RT - Journal Article T1 - Changing trends in the abundance and biomass of cyanobacteria in the southern part of the Caspian Sea in 2009 (The stretch between Tonekabon and Amirabad) JF - IFRO YR - 2015 JO - IFRO VO - 14 IS - 2 UR - http://jifro.ir/article-1-1263-en.html SP - 503 EP - 512 K1 - Cyanobacteria K1 - Abundance K1 - Nutrients K1 - Seasons K1 - The Caspian Sea AB - Changes in abundance and biomass of cyanobacteria have been studied in the southern part of the Caspian Sea (the stretch between Tonekabon and Amirabad) in four seasons (spring, summer, autumn, winter) in which samples were taken from five depths of 5, 10, 20, 50 and 100 meters in the stations of Tonekabon, Noushahr, Babolsar and Amirabad. Samples were fixed in formalin (2-2.5%) before transferring to the lab for both qualitative and quantitative analyses. Ten species of cyanobacteria were identified with higher abundance and biomass in the euphotic layer compared to the aphotic layer. Temperature and nutrients have shown significant differences (p LA eng UL http://jifro.ir/article-1-1263-en.html M3 ER -