There are 3 ways to diagram the flow of energy. 1. Food Chain 2. Food Web 3. Energy Pyramid

Transcription

1 Warmup 12

2 Energy Pyramids

3 There are 3 ways to diagram the flow of energy 1. Food Chain 2. Food Web 3. Energy Pyramid

4 What can an Energy Pyramid show us that a food chain/web cannot? Energy pyramids show us the amount of energy available at each trophic level in an ecosystem.

5 Constructing an Energy Pyramid Each level of an energy pyramid represents a trophic level. Which trophic level do you think would be the base of our pyramid? -Producers Why do we start with producers? -Producers are the foundation of every ecosystem, they are the only organisms that can convert radiant energy into chemical energy through photosynthesis.

6 Base of the Pyramid (First Trophic Level) Producers

7 What is another name for a producer? Autotroph

8 Second Trophic Level Primary/First Level Consumer Producers

9 What type of consumer fits into the second level of the energy pyramid? Herbivore- they eat producers

10 Third Trophic Level Secondary Consumer Primary/First Level Consumer Producers

11 If the secondary consumer gets it s energy from the primary consumer, what type of consumer does that make it? Carnivore- it is eating another animal

12 Fourth Trophic Level Tertiary Consumer Secondary Consumer Primary/First Level Consumer Producers

13 Which direction does the energy flow in the energy pyramid? Starts with the producer, and is transferred up the trophic levels to the other organisms.

14 Transfer of Energy Tertiary Consumer Flow of Energy in the Ecosystem Secondary Consumer Primary/First Level Consumer Producers

15 Consider the shape of a pyramid: What happens to size of the layers as you go up?

16 Which layer do you think receives the most energy? Producers- they are in the first, largest level, and contain 100% of all the energy available in the ecosystem. Why do they get the most energy? Producers can make their OWN energy! Through what process? -Photosynthesis!!!!!

17 How much energy gets passed on to the next level? 10% rule If the producers have 100% of the energy and only 10% of that gets passed on, then how much energy do the primary consumers get?

18 .1% 1% 10% 100%

19 Think critically If the amount of energy decreases as you move up the energy pyramid, what does that mean about the number of organisms an ecosystem can support in each trophic level? The number of organisms in each successive trophic level decreases just as the amount energy decreases. This means that there are more producers than consumers.

20 Discussion Why does there have to be more producers than consumers in an ecosystem?

21 Let s apply some knowledge If there are 2500 producers in an ecosystem, how many primary consumers do you think the ecosystem can support? The 10% rule applies 2.5 Tertiary Cons. 25 Secondary Cons. 250 Primary Consumers 2,500 Producers

22 Day 2 Energy Pyramids Warmup 13

23 Energy Transformation All energy on Earth originates from The Sun, in what form? Radiant Energy Radiant Energy gets converted into chemical energy by? Producers/Autotrophs through photosynthesis What happens to the chemical energy?

24 Radiant Energy Chemical Energy Chemical energy is stored in plants, what eats plants? Herbivores and Omnivores, why do animals need to eat? To get energy Why?

25 Heat Energy (Digestion) Radiant Energy Chemical Energy Mechanical Energy Some energy is lost during digestion, most is converted into mechanical energy by animals. (Movement)

26 Energy Energy cannot be created or destroyed, only changed. This means that all of the energy that will ever exist in the universe already exists, it just gets changed.

27 Building an Energy Pyramid Activity