摘要
昆虫的种群动态和数量分布与环境因素密切相关。本研究通过在中国南方空心莲子草大规模入侵的区域分别设置水、陆样地,采用曲线回归和冗余分析等方法探讨了异质生境中空心莲子草形态特征、入侵群落植物多样性及无机环境对生防昆虫莲草直胸跳甲数量分布的影响。结果显示:水、陆两境中莲草直胸跳甲数量均随着空心莲子草株高增加而上升;莲草直胸跳甲数量随水生型空心莲子草分枝数及入侵盖度的增加而上升。莲草直胸跳甲数量与陆生群落植物物种多样性无显著相关性,但在水生环境中,莲草直胸跳甲数量随群落的Simpson、Shannon和Pielou指数上升而显著下降。水、陆两境中决定莲草直胸跳甲数量的主导性环境因子均为年均气温、纬度和海拔。研究结果可为入侵植物的生物防治及引进天敌提供参考。
The insect population dynamics and quantity distribution are closely related to environmental factors. In this study, we set up aquatic and terrestrial plots in locations that were invaded largely by alien Alternanthera philoxeroides in Southern China, by using the curvilinear regression and redundancy analysis methods;we analyzed the influences of A.philoxeroides morphological characteristics, plant species diversity within invaded community and inorganic environmental factors on the population abundance of an biocontrol insect Agasicles hygrophila in heterogeneous habitats. The results showed that the A. hygrophila abundance increased with the increasing A.philoxeroides height in both aquatic and terrestrial habitats, and increased with A.philoxeroides branches and invasion coverage only in the aquatic habitat. The A.hygrophila abundance had no significant relationships with the terrestrial plant species diversity;however, it significantly decreased with the rising Simpson, Shannon, Pielou indices in aquatic invaded plant community. In addition, the dominant environmental factors which determined the A.hygrophila abundance were annual mean temperature, latitude and elevation in both aquatic and terrestrial habitats. Our research could provide suggestive references for biological control of invasive plants and introduction of natural enemies.
作者
吴昊
代文魁
蔡水清
安佳乐
王笑笑
WU Hao;DAI Wenkui;CAI Shuiqing;AN Jiale;WANG Xiaoxiao(College of Life Sciences, Xinyang Normal University, Xinyang 464000, China;Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China;Research Center for Resource Insects and Biotechnology, Guangdong Institute of Applied Biological Resources, Guangzhou 510260, China)
出处
《植物保护》
CAS
CSCD
北大核心
2019年第3期41-48,共8页
Plant Protection
基金
信阳师范学院"南湖学者奖励计划"青年项目
信阳师范学院博士科研启动基金项目(18093)
信阳师范学院重大课题预研项目(17212)
中国科学院武汉植物园知识创新工程项目(Y455437H05)
关键词
环境因子
莲草直胸跳甲
种群数量
生物入侵
冗余分析
environmental factor
Agasicles hygrophila
population abundance
biological invasion
RDA
