UNI101Y1 : Ch17 Evolution of Species Interactions4.pdf
16 Feb 2013
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Competitors influence the exact ways in which efficiency can be increased b/c of their effects on resource availability. Pop. quickly achieved a pattern of stable coexistence. Bio120h lisa zhao 2011 | page 4. Ffrraanncciissccoo aayyaallaa y d (competition) u t s h c r a e s e r. 70-80% d. nebulosa in one cage, serrata began increasing and attainded 80% by. Experiment 2: removed indiv. after the 30th week and tested them against stocks that were maintained in single-species cultures. Competitive ability of each species was found to have increased after exposure to the other. When serrata from cage that displayed dominance was tested. Against unselected stocks of nebulosa, they again dominated. Adaptation not determined: could have been increase in efficiency use of food, # of offspring produced, or survival at any stage of life cycle. Sparse pop. can evolve the ability to compete against other species more rapidly than dens pop.
