Sea anemones may thrive in a high CO <inf>2</inf> world

Suggett, DJ; Hall-Spencer, JM; Rodolfo-Metalpa, R; Boatman, TG; Payton, R; Tye Pettay, D; Johnson, VR; Warner, ME; Lawson, T

Sea anemones may thrive in a high CO <inf>2</inf> world

Suggett, DJ

Hall-Spencer, JM Rodolfo-Metalpa, R Boatman, TG Payton, R Tye Pettay, D Johnson, VR Warner, ME Lawson, T

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Publication Type:: Journal Article
Citation:: Global Change Biology, 2012, 18 (10), pp. 3015 - 3025
Issue Date:: 2012-10-01

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Field	Value	Language
dc.contributor.author	Suggett, DJ https://orcid.org/0000-0001-5326-2520	en_US
dc.contributor.author	Hall-Spencer, JM	en_US
dc.contributor.author	Rodolfo-Metalpa, R	en_US
dc.contributor.author	Boatman, TG	en_US
dc.contributor.author	Payton, R	en_US
dc.contributor.author	Tye Pettay, D	en_US
dc.contributor.author	Johnson, VR	en_US
dc.contributor.author	Warner, ME	en_US
dc.contributor.author	Lawson, T	en_US
dc.date.available	2012-06-05	en_US
dc.date.issued	2012-10-01	en_US
dc.identifier.citation	Global Change Biology, 2012, 18 (10), pp. 3015 - 3025	en_US
dc.identifier.issn	1354-1013	en_US
dc.identifier.uri	http://hdl.handle.net/10453/29683
dc.description.abstract	Increased seawater pCO 2, and in turn 'ocean acidification' (OA), is predicted to profoundly impact marine ecosystem diversity and function this century. Much research has already focussed on calcifying reef-forming corals (Class: Anthozoa) that appear particularly susceptible to OA via reduced net calcification. However, here we show that OA-like conditions can simultaneously enhance the ecological success of non-calcifying anthozoans, which not only play key ecological and biogeochemical roles in present day benthic ecosystems but also represent a model organism should calcifying anthozoans exist as less calcified (soft-bodied) forms in future oceans. Increased growth (abundance and size) of the sea anemone (Anemonia viridis) population was observed along a natural CO 2 gradient at Vulcano, Italy. Both gross photosynthesis (P G) and respiration (R) increased with pCO 2 indicating that the increased growth was, at least in part, fuelled by bottom up (CO 2 stimulation) of metabolism. The increase of P G outweighed that of R and the genetic identity of the symbiotic microalgae (Symbiodinium spp.) remained unchanged (type A19) suggesting proximity to the vent site relieved CO 2 limitation of the anemones' symbiotic microalgal population. Our observations of enhanced productivity with pCO 2, which are consistent with previous reports for some calcifying corals, convey an increase in fitness that may enable non-calcifying anthozoans to thrive in future environments, i.e. higher seawater pCO 2. Understanding how CO 2-enhanced productivity of non- (and less-) calcifying anthozoans applies more widely to tropical ecosystems is a priority where such organisms can dominate benthic ecosystems, in particular following localized anthropogenic stress. © 2012 Blackwell Publishing Ltd.	en_US
dc.relation.ispartof	Global Change Biology	en_US
dc.relation.isbasedon	10.1111/j.1365-2486.2012.02767.x	en_US
dc.subject.classification	Ecology	en_US
dc.title	Sea anemones may thrive in a high CO <inf>2</inf> world	en_US
dc.type	Journal Article
utslib.citation.volume	10	en_US
utslib.citation.volume	18	en_US
utslib.for	0602 Ecology	en_US
utslib.for	0502 Environmental Science and Management	en_US
utslib.for	05 Environmental Sciences	en_US
utslib.for	06 Biological Sciences	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Strength - C3 - Climate Change Cluster
utslib.copyright.status	closed_access
pubs.issue	10	en_US
pubs.publication-status	Published	en_US
pubs.volume	18	en_US

Abstract:

Increased seawater pCO 2, and in turn 'ocean acidification' (OA), is predicted to profoundly impact marine ecosystem diversity and function this century. Much research has already focussed on calcifying reef-forming corals (Class: Anthozoa) that appear particularly susceptible to OA via reduced net calcification. However, here we show that OA-like conditions can simultaneously enhance the ecological success of non-calcifying anthozoans, which not only play key ecological and biogeochemical roles in present day benthic ecosystems but also represent a model organism should calcifying anthozoans exist as less calcified (soft-bodied) forms in future oceans. Increased growth (abundance and size) of the sea anemone (Anemonia viridis) population was observed along a natural CO 2 gradient at Vulcano, Italy. Both gross photosynthesis (P G) and respiration (R) increased with pCO 2 indicating that the increased growth was, at least in part, fuelled by bottom up (CO 2 stimulation) of metabolism. The increase of P G outweighed that of R and the genetic identity of the symbiotic microalgae (Symbiodinium spp.) remained unchanged (type A19) suggesting proximity to the vent site relieved CO 2 limitation of the anemones' symbiotic microalgal population. Our observations of enhanced productivity with pCO 2, which are consistent with previous reports for some calcifying corals, convey an increase in fitness that may enable non-calcifying anthozoans to thrive in future environments, i.e. higher seawater pCO 2. Understanding how CO 2-enhanced productivity of non- (and less-) calcifying anthozoans applies more widely to tropical ecosystems is a priority where such organisms can dominate benthic ecosystems, in particular following localized anthropogenic stress. © 2012 Blackwell Publishing Ltd.

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http://hdl.handle.net/10453/29683