Abstract
Variations in the physico-chemical properties of coastal waters through monsoon seasons play a major role in determining the density, diversity and occurrence of phytoplankton in a monsoonal region. This study was conducted to assess the temporal variation of phytoplankton assemblage in Oman Sea which in turn can serve as an ecological health indicator in this region. The results showed variation in physico-chemical parameters, phytoplankton density and diversity during monsoon seasons. The major contributor genera among seasons were Cochlodinium, Phormidium, Gymnodinium, Protoperidinium, Lauderia, Noctiluca, Navicula and Oscillatoria. Canonical Correspondence Analysis (CCA) between environmental variables and the dominant genera of phytoplankton indicated that factors such as dissolved oxygen, temperature, pH, silicate, phosphate and nitrate, played a significant role in the distribution of species in monsoon seasons.
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