Major loss of coralline algal diversity in response to ocean acidification

© 2021 The Authors. Global Change Biology published by John Wiley & Sons Ltd.

Bibliographische Detailangaben
Veröffentlicht in:Global change biology. - 1999. - 27(2021), 19 vom: 27. Okt., Seite 4785-4798
1. Verfasser: Peña, Viviana (VerfasserIn)
Weitere Verfasser: Harvey, Ben P, Agostini, Sylvain, Porzio, Lucia, Milazzo, Marco, Horta, Paulo, Le Gall, Line, Hall-Spencer, Jason M
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2021
Zugriff auf das übergeordnete Werk:Global change biology
Schlagworte:Journal Article adaptation biodiversity climate change ecosystem engineers evolutionary history macroalgae psbA seaweeds
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520 |a Calcified coralline algae are ecologically important in rocky habitats in the marine photic zone worldwide and there is growing concern that ocean acidification will severely impact them. Laboratory studies of these algae in simulated ocean acidification conditions have revealed wide variability in growth, photosynthesis and calcification responses, making it difficult to assess their future biodiversity, abundance and contribution to ecosystem function. Here, we apply molecular systematic tools to assess the impact of natural gradients in seawater carbonate chemistry on the biodiversity of coralline algae in the Mediterranean and the NW Pacific, link this to their evolutionary history and evaluate their potential future biodiversity and abundance. We found a decrease in the taxonomic diversity of coralline algae with increasing acidification with more than half of the species lost in high pCO2 conditions. Sporolithales is the oldest order (Lower Cretaceous) and diversified when ocean chemistry favoured low Mg calcite deposition; it is less diverse today and was the most sensitive to ocean acidification. Corallinales were also reduced in cover and diversity but several species survived at high pCO2 ; it is the most recent order of coralline algae and originated when ocean chemistry favoured aragonite and high Mg calcite deposition. The sharp decline in cover and thickness of coralline algal carbonate deposits at high pCO2 highlighted their lower fitness in response to ocean acidification. Reductions in CO2 emissions are needed to limit the risk of losing coralline algal diversity 
650 4 |a Journal Article 
650 4 |a adaptation 
650 4 |a biodiversity 
650 4 |a climate change 
650 4 |a ecosystem engineers 
650 4 |a evolutionary history 
650 4 |a macroalgae 
650 4 |a psbA 
650 4 |a seaweeds 
700 1 |a Harvey, Ben P  |e verfasserin  |4 aut 
700 1 |a Agostini, Sylvain  |e verfasserin  |4 aut 
700 1 |a Porzio, Lucia  |e verfasserin  |4 aut 
700 1 |a Milazzo, Marco  |e verfasserin  |4 aut 
700 1 |a Horta, Paulo  |e verfasserin  |4 aut 
700 1 |a Le Gall, Line  |e verfasserin  |4 aut 
700 1 |a Hall-Spencer, Jason M  |e verfasserin  |4 aut 
773 0 8 |i Enthalten in  |t Global change biology  |d 1999  |g 27(2021), 19 vom: 27. Okt., Seite 4785-4798  |w (DE-627)NLM098239996  |x 1365-2486  |7 nnas 
773 1 8 |g volume:27  |g year:2021  |g number:19  |g day:27  |g month:10  |g pages:4785-4798 
856 4 0 |u http://dx.doi.org/10.1111/gcb.15757  |3 Volltext 
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