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Brandt (1883) Brown “inclusions” are plant-like organisms that live within the cells Brown “inclusions” are plant-like organisms that live within.

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Presentation on theme: "Brandt (1883) Brown “inclusions” are plant-like organisms that live within the cells Brown “inclusions” are plant-like organisms that live within."— Presentation transcript:

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5 Brandt (1883) Brown “inclusions” are plant-like organisms that live within the cells Brown “inclusions” are plant-like organisms that live within the cells of the coral! of the coral!

6 The life cycle of the zooxanthella (Freudenthal 1962).

7 Host “wastes” Photosyntheticproducts Corals and zooxanthellae: mutualist symbioses Coral cell Sunlight

8 Low external resources (ie NH 3 and PO 4 2- ) HostZooxanthellae Amino acids NH 4 +

9 Productivity of open ocean ~ 0.01 g C m- 2 d -1 Productivity within coral reefs Algal 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).

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