Producer
Most lakes (but few ponds) are very deep so not enough light reaches to support the primary productivity. Which makes this zone depend on its calories by the drifting down of organic matter from the littoral and limnetic zone.

Consumer 
This zone is mainly inhabited by primary consumers that are either attached to or crawl along the rocks at the bottom of the lake or pond such animals are called benthos.

This zone is much colder and denser than the other two. Little light penetrates all the way through the limnetic zone into the profundal zone. The fauna are heterotrophs, meaning that they eat dead organisms and use oxygen for cellular respiration.


(http://www.ucmp.berkeley.edu/glossary/gloss5/biome/aquatic.html)