community interactions. what’s a community? all the living things in an area habitat: the place...

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Page 1: Community interactions. What’s a community? All the living things in an area Habitat: the place an animal lives Niche: an animal’s job, or function

Community interactions Community interactions

Page 2: Community interactions. What’s a community? All the living things in an area Habitat: the place an animal lives Niche: an animal’s job, or function

What’s a community?What’s a community?

All the living things All the living things in an areain an area

HabitatHabitat: the place : the place an animal livesan animal lives

NicheNiche: an animal’s : an animal’s job, or function in job, or function in the communitythe community

What plants and animals live in an oak woodland community?

Page 3: Community interactions. What’s a community? All the living things in an area Habitat: the place an animal lives Niche: an animal’s job, or function

Rolls in a community Rolls in a community Producers:Producers: The organisms that The organisms that

can make food can make food – blue-green bacteria, plantsblue-green bacteria, plants

Consumers:Consumers: organisms that organisms that must eat other organismsmust eat other organisms– AnimalsAnimals

DecomposersDecomposers: Get their : Get their energy by breaking down energy by breaking down dead matterdead matter– bacteria, fungi, wormsbacteria, fungi, worms

Page 4: Community interactions. What’s a community? All the living things in an area Habitat: the place an animal lives Niche: an animal’s job, or function

Relationships in a communityRelationships in a community

Many different relationships are found between organisms in every community– predator/ prey– Symbiosis– Mutualism – Commensalisms– Parasitism

Page 5: Community interactions. What’s a community? All the living things in an area Habitat: the place an animal lives Niche: an animal’s job, or function

PredationPredation

One organism One organism eats anothereats another

The one being The one being eaten always eaten always diesdies

The predator The predator benefits the benefits the prey does notprey does not

+/- +/- Ladybug beetle preying on an aphid. (Source: Photo by Graham Shepard, Rothamsted Research)

Page 6: Community interactions. What’s a community? All the living things in an area Habitat: the place an animal lives Niche: an animal’s job, or function

SymbiosisSymbiosis

Any relationship in which Any relationship in which two species live closely two species live closely togethertogether

One example is lichen: One example is lichen: algae & fungus live as algae & fungus live as oneone

Page 7: Community interactions. What’s a community? All the living things in an area Habitat: the place an animal lives Niche: an animal’s job, or function

Mutualism Mutualism

a symbiotic a symbiotic relationship in which relationship in which both species benefitboth species benefit

cleaner fish & moray cleaner fish & moray eeleel

+/++/+

Page 8: Community interactions. What’s a community? All the living things in an area Habitat: the place an animal lives Niche: an animal’s job, or function

CommensalismsCommensalisms

Relationship where one organism Relationship where one organism benefits & the other is benefits & the other is neither neither harmed nor helped.harmed nor helped.

epiphytes and their host trees,epiphytes and their host trees, +/ 0 +/ 0

Page 9: Community interactions. What’s a community? All the living things in an area Habitat: the place an animal lives Niche: an animal’s job, or function

ParasitismParasitism One organism lives One organism lives at the expense ofat the expense of

anotheranother The parasite is helped, the host is The parasite is helped, the host is

harmedharmed +/- Tapeworm

life cycle

Page 10: Community interactions. What’s a community? All the living things in an area Habitat: the place an animal lives Niche: an animal’s job, or function

ReviewReview

1. What kind of relationship is it when both organisms benefit?

2. What is it called when one organism benefits and the other is not effected?

3. What is this picture an example of?

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