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Source and spread dynamics of mountain pine beetle in central Alberta, Canada
The Canadian Entomologist ( IF 0.9 ) Pub Date : 2021-02-24 , DOI: 10.4039/tce.2020.83
Victor A. Shegelski , Erin O. Campbell , Kirsten M. Thompson , Caroline M. Whitehouse , Felix A.H. Sperling

The mountain pine beetle (Dendroctonus ponderosae Hopkins) (Coleoptera: Curculionidae) is a significant destructive force in the pine forests of western Canada and has the capacity to spread east into a novel host tree species, jack pine (Pinaceae). New populations have been documented in central Alberta, Canada, but the source populations for these outbreaks have yet to be identified. In this study, we use genetic data to identify parent populations for recent outbreak sites near Slave Lake, Lac La Biche, and Hinton, Alberta. We found the northern population cluster that entered Alberta near Grande Prairie was the source of the most eastern established population near Lac La Biche, and the range expansion to this leading-edge population has been too rapid to establish evidence of population structure. However, some dispersal from a population in the Jasper and Hinton area has been detected as far north and east as Slave Lake, Alberta. We also identified two potential source populations for the current outbreak in Hinton: most beetles appear to be from Jasper National Park, Alberta, but some also originated from the northern population cluster. These findings demonstrate the dynamic dispersal capabilities of mountain pine beetle across the Alberta landscape and the potential hazard of increased dispersal to newly established leading-edge populations.



中文翻译:

加拿大艾伯塔省中部的山松甲虫的来源和传播动态

山松甲虫(蠹蠹霍普金斯(鞘翅目:Curculionidae)是加拿大西部松树林中的重要破坏力,具有向东传播成新型寄主树种杰克松(Pinaceae)的能力。在加拿大艾伯塔省中部有新的种群记录,但尚未确定这些暴发的来源种群。在这项研究中,我们使用遗传数据来识别奴隶湖,拉克比奇和艾伯塔省欣顿附近最近爆发地点的父母种群。我们发现,在大草原城附近进入艾伯塔省的北部人口集群是拉比奇附近最东部的固定人口的来源,而且对这一前沿人口的范围扩展太快,无法建立人口结构的证据。然而,在贾斯珀和欣顿地区的人口中,有一些散布在北部和东部,例如艾伯塔省的奴隶湖。我们还确定了当前在欣顿爆发的两个潜在来源种群:大多数甲虫似乎来自艾伯塔省的贾斯珀国家公园,但也有一些起源于北部种群。这些发现证明了山松甲虫在艾伯塔省景观中的动态扩散能力,以及对新近建立的前沿种群扩散的潜在危害。

更新日期:2021-04-30
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