Ch. 2 Energy Flow in Ecosytems

By Ellen Dugan 04 Feb 19:27
10 slides
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REVIEWING ENERGY ROLESPRODUCERS
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REVIEWING ENERGY ROLESCONSUMERS
There are 3 types of consumers:
LATIN ROOT "vorare" means to eat
HERBIVORES - consumers that eat only plants (think herba means grass or herb in Latin)
CARNIVORE - eat only animals -(carnis is Latin for flesh) - some carnivores are scavengers . Scavengers feed on bodies of dead organisms (like a vulture).
OMNIVORE - Omni mean all - so they eat both herbs and animals.
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REVIEWING ENERGY ROLESDECOMPOSERS
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FOOD CHAINS
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First-Level and Second-Level ConsumersIn a food chain, the producer ALWAYS comes first. Then you have a first-level consumer such as the giraffe in the video. The first level consumer eats the producer directly. Then you have the second-level consumer. That was the lion. The second level consumer doesn't eat the producer directly, but eats the first-level consumer.
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A little music to help you remember....
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Food WebA food web is a little more complicated. A food chain shows one possible path. A food web consists of many overlapping food chains in an ecosystem.
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UNDERSTANDING FOOD WEBS
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ENERGY PYRAMIDSA diagram called an energy pyramid shows the amount of energy that moves from one feeding level to another in a food web. The most energy available is at the producer level. At each level there is less energy that at the level below.
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Slides in Ch. 2 Energy Flow in Ecosytems

PRODUCERS
CONSUMERS There are 3 types of consumers: LATIN ROOT "vorare" means to eat HERBIVORES - consumers that eat only plants (think herba means grass or herb in Latin) CARNIVORE - eat only animals -(carnis is Latin for flesh) - some carnivores are scavengers . Scavengers feed on bodies of dead organisms (like a vulture). OMNIVORE - Omni mean all - so they eat both herbs and animals.
In a food chain, the producer ALWAYS comes first. Then you have a first-level consumer such as the giraffe in the video. The first level consumer eats the producer directly. Then you have the second-level consumer. That was the lion. The second level consumer doesn't eat the producer directly, but eats the first-level consumer.
A food web is a little more complicated. A food chain shows one possible path. A food web consists of many overlapping food chains in an ecosystem.
A diagram called an energy pyramid shows the amount of energy that moves from one feeding level to another in a food web. The most energy available is at the producer level. At each level there is less energy that at the level below.
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