Depiction of the adenine–thymine Watson–Crick base pair
An energy pyramid illustrates how much energy is needed as it flows upward to support the next trophic level. Only about 10% of the energy transferred between each trophic level is converted to biomass.
Humans and their livestock represent 96% of all mammals on earth in terms of biomass, whereas all wild mammals represent only 4%.
Globally, terrestrial and oceanic habitats produce a similar amount of new biomass each year (56.4 billion tonnes C terrestrial and 48.5 billion tonnes C oceanic).
Grasses, trees and shrubs have a much higher biomass than the animals that consume them
Antarctic krill form one of the largest biomasses of any individual animal species.<ref name="NE97">{{cite book | vauthors = Nicol S, Endo Y |url= |title=Fisheries Technical Paper 367: Krill Fisheries of the World |publisher=FAO |year=1997}}</ref>

The total number of DNA base pairs on Earth, as a possible approximation of global biodiversity, is estimated at 5.3, and weighs 50 billion tonnes.

- Biomass (ecology)

In comparison, the total mass of the biosphere has been estimated to be as much as 4 TtC (trillion tons of carbon).

- Base pair
Depiction of the adenine–thymine Watson–Crick base pair

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