Ecosystem and Organism Interactions

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Ecosystem Basics: Ecosystem

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All living and nonliving things in an area (e.g., plants, animals, rocks, soil, water, air)

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Organism Interactions: Competition

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Organisms fighting over a resource like food or shelter; limits population size

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Organism Interactions: Commensalism

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Relationship that benefits one organism and doesn't impact the other (e.g., birds nest in trees)

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Objectives: Environmental Concepts

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Describe environmental concepts and processes

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Hyenas are skilled scavengers and adept at hunting smaller prey like gazelles.

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Scavenging behavior provides a secondary food source for hyenas.

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Hyenas' nocturnal activity reduces direct competition with diurnal lions.

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Hyenas' adaptability to dense vegetation reduces competition with lions.

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Symbiosis: Example of Lichen

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Fungi living with algae

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Organism Interactions: Example of Mutualism

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Coral reef

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Shells and tough outer skin can prevent drying out during low tides.

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Spiral wrack is a type of seaweed that curls up and secretes mucus to retain water.

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Estuaries have high plant growth due to nutrient-rich sediments.

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Mangrove trees adapt to a mix of fresh and salt water.