Tropical Coral Reefs

By:Giovanni Ketchersid and Jonathan Ramirez

The Coral Reefs

Coral Reefs are diverse underwater ecosystems held together by calcium structures secreted by corals. Coral Reefs are built by colonies of tiny animals found in marine waters that contain few nutrients. Most Coral Reefs are built from stony corals, which in turn consists of polyps that cluster in groups. Coral Reefs are also called the rainforest of the sea because of the view and how it is set up in a rainforest design. Shallow coral reefs from some of the most diverse ecosystems on Earth.Tropical Coral Reefs provides a home for at least 25% of Marine animals. Tropical Coral Reefs are some of the most beautiful structures in the sea.

Biotic Factors

Biotic Factors

Phytoplankton, Coralline Algae, Filamentous Turf Algae, Zooxanthellae (creates a symbiotic relationship with the coral), and many species of seaweed

Primary- The most abundant primary consumer is Zooplankton.Other examples of primary consumers are invertebrate larvae,bivalves, gastropods, tunicates, sponges, polychaete and feather duster worms,some,corals,sea urchins,some crabs,green sea turtles,and herbivorous fish.
Secondary- Four main groups- coral feeders (divided into four sub-groups based on the type of coral they eat), benthic feeders (ex-mussels, gastropods, and worms), fish feeders (mostly made up of other larger fish), and plankton feeders (sessile animals such as coral).
Tertiary- Large reef fish such as dolphins and seals.

Abiotic Factors

Temperature and sunlight are two abiotic factors found in nearly every ecosystem, but since the Great Barrier Reef is an aquatic ecosystem, it has some additional abiotic components, including buoyancy, viscosity, light penetration, salts, gases and water density. Buoyancy refers to the force that supports the weight of an organism. Viscosity is the resistance to the movement of sea water. These two abiotic factors contribute to the movement of fish and sea mammals. Light penetrates the ocean surface only about 20 meters. There is much more salt in the Great Barrier Reef than in a freshwater ecosystem, and some biotic components that live near estuaries, where fresh water mixes with salt water, have to deal with changing amounts of salt in the water. Water contains less oxygen than the air. Also, the density of water in the Great Barrier Reef changes with depth, which changes the biotic components that can live in a given depth.

Human Impacts on Tropical Coral Reefs

Sometimes,we may not notice but we are making impacts on tropical coral reefs.For example,some of our trash does not go to the right place.They instead go to coral reefs and hurt the ecosystem.We have also polluted the waters.Not only that,but we are also overfishing in tropical coral reefs.Global climate change is also happening in tropical coral reefs.We have unfortunately did many more things that have harmed tropical coral reefs.
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Classification of the Blacktip Reef Shark





Order - Carcharhiniformes
Family - Carcharhinidae
Genus - Carcharhinus
Species - Melanopterus

Food Web for Tropical Coral Reefs

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