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Study of the phytoplankton population of Bacillariophyta group observed at different stations of the headwaters of the Gheshlagh and Gaveh and Sirvan rivers
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Fatemeh Sadat Tahami *   , Mohammad Ali Afraei Bandpei , Narges Alishah , Ehteram Sadat Alavi Tabari , Sharareh Firouzkandian |
| Caspian Sea Ecology Research Institute, National Fisheries Science Research Institute, Agricultural Jihad Research, Education and Extension Organization, Mazandaran, Sari, Iran |
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Abstract: (1230 Views) |
In any aquatic ecosystem, studying the phytoplankton of that ecosystem is of particular importance. With such a study, appropriate solutions can be presented for sustainable production and exploitation, and most importantly, job creation in the region. It is also possible to exploit these resources with the cooperation of fishermen through the formation of fishing cooperatives, which will significantly contribute to creating employment in the region. This research was conducted at 6 stations at the headwaters of the Qeshlaq, Gaveh Rood, and Sirvan branches, including Station 1 (upstream of Qeshlaq under the bridge), Station 2 (Qeshlaq branch before the treatment plant), Station 3 (Qeshlaq branch after the treatment plant), Station 4 (Qeshlaq branch), Station 5 (Gaveh Rood branch), and Station 6 (Sirvan branch). According to this study, in April, 44 species of Bacillariophyta were observed with a density of (85%), in May, 46 species and a density of (80%), in June, 32 species and a density of (80%), in July, 15 species and a density of (60%), in August, 17 species and a density of (60%), in September, 30 species and a density of (60%), in October, 17 species and a density of (40%), in November, 20 species and a density of (80%), in December, 18 species and a density of (42%), in January, 23 species and a density of (41%), in February, 28 species and a density of (64%), and in March, 31 species and a density of (43%) from this phylum. In this study, the Shannon-Wiener index was obtained in the range of 2.25 to 3.33, and the studied area has different conditions in terms of pollution load in different months. It can be stated that the studied area contained clean water in the months of April, May, June, September, November, February, and March, and the water was polluted in the months of July, August, October, December, and January.
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| Keywords: Phytoplankton, Ecosystem, Sirvan River, Kordestan |
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Full-Text [PDF 1076 kb]
(354 Downloads)
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Type of Study: Research |
Subject:
Special
Received: 2025/06/6 | Accepted: 2025/07/1 | Published: 2025/07/19
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