Structure and Biochemical Analysis of Phytoplankton in the Wadi El-Rayan Lakes, El-Fayoum, Egypt. | ||
| Egyptian Journal for Aquaculture | ||
| Article 6, Volume 11, Issue 2, June 2021 PDF (574.98 K) | ||
| Document Type: Research article | ||
| DOI: 10.21608/eja.2021.68936.1047 | ||
| Authors | ||
| Soaad Ahmed Sabae* ; Abeer MA Mahmoud | ||
| Hydrobiology, National institute of oceanography and fishries | ||
| Abstract | ||
| Wadi El-Rayan lakes are an important source of irrigation water and fisheries in El-Fayoum Governorate, Egypt. Phytoplankton is an important bioindicator of the chemical and biological changes in natural ecosystems including the Wadi El-Rayan lakes. Seasonal and regional variations lead to concomitant changes in the total protein, carbohydrate, and lipid contents of phytoplankton; such changes affect the nutritional quality of food available in the aquatic system. In the present study, these changes were determined in the phytoplankton of Wadi El-Rayan lakes. The maximum protein (27.95 & 11.36 mgL-1) contents were detected in summer and winter respectively. The maximum carbohydrate content was detected in autumn and winter (1.76 and 1.12 mgL-1 at site 8 and 4 respectively).The maximum lipid content was observed in winter (0.73 mgL-1 at site 6). Phytoplankton density was much higher in the upper lake than in the lower lake. In total, 92 species were identified; the phytoplankton community in the lake included typical groups such as Chlorophyceae, Cyanophyceae, Bacillariophyceae, Cryptophyceae, Dinophyceae, Chrysophyceae, and Euglenophyceae. Green alga was the dominant class, constituting 44.4%–45.0% of the phytoplankton standing crop across seasons. Cyanophyceae (29%–39%), Bacillariophyceae (9.7%–16.1%), and Dinophyceae (4.0%–9.2%) were the next most abundant classes; Cryptophyceae, Chrysophyceae, and Euglenophyceae were rarely found. | ||
| Keywords | ||
| El-Rayan Lakes; phytoplankton; biochemical analysis | ||
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