Interactions between Organisms

Quick review

List all of the biotic & abiotic factors

 What is the portion of the earth that supports life called? Give 2 examples of abiotic factors. What do you call the role a species plays in its environment? Biosphere  Niche

What is formed by several populations that interact with each other? What do you call a community and its abiotic factors? List the levels of biological organization from smallest to largest. Community Ecosystem OPCEB

Community Interactions Organisms interact in order to obtain energy and resources necessary to stay alive

Competition Organisms of the same or different species attempt to use a limited resource in the ecosystem

Predation An interaction in which one organism captures and feeds on another organism.

Symbiosis A relationship where two species live closely together 3 types

1) Mutualism Both species benefit +/+

Golden damselfish being cleaned by 2 different cleaner fish- both parties benefit.

2) Commensalism One species benefits and the other is not harmed or benefited. +/0

Crab sheltering in carpet of a sea anemone

3) Parasitism One species benefits and the other is harmed. +/-

Mosquitoes are a parasite Mosquitoes are a parasite. They benefit from our blood and we are harmed by the bite and/or transmitted disease.

These are common parasites. Lice, Hookworms, Fleas, Ticks, Leeches

Quick Review

Describe commensalism. Describe mutualism. Describe parasitism. One organism benefits, the other is neither harmed or benefited. Both organisms benefit. One organism benefits, the other is harmed.