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Coral Reef Food Web

Coral reefs, or the ‘rainforests of the sea,’ are inhabited by organisms called corals, a member of the phylum Cnidaria. Although they look like plants, they are animals living symbiotically with zooxanthellae, a photosynthetic alga.

Along Australia’s northeastern coast, the Great Barrier Reef is the largest coral reef on Earth. It is incredibly diverse, with over 3,000 species of coral and other marine species.

Trophic Levels in the Coral Reef Food Web

Here is an example of a coral reef food web showing the interdependence of the different organisms in the arctic tundra biome:

1. Producers: They form the basis for the entire food web. These are typically photosynthetic organisms that convert sunlight into energy through photosynthesis. The primary producers of coral reefs are mainly seaweed, seagrass, and phytoplankton. These microscopic algae reside within the tissues of coral polyps, providing them with essential nutrients and energy.

2. Primary Consumers: These organisms feed directly on the primary producers. Coral is a primary consumer in the Great Barrier Reef. Zooplankton and herbivorous fishes, such as parrotfish, green sea turtles, surgeonfish, and rabbitfish, are the other primary consumers in the coral reef. They graze on algae-covered surfaces, helping to prevent overgrowth.

3. Secondary Consumers: Secondary consumers prey on primary consumers in the next trophic level. These predatory fish include stingrays, triggerfish, lionfish, squid, octopuses, and larger fishes. Coral polyps, jellyfish, fan worm, and blue chromis are also abundant on the coral reef that feeds on smaller fishes, crustaceans, and zooplanktons. Sometimes, corals also act as secondary consumers based on the food chain in which they participate.

4. Tertiary Consumers: These predators feed on secondary consumers. These predators are often larger fish such as the angelfish, puffer fish, barracuda, groupers, and sharks. They help control lower trophic levels populations, ensuring the ecosystem’s stability.

Apex predators occupy the top of the coral reef food web. These top-tier predators, such as the reef sharks, feed on the angelfish and the blue Chromis to complete the food web.

Article was last reviewed on Saturday, August 26, 2023

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