In most ecosystems, the sun is the source of energy that producers use to create energy. But in a few rare cases—such as ecosystems found in rocks deep beneath the ground—bacterial producers ...

Peter Yodzis, Energy Flow and the Vertical Structure of Real Ecosystems, Oecologia, Vol. 65, No. 1 (1984), pp. 86-88 ...

Learn about energy transfer in ecosystems and pyramids of biomass, energy and numbers. BBC Bitesize Scotland revision for SQA National 5 Biology.

Photosynthetically fixed energy ultimately supports the great diversity of species that inhabit the world's ecosystems. Globally, natural terrestrial ecosystems fixed about $2800\cdot 10^{18}$ joules ...