Types of Community Interactions

CompetitionPredationSymbiosis

CompetitionCompetition—interaction in which organisms of the same or different species attempt to use the same ecological resource in the same place at the same time.

PredationPredation—interaction in which one organism captures and feeds on another organism.

Symbiotic RelationshipsSymbiosis- two species living

togetherhttp://www.youtube.com/watch?v=zSmL2F1t81Q

3 Types of symbiosis:1. Commensalism2. Parasitism3. Mutualism

Type of relationship

Species harmed

Species benefits

Species neutral

CommensalismParasitism

Mutualism

= 1 species

Symbiotic RelationshipsCommensalism-

one species benefits and the other is neither harmed nor helped

Ex. orchids on a treeEpiphytes: A plant, such as a tropical orchid or a bromeliad, that grows on another plant upon which it depends for mechanical support but not for nutrients. Also called xerophyte, air plant.

Symbiotic RelationshipsCommensalism-

one species benefits and the other is neither harmed nor helped

Ex. polar bears and cyanobacteria

Commensalism

Whale & Barnacles

Shark & Remora

Symbiotic RelationshipsParasitism- one species benefits (parasite)

and the other is harmed (host)

• Parasite-Host relationship

Symbiotic RelationshipsParasitism- parasite-hostEx. lampreys, leeches, fleas,ticks, tapeworm,

Not considered predator-prey because goal is not to KILL host

Symbiotic RelationshipsMutualism- beneficial to both

species Cleaner Shrimp &

Fish

Bee & Flower

Mutualism

Egyptian Plover

& Crocodile

Symbiotic RelationshipsMutualism-

beneficial to both species

LichenFungus

+BluegreenAlgae