Interactions between species are what define ecological communities, and community ecology studies these interactions anywhere they take place. Although interspecies interactions are mostly competitive, competition is pretty dangerous, so a lot of interactions are actually about side-stepping direct competition and instead finding ways to divvy up resources to let species get along. Feel the love?

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Table of Contents
1) Competitive Exclusion Principle 2:02
2) Fundamental vs. Realized Niche 3:48
3) Eco-lography / Resource Partitioning 5:25
4) Character Displacement 7:29
5) Mutualism 9:15
6) Commensalism 9:55

References for this episode can be found in the Google document here: http://dft.ba/-2YuA

crashcourse, ecology, biology, competition, evolution, survival, habitat, species, interaction, communities, community ecology, resource, animal, limiting factors, competitive exclusion principle, success, paramecium, competitive advantage, extinction, food, prey, diversity, life, adaptation, niche, security, stability, fundamental niche, realized niche, conflict, nature, natural order, robert macarthur, warbler, ecologist, yale, resource partitioning, observation, zone, hunting, foraging, coexist, organism, selection, character displacement, peter grant, rosemary grant, galapagos finches, trait, mutualism, commensalism, mycorrhizae, termite, obligate mutualism, barnacle Support CrashCourse on Subbable: http://subbable.com/crashcourse