Temporal fluctuations in seawater pCO2 may be as important as mean differences when determining physiological sensitivity in natural systems
Most studies assessing the impactsofocean acidification (OA) onbenthic marine invertebrates have used stable mean pH/pCO2 levelsto highlight variation in the physiological sensitivities in a range of taxa. However, many marine environments experience natural fluctuations in carbonate chemistry, and...
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2016
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Online Access: | http://hdl.handle.net/10447/207380 https://doi.org/10.1093/icesjms/fsv232 http://icesjms.oxfordjournals.org/ |
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ftunivpalermo:oai:iris.unipa.it:10447/207380 2024-02-11T10:07:35+01:00 Temporal fluctuations in seawater pCO2 may be as important as mean differences when determining physiological sensitivity in natural systems Small, D. Bertolini, C. Graham, H. Hauton, C. Hall Spencer, J. Rastrick, S. MILAZZO, Marco Small, D. Milazzo, M. Bertolini, C. Graham, H. Hauton, C. Hall-Spencer, J. Rastrick, S. 2016 http://hdl.handle.net/10447/207380 https://doi.org/10.1093/icesjms/fsv232 http://icesjms.oxfordjournals.org/ eng eng Oxford University Press info:eu-repo/semantics/altIdentifier/wos/WOS:000371142000010 volume:73 issue:3 firstpage:604 lastpage:612 numberofpages:9 journal:ICES JOURNAL OF MARINE SCIENCE http://hdl.handle.net/10447/207380 doi:10.1093/icesjms/fsv232 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84973931696 http://icesjms.oxfordjournals.org/ info:eu-repo/semantics/closedAccess Acid-base balance Natural variability Ocean acidification Sea urchin Volcanic vent Oceanography Ecology Evolution Behavior and Systematic Aquatic Science info:eu-repo/semantics/article 2016 ftunivpalermo https://doi.org/10.1093/icesjms/fsv232 2024-01-23T23:26:43Z Most studies assessing the impactsofocean acidification (OA) onbenthic marine invertebrates have used stable mean pH/pCO2 levelsto highlight variation in the physiological sensitivities in a range of taxa. However, many marine environments experience natural fluctuations in carbonate chemistry, and to date little attempt has been made to understand the effect of naturally fluctuating seawater pCO2 (pCO2sw) on the physiological capacity of organisms to maintain acid-base homeostasis. Here, for the first time, we exposed two species of sea urchin with different acid-base tolerances, Paracentrotus lividus and Arbacia lixula, to naturally fluctuating pCO2sw conditions at shallow water CO2 seep systems (Vulcano, Italy) and assessed their acid-base responses. Both sea urchin species experienced fluctuations in extracellular coelomic fluid pH, pCO2, and [HCO-3] (pHe, pCO2e, and [HCO-3]e, respectively) in line with fluctuations in pCO2sw. The less tolerant species, P. lividus, had the greatest capacity for [HCO-3]e buffering in response to acute pCO2sw fluctuations, but it also experienced greater extracellular hypercapnia and acidification and was thus unabletofully compensate for acid-basedisturbances. Conversely, themore tolerant A.lixula reliedonnon-bicarbonate protein buffering and greater respiratory control. In the light of these findings, we discuss the possible energetic consequences of increased reliance on bicarbonate buffering activity in P. lividus compared with A. lixula and how these differing physiological responses to acute fluctuations in pCO2sw may be as important as chronic responses to mean changes in pCO2sw when considering how CO2 emissions will affect survival and success of marine organisms within naturally assembled systems. Article in Journal/Newspaper Ocean acidification IRIS Università degli Studi di Palermo ICES Journal of Marine Science 73 3 604 612 |
institution |
Open Polar |
collection |
IRIS Università degli Studi di Palermo |
op_collection_id |
ftunivpalermo |
language |
English |
topic |
Acid-base balance Natural variability Ocean acidification Sea urchin Volcanic vent Oceanography Ecology Evolution Behavior and Systematic Aquatic Science |
spellingShingle |
Acid-base balance Natural variability Ocean acidification Sea urchin Volcanic vent Oceanography Ecology Evolution Behavior and Systematic Aquatic Science Small, D. Bertolini, C. Graham, H. Hauton, C. Hall Spencer, J. Rastrick, S. MILAZZO, Marco Temporal fluctuations in seawater pCO2 may be as important as mean differences when determining physiological sensitivity in natural systems |
topic_facet |
Acid-base balance Natural variability Ocean acidification Sea urchin Volcanic vent Oceanography Ecology Evolution Behavior and Systematic Aquatic Science |
description |
Most studies assessing the impactsofocean acidification (OA) onbenthic marine invertebrates have used stable mean pH/pCO2 levelsto highlight variation in the physiological sensitivities in a range of taxa. However, many marine environments experience natural fluctuations in carbonate chemistry, and to date little attempt has been made to understand the effect of naturally fluctuating seawater pCO2 (pCO2sw) on the physiological capacity of organisms to maintain acid-base homeostasis. Here, for the first time, we exposed two species of sea urchin with different acid-base tolerances, Paracentrotus lividus and Arbacia lixula, to naturally fluctuating pCO2sw conditions at shallow water CO2 seep systems (Vulcano, Italy) and assessed their acid-base responses. Both sea urchin species experienced fluctuations in extracellular coelomic fluid pH, pCO2, and [HCO-3] (pHe, pCO2e, and [HCO-3]e, respectively) in line with fluctuations in pCO2sw. The less tolerant species, P. lividus, had the greatest capacity for [HCO-3]e buffering in response to acute pCO2sw fluctuations, but it also experienced greater extracellular hypercapnia and acidification and was thus unabletofully compensate for acid-basedisturbances. Conversely, themore tolerant A.lixula reliedonnon-bicarbonate protein buffering and greater respiratory control. In the light of these findings, we discuss the possible energetic consequences of increased reliance on bicarbonate buffering activity in P. lividus compared with A. lixula and how these differing physiological responses to acute fluctuations in pCO2sw may be as important as chronic responses to mean changes in pCO2sw when considering how CO2 emissions will affect survival and success of marine organisms within naturally assembled systems. |
author2 |
Small, D. Milazzo, M. Bertolini, C. Graham, H. Hauton, C. Hall-Spencer, J. Rastrick, S. |
format |
Article in Journal/Newspaper |
author |
Small, D. Bertolini, C. Graham, H. Hauton, C. Hall Spencer, J. Rastrick, S. MILAZZO, Marco |
author_facet |
Small, D. Bertolini, C. Graham, H. Hauton, C. Hall Spencer, J. Rastrick, S. MILAZZO, Marco |
author_sort |
Small, D. |
title |
Temporal fluctuations in seawater pCO2 may be as important as mean differences when determining physiological sensitivity in natural systems |
title_short |
Temporal fluctuations in seawater pCO2 may be as important as mean differences when determining physiological sensitivity in natural systems |
title_full |
Temporal fluctuations in seawater pCO2 may be as important as mean differences when determining physiological sensitivity in natural systems |
title_fullStr |
Temporal fluctuations in seawater pCO2 may be as important as mean differences when determining physiological sensitivity in natural systems |
title_full_unstemmed |
Temporal fluctuations in seawater pCO2 may be as important as mean differences when determining physiological sensitivity in natural systems |
title_sort |
temporal fluctuations in seawater pco2 may be as important as mean differences when determining physiological sensitivity in natural systems |
publisher |
Oxford University Press |
publishDate |
2016 |
url |
http://hdl.handle.net/10447/207380 https://doi.org/10.1093/icesjms/fsv232 http://icesjms.oxfordjournals.org/ |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000371142000010 volume:73 issue:3 firstpage:604 lastpage:612 numberofpages:9 journal:ICES JOURNAL OF MARINE SCIENCE http://hdl.handle.net/10447/207380 doi:10.1093/icesjms/fsv232 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84973931696 http://icesjms.oxfordjournals.org/ |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1093/icesjms/fsv232 |
container_title |
ICES Journal of Marine Science |
container_volume |
73 |
container_issue |
3 |
container_start_page |
604 |
op_container_end_page |
612 |
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1790606218375462912 |