Yes, they are producers because they need to eat. They feed on algae left on rocks or on the ground.
Producers
Though it might seem odd, lichens are actually both producers and decomposers.
Producers
producers
produce!
All plants are producers and the only producers in a desert.
All plants are producers and the only producers in a desert.
animals are consumers and plants are producers.
The producers.
They are producers.
Producers.