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Symbiotic Relationships in Coral Reefs. Symbiosis. “Living Together”. Types of Symbiosis. Mutualism Both the symbiont and host benefit. Commensalism The symbiont benefits with little effect on the host. Parasitism The symbiont benefits to the detriment of the host. Aegism
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Symbiosis “Living Together”
Types of Symbiosis • Mutualism • Both the symbiont and host benefit. • Commensalism • The symbiont benefits with little effect on the host. • Parasitism • The symbiont benefits to the detriment of the host.
Aegism • An association for protection • Inquilism • One organism shelters within another organisms • Endoecism • One org shelters in the burrow or defensive shelter of another • Phoresis • One org uses another for transportation • Epizoism • - A sessile org lives on top of another
Obligate Relationship: Relationship is necessary for organism to survive Ex. coral and zooxanthellae Facultative Relationship: Can survive without symbiont, but not as well Ex. anemone fish and anemone
Zooxanthellae give corals: • Increase coral growth by enhancing calcification process • Provide energy • Give oxygen • Coral give zooxanthellae: • Nitrogen waste • A place to live • Carbon dioxide waste • Protection through their hard skeletons and stinging cells • Harmful UV light is filtered by coral pigments
Trapezia crab coming out of its host coral (Pocillopora damicornis) to attack the arm of an invading Crown of Thorns Starfish
Camouflage Decorator Crab Sponge crab
Inquiry • Define mutualism, commensalism, and parasitism. • Provide examples of each. • What are the benefits the zooxanthellae and coral receive?