摘要
研究多年种植转Bt基因棉花对棉田节肢动物群落昆虫结构与组成、生物多样性的影响,明确其变化趋势,可为棉田害虫综合治理与生态调控、转Bt基因棉花环境安全性评价提供科学借鉴。于2009—2013年连续5年对转Bt基因棉花中棉所41和非转基因棉花中棉所49棉田节肢动物群落进行了系统调查,并结合5a气象因子的变化,分析了5年内棉田节肢动物群落相关参数的变化趋势。结果分析表明,2009—2013年中棉所41棉田昆虫群落、害虫亚群落和天敌亚群落所属目数有所上升,但差异不显著;所属科数、物种数、个体总数均呈现先上升后下降的趋势,个别年份差异显著,其余年份基本保持不显著的波动水平;昆虫群落和害虫亚群落多样性指数呈下降的趋势,至2013年下降达到显著水平,其余年份之间差异不显著,天敌亚群落多样性指数无显著变化;昆虫群落、害虫亚群落和天敌亚群落均匀性指数无显著变化;昆虫群落和害虫亚群落优势集中性指数有所上升,至2013年差异达到显著水平,天敌亚群落优势集中性各年份间无显著变化;与中棉所49棉田相比,相同年份中棉所41棉田昆虫群落、害虫亚群落和天敌亚群落结构与组成、多样性指数、均匀性指数和优势集中性指数均无显著差异。可见,短期内非剧烈天气变化对转基因棉田节肢动物群落、害虫亚群落和天敌亚群落在结构与组成、生物多样性方面没有明显的影响。
In this study, effects of transgenic Bt cotton on the structure, composition, and biodiversity of arthropod communities were systematically investigated in cotton fields over five consecutive years, from 2009 to 2013. Non-transgenic cotton ＇ CCRI 49＇ was used as the control, and transgenic Bt cotton ＇ CCRI 41 ＇ was used as the test material. Effects of transgenic Bt cotton on arthropod communities provide an important theoretical basis for the comprehensive management of cotton insect pests and ecological control, as well as a scientific reference for the evaluation of the environmental safety of transgenic Bt cotton. In addition, sustainable development and use, which are in accordance with ecological succession, can be adopted on the basis of production and need for pest control in cotton plants. In this study, arthropod communities were systematically investigated in transgenic Bt cotton ＇ CCRI 41 ＇ and conventional cotton ＇ CCRI 49＇ fields, from 2009 to 2013. In addition, meteorological factors during these five consecutive years were considered when analyzing the changing trends of relevant factors in the cotton field arthropod communities. The results showed that, during 2009--2013, the number of ＂orders＂ in the insect community, pest sub-community, and natural enemy sub-community in the ＂CCRI 41＂ cotton fields increased in comparison with the control cotton fields, but the differences were not significant. The number of ＂families,＂ ＂species,＂ and ＂total number of individuals＂ showed an increasing trend over the first 3 years and then declined in the last 2 years （2012 and 2013 ）. The differences were significant in some years, which might be due to the meteorological conditions, while fluctuations were within statistical limits in other years. The diversity indices of the insect and pest sub-communities showed declining trends, which were statistically significant in 2013 but not significant in the other years. There was no significant change in the diversity index o
出处
《生态学报》
CAS
CSCD
北大核心
2016年第13期4195-4203,共9页
Acta Ecologica Sinica
基金
转基因重大专项资助项目(2014ZX08011-002)
