We consume sunlight, air, rain, uranium, metals, coal, oil and trees;
so it's hard to compare us to other life forms.

“Oceanic Auto·Trophs*” are only .2 percent of all biomass;
yet, per year, they produce nearly half of the world's biomass.
[ *: e.g. diatoms, who live off inorganics and sunlight ]

Some global producers of biomass in order of productivity rates a
[ in “kilo·grams of biomass” per square·meter per year ]
2.5 swamps and marshes
2 tropical rain forests
2 algal beds and reefs
1.8 river estuaries
1.2 temperate forests
.6 cultivated lands
.2 deserts and tundras