Unit 3: Ecosystems Chapter 6 – Part 1 Pg. 92-95. 3.1.1 Define Ecosystem Ecosystem = the network of...
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Transcript of Unit 3: Ecosystems Chapter 6 – Part 1 Pg. 92-95. 3.1.1 Define Ecosystem Ecosystem = the network of...
Unit 3: EcosystemsUnit 3: EcosystemsChapter 6 – Part 1Chapter 6 – Part 1
Pg. 92-95Pg. 92-95
3.1.1 Define Ecosystem
Ecosystem = the network of relationships (interactions) among plants, animals (living) and the non-living parts in an environment.
3.2.1 Producers
Producer = a plant which can synthesize carbohydrates using carbon dioxide and the sun’s energy.
“Produce” their own food AND food for the rest of the ecosystem
Other examples:GrassesTrees shrubsWater liliesFlowersVegetablesFruits
Consumers = All those organisms that have to eat (consume) plants or animals to obtain their food.
3.2.1 Consumers
Types of consumers
Primary Consumers: Animals that eat producers. Also called 1st. order consumers or herbivores. (Ex. Rabbit, squirrels, grouse, insects)
Secondary Consumers: Animals that eat primary consumers. Also called 2nd. order consumers or carnivores. (fox, owl, mink )
Tertiary Consumers: Animals that eat secondary consumers. Also called 3rd. order consumers or carnivores. (Wolf, coyote, hawk)
Omnivores: Animals that eat both producers (plants) and consumers (animals).
• Decomposers = Simple organisms that obtain their food from dead/decaying organisms and wastes.
3.2.1 Decomposers
Examples:WormsBacteriaFungiProtozoa
Identify;Identify;ProducersProducers
HerbivoresHerbivores
CarnivoresCarnivores
OmnivoresOmnivores
What’s missing?What’s missing?
Decomposers!Decomposers!
3.2.3 Food chain
Food chain = linear sequence representing the flow of nutrition from the simplest plant to the top carnivore.
Ie. What eats what??
3.2.4 Food web
Food web = a series of interconnecting food chains in an ecosystem.
Shows all possible flows of nutrition.
Much more complicated!!
Food Chain vsvs Food Web
Identify examples of producers & consumersSee “Handout”
Producers
Primary Consumers / herbivores
Secondary Consumers / Carnivores
Tertiary Consumers / Carnivores
Decomposers
Shrubs, grass, trees
Grasshopper, rabbit, deer
Mountain lion, snake, shrew, insect-eating bird, hawk
Hawk, snake, mountain lion
Bacteria, fungi
Give an example of a food chain from figure to the right.
Note: The arrows indicate the flow of energy & nutrients from one level to the next
Tree
→
insect
→
insect eating bird →
hawk
Producer Primary consumer
2nd order consumer
3rd order consumer
Sample Food Chain
Draw an example of a food web containing humans.
MosquitoHawkCow
GrassMan
WormsPhytoplankton
Fish
Draw an example of a food web containing humans.
ManCow
Mosquito
Hawk
Phytoplankton
fish
Grass Worms
Using a diagram, describe the relationship Using a diagram, describe the relationship between latitude and the sequence of between latitude and the sequence of ecosystems.ecosystems.
Using a diagram, describe the relationship Using a diagram, describe the relationship between elevation and the sequence of between elevation and the sequence of ecosystems. (a) ecosystems. (a)