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Symbiosis, Niches and Competition Interaction between members of two different species that live together in close association 3 Types of Symbiosis Mutualism both organisms benefit Commensalism one species benefits and the other is neither harmed nor helped Parasitism one species benefits and the other is harmed Which type of Symbiosis? Which type of Symbiosis? Brood Parasitism Symbiosis Review Niche The special roles that organisms have in an ecosystem. Physical, chemical and biological interactions for a species to grow, survive and reproduce Specific to one species Niche Examples Niche of the Blue Heron lives near water to fish can nest close to water for easy access to food and escape from predators Camouflaged nest in long grass long legs for deeper fishing than other birds Competition Harmful interaction between two or more organisms that can occur when organisms are competing for the same resource If a new species is introduced it can compete for the same niche space that is already occupied Why might this be a bad thing? Competition