Spatial Distribution of Asterionella formosa Hassall, Cyclotella ocellata Pantocsek and Fragilaria crotonensis Kitton in the Zayandehrud Reservoir Dam, Iran | ||
| ECOPERSIA | ||
| Article 7, Volume 3, Issue 3 - Serial Number 13, 2015, Pages 1119-1132 PDF (1013.77 K) | ||
| Author | ||
| Behrouz Zarei Darki* | ||
| Assistant Professor, Department of Marine Biology, Faculty of Marine Sciences, Tarbiat Modares University, Iran | ||
| Abstract | ||
| The main diatomic structure-forming species of the Zayandehrud Reservoir was investigated by collecting samples from the surface, five, seven and 10 m depths from January 2011 to October 2012 along four linear transects. Asterionella formosa Hassall, Cyclotella ocellata Pantocsek and Fragilaria crotonensis Kitton were revealed as the three structure-forming species among diatomic algae in the reservoir. The number of these diatomic cells increased from the reservoir banks to its central areas, but their abundance was non-uniformly distributed at the 10-meter water column at different sites, except for C. ocellata that showed a practically uniform distribution at the peak of its maximum growth. Overall, the frequency and cover of these structure-forming diatoms changed under the influence of different abiotic variables such as electrical conductivity (EC) and nitrate (NO3-N). | ||
| Keywords | ||
| Dam lake; Diatoms; Phytoplankton; Structure-forming species | ||
| References | ||
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