The Definition of...
TROPHIC- relating to nutrition: relating to the nutritive value of food
the system of trophic levels which describes the position that an organism occupies
Well the trophic model is like the pyramid (Food Chain).But the difference is that trophic model's change every time you go to a different ecosystem.(Ecosystem Definition - http://dictionary.reference.com/browse/ecosystem)Pristine Ecosystems have a wine shaped trophic model and Near - Pristine Ecosystems have a upside down wine shaped trophic model. Human affected ecosystems have a triangle trophic model.
The first trophic leval
I would assume it to be the amount of mass in a specific trophic level. Thus, the trophic mass pyramid.
Scavengers are on every trophic level
first
Mosquitos can be of many different trophic levels, as they consume the blood of animals from multiple trophic levels.
Trophic level
they are tertiary consumers. the first trophic level.
Third trophic level. It eats insects.
Their trophic level is primary consumer.
Trophic level efficiency is the ratio of production of one trophic level to the production of the next lower trophic level. This efficiency is never high.