Anthropogenic nutrient loads and season variability drive high atmospheric N2O fluxes in a fragmented mangrove system

Abstract Fragmented mangroves are generally ignored in N2O flux studies. Here we report observations over the course of a year from the Mangalavanam coastal wetland in Southern India. The wetland is a fragmented mangrove stand close to a large urban centre with high anthropogenic nitrogen inputs. Th...

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Auteurs principaux:	N. Regina Hershey, S. Bijoy Nandan, K. Neelima Vasu, Douglas R. Tait
Format:	article
Langue:	EN
Publié:	Nature Portfolio 2021
Sujets:	Medicine R Science Q
Accès en ligne:	https://doaj.org/article/3453e712874c4305b4f7e426145b5b23
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spelling	oai:doaj.org-article:3453e712874c4305b4f7e426145b5b232021-12-02T16:36:05ZAnthropogenic nutrient loads and season variability drive high atmospheric N2O fluxes in a fragmented mangrove system10.1038/s41598-021-85847-62045-2322https://doaj.org/article/3453e712874c4305b4f7e426145b5b232021-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-85847-6https://doaj.org/toc/2045-2322Abstract Fragmented mangroves are generally ignored in N2O flux studies. Here we report observations over the course of a year from the Mangalavanam coastal wetland in Southern India. The wetland is a fragmented mangrove stand close to a large urban centre with high anthropogenic nitrogen inputs. The study found the wetland was a net source of N2O to the atmosphere with fluxes ranging between 17.5 to 117.9 µmol m−2 day−1 which equated to high N2O saturations of between 697 and 1794%. The average dissolved inorganic nitrogen inputs (80.1 ± 18.1 µmol L−1) and N2O emissions (59.2 ± 30.0 µmol m−2 day−1) were highest during the monsoon season when the rainfall and associated river water inputs and terrestrial runoff were highest. The variation in N2O dynamics was shown to be driven by the changes in rainfall, water column depth, salinity, dissolved oxygen, carbon, and substrate nitrogen. The study suggests that fragmented/minor mangrove ecosystems subject to high human nutrient inputs may be a significant component of the global N2O budget.N. Regina HersheyS. Bijoy NandanK. Neelima VasuDouglas R. TaitNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q N. Regina Hershey S. Bijoy Nandan K. Neelima Vasu Douglas R. Tait Anthropogenic nutrient loads and season variability drive high atmospheric N2O fluxes in a fragmented mangrove system
description	Abstract Fragmented mangroves are generally ignored in N2O flux studies. Here we report observations over the course of a year from the Mangalavanam coastal wetland in Southern India. The wetland is a fragmented mangrove stand close to a large urban centre with high anthropogenic nitrogen inputs. The study found the wetland was a net source of N2O to the atmosphere with fluxes ranging between 17.5 to 117.9 µmol m−2 day−1 which equated to high N2O saturations of between 697 and 1794%. The average dissolved inorganic nitrogen inputs (80.1 ± 18.1 µmol L−1) and N2O emissions (59.2 ± 30.0 µmol m−2 day−1) were highest during the monsoon season when the rainfall and associated river water inputs and terrestrial runoff were highest. The variation in N2O dynamics was shown to be driven by the changes in rainfall, water column depth, salinity, dissolved oxygen, carbon, and substrate nitrogen. The study suggests that fragmented/minor mangrove ecosystems subject to high human nutrient inputs may be a significant component of the global N2O budget.
format	article
author	N. Regina Hershey S. Bijoy Nandan K. Neelima Vasu Douglas R. Tait
author_facet	N. Regina Hershey S. Bijoy Nandan K. Neelima Vasu Douglas R. Tait
author_sort	N. Regina Hershey
title	Anthropogenic nutrient loads and season variability drive high atmospheric N2O fluxes in a fragmented mangrove system
title_short	Anthropogenic nutrient loads and season variability drive high atmospheric N2O fluxes in a fragmented mangrove system
title_full	Anthropogenic nutrient loads and season variability drive high atmospheric N2O fluxes in a fragmented mangrove system
title_fullStr	Anthropogenic nutrient loads and season variability drive high atmospheric N2O fluxes in a fragmented mangrove system
title_full_unstemmed	Anthropogenic nutrient loads and season variability drive high atmospheric N2O fluxes in a fragmented mangrove system
title_sort	anthropogenic nutrient loads and season variability drive high atmospheric n2o fluxes in a fragmented mangrove system
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/3453e712874c4305b4f7e426145b5b23
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_version_	1718383624405909504

Anthropogenic nutrient loads and season variability drive high atmospheric N2O fluxes in a fragmented mangrove system

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