alexa Heavy Metals Pollution Influence the Community Structure of Cyanobacteria in Nutrient Rich Tropical Estuary
ISSN: 2572-3103

Journal of Oceanography and Marine Research
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Research Article

Heavy Metals Pollution Influence the Community Structure of Cyanobacteria in Nutrient Rich Tropical Estuary

Abdulaziz Anas1*, Jasmin C1, Sheeba VA1, Gireeshkumar TR1 and Shanta Nair2
1CSIR-National Institute of Oceanography, Regional Centre, Kochi 682 018, Kerala, India
2CSIR-National Institute of Oceanography, Dona Paula, Goa, India
Corresponding Author : Abdulaziz Anas
CSIR-National Institute of Oceanography
Regional Centre, Kochi 682018, Kerala, India
Tel: 91-482- 2390814
E-mail: [email protected]
Received September 18, 2015; Accepted November 12, 2015; Published November 16, 2015
Citation: Anas A, Jasmin C, Sheeba VA, Gireeshkumar TR, Nair S (2015) Heavy Metals Pollution Influence the Community Structure of Cyanobacteria in Nutrient Rich Tropical Estuary. Oceanography 3:137. doi:10.4172/2332-2632.1000137
Copyright: © 2015 Anas A, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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Abstract

Anthropogenic inputs influence the community structure and activities of microorganisms, which may impinge the functioning of estuarine and coastal ecosystem. The aim of the present study was to understand the influence of dissolved heavy metals (Cr, Mn, Fe, Ni, Cu and Zn) on community structure of cyanobacteria in a nutrient rich tropical estuary, Cochin Estuary (CE), across the southwest coast of India. Dissolved heavy metals were higher in CE during dry season, with Zn as major pollutant. The level of dissolved Zn was higher in stations near river head during dry (130 μg L-1) and wet seasons (105 μg L-1). The community structure of cyanobacteria was higher in CE during wet season (H’ index: 1.4 to 3.1) compared to that in dry season (H’ index: 1.1 to 2.2). The 16S rRNA gene sequence analysis showed the prevalence of Synechococcus sp in CE. PCA analysis indicated the positive influence of Zn and nutrients on community structure of cyanobacteria. We postulate that the Zn pollution may be a critical factor to be monitored and controlled in nutrient rich estuaries, otherwise it may accelerate the eutrophication and associated ecological constraints.

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