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Bellwork

Create a food chain that ends with you.

Identify the energy role of each organism in this food web at right (producer, consumer, decomposer) for the consumers specify whether they are first, second, or third level.

Which level of the food web contains the greatest amount of energy?

Interactions in communities

Bellwork

1. Name a producer 2. Name a 2 nd level consumer 3. Name a 3 rd level consumer 4. What do the arrows represent 5. Name an omnivore 6. Name an herbavore 7. Name a carnivore

Interactions in Communities

EQ: How do organisms interact in an ecosystem?

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Obj: describe the types of interactions and their effect on communities SC.7.L.17.2

What are some ways that organisms interact?

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Predation

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Symbiosis

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Competition

What is Predation?

• Predation –interaction where one organism kills and eats another • • Predator – the organism that does the killing Prey – The organism that is killed

Predators and Prey have adaptations

to help them survive:

Prey adaptations

Predator/Prey Adaptations

Predator adaptations

Claws and Teeth Stinging tentacles Strong senses speed

Prey adaptations:

Camouflage Protective coverings Mimicry False coloring

How are predator and prey populations connected?

• If one population grows or shrinks, the other is affected Ex: More rabbits  more foxes  foxes need more food  eat more rabbits  rabbit population declines  food shortage for foxes  fox population shrinks  more rabbits

Complete the Venn Diagram to compare and contrast Predators and Prey Prey Predator

What is symbiosis?

• Symbiosis – A close long-term relationship between different species in a community • Organisms can benefit, be harmed or be unaffected.

• http://www.youtube.com/watch?v=zSmL2F1t81 Q

Mutalism

• Both organisms benefit • A bee drinks nectar and pollinates the flower

Commensalism

• One organism Benefits, the other is unaffected • EX: Orchids on trees – better sunlight for orchid, no effect on tree

Parasitism

• • One organism benefits One is harmed • • Parasite – the organism that benefits Host – harmed • Ex: tapeworm gets food, dog gets weaker

What is competition?

• Competition occurs when organisms fight for the same limited resources such as food, water, space, light, oxygen, and minerals.

• • In same species: – Groups of lions compete with each other for living space Between different species – Lions compete with leopard and cheetahs for food (zebras), water

Exit: Interaction in Community

• • • • List the 3 main kinds of species interaction What affect might an increase in the lion population have on competition in a community?

Compare the 3 types of symbiosis You have bacteria living in your intestines that help you digest food. Classify this relationship

Cause

Cause and effect – examples of competition in a community

Effect

A population of lions grows too large to share their current territory Several male hyenas compete to mate with the females in their area

Bellwork –Thurs.

1. A fox eats a rabbit that ate a carrot. The fox dies and decays. Create a food chain that shows the transfer of energy. Identify the energy roles of each organism 2. List the 3 types of symbiosis. Describe how the 2 organisms in each are affected: (benefited, harmed, neither) 3. A population of lions grows too large to share their current territory, what might happen? (

your answer ) use competition, habitat, limiting factor, resources, prey in

EQ: How do organisms interact in an ecosystem?

• Obj: I can describe the types of symbiosis because I can identify examples

• Types of symbiosis As you watch the short video, look for examples of: Parasitism, Mutualism, Commensalism

Symbiosis Stations:

Each group will receive a task card with an example of one of an example of an interaction between organisms in an ecosystem For each card, person number….

1. Read the example to the group 2. Name the organism(s) that benefits 3. Name any organism that is helped/harmed/neither 4. identify the type of symbiosis 5. describe the relationship (if no 5 all do this together)

Rotate jobs with each new task card .

exit: identify the type of symbiosis

1. Tiny mites live in human eyelashes and feed on dead skin 2. Bacteria live in human intestines where they get food and help humans break down their food 3. Ants live on a tree which gives them food and shelter. They deter grazing animals from eating the tree by biting them.

4. A tick attaches itself to a white tailed deer 5. Barnacles grow on the shell of a scallop. They get a place to live, the scallop is unharmed.

• Bellwork:

A tiger shark lurks beneath the surface of the clear blue water looking for shadows of young albatross floating above it. The shark sees an albatross chick and silently swims closer. The shark bursts through the water and seizes the albatross with one snap of its powerful jaw Describe this interaction: use the words predator, prey, population, increase, decrease, competition

Bellwork – Fri

Predator Prey lab:

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Grudge Match

Object: remove points from other teams. The team with the most points at the end of the game wins Remove 2 X’s from other team(s) for each correct answer Shoot from the 2 or 3 point line to remove 2 or 3 extra points If you go out, you may get your team back in by answering a question correctly and shooting to get more points.

Bellwork

• • • • • Name the producers in this food web Name the 1 st level consumers Name the 2 nd level consumers What other 2 categories are missing from this food web If you are counting all of the gray wolves in an area what level of ecological organization are you studying?