Cow Grass Herbivoir Primary Consumer 2^nd Cow Pies Field 

Shrimp Plankton & Detritus Decomposer 2^nd Detritus Marine 

Lettuce Sunlight Photosynthesis Primary Producer 1^st GPP/NPP Field

Grass Sunlight Photosynthesis Primary Producer 1^st GPP/NPP Field

Plankton Detritus (waste) Decomposer 1^st GPP/NPP Marine

Mushroom Cow Pies Chemosynthesis Decomposer 1^st Nutrients Ground

NPP: what we eat, what the cow eats

GPP: what the lettuce uses to grow, what the grass uses to grow