Energy Flow in Ecosystems All Organisms Need Energy

All Organisms Need Energy To Survive! • Some organisms get energy by making it

All Organisms Need Energy To Survive! • Some organisms get energy from other organisms

Autotrophs • Another word for autotroph is producer • Examples of autotrophs include grass,

What Happens to all the Energy Made by Autotrophs/Producers? • They use most of

Heterotrophs • Another word for heterotroph is consumer • Examples of heterotrophs include dogs,

Heterotrophs • Primary Consumers only eat plants (herbivores) • Secondary Consumers eat primary consumers

What Happens to all the Energy Consumed by Heterotrophs? • They use most of

Food Chains • Food chains show the transfer of energy from the sun to

Food Webs • Very rarely in nature is the transfer of energy in an

Energy Pyramids • An energy pyramid is yet another way of showing the transfer

Try this • Use as many words as you can to describe each of

Try these • Use as many words as you can to describe each of

Reading When you are done, raise your hand I will come sign your paper.

DYL Looking at the below food chain, who is the producer? Who is the

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Energy Flow in Ecosystems

All Organisms Need Energy To Survive! • Some organisms get energy by making it themselves • These organisms are called autotrophs

All Organisms Need Energy To Survive! • Some organisms get energy from other organisms • These organisms are called heterotrophs

Autotrophs • Another word for autotroph is producer • Examples of autotrophs include grass, algae and trees • Autotrophs make their own energy (food) by using the sun’s energy to convert water and carbon dioxide into a form of food that they can use called glucose • This process is called photosynthesis

What Happens to all the Energy Made by Autotrophs/Producers? • They use most of it to carry out their functions (growing, reproducing, etc. ) • Some of it is lost in the atmosphere as heat • Only 10% of the energy is available for the organisms that eat them

Heterotrophs • Another word for heterotroph is consumer • Examples of heterotrophs include dogs, fish, elephants, and mushrooms • Heterotrophs get their energy by consuming/eating other organisms • There are many different types of heterotrophs/consumers…

Heterotrophs • Primary Consumers only eat plants (herbivores) • Secondary Consumers eat primary consumers (carnivores/omnivores) • Tertiary Consumers eat secondary consumers (carnivores/omnivores) • Scavengers feed off of dead consumers • Decomposers feed by breaking down organic matter from dead organisms

What Happens to all the Energy Consumed by Heterotrophs? • They use most of it to carry out their functions (growing, reproducing, etc. ) • Some of it is lost in the atmosphere as heat • Only 10% of the energy is available for the organisms that eats them

Food Chains • Food chains show the transfer of energy from the sun to producer to consumer • Arrows point in the direction that the energy is going 9

Food Webs • Very rarely in nature is the transfer of energy in an ecosystem as simple as a single food chain • Food webs are interconnected food chains that show feeding relationships of many organisms in an ecosystem 10

Food Webs 11

Energy Pyramids • An energy pyramid is yet another way of showing the transfer of energy in an ecosystem • Each level is called a trophic level • They also show – How the amount of available energy decreases for higher consumers – That it takes a large number of producers to support a small number of tertiary consumers

Energy Pyramids

Try this • Use as many words as you can to describe each of the below organisms.

Try these • Use as many words as you can to describe each of the below organisms.

Reading When you are done, raise your hand I will come sign your paper.

DYL Looking at the below food chain, who is the producer? Who is the secondary consumer? Who is a carnivore? Who is a heterotroph?