3) Food Webs and Energy Pyramids

What does an energy pyramid show?

how energy is distributed in a community

What shows how energy is distributed in a community

an energy pyramid

What do food webs show?

the feeding relationships of organisms in a community

What shows the feeding relationships of organisms in a community?

food webs

What is a community?

a group of different species in the same area

What is a group of different species in the same area?

a community

An energy pyramid is a visual representation showing how energy does what?

decreases as you move up the food chain

What visual representation shows how energy decreases as you move up the food chain?

an energy pyramid

Organisms in a community may

compete with one another for energy

What may compete one another for energy

organisms in a community

What do all food webs begin with?

producers

What all begins with producers

food webs

Producers, such as plants or bacteria, use what?

photosynthesis or chemosynthesis to make own food

What uses photosynthesis or chemosynthesis to make their own food?

producers such as plants or bacteria

Producers are eaten by what?

consumers

What are eaten by consumers

producers

Consumers may be

herbivores, carnivores, or omnivores

What may be herbivores, carnivores, or omnivores?

consumers

Why are herbivores called primary consumers?

because they only eat producers

_ are called - because they only eat producers.

herbivores are called primary consumers

What do carnivores eat?

other consumers

What eats other consumers?

carnivores

What are called secondary consumers?

carnivores that eat herbivores

What are carnivores that eat herbivores called?

secondary consumers

What are omnivores?

types of consumers that eat both producers and consumers

What are types of consumers that eat both producers and consumers?

omnivores

While feeding relationships are shown in a food web,

the flow of energy through a community is shown in an energy pyramid

While the flow of energy through a community is shown in an energy pyramid,

feeding relationships are shown in a food web

What is an energy pyramid?

a diagram that compares energy gained by producers, primary consumers, and other organisms

What is a diagram that compares energy gained by producers, primary consumers, and other organisms?

an energy pyramid

Each division of the pyramid represents what?

a different trophic level

What represents a different trophic level?

Each division of the pyramid

What gains the greatest amount of energy?

producers because they produce their own food

Because producers produce their own food, _

producers gain the greatest amount of energy

Each trophic level receives much more or less than the level below it?

less

Each trophic level receives much less energy than

the level below it

When an organism eats food,

a small amount of the food’s energy is incorporates into the organism’s biomass; the remaining energy is lost as heat

A small amount of the food’s energy is incorporated into the organism’s biomass; the remaining energy is lost as heat when?

an organism eats food

The dissipation of energy between trophic levels may be as much as 90 percent, meaning that

only 10 percent of the energy at one trophic level can be transferred to the next

Only 10 percent of the energy at one trophic level can be transferred to the next, meaning that

the dissipation of energy between trophic levels may be as much as 90 percent

Because energy is lost at each stage of a food chain and energy pyramid,

the longer than chain is, the more energy is lost overall

The longer a food chain is, the more energy is lost overall because

energy is lost at each stage and energy pyramid