Post on 23-Dec-2015
Presentation Overview
Biological characteristics of reefs Functions of reefs Potential Diseases and Hazards
These polyps reside within a cup-like calcium carbonate skeleton. They have a central opening
surrounded by tentacles which can be extended to
feed on phytoplankton in the water column.
There are two different types of corals Hard Corals known as scleractinians Soft Corals know as gorgonians
Soft coralHard coral
Corals are located in three primary locations
Indo-Pacific
Western North Atlantic
Red SeaIndo-Pacific
They survive in unique conditions that require...
Adequate sunlight Water temperatures between 17-28 Celsius Shallow water depths Low siltation
Corals obtain food via….. Zooxanthellae photosynthesis Predation upon zooplankton and
phytoplankton Absorption of dissolved organic material
Reefs play important roles in the coastal and ocean environment
Habitats for many marine species Breeding grounds for lobster, shrimp, and
various fish Food and shelter Barriers protecting the coasts from storms Sources of sand for beaches Recreational areas for snorkelers, divers and
fishermen
Reefs also clean the surrounding water through sponges that have filtering
systems similar to water treatment plants
Many natural and human-induced factors can harm reefs
Bioerosion by fishes and other marine organisms
Diseases Storms Overfishing Coastal development Pollution
Many inhabitants, such as angelfish and parrotfish, utilize the reef
as a source of food and shelter. But too much feeding causes bioerosion of the reef.
Global warming causes increases in water temperature which can cause harm to the
coral reef environment in the form of coral bleaching.