No evolution of reduced resistance and compensation for psyllid herbivory by the invasive Genista monspessulana

摘要: The evolution of redirecting resources from plant defense to growth or reproduction may explain why some exotic species are successful invaders in new environments. For example, the increased competitive ability hypothesis posits that escape herbivores by invasive plants results selection more vigorous genotypes reduce their allocation defense. In addition, understanding strategy an help forecast likely impact herbivory. We tested prediction reduced (i.e., resistance) Genista monspessulana, measured indirectly as performance a specialist psyllid herbivore, comparing five native and introduced populations. also examined G. monspessulana compensate for herbivory presence absence psyllids single population regions. Plant origin (native introduced) did not influence psyllid’s abundance rate, suggesting no change resistance plants. Similarly, we found overall difference between individuals herbivory, was able fully Damaged compensated changing pattern branching, which resulted greater dry leaf biomass. conclude defenses does success invader compensation limit efficacy biological control agent.