Calcification in the coralline red algae: a synthesis

McCoy, Sophie J.; Pueschel, Curt M.; Cornwall, Christopher E.; Comeau, Steeve; Kranz, Sven A.; Spindel, Nathan B.; Borowitzka, Michael A.

doi:10.1080/00318884.2023.2285673

Cited by 6 publications

(4 citation statements)

References 195 publications

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“…Our results confirm the importance of CA in the delivery of inorganic carbon substrate for photosynthesis in B. soriferum with clear physiological impact beyond inter-individual variability as has been previously proposed in other species [ 12 , 51 , 52 ]. In addition to regulating photosynthetic rate (an indirect control on calcification), CA may also directly affect H + concentrations and therefore local pH—a crucial environmental parameter for the deposition of calcified material [ 53 ].…”

Section: Discussionsupporting

confidence: 91%

“…The balance between organic carbon fixation and inorganic carbon precipitation results in a complex carbon budget in marine calcifiers—with significant implications for understanding their physiology [ 12 ], and in resolving their role in carbon sequestration and storage [ 6 , 38 ]. Here, we provide empirical evidence for the close coupling of calcification and photosynthesis in the calcifying red alga B. soriferum , resulting in internal carbon recycling and a significant reduction in expected carbon release.…”

Section: Discussionmentioning

confidence: 99%

“…In the context of projected climate change, ocean acidification is expected to significantly reduce coralline algae calcification (e.g. [ 8 , 12 , 27 , 50 ]) but photosynthesis may be less affected (e.g. [ 27 ]), resulting in a potential disruption in the carbon recycling pathway presented here.…”

Section: Discussionmentioning

confidence: 99%

“…[7][8][9]) but our prediction accuracy remains limited by key knowledge gaps about their physiology [10]. In particular, the coralline algal calcification mechanism and the link between photosynthesis and calcification are poorly defined [11,12]. Resolving these physiological pathways would significantly improve our understanding of coralline algal physiology, with direct relevance for refining climate change predictions at organismal to habitat scales, and in resolving the role of calcifying algae in natural carbon sequestration [13].…”

Section: Introductionmentioning

confidence: 99%

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Efficient carbon recycling between calcification and photosynthesis in red coralline algae

Mao,

Burdett,

Kamenos

2024

Biol. Lett.

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Red coralline algae create abundant, spatially vast, reef ecosystems throughout our coastal oceans with significant ecosystem service provision, but our understanding of their basic physiology is lacking. In particular, the balance and linkages between carbon-producing and carbon-sequestering processes remain poorly constrained, with significant implications for understanding their role in carbon sequestration and storage. Using dual radioisotope tracing, we provide evidence for coupling between photosynthesis (which requires CO 2 ) and calcification (which releases CO 2 ) in the red coralline alga Boreolithothamnion soriferum (previously Lithothamnion soriferum )—a marine ecosystem engineer widely distributed across Atlantic mid-high latitudes. Of the sequestered HCO 3 − , 38 ± 22% was deposited as carbonate skeleton while 39 ± 14% was incorporated into organic matter via photosynthesis. Only 38 ± 2% of the sequestered HCO 3 − was transformed into CO 2 , and almost 40% of that was internally recycled as photosynthetic substrate, reducing the net release of carbon to 23 ± 3% of the total uptake. The calcification rate was strongly dependent on photosynthetic substrate production, supporting the presence of photosynthetically enhanced calcification. The efficient carbon-recycling physiology reported here suggests that calcifying algae may not contribute as much to marine CO 2 release as is currently assumed, supporting a reassessment of their role in blue carbon accounting.

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Section: Discussionsupporting

confidence: 91%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Efficient carbon recycling between calcification and photosynthesis in red coralline algae

Mao,

Burdett,

Kamenos

2024

Biol. Lett.

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Attached and free-living crustose coralline algae and their functional traits in the geological record and today

Teichert

2024

Facies

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Crustose coralline algae (CCA) are important ecosystem engineers and carbonate producers today and in the geological past. While there is an increasing number of publications on CCA every year, it is evident that there are many misunderstandings and inconsistencies in the assignment of CCA to taxonomic and functional groups. This is partly because CCA are treated by biologists, ecologists and palaeontologists as well as covered by studies published in journals ranging from geo- to biosciences, so that there is often a mixture of terminology used and differing scientific focus. In this review, a comprehensive overview is given on what is known about CCA, their functional traits and their roles in environments from the present and the past. In this context, some bridges are built between the commonly different viewpoints of ecologists and palaeontologists, including suggesting a common and straightforward terminology, highlighting and partially merging different taxonomic viewpoints as well as summarizing the most important functional traits of CCA. Ideally, future studies should seek to quantitatively analyse potential implications for CCA and their associated organisms under ongoing global change.

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Revisiting the evolution of non-geniculate coralline algae taxonomy: History and perspectives

Leão,

Bahia,

Karez

et al. 2024

Aquatic Botany

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Calcification in the coralline red algae: a synthesis

Cited by 6 publications

References 195 publications

Efficient carbon recycling between calcification and photosynthesis in red coralline algae

Efficient carbon recycling between calcification and photosynthesis in red coralline algae

Attached and free-living crustose coralline algae and their functional traits in the geological record and today

Revisiting the evolution of non-geniculate coralline algae taxonomy: History and perspectives

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