Trophic Levels Definition - each step in a food chain or food web

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Presentation transcript:

Trophic Levels Definition - each step in a food chain or food web Producers make up 1st trophic level Consumers make up the other trophic levels and rely on the level below for energy

Ecological Pyramid Definition – a diagram that shows the relative amounts of energy or matter contained within each trophic level There are 3 types of types of pyramids Energy Pyramid Biomass Pyramid Pyramid of Numbers

Energy Pyramid Shows the amount of energy that flows through the trophic levels There is no limit to the number of trophic levels in a food web/chain BUT, as you travel from 1 level to the next, only 10% of the energy is transferred Most organisms use the energy they have to support their own life processes (respiration, movement, reproduction) and rest is lost as heat

Energy Pyramid Example

Biomass Pyramid Biomass – the total amount of living tissue within a trophic level A biomass pyramid shows the amount of potential food available for each trophic level in an ecosystem

Pyramid of Numbers Shows the relative number of individual organisms at each trophic level May appear the same as the biomass pyramid but not always the case Ex) In forests there are fewer producers than consumers A Tree would have a large amount of energy/biomass, but the many insects that live in the tree would have greater numbers, but less biomass