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Communication

Decline in Phytoplankton Biomass along Indian Coastal Waters due to COVID-19 Lockdown

1
Department of Geography, University of Georgia, Athens, GA 30602, USA
2
Wetland Research and Training Centre, Chilika Development Authority, Balugaon 752030, India
3
Department of Earth and Atmospheric Sciences, National Institute of Technology, Rourkela 769008, India
4
School of Sustainability, Xavier University, Puri 752050, India
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School of Earth, Ocean and Climate Sciences, Indian Institute of Technology, Bhubaneswar 752050, India
*
Author to whom correspondence should be addressed.
Remote Sens. 2020, 12(16), 2584; https://0-doi-org.brum.beds.ac.uk/10.3390/rs12162584
Received: 1 June 2020 / Revised: 6 August 2020 / Accepted: 9 August 2020 / Published: 11 August 2020
(This article belongs to the Section Remote Sensing Letter)
The SARS-CoV-2 (or COVID-19) lockdown in India, which started at an early stage of its infection curve, has been one of the strictest in the world. Air quality has improved in all urban centers in India, a major emitter of greenhouse gases (GHG). This study is based on the hypothesis that an abrupt halt in all urban activities resulted in a massive decline in NO2 emissions and has also altered coastal nitrogen (N) inputs; in-turn, this affected the trophic status of coastal waters across the country. We present the first evidence of an overall decline in pre-monsoon chlorophyll-a, a proxy for phytoplankton biomass, in coastal waters off urban centers during the peak of the lockdown in April. The preliminary field data and indirect evidence suggests the reduction in coastal chlorophyll-a could be linked to a net decline in nutrient loading, particularly of bioavailable N through watershed fluxes and atmospheric deposition. The preliminary results stress the importance of a further understanding of the relationship between fluctuations in anthropogenic N, due to lockdown measures and coastal ecosystem responses, as countries open-up to a business-as-usual scenario. View Full-Text
Keywords: water quality; phytoplankton density; atmospheric deposition; greenhouse gas emission; bioavailable nitrogen; SARS-CoV-2 water quality; phytoplankton density; atmospheric deposition; greenhouse gas emission; bioavailable nitrogen; SARS-CoV-2
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MDPI and ACS Style

Mishra, D.R.; Kumar, A.; Muduli, P.R.; Equeenuddin, S.M.; Rastogi, G.; Acharyya, T.; Swain, D. Decline in Phytoplankton Biomass along Indian Coastal Waters due to COVID-19 Lockdown. Remote Sens. 2020, 12, 2584. https://0-doi-org.brum.beds.ac.uk/10.3390/rs12162584

AMA Style

Mishra DR, Kumar A, Muduli PR, Equeenuddin SM, Rastogi G, Acharyya T, Swain D. Decline in Phytoplankton Biomass along Indian Coastal Waters due to COVID-19 Lockdown. Remote Sensing. 2020; 12(16):2584. https://0-doi-org.brum.beds.ac.uk/10.3390/rs12162584

Chicago/Turabian Style

Mishra, Deepak R., Abhishek Kumar, Pradipta R. Muduli, Sk. M. Equeenuddin, Gurdeep Rastogi, Tamoghna Acharyya, and Debadatta Swain. 2020. "Decline in Phytoplankton Biomass along Indian Coastal Waters due to COVID-19 Lockdown" Remote Sensing 12, no. 16: 2584. https://0-doi-org.brum.beds.ac.uk/10.3390/rs12162584

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