Humid Tropics: Part 2
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What is Coral?
marine colonial polyp characterized by a calcareous skeleton
Highest species richness of coral reefs
Indo Pacific - 500 species of coral
Highest endemism in coral reefs
Zooxanthellae and symbiotic relationship with coral
- -yellow and brown algae
- -has a symbiotic relationship with coral.
- 1. Coral Polyp
- -Provide Nitrogen and Carbon Dioxide
- 2. Zooxanthellae
- -provides oxygen
- -Jellyfish, sea anemone, corals
- -stinging cells called nematocysts
- -radially symmetric
Difference between Hard and soft corals
- 1.Hard corals
- -6 tentacles
- -out at night
- 2. Soft corals
- -8 tentacles
- -out during day
- -like fans
- -deer thorns
- -Brain coral
- -circular polyps
- -turban like
- -fire/ yellow coral
- -fan like
- -buffers to land
- -food and subsistence,
What proportion of coral has been destroyed and degraded?
- -1/10 destroyed
- -1/3 degraded.
- -¾ degraded in 50 years
What is the aesthetic value of coral?
$375 billion annually
Three things that are damaging coral
- 1. Coral bleaching due to temperature increases
- 2. man-made causes from forestry,
- 3. dynamite and cyanide fishing
- -75% biomass plants,
- -single cell plant
- -brown algae, green algae, coralline, halimeda, penicullus
primitive plants with no true leaves, stems, or roots.
- -contributes calcium carbonate
- 1. halimedal
- - most of what makes white sand
- 2. udotea
- - indicator of pollution, signifies polluted
- -green algae
What are seagrasses?
Land plants that have recolonized in the ocean.
Why are seagrasses important?
- 1. Stabilizing the sea bottom
- 2.Providing food and habitat for other marine organisms
- 3. Maintaining water quality
- 4. Supporting local economies
What would you like to do?
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