Coral Reefs

Topics: Coral reef, Coral, Algae Pages: 3 (1147 words) Published: May 2, 2013
This is a piece of expository writing about coral reefs. I taught it fitting to write on coral reefs because they are so important and are getting destroyed every day. Coral reefs are underwater structures made from calcium carbonate secreted by corals. Coral reefs are colonies of tiny animals found in marine waters that contain few nutrients. Most coral reefs are built from stony corals, which in turn consist of polyps that cluster in groups. Living coral reefs are the foundation for many marine species, and thus a crucial support for human life. The coral reef ecosystem is an intricate and diverse collection of species that interact with each other and the physical environment. Coral reefs are the homes of many species including crabs, shrimp, oysters, and clams. They also provide extensive recreational and tourism opportunities. Coral reefs are among the most diverse and biologically complex ecosystems on earth, supporting 33% of marine fish species, let’s take a closer look at why coral reefs are important? How they can be destroyed? And how they can be protected?

Coral reefs are important for many reasons. Most importantly, they provide protection and shelter and feeding grounds for many different species of animal and plants. Without coral reefs, fishes are left homeless with nowhere to live and no where to have their babies. Not only do these fish increase the diversity of our world, but also reef fish and mollusks feed between 30 and 40 million people every year. They also make beautiful pets and the money made by catching and selling these animals provides many people with an income so that they can feed their families. And coral are very important in controlling how much carbon dioxide is in the ocean water.  coral polyp turns carbon dioxide in the water into a limestone shell. Without coral, the amount of carbon dioxide in the water would rise dramatically and that would affect all living things on Earth. In addition, coral reefs are very...
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