|Published in||Indian Journal of Geo marine Sciences|
Department of Biological and Environmental Sciences
|Subject categories||Marine ecology, Biological Sciences|
Present study consists the relationship between phytoplankton community structure and physico-chemical parameters in Mahim Bay and Manori Creek. Altogether, 230 phytoplankton taxa comprising 131 diatoms, 82 dinoflagellates and 17 marine flagellates were recorded. Centric diatoms were the most common taxa, followed by thecatedinoflagellates. Seasonal blooms of diatoms and dinoflagellates occurred in the summer and at the end of the south-west monsoon. Additionally, we here report the f irst finding of two harmful dinoflagellate species, i.e. Pyrodinium bahamense and Dinophysis norvegica , in Indian coastal water. Dinophysis cf. norvegica was observed sporadically at Manori Creek. Except for PO 4 3 - , levels of major nutrients were low at both sites. Canonical correspondence analysis indicated that the relative abundance of some species was influenced by heav y metals and salinity. Dinophysis , Protoperidinium , Ceratium and Leptocylindrus were inversely correlated to salinity, whereas some of the marine flagellates (e.g., Chrysochromulia , Heterocapsa , Heterosigma and Fibrocapsa ) and dinoflagellates (e.g., Noctiluca and Amphidinium ) were seen alongside higher levels of heavy metals, such as Fe, Ni, Cu and Cd.