JEB logo

Journal of Environmental Biology

pISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP

About Journal
    Home
    Editor in Chief
    Editorial Board
    Reviewer Panel
    Publication Policies
    Guidelines for Editors
    Guidelines for Reviewers
    Abstracting and Indexing
    Subscription and Payments
    Contact Journal
 
Read Journal
    Current Issue
    Journal Archives
 
For Authors
    Guidelines for Authors
    Terms and Conditions
    Fees and Payments
    Track Paper Status
 
Announcements
    JEB Awards
 

Google Search the Journal web-site:


    Abstract - Issue Sep 2012, 33 (5)                                     Back


nstantaneous and historical temperature effects on a-pinene

Variations in phytoplankton carbon biomass, community

assemblages and species succession along Lake

Burullus, Northern Egypt

 

Author Details

 

Elham M. Ali

(Corresponding author)

Department of Environmental Sciences, Faculty of Science at Suez, Suez Canal University? ???????????? ?Egypt.

e-mail: elhamali05@yahoo.co.uk.

Hanan M. Khairy

National Institute of Oceanography and Fisheries, Kayet Bay, Alexandria, Egypt.

 

 

 

Publication Data

Paper received:

22 January 2011

 

Revised received:

25 July 2011

 

Accepted:

06? August 2011

 

Abstract

Phytoplankton assemblages and species succession along Lake Burullus (Southern Mediterranean) is expressed as carbon biomass (mg cm-3) using a standard spreadsheet based on the species cell volume cell-1 carbon relationship. High Chl a levels were measured (maximum 85-126 mg m-3) reflecting a dense phytoplankton population (up to 8.3 x 103 cell ml-1 and 5.5 x 103 mg cm-3) throughout the lake body with maximum concentrations at the western sector of the lake (S1). A diverse phytoplankton community was determined. Cell count data revealed the dominance of a mixed phytoplankton taxa, however biomass data indicates over-dominance of Bacillariophyceae (up to 98%). Good correlation (r=0.73, p<0.05) was found between Chl aand carbon biomass with various cell carbon/chl a ratio according to variations in community structure. Bacillariophyceae were the most dominant, particularly at the middle (S2) and the western parts (S1) during periods of high nutrient (silicate) and good weather conditions (during spring/summer months). Chlorophyceae were abundant with Scenedesmus sp. mostly dominant, particularly at P-rich sites. Dinoflagellates peaked only during calm and high light summer months (May ? July) being at a maximum level at S1. Euglenophyceae were less contributed to total phytoplankton abundance and peaked only; as a transition stage; at S1 during Jannuary and March (winter months). Cyanophyceae were numerous along with maximum peak at S2 affected by the southern drains. Excessive nutrient enrichment into the lake alters the existent structure of phytoplankton community. The water quality index indicated a poor water quality status of the lake.This may led to increase the possibility of toxic algal blooms to invade the lake ecosystem and, in turn, affect the lake fish yield.

 

Key words

Phytoplankton, Inland lakes, Water quality, Carbon biomass, Cell count, GIS mapping

 

Copyright ? 2012 Triveni Enterprises. All rights reserved. No part of the Journal can be reproduced in any form without prior permission. Responsibility regarding the authenticity of the data, and the acceptability of the conclusions enforced or derived, rest completely with the author(s).