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Advances in the aquatic sciences
REVIEW

Macroalgal calcification and the effects of ocean acidification and global warming

Fangfang Yang A B , Zhangliang Wei A B and Lijuan Long https://orcid.org/0000-0002-1585-3677 A C
+ Author Affiliations
- Author Affiliations

A Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, PR China.

B Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou, 511458, PR China.

C Corresponding author. Email: longlj@scsio.ac.cn

Marine and Freshwater Research 72(12) 1697-1710 https://doi.org/10.1071/MF20316
Submitted: 22 October 2020  Accepted: 5 July 2021   Published: 24 August 2021

Abstract

Calcification by calcified marine macroalgae is crucial to algal growth and the formation and maintenance of coral reefs. It involves complex processes, such as the uptake, transport and storage of Ca2+, HCO3 or CO32–, and the formation of crystals responsible for calcium deposition. Calcification is vulnerable to changes in global climate, including ocean acidification and warming. Studies investigating the mechanisms of macroalgal calcification are limited and restricted to physiological processes; however, the use of new approaches, such as genomics, provides avenues for new understandings. Here, we review the literature on macroalgal calcification from physiological to molecular levels and present a list of key issues that need to be resolved in order to understand the mechanism of calcification. This review offers insights into the potential effects of changing climate conditions on algal calcification to provide an accurate prediction of future changes in reef ecosystems.

Keywords: calcification, calcified macroalgae, ocean acidification, ocean warming.


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