Extinction and Biodiversity

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The Extinction of One Species Effects Biodiversity and Can Lead to the Collapse of an Entire Ecosystem Extinction is a natural process. It has been occurring on Earth since life began. Approximately ninety-nine percent of all species that existed are now extinct. It is one way for nature to keep itself in balance. With the introduction of humans came drastic changes. Species reached extinction more quickly as a result of humans satisfying their needs and wants. Humans inevitably took extinction out of nature’s control and made it difficult, if not impossible, for nature to keep balance of its essential biodiversity. People are becoming more aware of the importance of biodiversity. There are many groups and organizations that are working to eliminate extinction caused by human activities. The International Union for Conservation of Nature and Natural Resources has created the Red List that ranks species from least concern to extinct. (IUCN, 2008) Of the 45,000 species evaluated in 2008 approximately 38% were found to be close to extinction. Each species that is lost changes the dynamics of the environment is some way. There are far too many species to list. This paper will focus on coral and coral reefs. Coral reefs have been in existence for millions of years. They provide crucial habitats for marine life. Coral reefs are often referred to as the “rainforests of the seas”. They are both the largest biological structures and the most biodiverse ecosystems on Earth. (MacPherson, 2009) Reefs are basically formed from the joined limestone skeletons of small invertebrate animals known as coral polyps. The keystone to a coral reef community is the stony coral. (EPA, 2008) The coral are sensitive to changes in seawater. Severe changes can kill coral and destroy the reef. Loss of coral reefs can cause enormous harm to the environment. Coral reefs are found in
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