Shifts in coralline algae, macroalgae, and coral juveniles in the Great Barrier Reef associated with present‐day ocean acidification
Abstract Seawater acidification from increasing CO 2 is often enhanced in coastal waters due to elevated nutrients and sedimentation. Our understanding of the effects of ocean and coastal acidification on present‐day ecosystems is limited. Here we use data from three independent large‐scale reef mon...
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crwiley:10.1111/gcb.14985 2024-09-15T18:27:50+00:00 Shifts in coralline algae, macroalgae, and coral juveniles in the Great Barrier Reef associated with present‐day ocean acidification Smith, Joy N. Mongin, Mathieu Thompson, Angus Jonker, Michelle J. De'ath, Glenn Fabricius, Katharina E. Australian Institute of Marine Science 2020 http://dx.doi.org/10.1111/gcb.14985 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fgcb.14985 https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.14985 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/gcb.14985 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Global Change Biology volume 26, issue 4, page 2149-2160 ISSN 1354-1013 1365-2486 journal-article 2020 crwiley https://doi.org/10.1111/gcb.14985 2024-08-22T04:16:09Z Abstract Seawater acidification from increasing CO 2 is often enhanced in coastal waters due to elevated nutrients and sedimentation. Our understanding of the effects of ocean and coastal acidification on present‐day ecosystems is limited. Here we use data from three independent large‐scale reef monitoring programs to assess coral reef responses associated with changes in mean aragonite saturation state (Ω ar ) in the Great Barrier Reef World Heritage Area (GBR). Spatial declines in mean Ω ar are associated with monotonic declines in crustose coralline algae (up to 3.1‐fold) and coral juvenile densities (1.3‐fold), while non‐calcifying macroalgae greatly increase (up to 3.2‐fold), additionally to their natural changes across and along the GBR. These three key groups of organisms are important proxies for coral reef health. Our data suggest a tipping point at Ω ar 3.5–3.6 for these coral reef health indicators. Suspended sediments acted as an additive stressor. The latter suggests that effective water quality management to reduce suspended sediments might locally and temporarily reduce the pressure from ocean acidification on these organisms. Article in Journal/Newspaper Ocean acidification Wiley Online Library Global Change Biology 26 4 2149 2160 |
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Wiley Online Library |
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crwiley |
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English |
description |
Abstract Seawater acidification from increasing CO 2 is often enhanced in coastal waters due to elevated nutrients and sedimentation. Our understanding of the effects of ocean and coastal acidification on present‐day ecosystems is limited. Here we use data from three independent large‐scale reef monitoring programs to assess coral reef responses associated with changes in mean aragonite saturation state (Ω ar ) in the Great Barrier Reef World Heritage Area (GBR). Spatial declines in mean Ω ar are associated with monotonic declines in crustose coralline algae (up to 3.1‐fold) and coral juvenile densities (1.3‐fold), while non‐calcifying macroalgae greatly increase (up to 3.2‐fold), additionally to their natural changes across and along the GBR. These three key groups of organisms are important proxies for coral reef health. Our data suggest a tipping point at Ω ar 3.5–3.6 for these coral reef health indicators. Suspended sediments acted as an additive stressor. The latter suggests that effective water quality management to reduce suspended sediments might locally and temporarily reduce the pressure from ocean acidification on these organisms. |
author2 |
Australian Institute of Marine Science |
format |
Article in Journal/Newspaper |
author |
Smith, Joy N. Mongin, Mathieu Thompson, Angus Jonker, Michelle J. De'ath, Glenn Fabricius, Katharina E. |
spellingShingle |
Smith, Joy N. Mongin, Mathieu Thompson, Angus Jonker, Michelle J. De'ath, Glenn Fabricius, Katharina E. Shifts in coralline algae, macroalgae, and coral juveniles in the Great Barrier Reef associated with present‐day ocean acidification |
author_facet |
Smith, Joy N. Mongin, Mathieu Thompson, Angus Jonker, Michelle J. De'ath, Glenn Fabricius, Katharina E. |
author_sort |
Smith, Joy N. |
title |
Shifts in coralline algae, macroalgae, and coral juveniles in the Great Barrier Reef associated with present‐day ocean acidification |
title_short |
Shifts in coralline algae, macroalgae, and coral juveniles in the Great Barrier Reef associated with present‐day ocean acidification |
title_full |
Shifts in coralline algae, macroalgae, and coral juveniles in the Great Barrier Reef associated with present‐day ocean acidification |
title_fullStr |
Shifts in coralline algae, macroalgae, and coral juveniles in the Great Barrier Reef associated with present‐day ocean acidification |
title_full_unstemmed |
Shifts in coralline algae, macroalgae, and coral juveniles in the Great Barrier Reef associated with present‐day ocean acidification |
title_sort |
shifts in coralline algae, macroalgae, and coral juveniles in the great barrier reef associated with present‐day ocean acidification |
publisher |
Wiley |
publishDate |
2020 |
url |
http://dx.doi.org/10.1111/gcb.14985 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fgcb.14985 https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.14985 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/gcb.14985 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
Global Change Biology volume 26, issue 4, page 2149-2160 ISSN 1354-1013 1365-2486 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/gcb.14985 |
container_title |
Global Change Biology |
container_volume |
26 |
container_issue |
4 |
container_start_page |
2149 |
op_container_end_page |
2160 |
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1810469113029459968 |