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首页> 外文期刊>Journal of Insect Conservation >Unfortunate encounters? Novel interactions of native Mecyclothorax, alien Trechus obtusus (Coleoptera: Carabidae), and Argentine ant (Linepithema humile, Hymenoptera: Formicidae) across a Hawaiian landscape.
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Unfortunate encounters? Novel interactions of native Mecyclothorax, alien Trechus obtusus (Coleoptera: Carabidae), and Argentine ant (Linepithema humile, Hymenoptera: Formicidae) across a Hawaiian landscape.

机译：不幸的遭遇？遍及夏威夷景观的原生Mecyclothorax，外星人Trechus obtusus（鞘翅目：Carabidae）和阿根廷蚂蚁（Linepithema humile，膜翅目：Formicidae）之间的新颖相互作用。

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摘要

The Hawaiian Islands support a speciose radiation of native Mecyclothorax beetles (Coleoptera: Carabidae). This lineage has undergone a classical island radiation resulting in extensive ecological specialization, flight-wing loss, and 100% single-island endemism. We report on the sympatric occurrence of several Mecyclothorax species endemic to Haleakala volcano, East Maui with the newly arrived, adventive Trechus obtusus (Coleoptera: Carabidae), a tramp species originally from Europe. Arrival of T. obtusus in afforested, non-native gymnosperm plantation forest near Polipoli, Maui was associated with subsequent decreased abundance of native Mecyclothorax beetles. Since discovery of T obtusus on Haleakala, their populations have been transformed through subsequent increase in frequency of brachypterous individuals. Consequences of this transformation to flight-wing dimorphic populations may simultaneously include enhanced reproductive capacity of brachypterous individuals, increased local adaptation of populations, and enhanced metapopulational dynamics ultimately permitting range expansion and occupation far beyond anything observed for the monomorphically brachypterous native Mecyclothorax. Trechus obtusus and several Mecyclothorax species occur sympatrically with Argentine ant, Linepithema humile (Hymenoptera: Formicidae) in subalpine shrublands on Haleakala. Recent sampling corroborates earlier findings that localized presence of Argentine ant is associated with significantly decreased abundance of native Mecyclothorax. Conversely, abundance of the continental T obtusus is not significantly affected by ant presence.
机译：夏威夷群岛支持原生的Mecyclothorax甲虫（鞘翅目：Carabidae）的特定辐射。该血统经历了经典的岛屿辐射，导致广泛的生态专业化，飞行机翼损失和100％单岛特有性。我们报告了东部毛伊岛哈雷阿卡拉火山特有的几种Methorathox物种与新来的外来物种Trechus obtusus（鞘翅目：Carabidae）同生的情况，该物种最初来自欧洲。毛伊岛T. obtusus到达毛伊岛波利波利附近造林的非本地裸子植物人工林，其结果与当地甲环甲虫的丰度下降有关。自从在哈雷阿卡拉上发现了T.tustusus以来，他们的种群已通过随后矮腕动物个体频率的增加而发生了转变。这种向飞行双态种群的转化的后果可能同时包括腕足类个体的生殖能力增强，种群的局部适应性增强以及增强的种群动态，最终使范围扩展和占领范围大大超出了单态的腕足类原生动物Mecyclothorax。在哈雷阿卡拉的亚高山灌丛中，Trechus obtusus和一些Mecyclothorax物种与阿根廷蚂蚁Linepithema humile（Hymenoptera：Formicidae）同生。最近的抽样证实了较早的发现，即阿根廷蚂蚁的局部存在与天然甲环胸苷的丰度明显降低有关。相反，蚂蚁的存在并没有显着影响欧亚对虾的丰度。

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