Species composition and population density of Phytoplankton of Great Bitter Lake, Suez Canal, Egypt. | ||||
| Taeckholmia | ||||
| Article 1, Volume 21, Issue 2, 2001, Page 187-203 PDF (218.64 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/taec.2001.12464 | ||||
 View on SCiNiTO | ||||
| Author | ||||
| Mona Gab Allah* | ||||
| Botany Department, Faculty of Science, Ismailia, Suez Canal University. | ||||
| Abstract | ||||
| The structure and dynamic of phytoplankton assemblages in Great Bitter Lakes were studied seasonally during the period from May 1999 to February 2000. Population density varied between112198X103 cells. l-1 in spring and 2382X106 cells. l-1 in winter. In terms of cell number, Bacillariophyceae was the most important group (mean annual percentage contribution was 67%), which remained dominant throughout the study period. Cyanophyceae ranked the second abundant group (14 %) dominated in autumn and winter. The contribution of Dinophyceae and Chlorophyceae were 8.6 and 7.3% respectively. The other classes contributed with very low share of the total phytoplankton. The relationship between phytoplankton composition and physico-chemical variables was studied. CCA analysis indicated that water salinity, and temperature are the most important factors affecting phytoplankton distribution. The trophic status index indicated that the lake ranked between mesotrophic and moderately eutrophic. In winter, the lake was under blooming due to the luxuriance growth of Nitzschia pseudo delicatissima Hasle. and Phormidium sp. The impact of pollution was significantly effective in the western side of the lake compared to the eastern one. | ||||
| Keywords | ||||
| phytoplankton; Bitter Lakes; trophic status; C.C.A; Ecology; Taxonomy | ||||
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