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Decreased motility of flagellated microalgae long-term acclimated to CO2-induced acidified waters

Citation

Wang, Y and Fan, X and Gao, G and Beardall, J and Inaba, K and Hall-Spencer, JM and Xu, D and Zhang, X and Han, W and McMinn, A and Ye, N, Decreased motility of flagellated microalgae long-term acclimated to CO2-induced acidified waters, Nature Climate Change, 10, (6) pp. 561-567. ISSN 1758-678X (2020) [Refereed Article]

Copyright Statement

Copyright 2020 The Authors, under exclusive licence to Springer Nature Limited

DOI: doi:10.1038/s41558-020-0776-2

Abstract

Motility plays a critical role in algal survival and reproduction, with implications for aquatic ecosystem stability. However, the effect of elevated CO2 on marine, brackish and freshwater algal motility is unclear. Here we show, using laboratory microscale and field mesoscale experiments, that three typical phytoplankton species had decreased motility with increased CO2. Polar marine Microglena sp., euryhaline Dunaliella salina and freshwater Chlamydomonas reinhardtii were grown under different CO2 concentrations for 5 years. Long-term acclimated Microglena sp. showed substantially decreased photo-responses in all treatments, with a photophobic reaction affecting intracellular calcium concentration. Genes regulating flagellar movement were significantly downregulated (P < 0.05), alongside a significant increase in gene expression for flagellar shedding (P < 0.05). D. salina and C. reinhardtii showed similar results, suggesting that motility changes are common across flagellated species. As the flagella structure and bending mechanism are conserved from unicellular organisms to vertebrates, these results suggest that increasing surface water CO2 concentrations may affect flagellated cells from algae to fish.

Item Details

Item Type:Refereed Article
Keywords:climate change, flagella, acidification, microalgae
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Marine and estuarine ecology (incl. marine ichthyology)
Objective Division:Environmental Management
Objective Group:Coastal and estuarine systems and management
Objective Field:Coastal or estuarine biodiversity
UTAS Author:McMinn, A (Professor Andrew McMinn)
ID Code:139219
Year Published:2020
Web of Science® Times Cited:1
Deposited By:Ecology and Biodiversity
Deposited On:2020-06-02
Last Modified:2020-12-22
Downloads:0

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