Reef Algae - Middle Coral Reef Producers (Plants)

Reef Algae
Cooperative Research Centre
Great Barrier Coral Reef

Algae are marine plants that are simple in structure and are different from typical land plants because they lack roots, stems and true leaves. Algae have a large variety of growth forms ranging form single celled plankton algae to large seaweeds that can reach lengths of several metres. In contrast, seagrasses are true flowering plants like many land plants.

Algae play a very important role in the marine ecosystem. They are the primary producers that form the basis of most marine food chains. Phytoplankton is particularly important in this regard, and is a considerable sink for carbon dioxide. Photosynthesis uses energy from sunlight to convert carbon dioxide and water into food and oxygen. On coral reefs, calcareous algae have a significant role in cementing the reef together. Large algae may also provide homes for a wide variety of small organisms.

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