THE EVOLUTIONARY TRIAD OF MICROBES, FRUITS, AND SEED DISPERSERS - AN EXPERIMENT IN FRUIT CHOICE BY CEDAR WAXWINGS, BOMBYCILLA-CEDRORUM

被引:49
作者
BUCHHOLZ, R
LEVEY, DJ
机构
关键词
D O I
10.2307/3545535
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
Tested the hypothesis that microbes that infect fruit make fruits unattractive to vertebrate seed dispersers as a mechanism to avoid their own consumption by presenting cedar waxwings with pair-wise choices between infected and uninfected fruits of 5 species. Birds displayed a strong preference for the uninfected fruits. Not only did they initially pick up uninfected before infected fruits, but they dropped significantly more infected fruits. Cedar waxwings thus apparently use both visual and gustatory cues to detect decayed fruit. Fruit defenses against infection are thought to have a similar effect. Thus, the interactions between dispersers, fruiting plants and microbes are not independent: selective forces on seed dispersal traits that are generated by one type of frugivore (microbes or seed dispersers) may dampen the evolutionary effects of the other type of frugivore. -from Authors
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页码:200 / 204
页数:5
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