Coral Reefs and Human Activity Keerthi Potluri and Tina Stancheva Human Nature, Technology and the Environment April 15, 2003.

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Presentation transcript:

Coral Reefs and Human Activity Keerthi Potluri and Tina Stancheva Human Nature, Technology and the Environment April 15, 2003

Coral Reefs- Background ecosystem- high biodiversity types of coral reefs

Worldwide Distribution endemic to the Tropics

Structure of Coral Reefs hard skeleton- deposited CO 2 coral polyps zooxanthellae- microscopic algae

Habitat Requirements warm temperature O C sunlight for photosynthesis clear water high salinity, low CO 2 hard substrate

Importance preserve biodiversity potential scientific/medicinal use prevent erosion food source tourism

Anthropogenic Threats fishing human expansion sewage- nutrient-rich H 2 O invasive species pollution

Oil Spills direct damage bioaccumulation interruption of growth long recovery process

Natural Disturbances tropical storms hurricanes global warming- weather patterns levels of CO 2 ocean circulation

Bleaching loss of zooxanthellae small chance of recovery

What can we do to preserve coral reefs? more research control fishing restrict human development- mining, deforestation stop coastal water pollution establish marine reserves

Controversial Issues tourism- good and bad regulations on coral reef use natural recovery local vs. global damage