended plan consists of deepening the harbor channels from the presently authorized water depth of {minus}35 ft mean lower low water (MLLW) to {minus}42 ft MLLW and supplying the harbor with adequate turning basins and berthing are… more
Date: September 1, 1990
Creator: Word, J.Q.; Ward, J.A.; Strand, J.A.; Kohn, N.P. & Squires, A.L. (Battelle Marine Research Lab., Sequim, WA (USA))
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Laboratory and field studies on the long-term effects of petroleum hydrocarbons on benthic marine invertebrates

Description: Present and future activities associated with petroleum necessitate research on the potential impacts of oil in the Pacific Northwest marine environment. While the results of recent studies on the fate and effects of petroleum hydrocarbons (PHC) in the marine environment have strengthened our understanding of some aspects of oil pollution, we are not yet to the point at which an accurate prediction of the effects of acute or chronic oil inputs can be made. In order to more clearly define the po… more
Date: March 1, 1977
Creator: Anderson, J W; Riley, R; Bean, R M; Blaylock, J W & Kiesser, S L
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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West Hackberry Strategic Petroleum Reserve site brine-disposal monitoring, year 1 report. Volume 1. Executive summary. Final report

Description: The physical, chemical and biological attributes are described for: (1) a coastal marine environment centered about a Department of Energy Strategic Petroleum Reserve (SPR) brine disposal site located 11.4 km off the southwest coast of Louisiana; and (2) the lower Calcasieu and Sabine estuarine systems that provide leach waters for the SPR project. During the study period, the daily discharge averaged 529,000 barrels of 216 0/00 brine, representing a loading of 18,000 metric tons of salt per da… more
Date: February 1983
Creator: DeRouen, L. R.; Hann, R. W.; Casserly, D. M.; Giammona, C. & Lascara, V. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Transport and Reaction of Heavy Metals in Alaskan Fjord-Estuaries. Annual Report, July 1, 1978-June 30, 1979

Description: Work in progress is summarized. Individual reports are presented on the following research, which has been completed: benthic flux and near bottom reactions of heavy metals in fjords; deep water exchange in Alaskan sub-arctic fjords; sediment-seawater exchanges of nitrogen and transition metals in an Alaskan fjord; deep water renewals in Resurrection Bay, Alaska; the behavior of iron, manganese, and zinc in a heavily polluted river-estuary system. Six cruise reports for 1978 to 1979 are include… more
Date: June 1, 1979
Creator: Burrell, D.C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Offshore oceanographic and environmental monitoring services for the Strategic Petroleum Reserve. Volume I. Appendices. Annual report for the Bryan Mound Site, September 1982-August 1983

Description: The Department of Energy's Strategic Petroleum Reserve Program began leaching the Bryan Mound salt dome and discharging brine into the coastal waters offshore of Freeport, Texas on March 10, 1980. This report describes the findings of a team of Texas A and M University scientists and engineers who have conducted a study to evaluate the effects of the Bryan Mound brine discharge on the marine environment. The study addresses the areas of physical oceanography, analysis of the discharge plum… more
Date: March 1984
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Equity Oil Company BX in situ oil shale project, Piceance Basin, Colorado. Environmental quarter report, March 1-May 31, 1981

Description: This report has been organized into three sections for ease of review. Section A - Air Resources covers data collected by the 100-foot tower between September and December 1980. Section B - Water Resources covers data collected since the last Quarterly Report. Section C - Aquatic Biology covers data collected since January 1981. Laboratory analysis results of all water samples show no significant changes from previous sample have occurred. The alluvial wells did exhibit slightly higher concentr… more
Date: June 12, 1981
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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West Hackberry Brine Disposal Project pre-discharge characterization. Final report

Description: The physical, chemical and biological attributes are described for: (1) a coastal marine environment centered about a Department of Energy Strategic Petroleum Reserve (SPR) brine disposal site 11.4 km off the southwest coast of Louisiana; and (2) the lower Calcasieu and Sabine estuarine systems that provide leach waters for the SPR project. A three month sampling effort, February through April 1981, and previous investigations from the study area are integrated to establish baseline information… more
Date: January 1, 1982
Creator: DeRouen, L. R.; Hann, R. W.; Casserly, D. M. & Giammona, C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Comparative behavior of plutonium and americium in the equatorial Pacific

Description: Inventories of /sup 239 +240/Pu and /sup 241/Am greatly in excess of global fallout levels persist in the benthic environments of Bikini and Enewetak Atolls. The amount of /sup 239 +240/Pu mobilized to solution at the atolls can be predicted from a distribution coefficient K/sub d/ of 2.3 x 10/sup 5/ and the mean sediment concentrations. The mobilized /sup 239 +240/Pu has solute-like characteristics and different valence states coexist in solution - the largest fraction of the soluble plutonium… more
Date: January 1, 1983
Creator: Noshkin, V. E.; Wong, K. M.; Jokela, T. A.; Brunk, J. L. & Eagle, R. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Evaluation of Brine Disposal From the Bryan Mound Site of the Strategic Petroleum Reserve Program. Final Report

Description: On March 10, 1980, the Department of Energy's Strategic Petroleum Reserve Program began leaching the Bryan Mound salt dome and discharging the resulting brine into the coastal waters off Freeport, Texas. During the months of March and April, a team of scientists and engineers from Texas A and M University conducted an intensive environmental study of the area surrounding the diffuser site. A pipeline has been laid from the Bryan Mound site to a location 12.5 statute miles (20 km) offshore. The … more
Date: January 1981
Creator: Case, Robert J.; Chittenden, Mark E., Jr.; Harper, Donald E., Jr.; Kelly, Francis J., Jr.; Loeblich, Laurel A.; McKinney, Larry D. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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