Acidification impacts and acclimation potential of foraminifera
Ocean acidification is expected to negatively affect many ecologically important organisms. Here we explored the response of Caribbean benthic foraminiferal communities to naturally discharging low-pH waters similar to expected future projections for the end of the 21 st century. At low-pH (~ 7.7 pH...
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ftcopernicus:oai:publications.copernicus.org:bgd102377 2023-05-15T17:51:15+02:00 Acidification impacts and acclimation potential of foraminifera François, Daniel Paytan, Adina Araújo, Olga Maria Oliveira Lopes, Ricardo Tadeu Barbosa, Cátia Fernandes 2022-04-13 application/pdf https://doi.org/10.5194/bg-2022-91 https://bg.copernicus.org/preprints/bg-2022-91/ eng eng doi:10.5194/bg-2022-91 https://bg.copernicus.org/preprints/bg-2022-91/ eISSN: 1726-4189 Text 2022 ftcopernicus https://doi.org/10.5194/bg-2022-91 2022-04-18T16:21:49Z Ocean acidification is expected to negatively affect many ecologically important organisms. Here we explored the response of Caribbean benthic foraminiferal communities to naturally discharging low-pH waters similar to expected future projections for the end of the 21 st century. At low-pH (~ 7.7 pH units), low calcite saturation, agglutinated and symbiont-bearing species were relatively more abundant, indicating higher resistance to potential carbonate chemistry changes. Diversity and other taxonomical metrics declined steeply with decreasing pH despite exposure of this ecosystem for millennia to low pH conditions, suggesting that tropical foraminifera communities will be negatively impacted under acidification scenarios SSP3-7.0 and SSP5-8.5. The species Archaias angulatus , a major contributor to sediment production in the Caribbean was able to calcify at conditions more extreme than those projected for the late 21 st century (7.1 pH units), but the calcified tests were of lower density than those exposed to high-pH ambient conditions (7.96 pH units), indicating that reef foraminiferal carbonate budget might decrease. Smaller foraminifera were highly sensitive to decreasing pH and our results demonstrate their potential as indicators to monitor increasing OA conditions. Text Ocean acidification Copernicus Publications: E-Journals |
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Copernicus Publications: E-Journals |
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English |
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Ocean acidification is expected to negatively affect many ecologically important organisms. Here we explored the response of Caribbean benthic foraminiferal communities to naturally discharging low-pH waters similar to expected future projections for the end of the 21 st century. At low-pH (~ 7.7 pH units), low calcite saturation, agglutinated and symbiont-bearing species were relatively more abundant, indicating higher resistance to potential carbonate chemistry changes. Diversity and other taxonomical metrics declined steeply with decreasing pH despite exposure of this ecosystem for millennia to low pH conditions, suggesting that tropical foraminifera communities will be negatively impacted under acidification scenarios SSP3-7.0 and SSP5-8.5. The species Archaias angulatus , a major contributor to sediment production in the Caribbean was able to calcify at conditions more extreme than those projected for the late 21 st century (7.1 pH units), but the calcified tests were of lower density than those exposed to high-pH ambient conditions (7.96 pH units), indicating that reef foraminiferal carbonate budget might decrease. Smaller foraminifera were highly sensitive to decreasing pH and our results demonstrate their potential as indicators to monitor increasing OA conditions. |
format |
Text |
author |
François, Daniel Paytan, Adina Araújo, Olga Maria Oliveira Lopes, Ricardo Tadeu Barbosa, Cátia Fernandes |
spellingShingle |
François, Daniel Paytan, Adina Araújo, Olga Maria Oliveira Lopes, Ricardo Tadeu Barbosa, Cátia Fernandes Acidification impacts and acclimation potential of foraminifera |
author_facet |
François, Daniel Paytan, Adina Araújo, Olga Maria Oliveira Lopes, Ricardo Tadeu Barbosa, Cátia Fernandes |
author_sort |
François, Daniel |
title |
Acidification impacts and acclimation potential of foraminifera |
title_short |
Acidification impacts and acclimation potential of foraminifera |
title_full |
Acidification impacts and acclimation potential of foraminifera |
title_fullStr |
Acidification impacts and acclimation potential of foraminifera |
title_full_unstemmed |
Acidification impacts and acclimation potential of foraminifera |
title_sort |
acidification impacts and acclimation potential of foraminifera |
publishDate |
2022 |
url |
https://doi.org/10.5194/bg-2022-91 https://bg.copernicus.org/preprints/bg-2022-91/ |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
eISSN: 1726-4189 |
op_relation |
doi:10.5194/bg-2022-91 https://bg.copernicus.org/preprints/bg-2022-91/ |
op_doi |
https://doi.org/10.5194/bg-2022-91 |
_version_ |
1766158351290335232 |