IDEAS home Printed from https://ideas.repec.org/a/asi/joasrj/v3y2013i10p995-1010id3551.html
   My bibliography  Save this article

The Physico-Chemical Characteristics, Chlorophyll A Levels and Phytoplankton Dynamics of the East Mole Area of the Lagos Harbour, Lagos

Author

Listed:
  • Onyema I. C
  • Popoola R. T

Abstract

The physico-chemical characteristics, phytoplankton composition and distribution at the East mole area of the Lagos harbour were investigated between January and June, 2012. The physico-chemical conditions varied between high brackish and sea water chemistry. Records were Air (26 - 330C) and Water temperatures (28 - 310C), Salinity (19.40 - 30.720/00), Nutrients (Nitrate ≥ 3.11 mg/L; Phosphate ≥ 0.65 mg/L, Sulphate ≥ 878.6mg/L), alkaline pH (7.75 – 8.48), Transparency (141.2 - 236.5cm), Alkalinity (33 - 85.2mg/L), Conductivity (32700 – 49,600 µS/cm), Dissolved Oxygen (4.8 - 5.4mg/L) and Chlorophyll a concentrations (8.5 - 10.1mg/L). Chlorophyll a concentration was positively correlated with Salinity (r = 0.81), Total Dissolved Solids (r = 0.80), Conductivity (r = 0.81), Rainfall (r = 0.13), Phosphate (r = 0.87), Sulphate (r = 0.65), Silica (r = -0.62), Nitrate (r = 0.10), Dissolved Oxygen (r = -0.38) and Air temperature (r = -0.61). The phytoplankton diversity consisted of three main algal groups namely - Diatoms, Blue-green algae and Dinoflagellates. A total of 32 species belonging to 18 genera were observed. Diatoms formed the more abundant group making up 22 species from 13 genera. The Blue-green algae recorded five species from three genera and Dinoflagellates with five species from two genera. In terms of diversity, the dry season (Jan. – Apr. 2012) recorded a relatively higher phytoplankton diversity (S) and abundance (N) than the wet season. In terms of diversity, the Diatoms, reported 68.75% (Centric - 50% and Pennate diatoms –18.75%), while the Blue-green algae and the Dinoflagellates recorded 15.63% respectively. In terms of phytoplankton abundance, the month of February recorded the highest outcome. The biological indices reflected a similar trend of occurrence as the species composition and distribution. Notable species were Coscinodiscus centralis, Coscinodiscus radiatus, Synedra crystallina, Trichodesmium thiebatii, Ceratium bicephalum and Oscillatoria trichodes.

Suggested Citation

  • Onyema I. C & Popoola R. T, 2013. "The Physico-Chemical Characteristics, Chlorophyll A Levels and Phytoplankton Dynamics of the East Mole Area of the Lagos Harbour, Lagos," Journal of Asian Scientific Research, Asian Economic and Social Society, vol. 3(10), pages 995-1010.
    • Handle: RePEc:asi:joasrj:v:3:y:2013:i:10:p:995-1010:id:3551
    as

    Download full text from publisher

    File URL: https://archive.aessweb.com/index.php/5003/article/view/3551/5625
    Download Restriction: no
    ---><---

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:asi:joasrj:v:3:y:2013:i:10:p:995-1010:id:3551. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Robert Allen (email available below). General contact details of provider: https://archive.aessweb.com/index.php/5003/ .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.