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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AR: Author's response | RR: Referee report | ED: Editor decision
ED: Publish subject to minor revisions (review by editor) (04 Jun 2019) by Hiroshi Kitazato
AR by Susann Rossbach on behalf of the Authors (10 Jun 2019)  Author's response    Manuscript
ED: Publish as is (13 Jun 2019) by Hiroshi Kitazato
AR by Susann Rossbach on behalf of the Authors (13 Jun 2019)  Author's response    Manuscript
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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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