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Brown planthopper Nilaparvata lugens was concentrated at the rear of the typhoon Soudelor in Eastern China in August 2015

引用

Insect Science 2018年第5期25卷 916-926页

作者： Jian Ma Ye-Chen Wang Yan-Yue Hu Ming-Hong Lu Gui-Jun Wan Fa-Jun Chen Wan-Cai Liu Bao-Ping Zhai Gao Hu College of Plant Protection Nanjing Agricultural University Nanjing China Division of Pest Forecasting China National Agro-Tec Extension and Service Centre Beijing China Centre for Ecology and Conservation University of Exeter Penryn Cornwall UK

Sometimes, extreme weather is vital for the population survival of migratory insects by causing sudden population collapse or outbreak. Several studies have shown that rice planthopper migration was significantly influenced by typhoons in eastern Asia. Most typhoons occur in the summer, especially in August. In August, brown planthopper Nilaparvata lugens （Stal） migrates northward or southward depending on wind direc- tion, and thus typhoons can potentially influence its migration process and population distribution. However, this has not yet been studied. This paper reported a case study on the effects of Typhoon Soudelor on the summer migration of N. lugens in eastern China in 2015. The migration pathways of N. lugens were reconstructed for the period under the influence of a typhoon by calculating the trajectories and migration events in eight counties of the Yangtze River Valley region with ancillary information. Trajectory mod- elling showed that most migrants took short distance migrations （less than 200 km） under the influence of the Typhoon Soudelor. Numerous N. lugens migrants were concentrated and deposited at the rear of the typhoon during the last 5 days of Typhoon Soudelor on August 9-13 due to horizontal convergence, and this led to an outbreak population. These results indicated that the N. lugens population was redistributed by the typhoon in the sum- mer and that the population dynamics at the rear of a typhoon should be kept under close surveillance. This study provided insight into migratory organisms adapting to atmospheric features.

关键词： insect migration Nilaparvata lugens trajectory analysis typhoon wrfmodel

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