Phytoplankton dynamics in relation to Red tide appearance in Qarun Lake, Egypt
Qarun Lake is a unique saline basin. Its phytoplankton species abundance and dynamics in relation to the Red Tide phenomenon is the focus of this study. Samples were collected from May 2015 to April 2016 in twelve successive cruises. Phytoplankton productivity attained the highest level on July with...
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| Format: | Article |
| Language: | English |
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Elsevier
2021-09-01
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| Series: | Egyptian Journal of Aquatic Research |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1687428521000534 |
| _version_ | 1818619560705654784 |
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| author | Ezzat A. Ibrahim Shymaa S. Zaher Wael M. Ibrahim Yassmeen A. Mosad |
| author_facet | Ezzat A. Ibrahim Shymaa S. Zaher Wael M. Ibrahim Yassmeen A. Mosad |
| author_sort | Ezzat A. Ibrahim |
| collection | DOAJ |
| description | Qarun Lake is a unique saline basin. Its phytoplankton species abundance and dynamics in relation to the Red Tide phenomenon is the focus of this study. Samples were collected from May 2015 to April 2016 in twelve successive cruises. Phytoplankton productivity attained the highest level on July with the bloom of Dinophyceae, while showing negative correlation with water transparency (r = −0.72) and positive correlation with DO (r = 0.84). The causative species was Gymnodinium lantzschii. Another incident of Dinophyceae bloom was observed in March when chlorophyll a recorded 158.4 mgm−3, chl. b was (92.7 mgm−3 and chl. c was 160 mgm−3. The causative species were Prorocentrum aporum and Prorocentrum micans and the lake’s water turned to red color; the “Red Tide phenomenon”. Chlorella vulgaris bloom was recorded for the first time in the lake on August at site (4) with green water discoloration. The water temperature of the lake was one of the main phytoplankton bloom’s drivers as the dominant species grew and flourished within a narrow range of temperature (30.4–34.9 °C). The results showed that there were strong correlations between carbonate, bicarbonate, DO and nutrients indicating that the dinoflagellate bloom was due to the high eutrophication of the lake. Finally, the Red tide phenomenon may influence the lake fisheries causing significant economic loss. |
| first_indexed | 2024-12-16T17:39:26Z |
| format | Article |
| id | doaj.art-b43e9fe413434a36b57b6d48a63c73b4 |
| institution | Directory Open Access Journal |
| issn | 1687-4285 |
| language | English |
| last_indexed | 2024-12-16T17:39:26Z |
| publishDate | 2021-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Egyptian Journal of Aquatic Research |
| spelling | doaj.art-b43e9fe413434a36b57b6d48a63c73b42022-12-21T22:22:39ZengElsevierEgyptian Journal of Aquatic Research1687-42852021-09-01473293300Phytoplankton dynamics in relation to Red tide appearance in Qarun Lake, EgyptEzzat A. Ibrahim0Shymaa S. Zaher1Wael M. Ibrahim2Yassmeen A. Mosad3National Institute of Oceanography and Fisheries (NIOF), EgyptNational Institute of Oceanography and Fisheries (NIOF), Egypt; Corresponding author.Faculty of Science, Botany Department, Damanhour University, EgyptFaculty of Science, Botany Department, Fayoum University, EgyptQarun Lake is a unique saline basin. Its phytoplankton species abundance and dynamics in relation to the Red Tide phenomenon is the focus of this study. Samples were collected from May 2015 to April 2016 in twelve successive cruises. Phytoplankton productivity attained the highest level on July with the bloom of Dinophyceae, while showing negative correlation with water transparency (r = −0.72) and positive correlation with DO (r = 0.84). The causative species was Gymnodinium lantzschii. Another incident of Dinophyceae bloom was observed in March when chlorophyll a recorded 158.4 mgm−3, chl. b was (92.7 mgm−3 and chl. c was 160 mgm−3. The causative species were Prorocentrum aporum and Prorocentrum micans and the lake’s water turned to red color; the “Red Tide phenomenon”. Chlorella vulgaris bloom was recorded for the first time in the lake on August at site (4) with green water discoloration. The water temperature of the lake was one of the main phytoplankton bloom’s drivers as the dominant species grew and flourished within a narrow range of temperature (30.4–34.9 °C). The results showed that there were strong correlations between carbonate, bicarbonate, DO and nutrients indicating that the dinoflagellate bloom was due to the high eutrophication of the lake. Finally, the Red tide phenomenon may influence the lake fisheries causing significant economic loss.http://www.sciencedirect.com/science/article/pii/S1687428521000534ChlorophyllDinophyceaeRed TideBloomEutrophicationProductivity |
| spellingShingle | Ezzat A. Ibrahim Shymaa S. Zaher Wael M. Ibrahim Yassmeen A. Mosad Phytoplankton dynamics in relation to Red tide appearance in Qarun Lake, Egypt Egyptian Journal of Aquatic Research Chlorophyll Dinophyceae Red Tide Bloom Eutrophication Productivity |
| title | Phytoplankton dynamics in relation to Red tide appearance in Qarun Lake, Egypt |
| title_full | Phytoplankton dynamics in relation to Red tide appearance in Qarun Lake, Egypt |
| title_fullStr | Phytoplankton dynamics in relation to Red tide appearance in Qarun Lake, Egypt |
| title_full_unstemmed | Phytoplankton dynamics in relation to Red tide appearance in Qarun Lake, Egypt |
| title_short | Phytoplankton dynamics in relation to Red tide appearance in Qarun Lake, Egypt |
| title_sort | phytoplankton dynamics in relation to red tide appearance in qarun lake egypt |
| topic | Chlorophyll Dinophyceae Red Tide Bloom Eutrophication Productivity |
| url | http://www.sciencedirect.com/science/article/pii/S1687428521000534 |
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