What the source of all energy in an ecosystem?

Question

What the source of all energy in an ecosystem?

Answer 1

In most ecosystems it is the sun. However there are a few that are powered by geothermal energy. Here I am thinking of the hydrothermal-vent ecosystems discovered at the bottom of the ocean.

Answer 2

The Sun

Answer 3

It is THE SUN. Sun is the source, its energy is taken and converted by producers which are eaten by consumers.

Plants are the major producers which produce food and energy by using sun's energy and this is eaten by us and animals who are primary consumers. The whole food system in the ecology depends on the energy from the sun.

Answer 4

fusion reaction from G2 Sun.

Answer 5

Most all comes from the oxidation of Corbin . This produces CO2.