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  • 1
    Online-Ressource
    Online-Ressource
    San Diego :Elsevier Science & Technology,
    Schlagwort(e): Estuarine oceanography -- Congresses. ; Coasts -- Congresses. ; Marine sediments -- Congresses. ; Electronic books.
    Materialart: Online-Ressource
    Seiten: 1 online resource (309 pages)
    Ausgabe: 1st ed.
    ISBN: 9780080537061
    Serie: Issn Series ; v.Volume 2
    DDC: 551.4609
    Sprache: Englisch
    Anmerkung: Cover -- Preface -- Contents -- Contributors -- Section 1: Hydrodynamics and suspended particulate matter in bays and back-barrier tidal basins -- Chapter 1. Hydrodynamics of Chwaka Bay, a shallow mangrove-fringed tropical embayment, Tanzania -- Chapter 2. Tidal characteristics of an accretional tidal flat (The Wash, U.K.) -- Chapter 3. Quantifying concentration and flux of suspended particulate matter through a tidal inlet of the East Frisian Wadden Sea by acoustic doppler current profiling -- Section 2: Erosion, deposition, and sediment budgets of tidal flats -- Chapter 4. Surface erosion of fine-grained sediment revisited -- Chapter 5. Comparison of the erosion shear stress of oxic and anoxic sediments in the East Frisian Wadden Sea -- Chapter 6. Mass balancing the seasonal turnover of mud and sand in the vicinity of an intertidal mussel bank in the Wadden Sea (southern North Sea) -- Chapter 7. Mass balancing the seasonal turnover of POC in mud and sand on a back-barrier tidal flat (southern North Sea) -- Section 3: Primary production, nutrient fluxes and mineralisation in shallow coastal lagoons (Bodden) of the Baltic Sea -- Chapter 8. Significance of microphytobenthic primary production in the Bodden (southern Baltic Sea) -- Chapter 9. Bodden waters (southern Baltic Sea) as a source of methane and nitrous oxide -- Chapter 10. Geochemical investigations of iron and manganese in coastal sediments of the southern Baltic Sea -- Chapter 11. Phosphorus in sediments from coastal waters of Mecklenburg-Vorpommern (southern Baltic Sea) -- Chapter 12. Benthic microbial decomposition of organic matter and nutrient fluxes at the sediment-water interface in a shallow coastal inlet of the southern Baltic Sea (Nordrügensche Bodden). , Chapter 13. Significance of aerobic and anaerobic mineralization processes of organic carbon in sediments of a shallow coastal inlet in the southern Baltic Sea -- Section 4: Sediment geochemistry in salt-marshes and Holocene deposits -- Chapter 14. Effects of plant roots on salt-marsh sediment geochemistry -- Chapter 15. Elemental composition of siderite grains in early Holocene deposits of Youngjong Island (west coast of Korea), and its palaeoenvironmental implications -- Section 5: Sea-level rise, land reclamation, and resource management -- Chapter 16. The impacts of sea-level rise on the coastal fisheries resources and aquatic ecosystems of Cameroon (Central Africa) -- Chapter 17. Impacts of sea-level rise and human activities on the evolution of the Pearl River delta, South China -- Chapter 18.The combined impacts of mean sea-level rise and secular trends in mean tidal range on the marine environment in the vicinity of the Huanghe River mouth -- Chapter 19. The missing mud flats of the Wadden Sea: a reconstruction of sediments and accommodation space lost in the wake of land reclamation -- Chapter 20. The Wadden Sea squeeze as a cause of decreasing sedimentary organic loading -- Chapter 21. The utilization of coastal tidal flats: a case-study on Integrated Coastal Area Management from China.
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  • 2
    Schlagwort(e): Forschungsbericht ; Watt ; Ökosystemforschung
    Materialart: Online-Ressource
    Seiten: 235 p. = 3228 kB, text and images
    Ausgabe: [Electronic ed.]
    Sprache: Deutsch
    Anmerkung: nIndex. - Contract no. BMBF 03F0112A,B. - Bibliographic datas partially researched , Differences between the printed and electronic version of the document are possible
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  • 3
    ISSN: 0146-6380
    Schlagwort(e): Quaternary ; alkanes ; alkenones ; chemometrics ; climate ; cyclicity ; dinosterol ; principal component analysis ; spectral analysis ; δ^1^8O foraminifera
    Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Thema: Chemie und Pharmazie , Geologie und Paläontologie
    Materialart: Digitale Medien
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    Amsterdam : Elsevier
    Tetrahedron Letters 20 (1979), S. 237-238 
    ISSN: 0040-4039
    Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 5
    ISSN: 1432-1793
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Fluctuations and interactions of the following microbiological variables and sediment properties were investigated on samples from sandy beaches of the Baltic Sea: bacterial number and biomass, net uptake and respiration rate of 14C-glucose (U), concentration of natural free dissolved glucose and fructose, actual uptake rate and turnover time of glucose, sand-grain size and shape, water and organic matter content of the sediment. Spearman rank correlation analysis demonstrated significant relationships between cell number, biomass and actual uptake rate of glucose. The concentration of natural glucose varied with sand-grain shape, and the uptake rates of glucose were inversely correlated with the water content of the sediment. In the overlying water, cell number and/or biomass were significantly correlated with both concentration and uptake rates of glucose. Partial correlation analysis, however, indicates that, in the water overlying the sediment at least one of the standing crop variables (bacterial number or biomass) is independently variable with uptake activity. The sediment bacterial standing crop does not necessarily reflect metabolic activity. Various significant interactions were noted between mainly sediment properties (water content, organic matter content, grain size) and variables in the water above (cell number, biomass, concentration and uptake rates of glucose).
    Materialart: Digitale Medien
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  • 6
    Digitale Medien
    Digitale Medien
    Springer
    Marine biology 62 (1981), S. 209-216 
    ISSN: 1432-1793
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract In 5 different aquatic biotopes, widely differing in salinity as well as in degree of eutrophication and pollution, the concentration of dissolved free glucose was measured employing ion exchange chromatography of sugar borate complexes. The concentrations of glucose ranged from 4.99 to 9.63 μg C 1-1. No correlation between the amounts of glucose and the trophic character of the biotope was evident. The parameter Kt+Sn (sum of the transport “constant” and the natural concentration of glucose) was determined using a microbiological method. Instead of being larger, the Kt+Sn values were smaller than the concentrations obtained chemically. The range was between 0.62 and 2.72 μg glucose- C 1-1. Expressed as percentages the Kt+Sn values were between 6.4 and 30.5% of the concentrations of glucose alone. No gross errors of the microbiological and chemical methods seem to be responsible for these large discrepancies, since internal standardization gave excellent results. Two reasons might account for the discrepancy: (1) Not all of the dissoved free glucose (existing as truly free, absorbed or complexed free glucose) is available to the heterotrophic microorganisms. (2) During the relatively short duration of the experiments, the added 14C-labelled glucose may not be proportionally distributed between the different fractions of the dissolved free glucose. Instead, the fraction of the truly free glucose might be higher specifically labelled than the absorbed and complexed ones. This would lead to an over-representation of the presumably small fraction of the truly free form. It is concluded that using the concentration of the dissolved free substance obtained by chemical analysis to calculate the flux might be misleading.
    Materialart: Digitale Medien
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  • 7
    Digitale Medien
    Digitale Medien
    Springer
    Polar biology 2 (1984), S. 225-228 
    ISSN: 1432-2056
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary The composition and depth distribution of particulate carbohydrates for 5 stations in the Bransfield Strait is discussed in relation to phytoplankton species composition. Glucose being the most prominent sugar at diatom dominated stations is reduced by 70% from the surface to 100 m depth whereas total carbohydrates show a 40% degradation. Values for a haptophyceae dominated station are 95 and 80%, respectively.
    Materialart: Digitale Medien
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 8
    ISSN: 1432-1793
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract The gutless marine oligochaetes Phallodrilus leukodermatus and P. planus are known to contain bacteria in their tissues. In this study, we demonstrate that these worms, collected and studied 1982 in Bermuda, contain enzymes characteristic for chemoautotrophic bacteria, as has previously been shown for pogonophorans and some bivalve moliuscs. The enzymes are ribulose-1.5-diphosphate carboxylase (RuBPCase), ATP-sulfurylase, sulfite oxidase and nitrate reductase. Adenosinephosphosulfate reductase and rhodanese could not be detected. In addition, P. leukodermatus was tested for the ability to take up and metabolize radiolabeled bicarbonate and glucose from the surrounding seawater. During incubation periods of up to 6 h. most of the radioactivity administered as bicarbonate was found in malate and succinate; sugars and sugar phosphates were heavily labeled only after short incubation periods of up to 30 min. In comparison to bicarbonate, glucose was taken up from the medium slewly. The quantitative importance of the fixation of bicarbonate versus uptake of dissolved organic matter for the worms' metabolic needs are discussed.
    Materialart: Digitale Medien
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  • 9
    ISSN: 1573-5117
    Schlagwort(e): aquatic Oligochaeta ; gutless oligochaetes ; structure ; ecology ; physiology
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Phallodrilus leukodermatus is not only characterized by the complete absence of mouth, gut, anus and nephridia, but also by an exceptional dermal ultrastructure which is associated with gram-negative bacteria. The vertical distribution of the worms from Bermudian carbonate sands is also unusual in attaining population maximum at oligoxic or anoxic depths around the redox discontinuity (RPD) layer, where extremely high concentrations of amino acids and sugars are to be recorded. Based on results from current ecophysiological and ultrastructural studies, an interpretation of the unique biology of the worms is attempted.
    Materialart: Digitale Medien
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  • 10
    Digitale Medien
    Digitale Medien
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 6 (1983), S. 573-574 
    ISSN: 0935-6304
    Schlagwort(e): Reversed phase HPLC ; Fluorimetric detection ; Fossil chlorins ; Chemistry ; Analytical Chemistry and Spectroscopy
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Zusätzliches Material: 1 Ill.
    Materialart: Digitale Medien
    Standort Signatur Einschränkungen Verfügbarkeit
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