Publication Date:
2021-05-19
Description:
Phytoplankton groups are very important producers in the anzali lagoon that have a significant role in the
quality of water and the need to be constantly study their sequence and density.The surveywas conducted
in six workstations March 1389-Feb 2012. Samples were taken for a liter of water with plicae (P.V.C) and
fixed with formalin to 4% ratio. Five ml of the sample after becoming homogeneous, was sequestration for
24 hours in the laboratory and identified and counted by invert microscope. Based on the results of this
reviews 67 genus (22, 26, 9, 5, 1, 2, 1, and 1 genus respectively of the Bacillariophyta, Chlorophyta,
Cyanophyta branches, Cryptophyta, Euglenophyta Chrysophyta, Pyrrophyta, the Xanthophyta)
were identified. The results showed that the phytoplankton density was the most in Sorkhankol and Komeh
Aghajani stations with annual average of 24387483±5643414 and 20381250 ± 5488084 per liter respectively.
The Bacillariophyta ( particularly Cyclotella) was dominant in all of stations but high density of blue green
algae (Cyanophyta) in Komeh aghajani station from July to mid-October have caused the annual average
of these phylum is more than Bacillariophyta. In General, the average density of phytoplankton was the highest
in summer than other seasons and was the lowest value in the fall. The number of the genus identified in this
survay is less than previous studies. Compare this survey with the last studies reviews shows that diversity is
reduced in the current situation in the anzali than previous studies. According to thestatistical analysis of
the Kruskal Wallis, the density of phytoplankton had no significant differences in the different months, stations
and seasons (p 〉0.05) but the phytoplankton phylums have significant differences (p 〈 0.05) together.
Description:
Iranian Fisheries Science Research Institute
Description:
Published
Keywords:
Diversity
;
Phytoplankton
;
Density
Repository Name:
AquaDocs
Type:
Report
,
Refereed
Format:
50pp.
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