Slides in Ch. 2 Energy Flow in Ecosytems
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.