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Ecology
Interdependence
Key Theme in EcologyCrucial interactions occur
between organisms and the living and nonliving
environment.
Levels of Organization
Why is the amount of sunlight important to
animals in an ecosystem?
Ecosystems
Shaped by Biotic and Abiotic Factors
Biotic Factors• Community interactions:–Competition• Competitive Exclusion Principle
–Predation–Symbiosis•Mutualism• Commensalism• Parisitism
Abiotic Factors• Climate• Temperature• Precipitation• Sunlight• Geographic distribution• Soil• Elevation
Survival
Optimal range Tolerance limitsAcclimation (not adaptation)
Internal controlConformers (cold-blooded )
Regulators (warm-blooded)
Escape Short/long term DormancyMigration
Habitat vs. Niche
o Generalisto Specialist
Why do different species never occupy
exactly the same niche?
A small rodent species and a bird species are
adapted to cold temperatures. How might each species
survive a major temperature increase?
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