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首页> 美国卫生研究院文献>Journal of Insect Science >City-Dwellers and Country Folks: Lack of Population Differentiation Along an Urban–Rural Gradient in the Mosquito Culex pipiens (Diptera: Culicidae)
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City-Dwellers and Country Folks: Lack of Population Differentiation Along an Urban–Rural Gradient in the Mosquito Culex pipiens (Diptera: Culicidae)

机译：城乡居民和乡村居民：蚊子库蚊（Pilexens）（Diptera：Culicidae）沿城乡梯度缺乏人口分化

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Mosquitoes (Diptera, Culicidae) occur in natural, urban, and peri-urban areas throughout the globe. Although the characteristics of urban and peri-urban habitats differ from those of natural habitats in many ways (e.g., fragmentation, pollution, noise, and light), few studies have examined the population connectivity of mosquitoes in urban areas. To obtain an overview of the species composition, we sampled mosquitoes from 23 sites in and around the city of Berlin, Germany. Of 23 species, five occurred in urban, 10 in peri-urban, and 20 in rural areas. Culex pipiens Linnaeus (Diptera: Culicidae) was the most common species collected (75% of all individuals) and occurred in all habitats. Hence this species was selected to be analysed at 10 microsatellite markers. There was no significant differentiation (FST = 0.016, P = 0.9) or isolation by distance (P = 0.06) among Cx. pipiens populations along an urban–rural gradient. The only significant differences detected were between Cx. pipiens and a laboratory population of Cx. pipiens f. molestus (pairwise FST = 0.114–0.148, P ≤ 0.001 in all comparisons), suggesting that the markers chosen were suitable for the identification of population differentiation. Our results indicate that Cx. pipiens gene flow is widespread within and among urban, peri-urban, and rural areas and that urban habitat does not necessarily impede or enhance gene flow among these populations.
机译：蚊子（双翅目，蚊科）分布在全球的自然，城市和郊区地区。尽管城市和城市郊区生境的特征在许多方面都与自然生境不同（例如，破碎，污染，噪音和光线），但是很少有研究检查了城市蚊子的种群连通性。为了获得物种组成的概述，我们从德国柏林市内及其周围的23个地点取样了蚊子。在23种物种中，有5种发生在城市，在城市周边有10种，在农村地区有20种。淡色库蚊（Dilexera：Culicidae）是最常见的物种（占所有个体的75％），并且发生在所有栖息地。因此，选择该物种以10个微卫星标记进行分析。 Cx之间无显着差异（FST = 0.016，P = 0.9）或按距离隔离（P = 0.06）。沿城市-农村梯度的pipiens种群。检测到的唯一显着差异是Cx之间。 pipiens和Cx的实验室种群。 pipiens f。鼠疫（成对FST = 0.114–0.148，在所有比较中P≤0.001），表明选择的标记物适合鉴定种群分化。我们的结果表明Cx。 pipiens基因流在城市，城郊和农村地区之内和之中广泛分布，并且城市栖息地不一定会阻碍或增强这些人群之间的基因流。

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