Articles | Volume 16, issue 13
Biogeosciences, 16, 2635–2650, 2019
https://doi.org/10.5194/bg-16-2635-2019
Biogeosciences, 16, 2635–2650, 2019
https://doi.org/10.5194/bg-16-2635-2019

Research article 09 Jul 2019

Research article | 09 Jul 2019

Light-dependent calcification in Red Sea giant clam Tridacna maxima

Susann Rossbach et al.

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Abundance, primary production rates and net calcification rates of Tridacna maxima giant clams at two reefs in the Central Red Sea Susann Rossbach, Vincent Saderne, Andrea Anton, and Carlos M. Duarte https://doi.org/10.1594/PANGAEA.903560

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Short summary
Giant clams including the species Tridacna maxima are unique among bivalves as they live in symbiosis with unicellular algae and generally function as net photoautotrophs. Light is therefore crucial for these species to thrive. We show that net calcification and photosynthetic rates of T. maxima are light dependent, with maximum rates at conditions comparable to 4 m water depth, reflected also in the depth-related distribution in the Red Sea with maximum abundances in shallow sunlit coral reefs.
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