Your SlideShare is downloading. ×
Coral Reef Ecosystem - Background Information
Upcoming SlideShare
Loading in...5

Thanks for flagging this SlideShare!

Oops! An error has occurred.

Saving this for later? Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime – even offline.
Text the download link to your phone
Standard text messaging rates apply

Coral Reef Ecosystem - Background Information


Published on

View this presentation for background information on coral reef ecosystems.

View this presentation for background information on coral reef ecosystems.

Published in: Education, Technology
1 Like
  • Be the first to comment

No Downloads
Total Views
On Slideshare
From Embeds
Number of Embeds
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

No notes for slide
  • Maybe add a slide about how they feed
  • New technology for artificial reefs
  • Transcript

    • 1. An Introduction to Coral Reefs
    • 2. What is coral?
      • It’s a living organism!
      • It is an invertebrate
      • 2 different types:
        • Reef Building: Hermatypic
        • Solitary: Ahermatypic
      • Coral is cousins to jellyfish and anemones (Cnidarians)
      • Today we will talk mainly about reef building coral
      Sun Coral Polyps
    • 3. Where Can You Find Coral Reefs?
      • Coral is found all over the world:
        • Tropical
        • Temperate
        • Polar
      • Only tropical corals build reefs
      Coral reefs around the world
    • 4. Coral Builds Reefs?
      • The animal portion of the reef is called a polyp
      • The polyp absorbs calcium carbonate out of the water
      • The calcium carbonate is used to build the reef
    • 5. Reefs Corals Build
      • Corals can build three types of reefs:
        • Fringing: grows close to shore
        • Barrier: also grows close to shore but has a lagoon separating it from the shore
        • Atoll: a ring of coral that surrounds a lagoon, often grows on a submerged mountain or volcano corals/media/coral04a_240.jpg
    • 6. Coral are Cnidarians
      • Soft bodied
      • Carnivorous
      • Stinging tentacles arranged in a circle around their mouth
      • Body symmetry
      • Specialized tissues
    • 7. Cnidarians
      • Usually two life stages:
        • Polyp
        • Medusa
      • Gastrovascular cavity
        • Food is broken down here but digested intracellularly
    • 8. Cnidarians
      • Respiration and waste removal takes place through body walls
      • Nerve net
      • Some have a hydrostatic skeleton
      • Some move through jet propulsion
    • 9. Anatomy of Coral
      • The coral polyps build a calcium carbonate cup called a corallite to live in
      • Coral has stinging cells called nematocysts
    • 10. Stinging Cells
      • Nematocysts help coral catch food
      • They also help protect the coral
      • When the cell is stimulated, it releases a sharp barb
      • The barb will fire and catch the food and bring it back towards the mouth
    • 11. Coral and Zooxanthella
      • Symbiotic relationship
      • Zooxanthella is an algae that lives in the skin of coral
      • Coral provides protection
      • Zooxanthella provides food and color!
    • 12. Coral is Picky
      • Very specific habitats:
        • Temperature: 73-75  F
        • Depth: Less than 80 ft to 230 feet
        • Salinity: Normal salt levels (35ppt)
        • Light: Zooxanthellae need light to survive
        • Sedimentation: Being covered with silt interferes with photosynthesis
        • Desiccation: being exposed to air. The corals will die if exposed too long
      • Coral likes areas with lots of waves:
        • They are strong enough to withstand the pressure
        • Freshwater means more food
        • Waves remove silt
        • New water brings more oxygen
    • 13. Asexual Reproduction
      • To reproduce coral can reproduce asexually or sexually
      • Asexual reproduction in corals is called budding
      • A baby polyp will begin growing off the adult
      • When it is ready it will detach and live on its own
      • This can not start new colonies, only help the old colony grow bigger
      This is a hydra (cousin to coral) with two buds. One bud (on the right) is older than the other.
    • 14. Coral Reproduction
      • Sexual reproduction is called spawning
      • External fertilization
      • It can start new colonies
      • Sperm and eggs are released into the water column
      • The fertilized egg is then called a planula
      • The planula swims until it finds a good place to live
    • 15. A New Home
      • Corals now have a choice of where to live
      • Corals are very sensitive and are rapidly dying
      • People are trying to help by creating artificial reefs
    • 16. Arguments for Artificial Reefs
      • It can help build or rebuild a reef
      • It will increase fish populations by making new habitats
    • 17. Arguments Against Artificial Reefs
      • Moveable
      • Chemical leaking and leaching into the ocean
      • It does not increase fish populations but rather moves them to one location away from their natural habitat which makes them easier to catch