Flight periodicity and the vertical distribution of high-altitude moth migration over southern Britain
Flight periodicity and the vertical distribution of high-altitude moth migration over southern Britain
复制标题
英国南部高空飞蛾迁徙的飞行周期和垂直分布
DOI：
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发表时间：
2009
影响因子：
1.9
通讯作者：
Jason W Chapman
中科院分区：
文献类型：
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作者：
Curtis R. Wood;Don R Reynolds;P. M. Wells;J. Barlow;I. Woiwod;Jason W Chapman
在英国，昆虫监测雷达的连续运行首次使我们能够对与北方欧洲这一地区的大型昆虫高空迁移相关的各种现象进行表征。以前的研究采取了个案研究的方法，集中在少数特别感兴趣的夜晚。在这里，结合来自两个雷达的数据，并从一个广泛的吸力和光陷阱网络，我们进行了一个更系统的，长期的研究，昼夜飞行周期和大气中的大型昆虫的垂直分布。首先，我们确定昆虫丰度和分层的一般特征，发生在24小时的周期，出现在英国南部的夏季四年的雷达数据汇总。这些特征包括黄昏时的大规模迁移，以及在较小程度上，黎明和白天与热对流有关的浓度。然后，我们将注意力集中在傍晚形成的大型夜间迁徙者的明确层次上，通常在地面以上200-500米的高度。我们提出的证据，从雷达和陷阱的数据，这些夜间层主要是由夜蛾，物种，如Noctua pronuba，Autographa gamma，小地老虎exclamationis，A。segetum，黑穗木（Xestia c-nigrum）和细叶金菇（Phlogophora meticulosa）占优势。
Abstract The continuous operation of insect-monitoring radars in the UK has permitted, for the first time, the characterization of various phenomena associated with high-altitude migration of large insects over this part of northern Europe. Previous studies have taken a case-study approach, concentrating on a small number of nights of particular interest. Here, combining data from two radars, and from an extensive suction- and light-trapping network, we have undertaken a more systematic, longer-term study of diel flight periodicity and vertical distribution of macro-insects in the atmosphere. Firstly, we identify general features of insect abundance and stratification, occurring during the 24-hour cycle, which emerge from four years' aggregated radar data for the summer months in southern Britain. These features include mass emigrations at dusk and, to a lesser extent, at dawn and daytime concentrations associated with thermal convection. We then focus our attention on the well-defined layers of large nocturnal migrants that form in the early evening, usually at heights of 200–500 m above ground. We present evidence from both radar and trap data that these nocturnal layers are composed mainly of noctuid moths, with species such as Noctua pronuba, Autographa gamma, Agrotis exclamationis, A. segetum, Xestia c-nigrum and Phlogophora meticulosa predominating.