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9 Cards in this Set

  • Front
  • Back
Biological Importance of Reefs
1.Oases in a liquid desert: the paradox of the reef
2 High organic productivity
3 Highest biodiversity in the sea
4 Sites of intense biological interaction
5 Biochemical, pharmaceutical resources (Neosporin first found in reef)
6. Sustenance of human populations
Geological Importance
A.Major "carbonate factories" – build limestone
B. Remove CO2 from atmosphere
C. Control ocean circulation, sedimentation
D. Major petroleum reservoirs
E. Record of ancient life: changing "players" on reef "stage"
F. Record of past climates, sea levels
What is a reef?
A coral reef is a rigid structure formed by calcareous skeletal growth of corals and algae in shallow, sunlit tropical seas, with topographic relief capable of breaking the surface and modifying water circulation and sedimentation.
Major Features of a Reef
Framework: Rigid intergrowth of calcareous skeletons
-Cement: glue holding frame together, organic and inorganic origin
-infilling sediments: skeletal debris of reef dwelling animals and plants, major proportion of reef mass
**Types of Reefs
Fringing Reefs
Barrier Reefs
Patch Reefs
Shelf or platform margin reefs
**Major Reef Regions
A. Western and southern Pacific
B. Indian Ocean and Red Sea
C. Eastern Pacific
D. Western Atlantic
Reef Constructional Components
Cnidarians or coelenterates
Sponges or poriferans
Cnidarians or coelenterates
Hydrocorals (fire corals or milleporines
2. Stony corals (scleractinians or hexacorals)
Sponges or poriferans
Coralline sponges