Effects of ocean acidification on the potency of macroalgal allelopathy to a common coral
Many coral reefs have phase shifted from coral to macroalgal dominance. Ocean acidification (OA) due to elevated CO is hypothesised to advantage macroalgae over corals, contributing to these shifts, but the mechanisms affecting coral-macroalgal interactions under OA are unknown. Here, we show that (...
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ftunivqespace:oai:espace.library.uq.edu.au:UQ:471807 2023-05-15T17:50:29+02:00 Effects of ocean acidification on the potency of macroalgal allelopathy to a common coral Del Monaco, Carlos Hay, Mark E. Gartrell, Patrick Mumby, Peter J. Diaz-Pulido, Guillermo 2017-02-01 https://espace.library.uq.edu.au/view/UQ:471807 eng eng Nature Publishing Group doi:10.1038/srep41053 issn:2045-2322 orcid:0000-0002-6297-9053 DP-120101778 Not set Climate-change ecology Community ecology 1000 General Journal Article 2017 ftunivqespace https://doi.org/10.1038/srep41053 2020-12-22T12:52:11Z Many coral reefs have phase shifted from coral to macroalgal dominance. Ocean acidification (OA) due to elevated CO is hypothesised to advantage macroalgae over corals, contributing to these shifts, but the mechanisms affecting coral-macroalgal interactions under OA are unknown. Here, we show that (i) three common macroalgae are more damaging to a common coral when they compete under CO concentrations predicted to occur in 2050 and 2100 than under present-day conditions, (ii) that two macroalgae damage corals via allelopathy, and (iii) that one macroalga is allelopathic under conditions of elevated CO, but not at ambient levels. Lipid-soluble, surface extracts from the macroalga Canistrocarpus (=Dictyota) cervicornis were significantly more damaging to the coral Acropora intermedia growing in the field if these extracts were from thalli grown under elevated vs ambient concentrations of CO. Extracts from the macroalgae Chlorodesmis fastigiata and Amansia glomerata were not more potent when grown under elevated CO. Our results demonstrate increasing OA advantages seaweeds over corals, that algal allelopathy can mediate coral-algal interactions, and that OA may enhance the allelopathy of some macroalgae. Other mechanisms also affect coral-macroalgal interactions under OA, and OA further suppresses the resilience of coral reefs suffering blooms of macroalgae. Article in Journal/Newspaper Ocean acidification The University of Queensland: UQ eSpace Scientific Reports 7 1 |
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Open Polar |
collection |
The University of Queensland: UQ eSpace |
op_collection_id |
ftunivqespace |
language |
English |
topic |
Climate-change ecology Community ecology 1000 General |
spellingShingle |
Climate-change ecology Community ecology 1000 General Del Monaco, Carlos Hay, Mark E. Gartrell, Patrick Mumby, Peter J. Diaz-Pulido, Guillermo Effects of ocean acidification on the potency of macroalgal allelopathy to a common coral |
topic_facet |
Climate-change ecology Community ecology 1000 General |
description |
Many coral reefs have phase shifted from coral to macroalgal dominance. Ocean acidification (OA) due to elevated CO is hypothesised to advantage macroalgae over corals, contributing to these shifts, but the mechanisms affecting coral-macroalgal interactions under OA are unknown. Here, we show that (i) three common macroalgae are more damaging to a common coral when they compete under CO concentrations predicted to occur in 2050 and 2100 than under present-day conditions, (ii) that two macroalgae damage corals via allelopathy, and (iii) that one macroalga is allelopathic under conditions of elevated CO, but not at ambient levels. Lipid-soluble, surface extracts from the macroalga Canistrocarpus (=Dictyota) cervicornis were significantly more damaging to the coral Acropora intermedia growing in the field if these extracts were from thalli grown under elevated vs ambient concentrations of CO. Extracts from the macroalgae Chlorodesmis fastigiata and Amansia glomerata were not more potent when grown under elevated CO. Our results demonstrate increasing OA advantages seaweeds over corals, that algal allelopathy can mediate coral-algal interactions, and that OA may enhance the allelopathy of some macroalgae. Other mechanisms also affect coral-macroalgal interactions under OA, and OA further suppresses the resilience of coral reefs suffering blooms of macroalgae. |
format |
Article in Journal/Newspaper |
author |
Del Monaco, Carlos Hay, Mark E. Gartrell, Patrick Mumby, Peter J. Diaz-Pulido, Guillermo |
author_facet |
Del Monaco, Carlos Hay, Mark E. Gartrell, Patrick Mumby, Peter J. Diaz-Pulido, Guillermo |
author_sort |
Del Monaco, Carlos |
title |
Effects of ocean acidification on the potency of macroalgal allelopathy to a common coral |
title_short |
Effects of ocean acidification on the potency of macroalgal allelopathy to a common coral |
title_full |
Effects of ocean acidification on the potency of macroalgal allelopathy to a common coral |
title_fullStr |
Effects of ocean acidification on the potency of macroalgal allelopathy to a common coral |
title_full_unstemmed |
Effects of ocean acidification on the potency of macroalgal allelopathy to a common coral |
title_sort |
effects of ocean acidification on the potency of macroalgal allelopathy to a common coral |
publisher |
Nature Publishing Group |
publishDate |
2017 |
url |
https://espace.library.uq.edu.au/view/UQ:471807 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
doi:10.1038/srep41053 issn:2045-2322 orcid:0000-0002-6297-9053 DP-120101778 Not set |
op_doi |
https://doi.org/10.1038/srep41053 |
container_title |
Scientific Reports |
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7 |
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1 |
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1766157244314943488 |