Insect abundance over Chinese rice fields in relation to environmental parameters, studied with a polarization-sensitive CW near-IR lidar system

文献类型： 外文期刊

第一作者： Zhu, Shiming

作者： Zhu, Shiming;Li, Wansha;Li, Yiyun;Duan, Zheng;Svanberg, Katarina;Zhao, Guangyu;Svanberg, Sune;Malmqvist, Elin;Jansson, Samuel;Zhao, Guangyu;Brydegaard, Mikkel;Svanberg, Katarina;Svanberg, Sune;Feng, Hongqiang;Song, Ziwei;Brydegaard, Mikkel;Brydegaard, Mikkel;Svanberg, Sune

作者机构：

期刊名称：APPLIED PHYSICS B-LASERS AND OPTICS （ 影响因子：2.07； 五年影响因子：1.825 ）

ISSN： 0946-2171

年卷期： 2017 年 123 卷 7 期

页码：

收录情况： SCI

摘要： Effective monitoring of flying insects is of major societal importance in view of the role of insects as indispensable pollinators, destructive disease vectors and economically devastating agricultural pests. The present paper reports on monitoring of flying agricultural pests using a continuous-wave lidar system in a rice-field location in Southern China. Using a Scheimpflug arrangement, range resolution over several 100 m long observational paths was achieved. The system operates with two perpendicularly polarized near-infrared lasers, which are activated intermittently, and back-scattered radiation from insects was recorded by a linear array detector placed after a linear polarizer. Our polarization sensitive system was used to monitor the flying insect diurnal activity and also the influence of changes in weather conditions, e.g., the occurrence of rain. Activity strongly peaked at dusk and rose again, although to a lower extent, just before dawn. At the onset of rainfall, a strong increase in insect counts occurred which was interpreted as the rain-induced bringing down of high-altitude migrant insects.

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