Community Interactions

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Presentation transcript:

Community Interactions when organisms live together in an ecological community they interact constantly. Three types of interactions Competition Predation Symbiosis

Competition- competing for resources occurs due to a limited number of resources Resource- any necessity of life. water, nutrients, mates, space, shelter & food. Competitive exclusion principle- no two species can occupy the same niche in the same habitat at the same time

Predation Predation- when an organism captures and feeds on another organism. Predator- hunter Prey- hunted

Symbiosis Symbiosis- any relationship where two species live closely together. (3 types) Mutualism Commensalism Parasitism

Symbiosis Mutualism- both species benefit from a relationship. (+, +) Examples: Lichens (fungus and Algae) Clownfish and Sea Anemone

Symbiosis Commensalism – One member of a symbiotic relationship benefits and the other is neither helped or harmed (+,0) Ex. Shark and Remora fish

Symbiosis Parasitism- One creature benefits and one creature is harmed (+,-) - Parasite harms the host Ex. tapeworm-Feeds in a humans intestines absorbing his/her nutrients. Flea and dog

Ticket out the door 1. List in order the levels of organization starting with cells and ending with biosphere. 2. Compare the 3 types of symbiotic relationships and provide an example for each: Mutualism Commensalism Parasitism