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  • Phytoplankton  (5)
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Keywords
Years
  • 1
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    Study on monthly variation of phytoplankton in the coastal waters of Lavan Island (2018)
    Details
    Publication Date: 2021-05-19
    Description: Samples for monthly variation of phytoplankton species were collected in two stations from October 1996 till September 1997. In this study 65 species of phytoplankton related to diatoms, dinoflagellates and blue-green algae were identified. Diatoms represent 44 species (67%) related to 25 genera, followed by 18 species (26%) related to 7 genera dinoflagellates and only 3 genus (7%) belong to the blue-green algae. The diversity of diatoms species mainly composed of Rhizosolenia (12 species) and (6 species) were markedly greater than the diversity of dinoflagellates which were composed Ceratium (11 species). The diversity of both groups were significantly greater than the blue-green algae. Diatoms and dinoflagellates were abundant during periods of low salinity and temperature, meanwhile this situation was vise-versa for blue-green algae with high abundance in warm months.
    Description: Published
    Keywords: Phytoplankton ; Species ; Diatoms ; Dinoflagellates ; Blue-green algae ; Genera ; Diversity ; Rhizosolenia ; Salinity ; Temperature ; Algae
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.29-40
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  • 2
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    Correlation between changes of Chlorophyll-a and transparency in the Southern Caspian Sea (2018)
    Details
    Publication Date: 2021-05-19
    Description: Chlorophyll-a is a main pigment for photosynthetic proccess in marine phytoplankton and by it either amount of biomass can be estimated or can be considered as an index for trophic level of aquatic ecosystem. In year 1996,81 secchi disc depth were measured and 1601 samples of chlorophyll-a were collected seasonaly from the southern Caspian Sea. The results showed that average chlorophyll-a in seasonals of spring, summer, autumn and winter were 1.072,0.550, 1.848,0.966 mg/m3 and depth of transparency were 6.42,8.86, 5.62 and 5.22m, respectively. The statistical analysis showed a significant correlation (P〈0.01) between these two parameters in the southern Caspian Sea. More studies are needed to find out higher precise correlation.
    Description: Published
    Keywords: Chlorophyll-a ; Transparency ; Secchi Depth ; Phytoplankton ; Biomass ; Aquatic ; Ecosystem ; Samples
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.191-200
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  • 3
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    The density and distribution of the dominant Phytoplankton in the southern Caspian Sea (2018)
    Details
    Publication Date: 2021-05-19
    Description: The research project was comprised of four sampling cruises, which were carried out in summer 94; spring, autumn and winter 95 in the southern part of the Caspian Sea, where Chrysophyta (Diatoms) and Pyrrophyta were found to be the dominant phytoplankton. The maximum density of phylum Chrysophyta (Diatoms) was observed mainly during the autumn in the coast line (below 20 m) and in the central part of the southern Caspian Sea, while the highest density of phylum Pyrrophyta occurred during the spring in the subcoastal zone (below 50 m.). The dominant species in the phylum Chrysophyta (Diatoms) were Rhizosolenia calcar-avis, Thalossionema nitzschiodes, Sceletonema costatum, Cyclotella meneghiniane and three members of genus Coscinodiscus, among which R. calcar-avis had the highest density. Members of phylum Pyrrophyta, i.e. Exuvialla cordata, Prorocentrum scutellum and Glenodinium penardii had the highest density during the spring in the central part of the southern Caspian Sea, where E. cordata was the most abundant.
    Description: Published
    Keywords: Density ; Distribution ; Dominant ; Phytoplankton ; Chrysophyta ; Diatoms ; Pyrrophyta ; Rhizosolenia calcar - avis ; Thalossionema nitzschiodes ; Sceletonema costatum ; Cyclotella meneghiniane ; Genus ; Exuvialla cordata ; Prorocentrum scutellum ; Glenodinium penardii ; E . cordata
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.95-108
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  • 4
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    The density and distribution of the dominant phytoplankton in the southern Caspian Sea (2021)
    In:  http://aquaticcommons.org/id/eprint/23946 | 18721 | 2018-08-01 17:42:25 | 23946 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-15
    Description: The research project was comprised of four sampling cruises, which were carried out in summer 94; spring, autumn and winter 95 in the southern part of the Caspian Sea, where Chrysophyta (Diatoms) and Pyrrophyta were found to be the dominant phytoplankton. The maximum density of phylum Chrysophyta (Diatoms) was observed mainly during the autumn in the coast line (below 20 m) and in the central part of the southern Caspian Sea, while the highest density of phylum Pyrrophyta occurred during the spring in the subcoastal zone (below 50 m.). The dominant species in the phylum Chrysophyta (Diatoms) were Rhizosolenia calcar-avis, Thalossionema nitzschiodes, Sceletonema costatum, Cyclotella meneghiniane and three members of genus Coscinodiscus, among which R. calcar-avis had the highest density. Members of phylum Pyrrophyta, i.e. Exuvialla cordata, Prorocentrum scutellum and Glenodinium penardii had the highest density during the spring in the central part of the southern Caspian Sea, where E. cordata was the most abundant.
    Keywords: Biology ; Ecology ; Density ; Distribution ; Dominant ; Phytoplankton ; Chrysophyta ; Diatoms ; Pyrrophyta ; Rhizosolenia calcar - avis ; Thalossionema nitzschiodes ; Sceletonema costatum ; Cyclotella meneghiniane ; Genus ; Exuvialla cordata ; Prorocentrum scutellum ; Glenodinium penardii ; E . cordata ; Caspian Sea ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 95-108
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  • 5
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    Study on monthly variation of phytoplankton in the coastal waters of Lavan Island (2021)
    In:  http://aquaticcommons.org/id/eprint/24122 | 18721 | 2018-08-03 07:28:39 | 24122 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-15
    Description: Samples for monthly variation of phytoplankton species were collected in two stations from October 1996 till September 1997. In this study 65 species of phytoplankton related to diatoms, dinoflagellates and blue-green algae were identified. Diatoms represent 44 species (67%) related to 25 genera, followed by 18 species (26%) related to 7 genera dinoflagellates and only 3 genus (7%) belong to the blue-green algae. The diversity of diatoms species mainly composed of Rhizosolenia (12 species) and (6 species) were markedly greater than the diversity of dinoflagellates which were composed Ceratium (11 species). The diversity of both groups were significantly greater than the blue-green algae. Diatoms and dinoflagellates were abundant during periods of low salinity and temperature, meanwhile this situation was vise-versa for blue-green algae with high abundance in warm months.
    Keywords: Biology ; Fisheries ; Phytoplankton ; Lavan Island ; Hormozgan Province ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 29-40
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