Essay: How is energy flow though an ecosystem related to trophic structure? i need this by tommorow please :)

In order to answer this, you need to know exactly what a
trophic level is.  A trophic level refers to each step of the energy pyramid.  Producers
are located at the bottom level and each consecutive level is made up of different
levels of consumers.  All energy comes begins at the bottom of the pyramid.  As you go
up each step you lose 10% of the energy.

In approaching an
essay on this topic, I would consider writing a paragraph for each individual pyramid
level.  Describe what organisms you find there and what is happening to the energy at
that stage (are they making it, consuming it, or both).