Chapter 13.6 Flashcards
what does an energy pyramid show?
the distribution of energy among trophic levels.
what do pyramids model?
the distribution of energy and matter in an ecosystem.
what do energy pyramids compare?
energy used by producers and other organisms on trophic levels.
what is lost between each tier of an energy pyramid?
energy
how much energy is lost between each tier of an energy pyramid?
90%
where does the energy lost go?
in the atmosphere as heat.
what percent of the energy is actually transferred from trophic level to trophic level?
what is this rule called?
10%
The 10% Rule
what do other pyramid models illustrate?
an ecosystem’s biomass and distribution of organisms.
what is biomass?
the measure of the total dry mass of organisms in a giving area.
what does a pyramid of numbers show?
the numbers of individual organisms at each trophic level in an ecosystem.
what are a vast number of producers required to do?
support even a few top level consumers.
