Energetic Plasticity Underlies a Variable Response to Ocean Acidification in the Pteropod, Limacina Helicina Antarctica
Ocean acidification, caused by elevated seawater carbon dioxide levels, may have a deleterious impact on energetic processes in animals. Here we show that high PCO2 can suppress metabolism, measured as oxygen consumption, in the pteropod, L. helicina forma antarctica, by ∼20%. The rates measured at...
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ftunisfloridatam:oai:digitalcommons.usf.edu:msc_facpub-3384 2023-05-15T13:35:22+02:00 Energetic Plasticity Underlies a Variable Response to Ocean Acidification in the Pteropod, Limacina Helicina Antarctica Seibel, Brad A. Maas, Amy E. Dierssen, Heidi M. 2012-01-01T08:00:00Z application/pdf https://digitalcommons.usf.edu/msc_facpub/2326 https://digitalcommons.usf.edu/cgi/viewcontent.cgi?article=3384&context=msc_facpub unknown Digital Commons @ University of South Florida https://digitalcommons.usf.edu/msc_facpub/2326 https://digitalcommons.usf.edu/cgi/viewcontent.cgi?article=3384&context=msc_facpub Marine Science Faculty Publications Life Sciences article 2012 ftunisfloridatam 2022-04-07T17:43:38Z Ocean acidification, caused by elevated seawater carbon dioxide levels, may have a deleterious impact on energetic processes in animals. Here we show that high PCO2 can suppress metabolism, measured as oxygen consumption, in the pteropod, L. helicina forma antarctica, by ∼20%. The rates measured at 180–380 µatm (MO2 = 1.25 M−0.25, p = 0.007) were significantly higher (ANCOVA, p = 0.004) than those measured at elevated target CO2 levels in 2007 (789–1000 µatm, = 0.78 M−0.32, p = 0.0008; Fig. 1). However, we further demonstrate metabolic plasticity in response to regional phytoplankton concentration and that the response to CO2 is dependent on the baseline level of metabolism. We hypothesize that reduced regional Chl a levels in 2008 suppressed metabolism and masked the effect of ocean acidification. This effect of food limitation was not, we postulate, merely a result of gut clearance and specific dynamic action, but rather represents a sustained metabolic response to regional conditions. Thus, pteropod populations may be compromised by climate change, both directly via CO2-induced metabolic suppression, and indirectly via quantitative and qualitative changes to the phytoplankton community. Without the context provided by long-term observations (four seasons) and a multi-faceted laboratory analysis of the parameters affecting energetics, the complex response of polar pteropods to ocean acidification may be masked or misinterpreted. Article in Journal/Newspaper Antarc* Antarctica Limacina helicina Ocean acidification Digital Commons University of South Florida (USF) |
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Life Sciences |
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Life Sciences Seibel, Brad A. Maas, Amy E. Dierssen, Heidi M. Energetic Plasticity Underlies a Variable Response to Ocean Acidification in the Pteropod, Limacina Helicina Antarctica |
topic_facet |
Life Sciences |
description |
Ocean acidification, caused by elevated seawater carbon dioxide levels, may have a deleterious impact on energetic processes in animals. Here we show that high PCO2 can suppress metabolism, measured as oxygen consumption, in the pteropod, L. helicina forma antarctica, by ∼20%. The rates measured at 180–380 µatm (MO2 = 1.25 M−0.25, p = 0.007) were significantly higher (ANCOVA, p = 0.004) than those measured at elevated target CO2 levels in 2007 (789–1000 µatm, = 0.78 M−0.32, p = 0.0008; Fig. 1). However, we further demonstrate metabolic plasticity in response to regional phytoplankton concentration and that the response to CO2 is dependent on the baseline level of metabolism. We hypothesize that reduced regional Chl a levels in 2008 suppressed metabolism and masked the effect of ocean acidification. This effect of food limitation was not, we postulate, merely a result of gut clearance and specific dynamic action, but rather represents a sustained metabolic response to regional conditions. Thus, pteropod populations may be compromised by climate change, both directly via CO2-induced metabolic suppression, and indirectly via quantitative and qualitative changes to the phytoplankton community. Without the context provided by long-term observations (four seasons) and a multi-faceted laboratory analysis of the parameters affecting energetics, the complex response of polar pteropods to ocean acidification may be masked or misinterpreted. |
format |
Article in Journal/Newspaper |
author |
Seibel, Brad A. Maas, Amy E. Dierssen, Heidi M. |
author_facet |
Seibel, Brad A. Maas, Amy E. Dierssen, Heidi M. |
author_sort |
Seibel, Brad A. |
title |
Energetic Plasticity Underlies a Variable Response to Ocean Acidification in the Pteropod, Limacina Helicina Antarctica |
title_short |
Energetic Plasticity Underlies a Variable Response to Ocean Acidification in the Pteropod, Limacina Helicina Antarctica |
title_full |
Energetic Plasticity Underlies a Variable Response to Ocean Acidification in the Pteropod, Limacina Helicina Antarctica |
title_fullStr |
Energetic Plasticity Underlies a Variable Response to Ocean Acidification in the Pteropod, Limacina Helicina Antarctica |
title_full_unstemmed |
Energetic Plasticity Underlies a Variable Response to Ocean Acidification in the Pteropod, Limacina Helicina Antarctica |
title_sort |
energetic plasticity underlies a variable response to ocean acidification in the pteropod, limacina helicina antarctica |
publisher |
Digital Commons @ University of South Florida |
publishDate |
2012 |
url |
https://digitalcommons.usf.edu/msc_facpub/2326 https://digitalcommons.usf.edu/cgi/viewcontent.cgi?article=3384&context=msc_facpub |
genre |
Antarc* Antarctica Limacina helicina Ocean acidification |
genre_facet |
Antarc* Antarctica Limacina helicina Ocean acidification |
op_source |
Marine Science Faculty Publications |
op_relation |
https://digitalcommons.usf.edu/msc_facpub/2326 https://digitalcommons.usf.edu/cgi/viewcontent.cgi?article=3384&context=msc_facpub |
_version_ |
1766064791871291392 |