Ecosystem Relationships

Ecosystem Relationships

Howard 2022

Ecosystem Relationships

Objective

Students will be able to tell the difference between different interactions in ecosystems.

What is important about relationships in ecosystem?

​Some text here about the topic of discussion.

Why are relationships important?​

​No organism exists in isolation. Individual organisms live together in an ecosystem and depend on one another. 

Poll

All "relationships" between organisms are positive

• True

• False

Open Ended

What could be an example of a negative relationship between organisms?

Organisms competing for resources.

• Food / Water

• Shelter / Territory / Space

• Mates / Attractions

Competition

​Two organisms that live closely together

• Mutualism

• Commensulism

• Parasitism ​

Symbiosis

​One organisms is a resource for another organsim

• Helps control the size of populations​

Predator / Prey

​

​Types of Relationships

Poll

These types of relationships exist in human populations

• True

• False

Organisms competing for resources.

• Food / Water

• Shelter / Territory / Space

• Mates / Attractions

Competition

​Two organisms that live closely together

• Bacteria in/on our bodies

• Food production (bacteria and bees)​

• ​Tapeworm (parasite)

Symbiosis

​One organisms is a resource for another organsim

• Humans are removed from the food chain, but are predators to many organsims​

Predator / Prey

​

​Types of Relationships

Multiple Choice

Which type of relationship happens because of limited resources?

• Competition

• Symbiotic relationships

• Predator / Prey

When organisms compete over limited biotic and abiotic resources

• Food / Water / Nutrients

• Shelter / Space / Territory

• Mates ​

Competition

Competition between members of the same species

• Food / Water / Nutrients

• ​Shelter / Space / Territory

• ​Mates

Intraspecies

​

​Competition between members of different species

• Food / water / nutrients

• Shelter / Space / Territory ​

​​Interspecies

​

​Competition between Species

Multiple Choice

Why is competition important?

• Predator and prey relationships help stabilize the food web

• The best competitors are the ones who survive and get to pass on their genes.

• It keeps disease out of ecosystems

• Because energy flows up the food chain and without competition energy wouldn't flow upward

The best competitors are the ones who survive and get to pass on their genes.

Why is competition important?

Multiple Choice

Which type of relationship happens because of organisms living closely together?

• Competition

• Symbiotic relationships

• Predator / Prey

Two different species that live closely together

• Mutualism

• Commensulism

• Parasitism ​

​

​Some text here about the topic of discussion.

Symbiotic Relationships

​Both Organisms benefit!

WIN WIN!!! ​

Mutualism

One organism benefits. The other one isn't negatively impacted.

WIN / indifferent ​

Commensalism

​

One organism benefits. One organism is harmed.

WIN / Lose​

Parasitism

Types of Symbiotic Relationships

​You have bacteria in your intestines that breakdown the food you eat.

They get energy from this process and so do you!

Bacteria make Vitamin K for you!​

Mutualism

You have bacteria on your skin.

These bacteria normally do not hurt you, but benefit from you giving them nutrients and resources. ​

Commensualism

​

Some bacteria can enter our bodies and make us sick. They benefit from us be we are harmed by them

Parasitism ​

​

​Humans and Bacteria

Multiple Choice

What type of symbiotic relationship is a win / indifferent relationship?

• Mutualism

• Commensualism

• Parasitism

Multiple Choice

Which type of relationship happens to limit populations size?

• Competition

• Symbiotic relationships

• Predator / Prey

Predator / prey relationships exist to control the population size of other organisms

• Without this relationship populations would grow ​

​

​Some text here about the topic of discussion.

Predator Prey Relationship

​

Anything that eats another organisms for food. ​

Anything that hunts for it's food. ​

​

​​Predator

​Anything that is eaten by another organism.

Anything that is hunted to be food.

​​Prey

​Predator / Prey

Populations increase as food becomes available

Populations decrease as food becomes less available.

​

Population size change from year to year but stay stady over long periods of time. ​

​

Predator Prey Cycle

Multiple Choice

Predator / Prey relationships only keep the prey population in check

• True

• False

Multiple Choice

How is the predator population controlled through a predator prey relationship?

• Predators lose energy as they hunt their prey

• Prey get smarter than the predators so they don't get eaten

• As prey become harder to find, the predator population declines

• Predators find other food sources so they can continue to grow their population