title: Brown planthopper Nilaparvata lugens was concentrated at the rear of the typhoon Soudelor in Eastern China in August 2015.
abstract: 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 (Stål) migrates northward or southward depending on wind direction, 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 modelling 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 summer 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.
authors.affiliation: College of Plant Protection, Nanjing Agricultural University, Nanjing, China.
authors.forename: Jian
authors.initials: J
authors.lastname: Ma
authors.affiliation: College of Plant Protection, Nanjing Agricultural University, Nanjing, China.
authors.forename: Ye-Chen
authors.initials: YC
authors.lastname: Wang
authors.affiliation: College of Plant Protection, Nanjing Agricultural University, Nanjing, China.
authors.forename: Yan-Yue
authors.initials: YY
authors.lastname: Hu
authors.affiliation: Division of Pest Forecasting, China National Agro-Tec Extension and Service Centre, Beijing, China.
authors.forename: Ming-Hong
authors.initials: MH
authors.lastname: Lu
authors.affiliation: College of Plant Protection, Nanjing Agricultural University, Nanjing, China.
authors.forename: Gui-Jun
authors.initials: GJ
authors.lastname: Wan
authors.affiliation: College of Plant Protection, Nanjing Agricultural University, Nanjing, China.
authors.forename: Fa-Jun
authors.initials: FJ
authors.lastname: Chen
authors.affiliation: Division of Pest Forecasting, China National Agro-Tec Extension and Service Centre, Beijing, China.
authors.forename: Wan-Cai
authors.initials: WC
authors.lastname: Liu
authors.affiliation: College of Plant Protection, Nanjing Agricultural University, Nanjing, China.
authors.forename: Bao-Ping
authors.initials: BP
authors.lastname: Zhai
authors.affiliation: College of Plant Protection, Nanjing Agricultural University, Nanjing, China.|Centre for Ecology and Conservation, University of Exeter, Penryn, Cornwall, UK.
authors.forename: Gao
authors.identifier: http://orcid.org/0000-0002-1000-5687
authors.initials: G
authors.lastname: Hu
mesh_terms: D063147:Animal Distribution; D025041:Animal Migration; D000818:Animals; D002681:China; D055867:Cyclonic Storms; D006430:Hemiptera / Q000254:growth & development / Q000502:physiology*; D009758:Nymph / Q000254:growth & development / Q000502:physiology; D011157:Population Dynamics
keywords: Nilaparvata lugens; WRF Model; insect migration; trajectory analysis; typhoon