[Coral-List] Coral feeding

Andréa Grottoli grottoli.1 at osu.edu
Thu Jun 1 14:43:45 EDT 2006

Dear James

Our data shows that both photosynthetically, and 
heterotrophically acquired carbon is found in the 
coral tissues and skeleton.    We have not 
directly measured how much carbon from either 
source contributes to the mucus, or what role 
mucus plays in this whole scenario.

Andrea Grottoli

At 02:16 PM 6/1/2006, you wrote:
>Dear Andrea,
>When you say; "into the coral" are you saying 
>that this translocated photosynthate in the form 
>of carbon is going directly into the host issues 
>and not to mucus bi-products? Or are you saying 
>that the translocasted photosynthate or carbon 
>that goes directly to the mucus (which we know 
>is substantial) is part of the "into the coral 
>quote" ? Because If you are saying that the 
>mucus products that are the result of 
>translocated photosynthate defines corals as 
>autotrophic then this is incorrect, because none 
>of this material is going towards the energy 
>buget thus making them heterotrophic. Much of 
>the oxygen is lost into the water-column.
>Davy and Cook have also shown that During 
>thermal bleaching host release factors or HRF 
>diverts surplus carbon away from storage 
>compounds to translocated compounds such as 
>glycerol which is found in mucus and within host tissues.
>Cheers, James
>I believe in compulsory cannibalism.
>If people were forced to eat what they killed,
>there would be no more wars.
>Abbie Hoffman

Andréa G. Grottoli, Assistant Professor
Ohio State University
Department of Geological Sciences
125 South Oval Mall
Columbus, OH 43210-1398
office:  614-292-5782
lab: 614-292-7415
fax: 614-292-7688
email: grottoli.1 at osu.edu
web: www.geology.ohio-state.edu/~grottoli
Office location: 329 Mendenhall Labs


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