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The relationship between variation of phytoplankton species composition and physico-chemical parameters in northern coastal waters of Mumbai, India.

Journal article
Authors N Shahi
Anna Godhe
S.K. Mallik
Karolina Härnström
B.B. Nayak
Published in Indian Journal of Geo marine Sciences
Volume 44
Issue 5
Pages 673-684
ISSN 0379-5136
Publication year 2015
Published at Department of Biological and Environmental Sciences
Pages 673-684
Language en
Links hdl.handle.net/123456789/34792
Keywords Phytoplankton;Nutrients;Heavy metals;Eutrophication;Pollution
Subject categories Marine ecology, Biological Sciences

Abstract

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.

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