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Bell Ringer • Draw a food chain with at least 5 organisms – 1 producer – 4 consumers (1 should be a decomposer) • Label the trophic levels. Types of Community Interactions Competition Predation Symbiosis Competition—interaction in which organisms of the same or different Competition species attempt to use the same ecological resource in the same place at the same time. Predation—interaction in which one organism captures, KILLS, Predation and feeds on another organism. Symbiotic Relationships Symbiosis- two species living together http://www.youtube.com/watch?v=zSmL2F1t81Q 3 Types of symbiosis: 1. Commensalism 2. Parasitism 3. Mutualism Symbiotic Relationships Commensalismone species benefits and the other is neither harmed nor helped Ex. orchids on a tree Epiphytes: 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 Relationships Commensalismone species benefits and the other is neither harmed nor helped Ex. polar bears and cyanobacteria Commensalism Whale & Barnacles Shark & Remora Symbiotic Relationships Parasitismone species benefits (parasite) and the other is harmed (host) • Parasite-Host relationship Symbiotic Relationships Parasitism- parasite-host Ex. lampreys, leeches, fleas, ticks, tapeworm, Not considered predator-prey because goal is not to KILL host Symbiotic Relationships Mutualism- beneficial to both species Cleaner Shrimp & Fish Bee & Flower Mutualism Egyptian Plover & Crocodile Symbiotic Relationships Mutualismbeneficial to both species Fungus + Bluegreen Algae Lichen Type of Species relationship harmed Commensalism Parasitism Mutualism = 1 species Species benefits Species neutral