Responses of macroalgae to CO2 enrichment cannot be inferred solely from their inorganic carbon uptake strategy
Increased plant biomass is observed in terrestrial systems due to rising levels of atmospheric CO2, but responses of marine macroalgae to CO2 enrichment are unclear. The 200% increase in CO2 by 2100 is predicted to enhance the productivity of fleshy macroalgae that acquire inorganic carbon solely as...
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Language: | English |
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John Wiley & Sons Ltd.
2018
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Online Access: | https://eprints.utas.edu.au/29381/ https://eprints.utas.edu.au/29381/1/130035%20-%20Responses%20of%20macroalgae%20to%20CO2%20enrichment%20cannot%20be%20inferred%20solely.pdf |
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ftunivtasmania:oai:eprints.utas.edu.au:29381 2023-05-15T17:51:43+02:00 Responses of macroalgae to CO2 enrichment cannot be inferred solely from their inorganic carbon uptake strategy van der Loos, LM Schmid, M Leal, PP McGraw, CM Britton, DD Revill, AT Virtue, P Nichols, PD Hurd, CL 2018 application/pdf https://eprints.utas.edu.au/29381/ https://eprints.utas.edu.au/29381/1/130035%20-%20Responses%20of%20macroalgae%20to%20CO2%20enrichment%20cannot%20be%20inferred%20solely.pdf en eng John Wiley & Sons Ltd. https://eprints.utas.edu.au/29381/1/130035%20-%20Responses%20of%20macroalgae%20to%20CO2%20enrichment%20cannot%20be%20inferred%20solely.pdf van der Loos, LM, Schmid, M, Leal, PP, McGraw, CM, Britton, DD orcid:0000-0002-9029-7527 , Revill, AT, Virtue, P orcid:0000-0002-9870-1256 , Nichols, PD and Hurd, CL orcid:0000-0001-9965-4917 2018 , 'Responses of macroalgae to CO2 enrichment cannot be inferred solely from their inorganic carbon uptake strategy' , Ecology and Evolution, vol. 9, no. 1 , pp. 125-140 , doi:10.1002/ece3.4679 <http://dx.doi.org/10.1002/ece3.4679>. ocean acidification carbon dioxide climate change seaweed coastal systems carbon uptake strategy carbon dioxide-concentrating mechanism CCM CO2 enrichment macroalgae non-CCM physiology Article PeerReviewed 2018 ftunivtasmania https://doi.org/10.1002/ece3.4679 2021-09-20T22:17:20Z Increased plant biomass is observed in terrestrial systems due to rising levels of atmospheric CO2, but responses of marine macroalgae to CO2 enrichment are unclear. The 200% increase in CO2 by 2100 is predicted to enhance the productivity of fleshy macroalgae that acquire inorganic carbon solely as CO2 (non‐carbon dioxide‐concentrating mechanism [CCM] species—i.e., species without a carbon dioxide‐concentrating mechanism), whereas those that additionally uptake bicarbonate (CCM species) are predicted to respond neutrally or positively depending on their affinity for bicarbonate. Previous studies, however, show that fleshy macroalgae exhibit a broad variety of responses to CO2 enrichment and the underlying mechanisms are largely unknown. This physiological study compared the responses of a CCM species (Lomentaria australis) with a non‐CCM species (Craspedocarpus ramentaceus) to CO2 enrichment with regards to growth, net photosynthesis, and biochemistry. Contrary to expectations, there was no enrichment effect for the non‐CCM species, whereas the CCM species had a twofold greater growth rate, likely driven by a downregulation of the energetically costly CCM(s). This saved energy was invested into new growth rather than storage lipids and fatty acids. In addition, we conducted a comprehensive literature synthesis to examine the extent to which the growth and photosynthetic responses of fleshy macroalgae to elevated CO2 are related to their carbon acquisition strategies. Findings highlight that the responses of macroalgae to CO2 enrichment cannot be inferred solely from their carbon uptake strategy, and targeted physiological experiments on a wider range of species are needed to better predict responses of macroalgae to future oceanic change. Article in Journal/Newspaper Ocean acidification University of Tasmania: UTas ePrints Ecology and Evolution 9 1 125 140 |
institution |
Open Polar |
collection |
University of Tasmania: UTas ePrints |
op_collection_id |
ftunivtasmania |
language |
English |
topic |
ocean acidification carbon dioxide climate change seaweed coastal systems carbon uptake strategy carbon dioxide-concentrating mechanism CCM CO2 enrichment macroalgae non-CCM physiology |
spellingShingle |
ocean acidification carbon dioxide climate change seaweed coastal systems carbon uptake strategy carbon dioxide-concentrating mechanism CCM CO2 enrichment macroalgae non-CCM physiology van der Loos, LM Schmid, M Leal, PP McGraw, CM Britton, DD Revill, AT Virtue, P Nichols, PD Hurd, CL Responses of macroalgae to CO2 enrichment cannot be inferred solely from their inorganic carbon uptake strategy |
topic_facet |
ocean acidification carbon dioxide climate change seaweed coastal systems carbon uptake strategy carbon dioxide-concentrating mechanism CCM CO2 enrichment macroalgae non-CCM physiology |
description |
Increased plant biomass is observed in terrestrial systems due to rising levels of atmospheric CO2, but responses of marine macroalgae to CO2 enrichment are unclear. The 200% increase in CO2 by 2100 is predicted to enhance the productivity of fleshy macroalgae that acquire inorganic carbon solely as CO2 (non‐carbon dioxide‐concentrating mechanism [CCM] species—i.e., species without a carbon dioxide‐concentrating mechanism), whereas those that additionally uptake bicarbonate (CCM species) are predicted to respond neutrally or positively depending on their affinity for bicarbonate. Previous studies, however, show that fleshy macroalgae exhibit a broad variety of responses to CO2 enrichment and the underlying mechanisms are largely unknown. This physiological study compared the responses of a CCM species (Lomentaria australis) with a non‐CCM species (Craspedocarpus ramentaceus) to CO2 enrichment with regards to growth, net photosynthesis, and biochemistry. Contrary to expectations, there was no enrichment effect for the non‐CCM species, whereas the CCM species had a twofold greater growth rate, likely driven by a downregulation of the energetically costly CCM(s). This saved energy was invested into new growth rather than storage lipids and fatty acids. In addition, we conducted a comprehensive literature synthesis to examine the extent to which the growth and photosynthetic responses of fleshy macroalgae to elevated CO2 are related to their carbon acquisition strategies. Findings highlight that the responses of macroalgae to CO2 enrichment cannot be inferred solely from their carbon uptake strategy, and targeted physiological experiments on a wider range of species are needed to better predict responses of macroalgae to future oceanic change. |
format |
Article in Journal/Newspaper |
author |
van der Loos, LM Schmid, M Leal, PP McGraw, CM Britton, DD Revill, AT Virtue, P Nichols, PD Hurd, CL |
author_facet |
van der Loos, LM Schmid, M Leal, PP McGraw, CM Britton, DD Revill, AT Virtue, P Nichols, PD Hurd, CL |
author_sort |
van der Loos, LM |
title |
Responses of macroalgae to CO2 enrichment cannot be inferred solely from their inorganic carbon uptake strategy |
title_short |
Responses of macroalgae to CO2 enrichment cannot be inferred solely from their inorganic carbon uptake strategy |
title_full |
Responses of macroalgae to CO2 enrichment cannot be inferred solely from their inorganic carbon uptake strategy |
title_fullStr |
Responses of macroalgae to CO2 enrichment cannot be inferred solely from their inorganic carbon uptake strategy |
title_full_unstemmed |
Responses of macroalgae to CO2 enrichment cannot be inferred solely from their inorganic carbon uptake strategy |
title_sort |
responses of macroalgae to co2 enrichment cannot be inferred solely from their inorganic carbon uptake strategy |
publisher |
John Wiley & Sons Ltd. |
publishDate |
2018 |
url |
https://eprints.utas.edu.au/29381/ https://eprints.utas.edu.au/29381/1/130035%20-%20Responses%20of%20macroalgae%20to%20CO2%20enrichment%20cannot%20be%20inferred%20solely.pdf |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
https://eprints.utas.edu.au/29381/1/130035%20-%20Responses%20of%20macroalgae%20to%20CO2%20enrichment%20cannot%20be%20inferred%20solely.pdf van der Loos, LM, Schmid, M, Leal, PP, McGraw, CM, Britton, DD orcid:0000-0002-9029-7527 , Revill, AT, Virtue, P orcid:0000-0002-9870-1256 , Nichols, PD and Hurd, CL orcid:0000-0001-9965-4917 2018 , 'Responses of macroalgae to CO2 enrichment cannot be inferred solely from their inorganic carbon uptake strategy' , Ecology and Evolution, vol. 9, no. 1 , pp. 125-140 , doi:10.1002/ece3.4679 <http://dx.doi.org/10.1002/ece3.4679>. |
op_doi |
https://doi.org/10.1002/ece3.4679 |
container_title |
Ecology and Evolution |
container_volume |
9 |
container_issue |
1 |
container_start_page |
125 |
op_container_end_page |
140 |
_version_ |
1766158952264892416 |