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Sultan Qaboos University (2019)

The effect of environmental factors on harmful algal blooms at Majis Desalination Plant, Sohar Industrial area, Sea of Oman

Al-Kharusiyah, Ahlam Sulieman Hamood

Titre : The effect of environmental factors on harmful algal blooms at Majis Desalination Plant, Sohar Industrial area, Sea of Oman

Auteur : Al-Kharusiyah, Ahlam Sulieman Hamood

Université de soutenance : Sultan Qaboos University

Grade : Master of Science (MS) in Marine Sciences and Fisheries 2019

Résumé partiel
Arid countries around the world, particularly in the middle East and North Africa (MENA) region rely heavily on seawater desalination process to produce fresh water. The rapid increase in the construction of reverse osmosis (SWRO) desalination plants near coastal areas, has been accompanied with the expansion of Harmful Algal Blooms (HABs). Problems associated with HABs had created continuous challenges to SWRO desalination plants. In this study, the influence of the physical-chemical and biological factors on phytoplankton community structure and on HABs forming algae was investigated in the Northwest of the Sea of Oman near Majis desalination plant (Sohar Industrial Port, SIP) from April, 2018 to March, 2019. This is the first study carried out in the coastal waters of Oman aimed to examine the presence of HABs forming algae and their cysts near the desalination plant located in industrial area. 144 seawater samples were collected in a weekly basis at three stations (Out, Intake, and Outfall) from one sampling point per station. A total of 64 phytoplankton taxa were recorded during this study, in which each station exhibited different phytoplankton composition in terms of presence and abundance of taxa through the study period. Bacillariophyceae (Diatoms) were the dominant phytoplankton groups at all stations and contributed with the highest number of taxa. Station "Out" was reported the highest number of diatom species (42 species), while "Outfall" station was reported the lowest number of diatom species (28 species). The second most abundant phytoplankton group was Dinophyceae (Dinoflagellates), in which the highest number of species were reported at station "Out" (21 species), while the lowest number of species were reported at station "Outfall" (11 species). Only one cyanobacterium species "Trichodesmium erythraeum" was found

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