Ecosystems Review

• ​An ecosystem Includes all living and non-living parts of the environment as well as the interactions among them.

• ​Biotic factors are living parts of an ecosystem which includes remains and wastes.

  Non-living parts of an ecosystem which includes light, temperature, weather, soil and water

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Important Information

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• ​Limiting Factors are conditions of the environment that limit the growth of a species.

• Because of these limiting factors, each ecosystem has a finite capacity for growth connected to its carrying capacity.

Limiting Factors

• First-order consumers feed directly on producers

• Second-order consumer feed on first-order consumers

• Third-order consumer feeds on second-order consumers

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Food Chains and Food Webs

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• Decomposers are organisms that gets energy by breaking down the remains of dead organisms and the wastes of living things.

• ​Producers make their own food through photosynthesis.

• Ecosystems get all energy from the sun! ​

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Food Chains and Food Webs

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• Animals coexist when they live in the same habitat but rely on different resources

  Mutualism is a relationship in which both species benefit

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Animal Relationships​

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• Commensalism is a relationship where one species benefits without benefiting or harming the other species

• Parasitism is a relationship between a parasite and its host where one species benefits and the other is harmed.

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​Animal Relationships