Swarms of brown planthopper migrate into the lower Yangtze River Valley under strong western Pacific subtropical highs
Swarms of brown planthopper migrate into the lower Yangtze River Valley under strong western Pacific subtropical highs
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西太平洋副热带高压影响下成群褐飞虱迁徙至长江下游
DOI：
10.1002/ecs2.1967
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发表时间：
2017-10-01
期刊：
影响因子：
2.7
通讯作者：
Hu, Gao
中科院分区：
文献类型：
--
作者：
Lu, Ming-Hong;Chen, Xiao;Hu, Gao
昆虫的风媒迁移受气象因素和现象的影响很大，如季节性大气环流。大规模的空气运动为所有天气和气候事件提供了背景。因此，迁徙昆虫的种群丰度可能会因季节性大气环流的变化而波动，但对这一过程知之甚少。西太平洋副热带高压是影响东亚地区天气气候的主要环流系统。对褐飞虱（Nilaparvata lugens [Stal]）在东亚地区的年迁飞和西太平洋夏季风进行了研究。根据近30年的资料（1977-2003年），它被确定为成群的迁移到长江下游的7月，并形成一个爆发种群在强西太平洋副热带高压条件下。一股强烈的西太平洋副高增强了华南的西南气流，为褐飞虱的长距离迁移提供了高速的动力。此外，长江和淮河流域降水增加，形成雨带屏障，迫使BPH在长江下游登陆。本文的结果表明，种群数量的迁飞昆虫的季节性大气环流引起的气候条件的波动。
Windborne migration of insects is significantly influenced by meteorological factors and phenomena, such as seasonal atmospheric circulation. Large-scale movement of air provides the background for all weather and climate events. Hence, population abundances of migratory insects may fluctuate due to variations in seasonal atmospheric circulation, but little is known about this process. The western Pacific subtropical high pressure (WPSH) is the major circulation system that affects weather and climate in eastern Asia. Annual migration of the brown planthopper (BPH, Nilaparvata lugens [Stal]) in East Asia and the WPSH was investigated. Based on almost three decades of data (1977–2003), it was determined that swarms of BPH migrate into the lower Yangtze Valley in July and form an outbreak population under strong WPSH conditions. An intense WPSH enhanced southwesterly airstreams in southern China to provide a high-speed vehicle promoting BPH long-distance migration. In addition, increased precipitation in the Yangtze and Huai valleys formed a rain-belt barrier that forced BPH landing in the lower Yangtze Valley. Results herein demonstrate that the population abundance of a migratory insect fluctuated in response to climatic conditions caused by seasonal atmospheric circulations.