ALGAE The focus will be less on taxonomy and more on the importance of algae in the coral/reef ecosystem.

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Presentation transcript:

ALGAE The focus will be less on taxonomy and more on the importance of algae in the coral/reef ecosystem

Green Algae (Chlorophyta) Halimeda Caulerpa sertularoides Caulerpa racemosaCodium

Brown Algae (Phaeophyta) Dictyota spp. Padina spp

Red Algae (Rhodophyta ) Galaxaura sp. Jania sp. Porolithium sp.

Dinoflagellates (Pyrrhophyta) = Zooxanthellae

Active removal of CO 2 enhances carbonate precipitation

FOOD SOURCE Corals are known microcarnivores, feeding on zooplankton; this source may not be sufficient to sustain coral only providing 10-20% of daily energy needs. Algae themselves are not be digested, but 94-98% of organic carbon produced by algae is utilized by the coral host. EXCRETION Zoothanthellae remove phosphorus as a waste product of coral. Dissolved phosphate may inhibit calcification. Zoothanthellae remove waste CO 2 from coral.

Blue-Green Algae (Cyanophyta) Black-band disease

RESOURCES Littler, D. S., M. M. Littler, K. E. Bucher, and J. N. Norris Marine Plants of the Caribbean. A Field Guide from Florida to Brazil. Smithsonian Institution Press, Washington, D.C. 263 p. Humann, P Reef Coral Identification. New World Publications, Inc., Jacksonville, Florida. 239 p.