Could the acid–base status of Antarctic sea urchins indicate a better-than-expected resilience to near-future ocean acidification?
Increasing atmospheric carbon dioxide concentration alters the chemistry of the oceans towards more acidic conditions. Polar oceans are particularly affected due to their low temperature, low carbonate content and mixing patterns, for instance upwellings. Calcifying organisms are expected to be high...
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ftunivbruxelles:oai:dipot.ulb.ac.be:2013/176478 2023-05-15T13:46:28+02:00 Could the acid–base status of Antarctic sea urchins indicate a better-than-expected resilience to near-future ocean acidification? Collard, Marie De Ridder, Chantal David, Bruno Dehairs, Frank Dubois, Philippe 2015 1 full-text file(s): application/pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/176478 https://dipot.ulb.ac.be/dspace/bitstream/2013/176478/3/176478.pdf en eng uri/info:doi/10.1111/gcb.12735 uri/info:scp/84923254387 https://dipot.ulb.ac.be/dspace/bitstream/2013/176478/3/176478.pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/176478 1 full-text file(s): info:eu-repo/semantics/restrictedAccess Global change biology, 21 Sciences exactes et naturelles Biologie des milieux particuliers Acid-base regulation Antarctica Echinoderms Ocean acidification Sea urchins Southern Ocean info:eu-repo/semantics/article info:ulb-repo/semantics/articlePeerReview info:ulb-repo/semantics/openurl/article 2015 ftunivbruxelles 2022-06-12T21:02:55Z Increasing atmospheric carbon dioxide concentration alters the chemistry of the oceans towards more acidic conditions. Polar oceans are particularly affected due to their low temperature, low carbonate content and mixing patterns, for instance upwellings. Calcifying organisms are expected to be highly impacted by the decrease in the oceans' pH and carbonate ions concentration. In particular, sea urchins, members of the phylum Echinodermata, are hypothesized to be at risk due to their high-magnesium calcite skeleton. However, tolerance to ocean acidification in metazoans is first linked to acid–base regulation capacities of the extracellular fluids. No information on this is available to date for Antarctic echinoderms and inference from temperate and tropical studies needs support. In this study, we investigated the acid–base status of 9 species of sea urchins (3 cidaroids, 2 regular euechinoids and 4 irregular echinoids). It appears that Antarctic regular euechinoids seem equipped with similar acid–base regulation systems as tropical and temperate regular euechinoids but could rely on more passive ion transfer systems, minimizing energy requirements. Cidaroids have an acid–base status similar to that of tropical cidaroids. Therefore Antarctic cidaroids will most probably not be affected by decreasing seawater pH, the pH drop linked to ocean acidification being negligible in comparison of the naturally low pH of the coelomic fluid. Irregular echinoids might not suffer from reduced seawater pH if acidosis of the coelomic fluid pH does not occur but more data on their acid–base regulation are needed. Combining these results with the resilience of Antarctic sea urchin larvae strongly suggests that these organisms might not be the expected victims of ocean acidification. However, data on the impact of other global stressors such as temperature and of the combination of the different stressors needs to be acquired to assess the sensitivity of these organisms to global change. SCOPUS: ar.j FLWIN ... Article in Journal/Newspaper Antarc* Antarctic Antarctica Ocean acidification Southern Ocean DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) Antarctic Southern Ocean |
institution |
Open Polar |
collection |
DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) |
op_collection_id |
ftunivbruxelles |
language |
English |
topic |
Sciences exactes et naturelles Biologie des milieux particuliers Acid-base regulation Antarctica Echinoderms Ocean acidification Sea urchins Southern Ocean |
spellingShingle |
Sciences exactes et naturelles Biologie des milieux particuliers Acid-base regulation Antarctica Echinoderms Ocean acidification Sea urchins Southern Ocean Collard, Marie De Ridder, Chantal David, Bruno Dehairs, Frank Dubois, Philippe Could the acid–base status of Antarctic sea urchins indicate a better-than-expected resilience to near-future ocean acidification? |
topic_facet |
Sciences exactes et naturelles Biologie des milieux particuliers Acid-base regulation Antarctica Echinoderms Ocean acidification Sea urchins Southern Ocean |
description |
Increasing atmospheric carbon dioxide concentration alters the chemistry of the oceans towards more acidic conditions. Polar oceans are particularly affected due to their low temperature, low carbonate content and mixing patterns, for instance upwellings. Calcifying organisms are expected to be highly impacted by the decrease in the oceans' pH and carbonate ions concentration. In particular, sea urchins, members of the phylum Echinodermata, are hypothesized to be at risk due to their high-magnesium calcite skeleton. However, tolerance to ocean acidification in metazoans is first linked to acid–base regulation capacities of the extracellular fluids. No information on this is available to date for Antarctic echinoderms and inference from temperate and tropical studies needs support. In this study, we investigated the acid–base status of 9 species of sea urchins (3 cidaroids, 2 regular euechinoids and 4 irregular echinoids). It appears that Antarctic regular euechinoids seem equipped with similar acid–base regulation systems as tropical and temperate regular euechinoids but could rely on more passive ion transfer systems, minimizing energy requirements. Cidaroids have an acid–base status similar to that of tropical cidaroids. Therefore Antarctic cidaroids will most probably not be affected by decreasing seawater pH, the pH drop linked to ocean acidification being negligible in comparison of the naturally low pH of the coelomic fluid. Irregular echinoids might not suffer from reduced seawater pH if acidosis of the coelomic fluid pH does not occur but more data on their acid–base regulation are needed. Combining these results with the resilience of Antarctic sea urchin larvae strongly suggests that these organisms might not be the expected victims of ocean acidification. However, data on the impact of other global stressors such as temperature and of the combination of the different stressors needs to be acquired to assess the sensitivity of these organisms to global change. SCOPUS: ar.j FLWIN ... |
format |
Article in Journal/Newspaper |
author |
Collard, Marie De Ridder, Chantal David, Bruno Dehairs, Frank Dubois, Philippe |
author_facet |
Collard, Marie De Ridder, Chantal David, Bruno Dehairs, Frank Dubois, Philippe |
author_sort |
Collard, Marie |
title |
Could the acid–base status of Antarctic sea urchins indicate a better-than-expected resilience to near-future ocean acidification? |
title_short |
Could the acid–base status of Antarctic sea urchins indicate a better-than-expected resilience to near-future ocean acidification? |
title_full |
Could the acid–base status of Antarctic sea urchins indicate a better-than-expected resilience to near-future ocean acidification? |
title_fullStr |
Could the acid–base status of Antarctic sea urchins indicate a better-than-expected resilience to near-future ocean acidification? |
title_full_unstemmed |
Could the acid–base status of Antarctic sea urchins indicate a better-than-expected resilience to near-future ocean acidification? |
title_sort |
could the acid–base status of antarctic sea urchins indicate a better-than-expected resilience to near-future ocean acidification? |
publishDate |
2015 |
url |
http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/176478 https://dipot.ulb.ac.be/dspace/bitstream/2013/176478/3/176478.pdf |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic Antarctica Ocean acidification Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Ocean acidification Southern Ocean |
op_source |
Global change biology, 21 |
op_relation |
uri/info:doi/10.1111/gcb.12735 uri/info:scp/84923254387 https://dipot.ulb.ac.be/dspace/bitstream/2013/176478/3/176478.pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/176478 |
op_rights |
1 full-text file(s): info:eu-repo/semantics/restrictedAccess |
_version_ |
1766243076634836992 |