Rock Platforms: Subtidal Zone
The subtidal zone generally remains submerged except at extreme low tides.
For each physical factor presented below, indicate which of them create challenges for organisms in the subtidal zone by selecting ‘Yes’ or ‘No’:
Light
Yes
No
try again
Yes, there is less and less light available the deeper down you go. Water absorbs light.
In fact, light is seriously limits photosynthesis at as little as 1 metre deep. Try again.
Macrocystis from below. Photograph courtesy of Gerry Kraft.