Ecology. Interdependence Key Theme in Ecology Crucial interactions occur between organisms and the living and nonliving environment.

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Presentation transcript:

Ecology

Interdependence Key Theme in Ecology Crucial 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 limits  Acclimation (not adaptation)

 Internal control  Conformers (cold-blooded )  Regulators (warm-blooded)  Escape Short/long term  Dormancy  Migration

Habitat vs. Niche o Generalist o 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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