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Radionuclides in plankton from the South Pacific Basin

Description: We have initiated an investigation of the utility of marine plankton as bioconcentrating samplers of low-level marine radioactivity in the southern hemisphere. A literature review has shown that both freshwater and marine plankton have trace element and radionuclide concentration factors (relative to water) of up to 10/sup 4/. We participated in Operations Deepfreeze 1981 and 1982, collecting a total of 48 plankton samples from the USCGC Glacier on its Antarctic cruises. Battelle Pacific Northw… more
Date: March 23, 1984
Creator: Marsh, K.V. & Buddemeier, R.W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effects of energy related activities on the plankton of the Chesapeake Bay. Section 1. Progress report, 1 August 1976--30 September 1977

Description: Progress is reported on a comprehensive study of the ecology of the Chesapeake Bay estuary system. Emphasis is placed on seasonal variations of initial energy fixation by phytoplankton primary producers and subsequent energy transfer to herbivours and becterial heterotrophs. The impact of chemical and radioactive effluents from electric power plants on the ecology of Chesapeake Bay will be assessed. Data are included on the role of plankton metabolism in regenerating nutrients, nutrient exchang… more
Date: 1977~
Creator: Taft, Jay L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Water chemistry and phytoplankton field and laboratory procedures

Description: The purpose of this manual is to serve as a guide for persons using these techniques in water quality studies and as a written record of the methods used in this laboratory at this time. It is anticipated that the manual will be updated frequently as new methods are added and the present ones are further refined. The present methods are all used routinely and have been in regular use for a year or longer. This manual is specifically written as a guide for the collection and analysis of lake wat… more
Date: December 1, 1979
Creator: Davis, C.O. & Simmons, M.S. (eds.)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Composition of phytoplankton communities and their contribution to secondary productivity in Carolina Bays on the Savannah River Plant

Description: The overall goal of the this three year project is to determine the importance of phytoplankton (microscopic algae) as a component of the food chain base in SRS cardine bays. To summarize specific year three results: Total phytoplankton abundance in Flamingo bay was greatest during early spring 1989, declined during spring and summer, but increased again during early fall. Most of this phytoplankton density was composed of genus Chlamydomonas sp. Ellenton bay demonstrated a similar decline in p… more
Date: August 1, 1991
Creator: Williams, J.B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Simulation of the carbon cycle in the ocean

Description: A dual carbon-nitrogen biological model of the upper ocean has been developed, which has successfully allowed predictions of fluxes of carbon between atmosphere and the deep ocean to made. Regarding studying the carbon cycle in the ocean, the modelling has highlighted the need for a good understanding of the interactions between the carbon and nitrogen cycles, and also the importance of zooplankton grazing and levels of overwintering biological stocks. Problems have been encountered with the ac… more
Date: September 16, 1991
Creator: Fasham, M.J.R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Investigation on the occurrence and significance of cyclic adenosine 3':5'-monophosphate in phytoplankton and natural aquatic communities

Description: This study is an investigation into the occurrence and potential functions of cyclic adenosine 3':5'-monophosphate (cAMP), a potent and ubiquitous metabolic regulatory molecule in heterotrophic organisms, in phytoplankton and in natural aquatic communities. Laboratory-cultured phytoplankton were grown under both optimal and suboptimal nutrient regimes under constant temperature and illumination regimes. Cellular and extracellular cAMP production, characterized by a number of biochemical techniq… more
Date: January 1, 1980
Creator: Francko, D.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Impingement and entrainment of fishes at the Savannah River Plant: an NPDES 316b demonstration

Description: Environmental impacts of the Savannah River Plant's withdrawal of Savannah River water include impingement of juvenile and adult fish on trash removal screens, and entrainment of planktonic fish eggs and larval fish into the pumping system. The Savannah River Plant (SRP) has the capacity to pump 3.6 million cubic meters of water per day--25% of the minimal river discharge--for cooling and other purposes. Present removal is 7% of the actual river discharge. In the river and intake canals reside … more
Date: February 1, 1978
Creator: McFarlane, R. W.; Frietsche, R. F. & Miracle, R. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Dissolved organic matter and lake metabolism. Technical progress report, 1 July 1979-30 June 1980

Description: Progress in research to evaluate the impact of utilization of fossil fuels on surface water is reported. Analyses of regulatory mechanisms of growth and rates of carbon cycling center on evaluation of quantitative control interactions among the microflora of the pelagial zones of several lakes of progressively greater eutrophy, littoral photosynthetic producer-decomposer complex, and allochthonous inorganic-organic influxes and their biotic processing. The underlying thesis is that quantificati… more
Date: January 1, 1980
Creator: Wetzel, R.G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

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
open access

Study of the macrozooplankton within the samples taken at the Mobile site from November 1977 through November 1978. A data report of the Lawrence Berkeley Laboratory

Description: This report brings together the results of a re-examination of zooplankton samples from the Mobile OTEC site (29/sup 0/N-88/sup 0/W) in the northern Gulf of Mexico for macrozooplankton larger than 15 mm.
Date: November 1, 1981
Creator: Steen, J. & Gunter, G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Short term variation in the vertical distribution of copepods off the coast of northern Peru

Description: Vertical profiles of chlorophyll a, oxygen, density and copepods were collected during November 1977 near 9/sup 0/S off Peru. The majority of three groups of copepod, the Oncaeidae, the Oithonidae and small calanoids, remained above the depth (approx. 30m) where concentrations of oxygen became less than 0.5 ml.l/sup -1/ both day and night. Centers of population of all three groups were in or below the pycnocline at all times. In daytime all three groups accumulated at depth, while at night all … more
Date: April 1, 1980
Creator: Smith, S. L.; Boyd, C. M. & Lane, P. V. Z.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Distribution and abundance of submerged aquatic macrophytes in a reactor cooling reservoir

Description: Measurements of ash-free dry weight were used to characterize the effects of a heated effluent on submerged macrophytes in a reactor cooling reservoir. The species which were most abundant during the summers of 1974 and 1975 were Myriophyllum spicatum L. and Eleocharis acicularis (L.) R. and S. Examination of the vertical distribution of the shoot biomass of Myriophyllum revealed that plants in heated areas grew closer to the water surface than plants in unheated areas. The biomass of the secon… more
Date: August 1, 1977
Creator: Grace, J.B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Improved collecting apparatus

Description: An improved collecting apparatus for small aquatic or airborne organisms such as plankton, larval fish, insects, etc. The improvement constitutes an apertured removal container within which is retained a collecting bag, and which is secured at the apex of a conical collecting net. Such collectors are towed behind a vessel or vehicle with the open end of the conical net facing forward for trapping the aquatic or airborne organisms within the collecting bag, while allowing the water or air to pas… more
Date: March 5, 1981
Creator: Duncan, C.P.
Item Type: Refine your search to only Text
Partner: UNT Libraries Government Documents Department
open access

Pigment-protein complexes

Description: The photosynthetically-active pigment protein complexes of procaryotes and eucaryotes include chlorophyll proteins, carotenochlorophyll proteins, and biliproteins. They are either integral components or attached to photosynthetic membranes. Detergents are frequently required to solubilize the pigment-protein complexes. The membrane localization and detergent solubilization strongly suggest that the pigment-protein complexes are bound to the membranes by hydrophobic interactions. Hydrophobic int… more
Date: January 1, 1980
Creator: Siegelman, H W
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Ceriodaphnia survival/reproduction test

Description: This toxicity test was conducted to determine if the effluent causes death (acute toxicity) or reduction in the reproduction of the test organisms (chronic toxicity) during a seven day period. A series of dilutions of the effluent are set to determine how much the effluent must be diluted before toxic effects are not longer noted. Acute toxicity is checked by statistically analyzing whether significantly more organisms die in the effluent dilutions than in the control treatment. Chronic toxicit… more
Date: January 1, 1989
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Investigation on the occurrence and significance of cyclic adenosine 3':5'-monophosphate in phytoplankton and natural aquatic communities

Description: This study demonstrates, on the basis of several analyanalytical criteria, that the production and extracellular release of cyclic adenosine 3':5'-monophosphate (cAMP) is widespread among phytoplankton species. The production and release of CAMP varied markedly among different species grown under similar environmental conditions, and intraspecifically during the life cycle of a given algal species. This investigation marks the first time cAMP has been investigated in natural aquatic systems. An… more
Date: January 1, 1980
Creator: Francko, D.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Phytoplankton distribution in three thermally different but edaphically similar reactor cooling reservoirs

Description: Phytoplankton community structure and the physicochemical characteristics of three reactor cooling reservoirs in close proximity and of similar age and bottom type were studied during 1978. The three reservoirs differed in thermal alteration resulting from reactor cooling water as follows: (1) considerable heating with lake-wide temperatures >30/sup 0/C, even in winter; (2) a maximal 5/sup 0/C increase occurring in only one of three major arms of the reservoir; and (3) no thermal effluent re… more
Date: January 1, 1982
Creator: Wilde, E W
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Phytoplankton and physical-chemical conditions in selected rivers and the coastal zone of Lake Michigan, 1972

Description: A very large data set was obtained on the nearshore environment of Lake Michigan during 1972. The data set is probably unique in that samples were collected and analyzed for a number of physical-chemical parameters and for phytoplankton standing crop and species composition. Phytoplankton identified during the study totaled 431 taxa of which 306 were diatoms, which serves to illustrate the magnitude of available data. Results are presented for eleven different transects sampled in April and for… more
Date: January 1, 1980
Creator: Schelske, C.L.; Feldt, L.E. & Simmons, M.S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effects of environmental stress on the community structure and productivity of salt marsh epiphytic communities. Progress report, September 1, 1976--August 31, 1977

Description: Theoretical studies deal with trophic relationships between the small organisms at the base of detrital and planktonic food webs. These organisms are not casual mixtures of primary producers, decomposers, and small herbivores. No matter how transient and spatially disparate communities of small organisms seem to the uninformed, only certain combinations of organisms can function as meaningful communities. The strength of food web bonds is the result of the qualitative and quantitative molecular… more
Date: January 1, 1977
Creator: Lee, J. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Effects of acidity on primary productivity in lakes: phytoplankton. [Lakes Panther, Sagamore, and Woods]

Description: Relationships between phytoplankton communities and lake acidity are being studied at Woods Lake (pH ca. 4.9), Sagamore Lake (pH ca. 5.5), and Panther Lake (pH ca. 7.0). Numbers of phytoplankton species observed as of July 31, 1979 are Woods 27, Sagamore 38, and Panther 64, conforming to other observations that species numbers decrease with increasing acidity. Patterns of increasing biomass and productivity found in Woods Lake may be atypical of similar oligotrophic lakes in that they develop r… more
Date: January 1, 1979
Creator: Hendrey, G R
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Consequences of natural upwelling in oligotrophic marine ecosystems

Description: One of the major environmental consequences of Ocean Thermal Energy Conversion (OTEC) plans may be the artificial upwelling of nutrients to the surface waters of oligotrophic ecosystems. Within a 10 km/sup 2/ area, OTEC plants of 1000 MWe total capacity could upwell the same amount of nutrients as occurs naturally off Peru each day. The biological response to possible eutrophication by OTEC plants may not be similar to that within coastal upwelling ecosystems, however. Upwelling in offshore oce… more
Date: March 1, 1980
Creator: Walsh, J J
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Multidisciplinary benefits from biomonitoring studies of cooling reservoirs

Description: Therefore, biomonitoring studies of once-through cooling reservoirs for nuclear reactors not only provide field and laboratory information for environmental compliance, but also offer results which benefit lake and reservoir management constructs and limnetic community ecology. Biomonitoring programs have been performed at the Department of Energy's Savannah River Site to provide information fro compliance with Section 316a of the Clean Water Act. On Par Pond and Pond B comprehensive field effo… more
Date: January 1, 1990
Creator: Bowers, J.A. & Gladden, J. B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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