Volume No. 5 Issue No.: 1 Page No.: 106-116 July-September 2010

 

CHEMICAL COMPOSITION OF SEAWEEDS AFTER THE OIL SPILL BY TASMAN SPIRIT AT THE COAST OF KARACHI, ARABIAN SEA, PAKISTAN

 

Qaisar Abbas and Rashida Qari*

Institute of Marine Science, University of Karachi, Karachi 75270, (PAKISTAN)

 

Received on : June 03, 2010

 

ABSTRACT

 

The plants of the sea especially algae have the primary importance in food chain. The present study is based on pre and post Tasman spirit oil spill incidence. To see the influence of oil spill by Tasman spirit on the chemical composition of seaweeds, five beaches Clifton, Korangi Creek, Manora, Sandspit and Buleji of Karachi coast were surveyed. A total of twenty species of seaweed belonging to eighteen genera pertaining to six green, eight brown and six red were collected. The present data reveal high variability in minor elements (Cr, Mn, Fe, Co, Ni, Cu, Zn, Cd, Hg, and Pb) concentration in seaweed along the Karachi coast with in and between seaweed species, sampling beaches and collection time. The highest concentrations of Cr (124.1±2.43 μg g−1), Mn (333.3±7.65 μg g−1), Ni (42.15±5.16 μg g−1), Fe (961.3±0.2 μg g−1) and Hg (1.07±0.001 μg g-1) were found in Manora seaweeds species as compare to other beach species. Zn (120.6±5.84 μg g−1), Cu (4.07±2.34 μg g−1) and Cd (0.96±0.15 μg g−1) concentrations were high in Buleji seaweeds species where as Pb (2.78±0.01 μg g−1) and Co (2.6±0.4 μg g−1) were high in Korangi Creek seaweeds species. Analysis of variance

 

Keywords : Minor elements, Marine plants, Heavy metal pollution, Beaches, Accumulations

 

 

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