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Ecosystem
A community of living organisms interacting with one another and their non-living environment
Sun
The source from where all living things get their energy
Food Chain
Energy flow from one organism to another
Producer
Organism that makes their own food with energy from the Sun
Primary Consumer
Eats a producer for energy
Secondary Consumer
Eats a primary consumer for energy
Decomposer
Breaks down dead, decaying organisms for energy
Food Web
A complex network of interconnected food chains
Energy Pyramid
A diagram that shows how energy is passed along among organisms in an ecosystem
Trophic Level
Each level in an energy pyramid
Symbiosis
Relationship in which at least one species will benefit
Mutualism
Relationship in which both species benefit
Commensalism
Relationship in which one organism benefits and the other is unaffected
Parasitism
Relationship in which one organism benefits and the other is harmed
Population Size
the number of organisms that make up the population
Population Density
the number of organisms of the same species in a specific area
Population Dispersion
how spread individuals in an ecosystem are
Immigration
movement of members into the population
Emigration
movement of members out of the population
Limiting Factor
a factor that limits growth of a population
Carrying Capacity
the number of individuals an environment can support
Succession
the process by which an ecosystem community evolves over time
Climate Change
long-term changes in Earth's weather patterns