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autotroph
organism that produces its own food
primary producer
organisms that can create their own food using photo or chemosynthesis
photosynthesis
the process in which plants use sunlight to create their own food
heterotroph
organisms that gain energy + nutrients by consuming other organisms
consumer
organisms that gain energy by eating other organisms
food web
network of chains within an ecosystem
trophic level
indicator of an organism’s position within a food chain
ecological pyramid
diagram that shows distribution of energy in an ecosystem
biomass
total quantity of living organisms in an ecosystem
phytoplankton
microscopic marine algae
detritus
non-living organic matter
