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How do marine organisms use light?
Light penetration in the photic zone
oceanexplorer.noaa.gov
What do you notice?What do you wonder?
oceanexplorer.noaa.gov
Open water Coastal water
Light penetration in the photic zone
oceanexplorer.noaa.gov
Red light penetrates water the least
Blue and green light penetrate water the most
How do marine organisms use light?
• Sunlight is needed for photosynthesis (primary production to support food webs)
• Light for animals to see– Finding food– Avoiding predators– Finding mates
Why is water blue?Or, why is a red fish red?
Why is green algae green?Why is a purple urchin purple?
Why is water blue?
What are the wavelengths of light?
sun
Why is water blue?
Which wavelengths of light can we see?
sun
X infraredXultraviolet
Why is water blue?
Which wavelengths of light can we see?
sun
Why is water blue?
sun
Blue water absorbs all light waves except blue
Why is a red fish red?
Why is a red fish red?
Why is green algae green?
Why is a purple urchin purple?
Not all light penetrates water
Blue Planet0:00 - 5:55
Light Zones
Daylight0-200m
Twilight200-1000m
Midnight1000m +
oceanexplorer.noaa.gov
Remember why a red fish looks red?
oceanexplorer.noaa.gov
Remember why a red fish looks red?
What does a red fish look like here?
Deep sea dive!
Time to put on your masks!
Adaptations to light in water
What do you
notice?
oceanexplorer.noaa.gov
Adaptations to light in water
itresourcing.com.au
Countershading
oceanexplorer.noaa.gov
Adaptations to light in water
Bioluminescence
Bioluminescence
oceanexplorer.noaa.gov
Communication
Blue Planet14:30-15:57 & 17:55-18:15
Bioluminescence
oceanexplorer.noaa.gov
Communication
Locating food
Blue Planet16:00-17:16
Bioluminescence
oceanexplorer.noaa.gov
Communication
Locating food
Attracting prey
Blue Planet12:17 - 14:31
Bioluminescence
oceanexplorer.noaa.gov
Communication
Locating food
Attracting prey
Camouflage
Blue Planet5:55 - 7:35
Bioluminescence
Communication
Locating food
Attracting prey
Camouflage
Mimicry
flmnh.ufl.edu
fishbase.org
Cookie cutter shark
Bioluminescence
Communication
Locating food
Attracting prey
Camouflage
Mimicry
flmnh.ufl.edu
Bioluminescence
oceanexplorer.noaa.gov
Communication
Locating food
Attracting prey
Camouflage
Mimicry
Self-defense
Blue Planet17:18-17:54
Deep Sea Videos
http://blogs.discovery.com/deep_sea_news/2008/10/the-27-best--16.html
*extra time The Blue Planet: The Deep, 8:00+
