Biomes cannot be productive. They just sit there and take up space. Does that sound very productive, not really, and why in the estuaries do you care anyway? When will you ever need to use that information? That's right never.
horizontal
tundra is the least productive biome.
Tropical rain forest
tundra
Tundra
TRopical rain forest :]
Tropical Rain Forest
Coral Reefs. For more info, look it up yourself. :D
There are two: the tropical rainforest and the temperate rain forest.
Estuaries are the most productive ecosystems.
Plain area are most productive for farmaers
the aquatic biome.