Asked by Anonymous

Cave ecosystems are characterized by extremely low light levels. What role does photosynthesis play in a cave ecosystem?

1: Photosynthesis is essential because it provides the original energy source for all food chains in this ecosystem.
2: photosynthesis is essential only for those organisms that must travel outside of this ecosystem to acquire food.*
3: photosynthesis is optional because some organisms use sources inside the outside of this ecosystem for food.
4: photosynthesis is not needed since organisms have adapted to live in the dark where photosynthesis cannot take place.

Answers

Answered by Ms. Sue
I disagree.

http://science.howstuffworks.com/life/biology-fields/cave-biology3.htm
Answered by Anonymous
Oh. So is it 1?
Answered by Ms. Sue
Yes.
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