Understanding the medical and economic impacts of mosquitoes (Diptera: Culicidae) begins with knowing their natural history and distribution, including their association with habitat types, particularly those in which human activity is high. The effects of habitat on shaping the community structure of mosquitoes were studied across periurban habitats on the island of Montréal, Québec, Canada in 2014 and 2015. Mosquitoes were collected from 20 fixed sampling locations in suburban backyards, fields, and forests, using CO2-baited light-emitting diode encephalitis vector survey traps. A total of 184 607 mosquitoes were collected, representing eight genera and 35 species. Suburban, field, and forest sites had different communities of mosquitoes, but differences were not apparent among sites within similar habitat types in nonmetric multidimensional scaling ordinations and permutational multivariate analysis of variance. In both years, the greatest abundance of mosquitoes was collected from field habitat, and the highest species richness, from forests. Suburban sites consistently generated the lowest abundance and diversity. Nearly 75% of the total individuals collected were from three species: Aedes vexans (Meigen), 39%; Coquillettidia perturbans (Walker), 18%; and Aedes canadensis (Theobald), 16%. This research shows that diverse communities of mosquitoes can be found in forests, fields, and backyards, yet the communities between forests differ from more open habitats. Our community analysis reveals that medically important species (e.g., Culex sp.) are more commonly encountered in suburban backyards, yet overall mosquito nuisance potential is greater in forest and field habitats. This information highlights important patterns of mosquito abundance and species occurrence, vital for the development of management programmes.

要了解蚊子（双翅目：蚊科）的医学和经济影响，首先要了解它们的自然历史和分布，包括它们与栖息地类型的关联，尤其是那些人类活动频繁的栖息地类型。2014 年和 2015 年，在加拿大魁北克省蒙特利尔岛的城郊栖息地中研究了栖息地对塑造蚊子群落结构的影响。 使用 CO 2从郊区后院、田野和森林的 20 个固定采样点收集蚊子- 诱饵发光二极管脑炎病媒调查陷阱。共收集蚊子184 607只，代表8属35种。郊区、田野和森林地点有不同的蚊子群落，但在非度量多维尺度排序和排列多变量方差分析中，相似栖息地类型的地点之间的差异并不明显。在这两年中，从野外栖息地收集到的蚊子数量最多，从森林中收集到的物种丰富度最高。郊区站点始终产生最低的丰度和多样性。收集的总个体中近 75% 来自三个物种：伊蚊(Meigen)，39%；Coquillettidia perturbans（沃克），18%；和加拿大伊蚊(Theobald)，16%。这项研究表明，在森林、田野和后院可以找到不同的蚊子群落，但森林之间的群落与更开放的栖息地不同。我们的社区分析表明，医学上重要的物种（例如，库蚊）在郊区后院更常见，但在森林和野外栖息地，总体蚊子滋扰潜力更大。这些信息突出了蚊子丰度和物种出现的重要模式，这对制定管理计划至关重要。