[Home ] [Archive]    
:: Main :: About :: Current Issue :: Archive :: Search :: Submit ::
:: Volume 20, Issue 4 (2021) ::
IJFS 2021, 20 Back to browse issues page
Research Article: Diatom community structure along physico-chemical gradients in Southern Caspian Sea (Noor shore)
B. Zarei Darki *, S. Bigham, R. Patimar
Department of Marine Biology, Faculty of Marine Sciences, Tarbiat Modares University, Noor, Mazandaran Province, Iran , zareidarki@modares.ac.ir
Abstract:   (1481 Views)
Diatom species diversity and cell abundance are influenced by environmental factors. The effect of physico-chemical factors on interseasonal dynamics of planktonic diatom community structure was examined along Noor shore of Caspian Sea to determine which of the variables impact more on the diatom diversity, distribution and cell number. Overall, 144 samples were collected during four sampling campaigns along four transects of 2 km long each with three sampling sites in 2014 (February, May, July and November). In total, 62 diatom species were identified, of which 27 species were typical marine or brackish-water and the rest were marine-freshwater or freshwater. In the present study, diatom species diversity was highest in winter. As a result, Shannon-Wiener Index was 3.5 in winter, while in spring it was reduced to 0.8. Among the revealed species, the centric Thalassiosira caspica was the most abundant (up to 2.75×106 cells L-1). Comparison of species and their abundances between coastal, middle and offshore stations, as well as all stations as a whole, showed that they differed (Test χ 2, p<0.05) except for Navicula sp. (in summer) and Ulnaria ulna (in autumn and winter). Canonical correspondence analysis results showed that in particular temperature and salinity, in the second place transparency, phosphates and to a lesser extent dissolved oxygen and pH can affect diatom species diversity and abundance. Diatoms Thalassiosira fasciculata, T. caspica and Melosira caspica may be recommended as biological indicators along the shore of Caspian Sea.
Keywords: Abundance, Bacillariophyceae, Caspian Sea, CCA analysis, Diatom diversity, Phytoplankton
Full-Text [PDF 828 kb]   (645 Downloads)    
Type of Study: Orginal research papers | Subject: Ecology
Received: 2019/12/23 | Accepted: 2020/03/14 | Published: 2021/07/19
Send email to the article author

Add your comments about this article
Your username or Email:


XML     Print

Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

Zarei Darki B, Bigham S, Patimar R. Research Article: Diatom community structure along physico-chemical gradients in Southern Caspian Sea (Noor shore). IJFS 2021; 20 (4) :945-960
URL: http://jifro.ir/article-1-4163-en.html

Rights and permissions
Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
Volume 20, Issue 4 (2021) Back to browse issues page
Iranian Journal of Fisheries Sciences Iranian Journal of Fisheries Sciences
Persian site map - English site map - Created in 0.04 seconds with 30 queries by YEKTAWEB 4570