ecology unit topic 1: relationships in ecosystems
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Ecology UnitTopic 1: Relationships in Ecosystems
Ecosystem = All the living organisms in an area and their non-living environment
The Study of EcologyEcology = the study of how organisms interact with the environment
Abiotic and Biotic Definitions
abiotic factors = non-living components of the environment Ex: rocks, water, mineralsEx: physical factors such as temperature, pH, weather
biotic factors= living or once-living biological components Ex: trees, people, animals, bacteria
Organism:– A living thing such as a
plant, animal, bacteriaPopulation:– Group of individuals
of the same species in the same place and time.
Community:– 2 or more populations
in an area• Examples:
– Penguins and walruses in Antarctica
– Elephants and zebras in African savannah
– Polar bears and seals in the Arctic
Organization of the Living World
Differences in Ecosystems• Ecosystems can vary in size and in their biotic and
abiotic features.• Large Ecosystems: A coniferous forest or coral reef • Small Ecosystems: A beaver pond or rotting log
Brainstorm with a partner:• What biotic and abiotic features do you see in each
ecosystem?
Coniferous Forest Rotting Log
Sustainable Ecosystems• Ecosystems that are capable
of being maintained through natural processes are called sustainable
• Other ecosystems are strongly influenced by human actions and require regular management
Brainstorm with a partner:• What are some examples of
human-made ecosystems?
Factors Affecting EcosystemsExamples of Natural Events Affecting Ecosystems:
Examples of Human Events Affecting Ecosystems:
Can you add to your list and think of some other examples?
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