BBC3 年
Pyramids of number and biomass
They can represent either numbers of a particular ... If we use biomass, however, we get a regularly stepped pyramid because one tree has loads of biomass and it's a more useful visualisation ...
BBC3 年
Pyramids of number and biomass
They can represent either numbers of a particular ... If we use biomass, however, we get a regularly stepped pyramid because one tree has loads of biomass and it's a more useful visualisation ...