DISTRIBUTION OF PHYTOPLANKTON IN THE SOUTHWESTERN AREA OF ALEXANDRIA (ABU-QIR BAY), EGYPT | ||
| Egyptian Journal of Phycology | ||
| Article 11, Volume 9, Issue 1, 2008, Pages 147-165 PDF (1.06 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/egyjs.2008.114827 | ||
| Author | ||
| Hanan M. Khairy | ||
| National Institute of Oceanography and fisheries, Alexandria, Egypt. | ||
| Abstract | ||
| Phytoplankton samples were collected during February, April and June 2004 at fourteen stations. Phytoplankton community represented by 117 species within 66 genus from five groups (Bacillariophyceae; Dinophyceae; Chlorophyceae; Cyanophyceae and Euglenophyceae). There were some fresh, brackish, and marine species. Bacillariophyceae was the most dominant group (71 species) contributing 94.2% of the total phytoplankton counts. The phytoplankton community is generally more productive at stations 1, 2, 3, 4 and 5 that receiving discharge water from El-Tabia pumping station (Stations 1, 2, 3 and 4) and Lake Edku (St. 5). A gradual decrease was seen in phytoplankton density seawards. The major phytoplankton peak was observed at most stations during June (average 5535 x 103 unit.L-1). Skeletonema costatum was the most dominant species; it was formed 51.3%, 41.3% and 60.4% of the total phytoplankton, respectively during February, April and June. The effect of discharge water was more pronounced at St. 4 in front of El-Tabia pumping station. Species diversity index displayed narrow temporal and spatial variations from 1.02 to 2.85 nats. Throughout the bay, station 3 sustained the lowest diversity index (1.38 nats), while station 14 recorded the highest value (1.95 nats). | ||
| Keywords | ||
| Chlorophyll-a; Diversity; Eutrophication; Phytoplankton; Skeletonema costatum | ||
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