| Autor: |
Pravakar Mishra, Mehmuna Begum, Anitha Gera, B. Charan Kumar, Garlapati Deviram, Uma Kanta Pradhan, Athan Vashi, Debasmita Bandyopadhyay, Subrat Naik, Uma Sankar Panda, M.V. Ramana Murthy |
| Jazyk: |
angličtina |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
Oceanologia, Vol 64, Iss 4, Pp 781-788 (2022) |
| Druh dokumentu: |
article |
| ISSN: |
0078-3234 |
| DOI: |
10.1016/j.oceano.2022.06.005 |
| Popis: |
The paper discusses the factors associated with the sudden outbreak of the nocturnal heterotrophic bioluminescent dinoflagellate Noctiluca scintillans along the Chennai coast. The bloom occurred along a stretch of 16 km following a spell of heavy rain in August 2019. The density of N. scintillans varied from 1000 to 19000 cells/L, with a distinguished distribution pattern. High N. scintillans abundance was recorded at Panaiyurkuppam and Kovalam, with 19000 cells/L and 18000 cells/L, recorded respectively. Adequate nutrients brought by substantial rainfall and a high abundance of the diatom Thalassiosira sp. triggered the N. scintillans bloom. The low wind speed (5 m/sec), lowering of atmospheric temperature (from 24.00 to 31.00°C, 27.5 ± 1.17°C), high rainfall (6 mm within one day), and low sea surface temperature (SST) (from 25.20 to 31.00°C, 29.37± 1.17°C) are probable environmental cues. Local hydrodynamics and the diverging currents governed the presence and dispersion of the bloom in the region. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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