Regional variation in δ<sup>13</sup>C of coral reef macroalgae

Lovelock, CE; Reef, R; Raven, JA; Pandolfi, JM

Regional variation in δ<sup>13</sup>C of coral reef macroalgae

Lovelock, CE Reef, R Raven, JA Pandolfi, JM

Permalink

Publisher:: Wiley
Publication Type:: Journal Article
Citation:: Limnology and Oceanography, 2020, 65, (10), pp. 2291-2302
Issue Date:: 2020-10-01

Closed Access

	Filename	Description	Size
	lno.11453.pdf		1.13 MB	Adobe PDF	View/Open

Copyright Clearance Process

Recently Added
In Progress
Closed Access

This item is closed access and not available.

Full metadata record

Field	Value	Language
dc.contributor.author	Lovelock, CE
dc.contributor.author	Reef, R
dc.contributor.author	Raven, JA
dc.contributor.author	Pandolfi, JM
dc.date.accessioned	2021-06-02T03:38:58Z
dc.date.available	2021-06-02T03:38:58Z
dc.date.issued	2020-10-01
dc.identifier.citation	Limnology and Oceanography, 2020, 65, (10), pp. 2291-2302
dc.identifier.issn	0024-3590
dc.identifier.issn	1939-5590
dc.identifier.uri	http://hdl.handle.net/10453/149346
dc.description.abstract	Macroalgae are important components on coral reefs that underpin food webs but are also indicators of declines in coral reef condition. The sensitivity of macroalgal communities to environmental factors, including climate and pollutants from the land, is important for the future state of coral reefs. We assessed regional variation in the photosynthetic physiology of macroalgae on the Great Barrier Reef and Moreton Bay, Queensland, Australia, using δ C, tissue chemistry, and metabolic indicators over broad environmental gradients from six sites spanning 13° of latitude and varying distance from shore. Our data set included 568 samples from 54 genera and 19 macroalgal orders. The δ C of tissues had a strong taxonomic basis (explaining 66% of the variation in δ C), varying significantly among algal orders. Particularly low values of δ C, indicating direct use of CO in photosynthesis, were mainly associated with lineages within the Rhodophyta. We observed declines in δ C with increasing depth (inshore only) and latitude, from offshore to inshore sites and with increasing tissue N and N : P ratio. Variation in δ C of tissues among macroalgal lineages suggests evolution of a range of CO acquisition pathways. Patterns in δ C availability are most consistent with higher availability of CO in cooler water and inshore sites. δ C in macroalgae could provide an important tool for monitoring changes in CO with increasing atmospheric CO , with changes in ocean circulation and with changes to runoff from the land to the coastal oceans. 13 13 13 13 13 13 13 13 2(aq) 2 2(aq) 2(aq) 2
dc.language	en
dc.publisher	Wiley
dc.relation.ispartof	Limnology and Oceanography
dc.relation.isbasedon	10.1002/lno.11453
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	04 Earth Sciences, 05 Environmental Sciences, 06 Biological Sciences
dc.subject.classification	Marine Biology & Hydrobiology
dc.title	Regional variation in δ<sup>13</sup>C of coral reef macroalgae
dc.type	Journal Article
utslib.citation.volume	65
utslib.for	04 Earth Sciences
utslib.for	05 Environmental Sciences
utslib.for	06 Biological Sciences
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
utslib.copyright.status	closed_access	*
pubs.consider-herdc	false
dc.date.updated	2021-06-02T03:38:57Z
pubs.issue	10
pubs.publication-status	Published
pubs.volume	65
utslib.citation.issue	10

Abstract:

Macroalgae are important components on coral reefs that underpin food webs but are also indicators of declines in coral reef condition. The sensitivity of macroalgal communities to environmental factors, including climate and pollutants from the land, is important for the future state of coral reefs. We assessed regional variation in the photosynthetic physiology of macroalgae on the Great Barrier Reef and Moreton Bay, Queensland, Australia, using δ C, tissue chemistry, and metabolic indicators over broad environmental gradients from six sites spanning 13° of latitude and varying distance from shore. Our data set included 568 samples from 54 genera and 19 macroalgal orders. The δ C of tissues had a strong taxonomic basis (explaining 66% of the variation in δ C), varying significantly among algal orders. Particularly low values of δ C, indicating direct use of CO in photosynthesis, were mainly associated with lineages within the Rhodophyta. We observed declines in δ C with increasing depth (inshore only) and latitude, from offshore to inshore sites and with increasing tissue N and N : P ratio. Variation in δ C of tissues among macroalgal lineages suggests evolution of a range of CO acquisition pathways. Patterns in δ C availability are most consistent with higher availability of CO in cooler water and inshore sites. δ C in macroalgae could provide an important tool for monitoring changes in CO with increasing atmospheric CO , with changes in ocean circulation and with changes to runoff from the land to the coastal oceans. 13 13 13 13 13 13 13 13 2(aq) 2 2(aq) 2(aq) 2

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/149346