Where does all of the energy in an ecosystem ultimately come from? Please help

Question

anonymous · Answer

This would defiantly be the sun, organisms like plants are used to harness that energy.

anonymous · Answer

Thanks :)

anonymous · Answer

Np, btw I love fans & medals. :)

anonymous · Answer

btw I medaled and fanned you XD

anonymous · Answer

Thnxs! :)

alistairgarratt · Answer

But don't forget the organisms living around geothermal vents at the bottom of the oceans..thousands of meters below the surface, the energy source comes not from splitting water to oxygen and hydrogen (photosynthesis) but other compounds, e.g. hydrogen sulphide. This ecosystem is established without the sun's energy amd may relate more to the earlier ecosystems in our planet's history.

anonymous · Answer

Yeah that's true. But I don't think that's what the question is asking for.