This work aims to identify for the first time the benthic diatoms of the Tilesdit dam in the Bouira region (Northern of Algeria) and to determine the factors influencing their distribution. The objective is also to assess their role as bio-indicators of water quality. This study highlighted the relationship between physicochemical parameters and the seasonal distribution of diatom species collected monthly from January 2021 to December 2021. The sampling sites for the biological study were selected downstream of the dam based on environmental criteria. Diatoms were collected and processed according to the NFT 90-345 standard. In parallel, physico-chemical parameters were measured in situ or analyzed in the laboratory using standard methods. The number of species was 40, belonging to 24 genus and 8 families. The most abundant family was Naviculaceae (27.45%). Among the dominants families, those that predominate are Achnanthaceae in autumn (48%), Naviculaceae in summer (67.48%), Coxinodiscaceae in spring (37.70%) and Achnanthidiaceae in winter (34.71%). Principal Component Analysis (PCA) revealed that diatom distribution in Tilesdit Dam is driven by key environmental factors, including dissolved oxygen, conductivity, pH, and nutrients. Meridion, Cyclotella, and Achnanthes were associated with well-oxygenated, mineralized waters, while Fragilaria, Melosira, and Amphipleura thrived in nutrient-rich conditions, indicating eutrophication. These results confirm the strong response of diatoms to water quality variations, reinforcing their use as bioindicators. According to the results obtained, this site is characterized by good water quality, with a seasonal disturbance occurring in spring.
Aouadi, I. and Zouggaghe, F. (2025). Environmental parameters and diversity of benthic diatoms in Tilesdit dam, Northern of Algeria. Pollution, (), -. doi: 10.22059/poll.2025.385715.2659
MLA
Aouadi, I. , and Zouggaghe, F. . "Environmental parameters and diversity of benthic diatoms in Tilesdit dam, Northern of Algeria", Pollution, , , 2025, -. doi: 10.22059/poll.2025.385715.2659
HARVARD
Aouadi, I., Zouggaghe, F. (2025). 'Environmental parameters and diversity of benthic diatoms in Tilesdit dam, Northern of Algeria', Pollution, (), pp. -. doi: 10.22059/poll.2025.385715.2659
CHICAGO
I. Aouadi and F. Zouggaghe, "Environmental parameters and diversity of benthic diatoms in Tilesdit dam, Northern of Algeria," Pollution, (2025): -, doi: 10.22059/poll.2025.385715.2659
VANCOUVER
Aouadi, I., Zouggaghe, F. Environmental parameters and diversity of benthic diatoms in Tilesdit dam, Northern of Algeria. Pollution, 2025; (): -. doi: 10.22059/poll.2025.385715.2659
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