Name: ____________________________________________________ Date: _____________ Period: ____
Guided Notes: Energy Flow in Ecosystems
All Organisms Need Energy To Survive!
· Some organisms get energy ____________ __________________________________
· These organisms are called ____________
· Some organisms get energy ____________ __________________________________
· These organisms are called ____________
Autotrophs
· Another word for autotroph is __________
· Examples of autotrophs include ________ __________________________________
· Autotrophs make their own energy (food) by using the _________ energy to convert __________________________________ into a form of food that they can use called ____________
· This process is called _________________
What Happens to all the Energy Made by Autotrophs/Producers?
· They use most of it to ________________ ____________________________________________________________________
· Some of it is lost in the atmosphere as ____________
· Only ________ of the energy is available for the organisms that eat them!
Heterotrophs
· Another word for heterotroph is ________
· Examples of heterotrophs include _______ __________________________________
· Heterotrophs get their energy by ________ __________________________________
· There are many different types of heterotrophs/consumers…
· Primary Consumers __________________ __________________________________
· Secondary Consumers ________________ __________________________________
· Tertiary Consumers __________________ __________________________________
· Scavengers _________________________ __________________________________
· Decomposers _______________________ ____________________________________________________________________
What Happens to all the Energy Consumed by Heterotrophs?
· They use most of it to ________________ ____________________________________________________________________
· Some of it is lost in the atmosphere as ____________
· Only ________ of the energy is available for the organisms that eat them!
Food Chains
· Food chains show ___________________ ____________________________________________________________________
· Arrows point _______________________ __________________________________
Draw a food chain in the space below. You may write the names of the organisms instead of drawing the pictures
Food Webs
· Very rarely in nature is the transfer of energy in an ecosystem _______________ __________________________________
· Food webs are interconnected food chains that show __________________________ ____________________________________________________________________
Use the Food Web above to answer the following questions:
Name the producer: ________________________
Name 2 herbivores: ________________________
Name 1 secondary consumer: ________________
Name 2 carnivores: ________________________
Why is this considered a food web and not a food chain? ___________________________________ ________________________________________________________________________________
Energy Pyramids
· An energy pyramid is yet another way of ____________________________________________________________________
· Each level is called a _________________
· They also show
o How amount of available energy ________________________________________________________
o How it takes a large number of ____________________________ to support a small number of ____________________________
How much energy from one trophic level of this (or any) food pyramid is available to be used by the trophic level above it? ___________________
How could the ecosystem pictured above support more owls? ________________________________________ ________________________________________________________________________________________________________________________