WorldCat Identities

El-Sayed, Sayed Z. (Sayed Zakaria) 1926-2005

Overview
Works: 115 works in 152 publications in 1 language and 595 library holdings
Genres: Conference papers and proceedings  Charts, diagrams, etc  Maps  Academic theses  Bibliography  Field guides  Observations 
Roles: Author, Editor, Other
Publication Timeline
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Most widely held works about Sayed Z El-Sayed
 
Most widely held works by Sayed Z El-Sayed
Southern Ocean ecology : the BIOMASS perspective( Book )

7 editions published in 1994 in English and held by 232 WorldCat member libraries worldwide

Biological investigations of marine Antarctic systems and stocks (BIOMASS) by SCAR/SCOR Group of Specialists on Living Resources of the Southern Ocean( Book )

7 editions published between 1977 and 1981 in English and held by 39 WorldCat member libraries worldwide

Chemistry, primary productivity, and benthic algae of the Gulf of Mexico( )

1 edition published in 1972 in English and held by 33 WorldCat member libraries worldwide

Antarctic aquatic biology : proceedings of the Regional Symposium on Recent Advances in Antarctic Aquatic Biology with Special Reference to the Antarctic Peninsula Region held in San Carlos de Bariloche, Argentina, 6-10 June, 1983 by Regional Symposium on Recent Advances in Antarctic Aquatic Biology with Special Reference to the Antarctic Peninsula Region( Book )

4 editions published in 1987 in English and held by 18 WorldCat member libraries worldwide

Study of primary productivity in Drake Passage (Southern Ocean) : first annual report, 1 January 1962-31 December 1962 by Texas A & M University System( )

2 editions published in 1963 in English and held by 18 WorldCat member libraries worldwide

Chemistry, primary productivity, and benthic algae of the Gulf of Mexico( Book )

2 editions published in 1972 in English and held by 15 WorldCat member libraries worldwide

Biological studies of the Southern Ocean : research plans and international coordination by Sayed Z El-Sayed( Book )

3 editions published in 1986 in English and held by 13 WorldCat member libraries worldwide

Summary of various activities of international organizations with interest in studies of Southern Ocean ecosystems and their living resources. Presents useful outline of future biological research during next decade
Antarctic map folio series( Book )

5 editions published between 1967 and 1970 in English and held by 10 WorldCat member libraries worldwide

Antarctic map folio series by C. R Bentley( Book )

5 editions published between 1964 and 1975 in English and held by 10 WorldCat member libraries worldwide

Morphology, taxonomy, and distribution of selected diatom species of Thalassiosira Cleve in the Gulf of Mexico and antarctic waters by Greta A Fryxell( Book )

1 edition published in 1975 in English and held by 8 WorldCat member libraries worldwide

Cultures of marine phytoplankton have Increasing value in morphological and taxonomic studies. Fifteen species of Thalassiosira have been studied from culture and field samples in both light and scanning electron microscopes, revealing consistent patterns that may be used in identification and taxonomic placement. Process patterns are considered good diagnostic characters, especially the patterns of strutted and labiate processes. The position of the strutted process inside or outside radial rows of areolae on the face of the valve is suggested to be of potential taxonomic value. The presence of spines is noted on a few species. The newly observed occluded process is found on three of the species discussed in detail; T. lundlana. T. tub!fera, and T. australis. Distributional data are considered in placing the diatoms in ecological categories. Suggested taxonomic groupings within the genus are based on the nature and placement of processes and patterns of areolae. Species discussed include: T. oestrupll. T. symmetrica. T. punctifera. T. elsayedil. T. eccentrica. T. lundiana, T. tublfeir. T. rotula, T. fluvlatilis. T. gracilis. T. tumlda. T. australis. and T. gravida
Antarctic aquatic biology by Regional Symposium on Recent Advances in Antarctic Aquatic Biology with Special Reference to the Antarctic Peninsular Region( Book )

2 editions published in 1987 in English and held by 6 WorldCat member libraries worldwide

Productivity studies along the Argentine Coast in the Drake Passage and in the Weddel Sea : semi-annual report, 1 November 1963-30 April 1964 by Texas A & M University System( Book )

2 editions published between 1964 and 1965 in English and held by 5 WorldCat member libraries worldwide

The contribution of Texas A & M University to Antarctic science : four decades of science and discovery on the ice, 1957-1996 by Sayed Z El-Sayed( Book )

2 editions published in 1996 in English and held by 5 WorldCat member libraries worldwide

Simulation of the pelagic ecosystem of the Ross Sea, Antarctica: a time varying compartmental model by Katherine Anne Green( Book )

1 edition published in 1975 in English and held by 4 WorldCat member libraries worldwide

Linear compartmental models with time varying transfer coefficients are suitable representations for ecosystems on both theoretical and practical grounds. Advantages of the use of models to study whole ecosystems include: (1) the ability to handle complex, dynamic processes including feedback, (2) efficient use of available information through incorporation of systems theory and knowledge of ecosystem dynamics along with data in a synthetic framework, and (3) quantitative sensitivity analysis results not obtainable through intuition alone. Models for the marine environment have dealt with photosynthesis, grazing, and nutrient dynamics. No complete ecosystem models for specific marine systems have been previously developed. The pelagic ecosystem of the Ross Sea is characterized by: an ice community, primary production which is light rather than nutrient limited, the central position of zooplankton in the food web, unusually high interconnections among the carnivores, and extreme seasonal changes in available light and ice extent. Compartments for the Ross Sea model are ice algae, ice community invertebrates, phytoplankton, zooplankton, fish, cephalopods, penguins, seals, whales, detritus and decomposers, dissolved organic carbon, and inorganic nutrients. Model transfers include donor controlled food web pathways and exchanges with the environment. The mathematical model for the Ross Sea is a set of linear differential equations with time varying coefficients. All parameters in the model were given numerical values based on ELTANIN Cruise 51 data and supplementary information from the literature. The model produced an annual cycle with good agreement between modeled and observed values for all compartments and primary production. Sensitivity analysis of the model was based on variations in incident solar radiation, initial values of the state variables, and turnover rates for selected compartments. Ice algae, phytoplankton, ice invertebrates, and zooplankton were the most variable compartments in the model. Detritus and dissolved organic carbon were the most stable. Sensitivity analysis results indicate (1) that nutrient regeneration is important in the Ross Sea, (2) that winter producer stocks are important to production levels in the following year, (3) that penguins may be sensitive indicators of system state, (4) that heavy krill harvesting or large increases in whale numbers would probably result in reductions of other animal populations, and (5) that the ecosystem is very responsive to changes in primary production, but fluctuations are damped in higher trophic levels and with time. The Ross Sea model is the most complete and most realistic of marine models developed so far
Biological productivity investigations of the Pacific sector of the Antarctic : final report by Sayed Z El-Sayed( Book )

2 editions published in 1968 in English and held by 4 WorldCat member libraries worldwide

On the biological productivity of the Gulf of Mexico with special reference to the region off Panama City, Florida by Sayed Z El-Sayed( Book )

1 edition published in 1967 in English and held by 4 WorldCat member libraries worldwide

The 1958-59 McNary Dam light guiding studies by Paul E Fields( Book )

1 edition published in 1959 in English and held by 4 WorldCat member libraries worldwide

 
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Audience Level
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  Kids General Special  
Audience level: 0.70 (from 0.62 for Chemistry, ... to 0.96 for Antarctic ...)

Southern Ocean ecology : the BIOMASS perspective
Covers
Alternative Names
El-Sayed, S. Z. 1926-2005

El-Sayed, S. Z. (Sayed Zakaria), 1926-2005

el-Sayed, Sayed Zakaria 1926-

El-Sayed, Sayed Zakaria El- 1926-

Sayed, Sayed Z. el 1926-

Sayed, Sayed Z. El- 1926-2005

Sayyid, Sayyid Zakarīyā 1926-2005

Languages
English (49)