Articles | Volume 16, issue 13
Biogeosciences, 16, 2635–2650, 2019
Biogeosciences, 16, 2635–2650, 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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Cited articles

Adams, A. L., Needham, E. W., and Knauer, J.: The effect of shade on water quality parameters and survival and growth of juvenile fluted giant clams, Tridacna squamosa, cultured in a land-based growth trial, Aquacult. Int., 21, 1311–1324,, 2013. 
Addessi, L.: Giant clam bleaching in the lagoon of Takapoto atoll (French Polynesia), Coral Reefs, 19, 220–220,, 2001. 
Alcazar, S. N.: Observations on predators of giant clams (Bivalvia: Family Tridacnidae), Silliman Journal, 33, 54–57, 1986. 
Allemand, D., Tambutté, É., Zoccola, D., and Tambutté, S.: Coral Calcification, Cells to Reefs, in: Coral Reefs: An Ecosystem in Transition, edited by: Dubinsky, Z. and Stambler, N., Springer, Dordrecht,, 2011. 
Anderson, D. R. and Burnham, K.: Model selection and multi-model inference, 2nd Edn., 63 pp., Springer-Verlag, NY, 2004. 
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.
Final-revised paper