UNI101Y1 Study Guide - Microorganism

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Bio120h lisa zhao 2011 | page 6. Aappppaarreenntt ccoommppeettiittiioonn: competition b/w 2 or more species that is mediated by their consumers. The depressing effect of one competitor species on the other resembles exploitative/interference competition, but represents the action of a diff. mechanism. Outcome of competition depend largely on species ability to avoid or tolerate consumers. When algae are established near corals, corals die. Past research showed that corals more likely to die in presence of dissolved c. Deaths correlated w/ an increase in growth of microbes that normally live on coral surface. Algae secreting dissolved c which supported microbe growth. Microbe block diffusion of oxygen to coral tissues and suffocate (apparent them competition b/w corals and algae. Found that corals survived when algae were absent and suffered high mortality when they were present mediated by. When added antibiotic to water, corals survived in both cases microbes) Confirms coral mortality was due to microbes.

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