Migration patterns and winter population dynamics of rice planthoppers in Indochina: New perspectives from field surveys and atmospheric trajectories
Migration patterns and winter population dynamics of rice planthoppers in Indochina: New perspectives from field surveys and atmospheric trajectories
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DOI：
10.1016/j.agrformet.2018.11.001
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发表时间：
2019-02
影响因子：
6.2
通讯作者：
Qiulin Wu;G. Hu;H. Tuan;Xiao Chen;Minghong Lu;B. Zhai;J. Chapman
中科院分区：
文献类型：
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作者：
Qiulin Wu;G. Hu;H. Tuan;Xiao Chen;Minghong Lu;B. Zhai;J. Chapman
稻飞虱是东亚地区水稻生产上最严重的害虫，每年夏季在中国、韩国和日本等国频繁发生。牠们无法在温带的东亚越冬，每年夏季牠们都会从东南亚向北迁徙。每年的迁徙周期通常被认为是一个封闭的循环，在秋季大量返回东南亚，但这段旅程和越冬动态的研究比春季移民少得多。先前的研究表明，越南中北部地区是中国春季殖民和每年秋季从中国南方接收返回移民的关键地点。然而，NCV经历了三个月的无稻休耕期在仲冬，所以它不能成为RPH种群的主要越冬区。在这项研究中，RPH在东亚的大陆规模的迁移模式进行了探索，使用的数据，从灯光陷阱渔获量，实地调查和大气轨迹模拟。我们的研究结果证实，每年秋季有大量的返回移民从中国南方到达NCV，但他们无法在那里过冬。NCV地区每年早春（2月中旬至3月中旬）由来自泰国东北部、老挝南部和越南中南部沿海冬季水稻种植区的移民在有利的高海拔天气风下运输。下一代从NCV的大量来源种群开始在东亚殖民。我们的研究结果提供了一个新的视角RPH迁移模式和越冬动力学在东亚，这是由作物生产，环境条件和天气风模式在大陆尺度。
Rice planthoppers (RPH) are the most serious insect pests of rice production in East Asia, frequently out-breaking in China, Korea and Japan each summer. They are unable to overwinter in temperate East Asia, and summer populations arise anew each year via northward spring migration from south-east Asia. The annual migration cycle is generally believed to be a closed loop with mass returns to south-east Asia in the autumn, but this leg of the journey and the overwintering dynamics are much less studied than the spring immigrations. Previous studies have indicated that the north-central Vietnam (NCV) region is a key location for both the spring colonisation of China and for receiving return migrants from southern China each autumn. However, NCV experiences a three-month rice-free fallow period during mid-winter, and so it cannot be the principal over-wintering region for RPH populations. In this study, the continental-scale migration patterns of RPH in East Asia were explored using data from light trap catches, field surveys and atmospheric trajectory simulations. Our results confirmed that large numbers of return migrants arrive in NCV from southern China each autumn, but that they are unable to survive there over winter. The NCV region is recolonised in the early-spring (mid-February to mid-March) of each year by migrants from winter rice-growing regions in north-east Thailand, southern Laos and south-central coastal Vietnam, which are transported on favourable high-altitude synoptic winds. The following generation initiates the colonisation of East Asia from a large source population in NCV. Our results provide a new perspective on RPH migration patterns and over-wintering dynamics in East Asia, which is governed by crop production, environmental conditions and synoptic wind patterns at a continental scale.