PDF(Pubmed)
Abstract：
Forcipomyia (Lasiohelea) taiwana, a small bloodsucking midge, thrives in moderately moist habitats and is commonly found in grassy and bushy areas at an elevation below 250 m. This species exhibits a diurnal biting pattern and shows a marked preference for human blood. Although not known to transmit arthropod-borne diseases, the bites of F. taiwana can induce severe allergic reactions in some individuals. As a significant nuisance in Taiwan, affecting both daily life and the tourism industry, comprehensive studies on its population genetics across different geographical regions remain scarce. The central mountain ranges in Taiwan, comprising more than two hundred peaks above 3000 m in elevation, extend from the north to the south of the island, creating distinct eastern and western geographical divisions. This study utilizes microsatellite markers to explore the genetic differentiation of F. taiwana populations located in the eastern and western regions of the mountain ranges. Our findings reveal substantial genetic differentiation among populations inhabiting Taiwan\'s western region compared to those in the eastern region. This indicates that the topographical barriers presented by the mountain ranges significantly restrict gene flow, particularly given the species\' limited active flight ability and habitat preferences. Although passive dispersal mechanisms, like wind or human activity, could contribute, this study concludes that the gene flow of F. taiwana between the western and eastern regions is primarily influenced by topographical constraints.
摘要：
鱼肉(Lasiohelea)taiwana，一只吸血的小蚊子,在中度潮湿的栖息地中繁茂，通常在海拔250m以下的草丛和茂密地区发现。该物种表现出昼夜的叮咬模式，并表现出对人类血液的明显偏爱。虽然不知道会传播节肢动物传播的疾病，在某些个体中，F.taiwana的叮咬会引起严重的过敏反应。作为台湾的一个重大麻烦，影响日常生活和旅游业，对不同地理区域的种群遗传学进行全面研究仍然很少。台湾的中央山脉，包括两百多个海拔3000米以上的山峰，从岛上的北部延伸到南部，创建不同的东部和西部地理划分。这项研究利用微卫星标记来探索位于山脉东部和西部地区的F.taiwana种群的遗传分化。我们的发现揭示了与东部地区相比，居住在台湾西部地区的人群之间的遗传差异很大。这表明山脉呈现的地形障碍显著限制了基因流动，特别是考虑到物种有限的主动飞行能力和栖息地偏好。虽然被动分散机制，比如风或人类活动，可以做出贡献，这项研究得出的结论是，西部和东部地区之间的F.taiwana基因流动主要受地形限制的影响。
