种间竞争在实蝇入侵中的作用

The potential role of interspecific competition in fruit fly invasions

实蝇是一类危害热带、亚热带水果蔬菜的重要害虫。调查表明,实蝇由入侵引起的种间竞争,一个突出现象就是实蝇种间的入侵具有显著的等级特征,种间竞争性替代具有强烈的方向性,其竞争作用可导致入侵实蝇种群的灭绝或者数量的巨大改变。目前有关实蝇种间竞争的等级性模式既未得到进一步研究验证,也未明确其中隐含的作用机制。深入研究实蝇种间竞争的作用机制为检疫性实蝇的风险评估和管理提供参考,同时也为认识农林害虫群落的演替规律提供理论依据。

Many species in the family of Tephritidae （ fruit flies） are very important eeonomie inseet pests on fruit crops in tropical and subtropical regions. The interspeeific competition among tephritid in the event of invasion has an obvious phenomenon of hierarchy. The invasion oeeurred in tephritid usually resulted in a decrease both in population and niehe width of pre - established species, whieh replaeed by the invasive species. However, the reciprocal invasion phenomenon has not been observed. This interspeeific competition mode oeeurred in tephritid has not been verified direetly yet by researches to demonstrate the behavior of competition during the invasion, also the mechanism it implied. The researches on competition mechanisms in tephritid could provide essential information in risk analysis and management of the invasive tephritid species.