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Studying the temporal and spatial changes of different phytoplankton species in Tajan River in 2022
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Fatemehsadat Tahami *   , Mohammad Ali Afraei Bandpei , Narges Alishah , Ahad Ahmad nejad , Ehteram sadat Alavi Tabari |
| . Caspian Sea Ecology Research Center (CSERC), Iranian Fisheries Science Research Institute (IFSRI), Agricultural Research, Education and Extension Organization (AREEO) & - |
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Abstract: (131 Views) |
| Tajan River is one of the most important rivers in Mazandaran, which, in addition to playing an essential role in supplying agricultural water to a large part of agricultural land, is also one of the best habitats for native, migratory and ornamental fish. In this research, 7 stations were selected along the Tajan River from the downstream of Tajan Bridge to the mouth of the river and sampling was done monthly from May to October 2022. In phytoplankton sampling, 500 cc of Rottner sample was taken and after being fixed, it was transferred to the planktonology laboratory of the Caspian Sea Ecology Research Institute. 74 species of phytoplankton from 6 branches of Bacillariophyta, Cyanophyta, Chlorophyta, Euglenophyta, Pyrrophyta and Xanthophyta were observed. that the average density of different phytoplankton branches in the Tajan river basin, in the first three months of the year, Chlorophyta branch with averages of 47285714±103718777 (number per cubic meter) in April, 812000±156016323 (number per cubic meter) in May and 278046960±184171428 (number in cubic meters) in June was the dominant group and in August and November Bacillariophyta branch was dominant. No significant difference has been shown among any of the studied areas and they are all in the same group. However, there was a significant difference in different months of sampling. |
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| Keywords: Phytoplankton, Biological indicators, Migratory fish, Ornamental fish, Tajan River |
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Full-Text [PDF 550 kb]
(44 Downloads)
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Type of Study: Research |
Subject:
Special
Received: 2024/11/2 | Accepted: 2024/10/1 | Published: 2024/12/1
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