Buffer Capacity, Ecosystem Feedbacks, and Seawater Chemistry under Global Change
Ocean acidification (OA) results in reduced seawater pH and aragonite saturation state (Ωarag), but also reduced seawater buffer capacity. As buffer capacity decreases, diel variation in seawater chemistry increases. However, a variety of ecosystem feedbacks can modulate changes in both average seaw...
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ftdoajarticles:oai:doaj.org/article:7b4646c7880742e481faa6c45e0a7657 2023-05-15T17:50:35+02:00 Buffer Capacity, Ecosystem Feedbacks, and Seawater Chemistry under Global Change Robert J. Toonen Marlin J. Atkinson Florence I.M. Thomas Christopher P. Jury 2013-09-01T00:00:00Z https://doi.org/10.3390/w5031303 https://doaj.org/article/7b4646c7880742e481faa6c45e0a7657 EN eng MDPI AG http://www.mdpi.com/2073-4441/5/3/1303 https://doaj.org/toc/2073-4441 doi:10.3390/w5031303 2073-4441 https://doaj.org/article/7b4646c7880742e481faa6c45e0a7657 Water, Vol 5, Iss 3, Pp 1303-1325 (2013) ocean acidification climate change coral reef ecosystem modeling calcification aragonite saturation carbonate pH Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500 article 2013 ftdoajarticles https://doi.org/10.3390/w5031303 2022-12-31T14:26:03Z Ocean acidification (OA) results in reduced seawater pH and aragonite saturation state (Ωarag), but also reduced seawater buffer capacity. As buffer capacity decreases, diel variation in seawater chemistry increases. However, a variety of ecosystem feedbacks can modulate changes in both average seawater chemistry and diel seawater chemistry variation. Here we model these effects for a coastal, reef flat ecosystem. We show that an increase in offshore pCO2 and temperature (to 900 µatm and + 3 °C) can increase diel pH variation by as much as a factor of 2.5 and can increase diel pCO2 variation by a factor of 4.6, depending on ecosystem feedbacks and seawater residence time. Importantly, these effects are different between day and night. With increasing seawater residence time and increasing feedback intensity, daytime seawater chemistry becomes more similar to present-day conditions while nighttime seawater chemistry becomes less similar to present-day conditions. Recent studies suggest that carbonate chemistry variation itself, independent of the average chemistry conditions, can have important effects on marine organisms and ecosystem processes. Better constraining ecosystem feedbacks under global change will improve projections of coastal water chemistry, but this study shows the importance of considering changes in both average carbonate chemistry and diel chemistry variation for organisms and ecosystems. Article in Journal/Newspaper Ocean acidification Directory of Open Access Journals: DOAJ Articles Water 5 3 1303 1325 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
ocean acidification climate change coral reef ecosystem modeling calcification aragonite saturation carbonate pH Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500 |
spellingShingle |
ocean acidification climate change coral reef ecosystem modeling calcification aragonite saturation carbonate pH Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500 Robert J. Toonen Marlin J. Atkinson Florence I.M. Thomas Christopher P. Jury Buffer Capacity, Ecosystem Feedbacks, and Seawater Chemistry under Global Change |
topic_facet |
ocean acidification climate change coral reef ecosystem modeling calcification aragonite saturation carbonate pH Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500 |
description |
Ocean acidification (OA) results in reduced seawater pH and aragonite saturation state (Ωarag), but also reduced seawater buffer capacity. As buffer capacity decreases, diel variation in seawater chemistry increases. However, a variety of ecosystem feedbacks can modulate changes in both average seawater chemistry and diel seawater chemistry variation. Here we model these effects for a coastal, reef flat ecosystem. We show that an increase in offshore pCO2 and temperature (to 900 µatm and + 3 °C) can increase diel pH variation by as much as a factor of 2.5 and can increase diel pCO2 variation by a factor of 4.6, depending on ecosystem feedbacks and seawater residence time. Importantly, these effects are different between day and night. With increasing seawater residence time and increasing feedback intensity, daytime seawater chemistry becomes more similar to present-day conditions while nighttime seawater chemistry becomes less similar to present-day conditions. Recent studies suggest that carbonate chemistry variation itself, independent of the average chemistry conditions, can have important effects on marine organisms and ecosystem processes. Better constraining ecosystem feedbacks under global change will improve projections of coastal water chemistry, but this study shows the importance of considering changes in both average carbonate chemistry and diel chemistry variation for organisms and ecosystems. |
format |
Article in Journal/Newspaper |
author |
Robert J. Toonen Marlin J. Atkinson Florence I.M. Thomas Christopher P. Jury |
author_facet |
Robert J. Toonen Marlin J. Atkinson Florence I.M. Thomas Christopher P. Jury |
author_sort |
Robert J. Toonen |
title |
Buffer Capacity, Ecosystem Feedbacks, and Seawater Chemistry under Global Change |
title_short |
Buffer Capacity, Ecosystem Feedbacks, and Seawater Chemistry under Global Change |
title_full |
Buffer Capacity, Ecosystem Feedbacks, and Seawater Chemistry under Global Change |
title_fullStr |
Buffer Capacity, Ecosystem Feedbacks, and Seawater Chemistry under Global Change |
title_full_unstemmed |
Buffer Capacity, Ecosystem Feedbacks, and Seawater Chemistry under Global Change |
title_sort |
buffer capacity, ecosystem feedbacks, and seawater chemistry under global change |
publisher |
MDPI AG |
publishDate |
2013 |
url |
https://doi.org/10.3390/w5031303 https://doaj.org/article/7b4646c7880742e481faa6c45e0a7657 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
Water, Vol 5, Iss 3, Pp 1303-1325 (2013) |
op_relation |
http://www.mdpi.com/2073-4441/5/3/1303 https://doaj.org/toc/2073-4441 doi:10.3390/w5031303 2073-4441 https://doaj.org/article/7b4646c7880742e481faa6c45e0a7657 |
op_doi |
https://doi.org/10.3390/w5031303 |
container_title |
Water |
container_volume |
5 |
container_issue |
3 |
container_start_page |
1303 |
op_container_end_page |
1325 |
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1766157410448179200 |