河谷地形对草地贪夜蛾种群迁移的生态学效应  

Ecological effects of river valley topography on the migration of Spodoptera frugiperda

作　　者：叶辉[1] 李永萍 冯丹 徐全元 YE Hui;LI Yong-ping;FENG Dan;XU Quan-yuan(School of Ecology and Environmental Science,Yunnan University,Kunming 650091,Yunnan,China;School of Agriculture,Yunnan University,Kunming 650091,Yunnan,China;Yunnan Academy of Forestry and Grassland,Kunming 650201,Yunnan,China;School of Big Data and Intelligent Engineering,Southwest Forestry University,Kunming 650224,Yunnan,China)

机构地区：[1]云南大学生态与环境学院,云南昆明650091 [2]云南大学农学院,云南昆明650091 [3]云南省林业和草原科学院,云南昆明650201 [4]西南林业大学大数据与智能工程学院,云南昆明650224

出　　处：《云南大学学报（自然科学版）》2022年第1期188-194,共7页Journal of Yunnan University(Natural Sciences Edition)

基　　金：云南省重点领域科技计划(202001BB050002)。

摘　　要：草地贪夜蛾属世界性重大农业迁飞害虫,扩散迁移是草地贪夜蛾得以大范围危害的主要原因,地表形态对其迁移过程具有深刻影响.作者首次就河谷这一特殊地表形态对云南草地贪夜蛾种群迁移的生态学效应进行了系统探究.研究发现,纵向河谷作为典型的生态廊道对草地贪夜蛾南北迁移,具有显著的通道作用;河谷两岸山脉形成物理屏障阻滞甚至阻挡了草地贪夜蛾东西向扩散,表现出明显的阻隔效应;河谷低海拔区热量充沛为草地贪夜蛾越冬提供了庇护,显示出明显的汇聚效应.分析认为,河谷生态学效应是河谷地形地貌及所蕴含的如气温、气流、玉米种植等多种因素综合作用的结果,对云南草地贪夜蛾迁移过程和时空分布格局具有深刻影响.基于草地贪夜蛾在云南不同河谷区域条件下的发生发展过程,提出了针对性的防控策略,对于云南草地贪夜蛾区域监测与防控具有现实指导意义.Fall army worm(FAW), Spodoptera frugiperda is a major agricultural migratory pest worldwide,and migration is the key reason for the widespread damage which was profoundly affected by the topography. The specific ecological effect of river valleys on the migration of FAW in Yunnan was studied, and the results showed that:(1) The longitudinal valley, as a typical ecological corridor, has a significant channel effect on the migration of FAW from south to North.(2) The mountains on both sides of the valley hindered the crosswise spread of FAW,forming an obvious physical barrier.(3) The higher heat accumulation in the low altitude area of the valley provides overwintering sites of FAW, showing an obvious convergence effect. It is concluded taht the topography of the river valley has some specific ecological effects, which caused by the comprehensive impacts originated from temperature, airflow, and corn planting in valley, and the ecological effects had far-reaching influence on the migration and spatiotemporal distribution of FAW in Yunnan. This study has important guiding value for the regional control of FAW in Yunnan as it brings forward targeted control strategies based on the occurrence and development process of FAW in different river valleys.

关 键 词：草地贪夜蛾 河谷生态学效应 通道效应 阻隔作用 汇聚效应 

分 类 号：S433.4[农业科学—农业昆虫与害虫防治]