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201 Trophic Levels

TermDefinition
Photosynthesis - using energy from the sun to convert water and carbon dioxide into sugars
Producers - Organisms that make their own food All other organisms depend in them for food AKA autotrophs
Consumers - cannot make their own food must eat other organisms AKA heterotrophs
Primary consumers - animals that feed directly on producers AKA herbivores example: cows TIP: they are the second level in an energy pyramid
Secondary consumers - eat primary consumers
tertiary consumers - eat secondary consumers
quaternary consumers - eat tertiary consumers
carnivores - Consumers that eat only animals example: lions
Omnivores - eat both plants and animals
trophic level - Each step in a food chain or food web the producers are one level primary consumers are the next etc. AKA feeding level
decomposers - Organisms that break down the dead remains of other organisms they return the matter to the environment related: detritivores, scavengers
Food chains - Shows some of the feeding relationships in an ecosystem
Food webs - A diagram that shows many feeding relationships Can be thought of as representing several food chains
10% rule - Only 10% of the total energy produced at each trophic level is available to the next level 90% is lost as heat
Biomass - total amount of living tissue within a given trophic level Imagine taking all the trees, grass, algae, etc. and weighing it and that would represent the biomass at the producer level
energy pyramid - A diagram that shows the amount of energy that moves from one feeding level to another in a food web
Arrows in a food chain or web - Represents the direction of the flow of matter and energy TIP: point to the mouth or the organism doing the eating
organic compounds - contain carbon
inorganic compounds - do not contain carbon (CO2 is classified as inorganic)
Energy-transferring step - The arrows on a food chain or web
Created by: Mr. Ford
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