Articles by Keyword: Estuary

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We found 86 results for you
  1. THE LAKE ST. LUCIA SYSTEM—A RESEARCH ASSESSMENT

    THE LAKE ST. LUCIA SYSTEM—A RESEARCH ASSESSMENT

    Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences
    This paper assesses the research undertaken at Lake St. Lucia over the past 25 years based on over 300 documents from that period. Trends related to both time and subject matter are evident, and these are considered in relation to...
  2. A REVIEW OF THE ICHTHYOFAUNA OF THE MHLATHUZE ESTUARY

    A REVIEW OF THE ICHTHYOFAUNA OF THE MHLATHUZE ESTUARY

    Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences
    The fish fauna of the Mhlathuze estuary was reviewed making reference to surveys dating from 1948 to 1997. The concept of Estuarine Dependence Category was employed to describe species affinities with the marine, estuarine and freshwater environments.
  3. HETEROTROPHIC UTILIZATION OF ACETATE AND GLUCOSE IN SWARTVLEI, SOUTH AFRICA

    HETEROTROPHIC UTILIZATION OF ACETATE AND GLUCOSE IN SWARTVLEI, SOUTH AFRICA

    Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa
    The utilization of dissolved organic compounds in Swartvlei was measured by the addition of single concentrations of 14C-labelled acetate and glucose to water samples, The results indicated acetate uptake was greatest in the aerobic zone while glucose was predominantly utilized...
  4. DECOMPOSITION IN ESTUARINE ECOSYSTEMS

    DECOMPOSITION IN ESTUARINE ECOSYSTEMS

    Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa
    The varied sources of estuarine plant detritus and the processes and organisms involved in its decomposition are discussed in this review. In the case of emergent and peripheral vegetation, microbial decomposition commences in the phylloplane, with fairly rapid leaching of...
  5. Covariance Analysis of Chlorophyll Distribution in the Sundays River Estuary, Eastern Cape

    Covariance Analysis of Chlorophyll Distribution in the Sundays River Estuary, Eastern Cape

    Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences
    An analysis of covariance performed on chlorophyll a distribution data from the Sundays River estuary identified five persistent water masses with significantly different chlorophyll a contents. These corresponded to different hydrodynamic regions within the estuary. The relationship between salinity and...
  6. The Evolution of Thermohaline Structure in a Closed Estuary

    The Evolution of Thermohaline Structure in a Closed Estuary

    Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences
    Following the closure of the mouth of the Palmiet estuary in February 1988, the thermohaline structure was recorded at approximate weekly intervals. The evolution of the two-layer structure was studied and the mixing processes causing the changes were determined. Vertical...
  7. CIRCULATION IN HIGHLY STRATIFIED SOUTHERN AFRICAN ESTUARIES

    CIRCULATION IN HIGHLY STRATIFIED SOUTHERN AFRICAN ESTUARIES

    Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences
    The nature of estuarine circulation under highly stratified conditions is reviewed in the context of southern African estuaries that are small and have a constricted connection to the ocean. While the focus is on the generic hydrodynamic processes and features,...
  8. FLUX OF INORGANIC NUTRIENTS AND PARTICULATE CARBON BETWEEN A <em>SPARTINA MARITIMA</em> SALT MARSH AND THE SWARTKOPS ESTUARY, EASTERN CAPE

    FLUX OF INORGANIC NUTRIENTS AND PARTICULATE CARBON BETWEEN A <em>SPARTINA MARITIMA</em> SALT MARSH AND THE SWARTKOPS ESTUARY, EASTERN CAPE

    Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences
    The flux of dissolved inorganic nutrients (NH4-N, NO2-N, NO3-N, SRP) and suspended particulates (particulate organic carbon POC, and particulate inorganic carbon PIC) was measured across the mouth of a small creek draining a portion of the intertidal Spartina salt marsh...
  9. RELATIVELY NEGATIVE δ<sup>13</sup>C RATIOS OF MESOZOOPLANKTON IN THE SUNDAYS RIVER ESTUARY, COMMENTS ON POTENTIAL CARBON SOURCES

    RELATIVELY NEGATIVE δ<sup>13</sup>C RATIOS OF MESOZOOPLANKTON IN THE SUNDAYS RIVER ESTUARY, COMMENTS ON POTENTIAL CARBON SOURCES

    Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences
    Mesozooplankton, submergent and fringing macrophytes and particles suspended in the water column in the Sundays River estuary South Africa were analyzed for δ13C isotope ratios. Highly negative values (−28.3‰ to −32.0‰) for the mesozooplankton species suggest the possibility of phytoplankton...
  10. SALINITY, FLOODS AND THE INFAUNAL MACROBENTHIC COMMUNITY OF THE ST LUCIA ESTUARY, KWAZULU-NATAL, SOUTH AFRICA

    SALINITY, FLOODS AND THE INFAUNAL MACROBENTHIC COMMUNITY OF THE ST LUCIA ESTUARY, KWAZULU-NATAL, SOUTH AFRICA

    Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences
    The St Lucia estuary and lake comprise some 80 % of the estuarine area of KwaZulu-Natal. The system is subject to floods and hypersaline conditions, the latter twice exceeding 100 since 1970. The lake is connected to the sea by...