Alkalinity cycling and carbonate chemistry decoupling in seagrass mystify processes of acidification mitigation

Abstract The adverse conditions of acidification on sensitive marine organisms have led to the investigation of bioremediation methods as a way to abate local acidification. This phytoremediation, by macrophytes, is expected to reduce the severity of acidification in nearshore habitats on short time...

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Autores principales:	Cale A. Miller, Amanda L. Kelley
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/5900a9c86a854366908de33b2aeaf82d
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spelling	oai:doaj.org-article:5900a9c86a854366908de33b2aeaf82d2021-12-02T16:10:37ZAlkalinity cycling and carbonate chemistry decoupling in seagrass mystify processes of acidification mitigation10.1038/s41598-021-92771-22045-2322https://doaj.org/article/5900a9c86a854366908de33b2aeaf82d2021-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-92771-2https://doaj.org/toc/2045-2322Abstract The adverse conditions of acidification on sensitive marine organisms have led to the investigation of bioremediation methods as a way to abate local acidification. This phytoremediation, by macrophytes, is expected to reduce the severity of acidification in nearshore habitats on short timescales. Characterizing the efficacy of phytoremediation can be challenging as residence time, tidal mixing, freshwater input, and a limited capacity to fully constrain the carbonate system can lead to erroneous conclusions. Here, we present in situ observations of carbonate chemistry relationships to seagrass habitats by comparing dense (DG), patchy (PG), and no grass (NG) Zostera marina pools in the high intertidal experiencing intermittent flooding. High-frequency measurements of pH, alkalinity (TA), and total-CO2 elucidate extreme diel cyclicity in all parameters. The DG pool displayed frequent decoupling between pH and aragonite saturation state (Ωarg) suggesting pH-based inferences of acidification remediation by seagrass can be misinterpreted as pH and Ωarg can be independent stressors for some bivalves. Estimates show the DG pool had an integrated ΔTA of 550 μmol kg−1 over a 12 h period, which is ~ 60% > the PG and NG pools. We conclude habitats with mixed photosynthesizers (i.e., PG pool) result in less decoupling between pH and Ωarg.Cale A. MillerAmanda L. KelleyNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Cale A. Miller Amanda L. Kelley Alkalinity cycling and carbonate chemistry decoupling in seagrass mystify processes of acidification mitigation
description	Abstract The adverse conditions of acidification on sensitive marine organisms have led to the investigation of bioremediation methods as a way to abate local acidification. This phytoremediation, by macrophytes, is expected to reduce the severity of acidification in nearshore habitats on short timescales. Characterizing the efficacy of phytoremediation can be challenging as residence time, tidal mixing, freshwater input, and a limited capacity to fully constrain the carbonate system can lead to erroneous conclusions. Here, we present in situ observations of carbonate chemistry relationships to seagrass habitats by comparing dense (DG), patchy (PG), and no grass (NG) Zostera marina pools in the high intertidal experiencing intermittent flooding. High-frequency measurements of pH, alkalinity (TA), and total-CO2 elucidate extreme diel cyclicity in all parameters. The DG pool displayed frequent decoupling between pH and aragonite saturation state (Ωarg) suggesting pH-based inferences of acidification remediation by seagrass can be misinterpreted as pH and Ωarg can be independent stressors for some bivalves. Estimates show the DG pool had an integrated ΔTA of 550 μmol kg−1 over a 12 h period, which is ~ 60% > the PG and NG pools. We conclude habitats with mixed photosynthesizers (i.e., PG pool) result in less decoupling between pH and Ωarg.
format	article
author	Cale A. Miller Amanda L. Kelley
author_facet	Cale A. Miller Amanda L. Kelley
author_sort	Cale A. Miller
title	Alkalinity cycling and carbonate chemistry decoupling in seagrass mystify processes of acidification mitigation
title_short	Alkalinity cycling and carbonate chemistry decoupling in seagrass mystify processes of acidification mitigation
title_full	Alkalinity cycling and carbonate chemistry decoupling in seagrass mystify processes of acidification mitigation
title_fullStr	Alkalinity cycling and carbonate chemistry decoupling in seagrass mystify processes of acidification mitigation
title_full_unstemmed	Alkalinity cycling and carbonate chemistry decoupling in seagrass mystify processes of acidification mitigation
title_sort	alkalinity cycling and carbonate chemistry decoupling in seagrass mystify processes of acidification mitigation
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/5900a9c86a854366908de33b2aeaf82d
work_keys_str_mv	AT caleamiller alkalinitycyclingandcarbonatechemistrydecouplinginseagrassmystifyprocessesofacidificationmitigation AT amandalkelley alkalinitycyclingandcarbonatechemistrydecouplinginseagrassmystifyprocessesofacidificationmitigation
_version_	1718384410972127232

Alkalinity cycling and carbonate chemistry decoupling in seagrass mystify processes of acidification mitigation

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