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Crustose coralline algae display sensitivity to near future global ocean change scenarios


Britton, D and Mundy, CN and Noisette, F and McGraw, CM and Hurd, CL, Crustose coralline algae display sensitivity to near future global ocean change scenarios, ICES Journal of Marine Science, 78, (10) Article fsab220. ISSN 1054-3139 (2021) [Refereed Article]

Copyright Statement

Copyright International Council for the Exploration of the Sea 2021. All rights reserved.

DOI: doi:10.1093/icesjms/fsab220


Most research investigating how ocean warming and acidification will impact marine species has focused on visually dominant species, such as kelps and corals, while ignoring visually cryptic species such as crustose coralline algae (CCA). CCA are important keystone species that provide settlement cues for invertebrate larvae and can be highly sensitive to global ocean change. However, few studies have assessed how CCA respond to low emission scenarios or conditions. In a laboratory experiment, we examined the responses of temperate CCA assemblages to combined warming and acidification projected under low, medium, and high emissions. Net calcification and net photosynthesis significantly declined in all emissions scenarios, while significant reductions in relative growth rates and increases in percentage bleaching were observed in the highest emission scenario. The negative responses of CCA to both low and medium emissions suggest that they may be adversely impacted by combined warming and acidification by 2030 if current emissions are sustained. This will have far reaching consequences for commercially important invertebrates that rely on them to induce settlement of larvae. These findings highlight the need to take rapid action to preserve these critical keystone species and the valuable services they provide.

Item Details

Item Type:Refereed Article
Keywords:ocean acidification, seaweed, coralline algae, calcification, bleaching, crustose coralline algae, physiology
Research Division:Biological Sciences
Research Group:Plant biology
Research Field:Phycology (incl. marine grasses)
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the environmental sciences
UTAS Author:Britton, D (Dr Damon Britton)
UTAS Author:Mundy, CN (Dr Craig Mundy)
UTAS Author:Noisette, F (Dr Fanny Noisette)
UTAS Author:Hurd, CL (Professor Catriona Hurd)
ID Code:147964
Year Published:2021
Web of Science® Times Cited:1
Deposited By:Ecology and Biodiversity
Deposited On:2021-11-25
Last Modified:2022-07-11

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