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An Introduction to the World's Oceans, 10/e
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The Benthos: Dwellers of the Sea Floor

Internet Exercises
What are the major causes of coral reef ecosystem decline? Why is the coral reef system important to the biodiversity of the coral reef? What recommendations have been made for the preservation and utilization of the reef community?
Using information provided at the EPA's Biological Indicator's web page, discuss why benthic macroinvertebrates make good indicators of environmental quality.