Publication Date:
2021-05-19
Description:
In this stydy, 486 species belonging to 12 divisions were classified in the Caspian Sea (Iranian waters). The
number of dominant species in each division and the percentage of that, such as Baccillariophyta, Chlorophyta,
Cyanophyta, Pyrrophyta and Euglenophyta were 186 (38%), 110(22%), 80 (16%), 71 (14%) and 28( 6%)
respectively. There were a few numbers of Exanthophyta, Chrysophyta, Haptophyta, small felaggelate
Ochrophyta and Cryphophyta divisions. The numbers of these divisions’ species are ranged from 1-5 species. In
Baccillariophyta, genera such as Navicula ( 24 species,15%), Nitzchia (22 species, 13%) and Chaetoceros (18
species, 11%) were dominante. In Chlorophyta division, The highest number of taxa belonged to Oocystis genus,
which included 10 species and comprasing 16% of predominant species. Scenedesmus genus is in the second
place ( 9 species , 14% ). In cyanophyta, the number of species, Anabaena, Oscillatoria and Microcystis are 9, 9
and 7, and 17%, 17% and 13 %t of all predominant species. In Pyrrophyta division , Peridinium genus with 11
species and 22% is dominant. Glenodinium and Gymnodinium are ranked after Peridinium. From
Euglenophyta, genera such as Euglena and Trachelomonas are dominant. The number of species are 13 and
11species respectively. Euglena genus comprising 50% of all dominant species. A total of 807 phytoplankton
species were distinguished in inland waters ecosystems. 284 species(36%) Baccilariophyta, 241 species (30%)
Cholorophyta, 144 species (18%) Cyanophyta, 59 species (7%) Euglenophyta, 57(7%) pyrrophyta are listed in
database. Divisions of Chrysophyta, Exantophyta and Cryptophyta have a few numbers (6,4 and 3
respectively).from Baccilariophyta, Nitzchia and Navicula with 45 and 28 species make up 23% and 14% of the
dominant species, respectively. In chlorophyta division,genera such as Scenedesmus ( 30 species ranking first
place among dominant species) and Cosmarium (18 species second place) are distinguished. From Cyanophyta,
genera Phormidium, Chrococcus, Oscillatoria and Lyngbia have the highest number of species that have 13, 12,
9 and 9 species respectively. These species accounted for 12%, 11%, 9% and 9% of dominant species
respectively. In Euglenophyta, Euglena and Trachelomonas are dominated. These genera accounted for 21
species (39%) and 15 species ( 28%) of dominant species. From Pyrrophyta, Peridinium genus is dominant
which includes 30% of dominant species. Gymnodinium with 8 species ( 17%) is in the second place.
Description:
Iranian Fisheries Science Research Institute
Description:
Published
Keywords:
Phytoplankton
;
Species
;
Exanthophyta
;
Chrysophyta
;
Haptophyta
;
Ochrophyta
;
Cryphophyta
Repository Name:
AquaDocs
Type:
Report
,
Refereed
Format:
62pp.
