Ecosystem Dynamics

What do you call of the position of an organism in each level of a food chain?

• pyramid

• ecosystem dynamics

• trophic level

• food chain

What is used to describe a competition between two different species?

• Interspecific

• tertiary consumer

• Intraspecific

• secondary consumer

How much energy is transferred from one trophic level to another?

• 100%

• 50%

• 30%

• 10%

The transferring of energy in the form of food is called ________.

• trophic level

• prey

• food chain

• predator

The total number of organism at each trophic level in the food chain is known as _____.

• efficiency

• pyramid of numbers

• food web

• biomass

It is the interconnection of food chains and represents of what eats what in an ecological community.

• food pyramid

• food chain

• food transfer

• food web

In calculating the efficiency of biomass transfer from one trophic level to another we need to follow this equation.

• efficiency equals biomass transferred to the next level multiply to biomass that was available at the previous level divided by 100

• efficiency equals biomass transferred to the next level less to the biomass that was available at the previous level multiply by 100

• efficiency equals biomass transferred to the next level divided by the biomass that was available at the previous level divided by 100

• efficiency equals biomass transferred to the next level divided by the biomass that was available at the previous level multiply by 100

Identify the efficiency between the snail (ex. 1000 J) & frog (ex. 100J)

• 10.5 %

• 20 %

• 10 %

• 20.5 %

A type of nutrition where organisms get their nutrients from dead organic matter is called ________.

How many food chains are there in this food web?

• 6

• 7

• 8

• 9