Biodiversity
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Biodiversity • The variety of species living within an ecosystem • What is an ecosystem?
description
Biodiversity. The variety of species living within an ecosystem What is an ecosystem?. Ecosystems. Ecosystems consist of a given area’s physical features ( _____ factors ) and organisms ( ______ factors ) Organisms that live together in an ecosystem are called a __________. Population. - PowerPoint PPT Presentation
Transcript of Biodiversity
Biodiversity
• The variety of species living within an ecosystem
• What is an ecosystem?
Ecosystems
• Ecosystems consist of a given area’s physical features (_____ factors) and organisms (______ factors)
• Organisms that live together in an ecosystem are called a __________
Population• What is a population?
– A group of organisms that all belong to the same species and live in a given area
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?
• When you alter an environment in any way, you alter everything that is somehow attached. Everything in an ecosystem is connected!
Producers & Consumers
Shrimp
Sheep
Decomposers• Which one is a decomposer?
Why are decomposers important for a healthy
ecosystem?
The Earth would be one big pileof dead things!
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
Mr. Haas’ Food Chain
PlanktonSardines
Tuna
Shark
The Best Teacher EverConsumer
Consumer
Consumer
Consumer
Producer
Food Webs
• Nature really more like a web, not a chain.
RelationshipsCan’t we all just be friends?
CompetitionTwo or more organisms compete for a limited
resource
PredationOne species eats the other species
(predator-prey)
Symbiosis = living together
Examples:1. Commensalism2. Mutualism3. Parasitism
CommensalismOne species benefits and the other species is
neither harmed or benefited
Mutualism
Both species benefit
ParasitismOne organism benefits at the expense of the other
organism
Swimmer’s ItchCrab Parasite
