Biodiversity
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Transcript of Biodiversity
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Biodiversity
• The variety of species living within an ecosystem
• What is an ecosystem?
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Ecosystems
• Ecosystems consist of a given area’s physical features (_____ factors) and organisms (______ factors)
• Organisms that live together in an ecosystem are called a __________
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Population• What is a population?
– A group of organisms that all belong to the same species and live in a given area
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Cause and EffectScenario #1:
A big boat that carries oil from Saudi Arabia to the United States hits a rock near the coast of Redondo Beach and spills a million barrels of oil into the ocean. How does this impact the environment?
Scenario #2:You and your friend went camping in Yosemite and accidentally started a forest fire that burnt down a square mile of trees. How does this impact the environment?
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• When you alter an environment in any way, you alter everything that is somehow attached. Everything in an ecosystem is connected!
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Producers & Consumers
Shrimp
Sheep
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Decomposers• Which one is a decomposer?
Why are decomposers important for a healthy
ecosystem?
The Earth would be one big pileof dead things!
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Food chain• Animals and plants are
connected through simple relationships called food chains.
• Can you describe a food chain that you fit into?
• Are humans ever in the middle or bottom of a food chain? Consumer
Consumer
Consumer
Consumer
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Mr. Haas’ Food Chain
PlanktonSardines
Tuna
Shark
The Best Teacher EverConsumer
Consumer
Consumer
Consumer
Producer
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Food Webs
• Nature really more like a web, not a chain.
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RelationshipsCan’t we all just be friends?
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CompetitionTwo or more organisms compete for a limited
resource
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PredationOne species eats the other species
(predator-prey)
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Symbiosis = living together
Examples:1. Commensalism2. Mutualism3. Parasitism
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CommensalismOne species benefits and the other species is
neither harmed or benefited
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Mutualism
Both species benefit
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ParasitismOne organism benefits at the expense of the other
organism
Swimmer’s ItchCrab Parasite