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Epiphytic phytoplankton in response to divergent air pollutants from urban and commercial zones of Chennai District, Tamil Nadu, India: A case study towards phytoplankton based Air Quality Index

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Abstract

Microalgae are an effective source of bioindicators to screen any changes of the natural ecosystem in the environment. With the increase in air pollution due to different potential sources, pollution monitoring stations are deployed across the nation with sophisticated analytical methodologies. However, phytoplankton can also serve as an indicator of air pollution as they possess the ability to absorb particulate contaminants. With previous studies on indicator species based on aquatic habitats, this study was carried out to comprehend the interaction between gaseous oxides of sulphur and nitrogen, particulate matter with diameter less than 10 and 2.5 μm (PM10, PM 2.5), with the population density, abundance and frequency of terrestrial epiphytic microalgae from residential and commercial areas of Chennai District, Tamil Nadu. There was a significant correlation between the members of Chlorophyceae, Bacillariophyceae and Cyanophyceae with the abovementioned air pollutants. Cluster analysis, CCA and NMDS analysis were done to find the interaction pattern. The results suggested few indicator species from genera Chlorella, Phormidium, Nitzschia, Navicula, Spirogyra and Oscillatoria. Species of Desmodesmus, Gleocapsa, Gleocyctis and Lyngbya can be considered as an addition to Palmer’s list of tolerant species. During this study, the occurrence of filamentous Cladophora crispata is reported for the first time from Tamil Nadu, India. This study unveiled the list of microalgal species resistant to air pollutants from one of the highly polluted cities of India.

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All data generated or analysed during this study are included in this published article (and its supplementary information files).

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Acknowledgements

The authors thank the Ministry of Environment, Forests and Climate change, Govt. of India for financial assistance through the All India Coordinated Project on Taxonomy (AICOPTAX) of freshwater planktonic algae, No. J. 22018/20/2016-CSC (TAX). The authors would like to thank the Tamil Nadu Pollution Control Board for their support on data collection. We thank The Director, Centre for Advanced Studies in Botany, University of Madras, for providing laboratory facilities.

Funding

Ministry of Environment, Forests and Climate Change, Govt. of India for financial assistance through the All India Coordinated Project on Taxonomy (AICOPTAX) of freshwater planktonic algae, No. J. 22018/20/2016-CSC (TAX).

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N.S. contributed towards the experimental planning, taxonomical identification and execution of this research work. S.J.P.J. contributed towards field experiments and data collection. S.K.G. contributed towards the statistical analysis and manuscript correction. G.G. and S.K.B. contributed towards the collection of microalgal samples, enumeration and cultivation.

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Correspondence to Nagaraj Subramani.

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Joseph, S.J.P., Gopidas, S.K., Gnanam, G. et al. Epiphytic phytoplankton in response to divergent air pollutants from urban and commercial zones of Chennai District, Tamil Nadu, India: A case study towards phytoplankton based Air Quality Index. Environ Sci Pollut Res 29, 15098–15116 (2022). https://doi.org/10.1007/s11356-021-16815-w

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  • DOI: https://doi.org/10.1007/s11356-021-16815-w

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