HOW HUMAN ACTIVITIES AFFECT MARINE ECOSYSTEM?!
Human activities are disrupting and degrading some ecological and economic services provided by marine aquatic systems, especially coastal marshes, shorelines, mangrove forests, and coral reefs. In 2008, the U. S. National Center for Ecological Analysis and Synthesis (NCEAS) used computer models to analyze and provide the first-ever comprehensive map of the effects of 17 different types of human activities on the world’s oceans. In this 4-year study, an international team of scientists found that human activity has heavily affected 41% of the world’s ocean area. No area of the oceans has been left completely untouched, according to the report. In their desire to live near a coast, some people are unwittingly destroying or degrading the aquatic biodiversity and the ecological and economic services that make coastal areas so enjoyable and valuable. In 2010, about 45% of the world’s population and more than half of the U.S. population lived along or near coasts and these percentages are i