Distribution and Seasonal Variation of Nutrient Salts and Chlorophyll-a in Surface Seawater Along Alexandria Costal Zone Area
Science Research
Volume 3, Issue 4, August 2015, Pages: 180-190
Received: May 30, 2015; Accepted: Jun. 12, 2015; Published: Jul. 4, 2015
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Authors
Edweb Ali Salem Dango, High Institute in Jerpoly area, Tripoli, Libya
Mahmoud Salem Ibrahim, Environmental Science Department, Faculty of Science, Damietta University, Damietta, Egypt
Mohamed Abel Aziz Okbah, National Institute of Oceanography & Fisheries, Kayet Bay, Alexandria, Egypt
Mei Ibrahim El Gmaal, Environmental Science Department, Faculty of Science, Damietta University, Damietta, Egypt
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Abstract
The aim of the present study is to investigate the hydrographic characteristics, nutrient salts and chlorophyll-a (Chl-a) along Alexandria Costal Zone Area. The study revealed that the pH values lie slightly in the alkaline side, with a range of 7.53 to 8.12, salinity showed a slightly variation, it ranged from 35.34 to 38.28 PSU, the values of dissolved oxygen were fluctuated between 4.77 and 11.13 mgl-1. The annual average of nutrients (μM) was as follow: (7.97 ± 1.72), (0.66 ± 0.14), (2.18 ± 0.73), (0.37± 0.09) and (12.42 ± 4.04) for nitrate, nitrite, ammonium, reactive phosphate and silicate, respectively. Relatively high levels of Chl-a concentrations was recorded during the period of study ranged from 0.38 to 6.96µgl-1 and a positive correlation was found between Chl-a and both NO3, NH4, PO4 and SiO4 (r= 0.383, 0.303, 0.213 and 0.341, respectively). Very high values of N/P ratio were recorded during the study period, this consideration showed that Phosphorus was limiting factor in the study area.
Keywords
N/P Ratio, Nutrients, Chlorophyll-a, Alexandria
To cite this article
Edweb Ali Salem Dango, Mahmoud Salem Ibrahim, Mohamed Abel Aziz Okbah, Mei Ibrahim El Gmaal, Distribution and Seasonal Variation of Nutrient Salts and Chlorophyll-a in Surface Seawater Along Alexandria Costal Zone Area, Science Research. Vol. 3, No. 4, 2015, pp. 180-190. doi: 10.11648/j.sr.20150304.15
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