Trophic Levels and Food Chain
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Define Autotroph
An organism that can produce its own food using light, water, carbon dioxide, or other chemicals.
Define Heterotroph
An organism that eats other plants or animals for energy and nutrients.
Define Keystone Species
An organism that helps define an entire ecosystem.
Define Trophic Cascade
An ecological phenomenon triggered by the addition or removal of top predators and involving reciprocal changes in the relative populations of predator and prey through a food chain.
What are Trophic Levels?
The positions of organisms on the food chain.
What’s the difference between a food web and a trophic cascade diagram?
Food webs show what eats what while trophic Cascade diagrams show how each species affects the other.
How do you identify a species trophic level in a food web?
How does a species indirectly positively affect another species?
If it negatively affects a species that negatively affects another
How does a species indirectly negatively affect another species?
If it indirectly positively affects a species that negatively affects another.
Name the trophic levels.
Primary producers (plants), primary consumers (herbivores), secondary consumers, tertiary consumers, and detritivores (decomposers).