Biogeosciences
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Articles | Volume 16, issue 13
Articles | Volume 16, issue 13
https://doi.org/10.5194/bg-16-2635-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-16-2635-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 16, issue 13
Research article
 | 
09 Jul 2019
Research article |  | 09 Jul 2019

Light-dependent calcification in Red Sea giant clam Tridacna maxima

Susann Rossbach, Vincent Saderne, Andrea Anton, and Carlos M. Duarte

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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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