brandt (1883) brown “inclusions” are plant-like organisms that live within the cells brown...
TRANSCRIPT
Brandt (1883)Brandt (1883)
Brown “inclusions” are plant-like organisms that Brown “inclusions” are plant-like organisms that live within the cells live within the cells
of the coral!of the coral!
The life cycleThe life cycleof the zooxanthellaof the zooxanthella(Freudenthal 1962). (Freudenthal 1962).
Host “wastes”Host “wastes”
PhotosyntheticPhotosyntheticproductsproducts
Corals and zooxanthellae: mutualist symbiosesCorals and zooxanthellae: mutualist symbioses
Coral cell
SunlightSunlight
Low external resourcesLow external resources(ie NH(ie NH33 and PO and PO44
2-2-))
HostHost ZooxanthellaeZooxanthellae
Amino acidsAmino acids
NHNH44++
Productivity of open ocean~ 0.01 g C m-2 d-1
Productivity within coral reefsAlgal turfs: 280 g C m-2 d-1 Corals: 40 g C m-2 d-1 Benthic microalgae: 363 g C m-2 d-1
(reviewed by Hatcher 1988).
Productivity of open ocean~ 0.01 g C m-2 d-1
Productivity within coral reefsAlgal turfs: 280 g C m-2 d-1 Corals: 40 g C m-2 d-1 Benthic microalgae: 363 g C m-2 d-1
(reviewed by Hatcher 1988).