| 转Bt基因棉田节肢动物群落营养层及优势功能团的组成与变化 |
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| 引用本文： | 刘万学,万方浩,郭建英.转Bt基因棉田节肢动物群落营养层及优势功能团的组成与变化[J].生态学报,2002,22(5):729-735. |
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| 作者姓名： | 刘万学 万方浩 郭建英 |
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| 作者单位： | 中国农业科学院生物防治研究所,农业部农作物病虫草害生物防治资源研究与利用重点实验室,北京,100081 |
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| 基金项目： | 国家重点基础研究发展规划资助项目 ( G2 0 0 0 0 1 6 2 0 9)，国家“十五”科技攻关计划重大专项资助项目
( 2 0 0 2 BA5 1 6 A0 1 ) |
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| 摘 要： | 1998年在河北南皮棉区转Bt基因棉棉田和常规棉综防田的生物群落变化的研究表明，与常规棉综防田相比，转Bt基因棉棉田的节肢动物种类增加30.7%，功能团多样性增加66.9%，天敌类和中性节肢动物类的丰富度分别增加97.6%和158.0%，害虫类的丰富度减少45.7%。就功能团的种群数量来看，主要害虫棉铃虫、蚜虫和蓟马种群数量分别减少98.9%、69.0%和72.6%；而次要害虫害蝽、粉虱、叶蝉类昆虫的种群数量分别增加了2.2、3.2和14.8倍，棉花生长中期，转Bt基因棉棉田中的基位物种丰富度大于中位和顶位物种；常规棉田中的差异则更大，出现天敌控制“空缺”。综合分析表明，转Bt基因棉棉田生态系统比常规棉综防田稳定；转Bt基因棉棉田的中性节肢动物和次要害虫在害虫－天敌的营养链中起到了重要的调控作用。
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| 关 键 词： | 转Bt基因棉田 节肢动物群落 营养层 功能团 丰富度 多样性 |
| 文章编号： | 1000-0933(2002)05-0729-07 |
| 收稿时间： | 6/3/2000 12:00:00 AM |
| 修稿时间： | 2001/5/10 0:00:00 |
Structure and Seasonal Dynamics of Arthropods in Transgenic Bt Cotton Field |
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| LIU Wanxue,WAN Fanghao and GUO Jianying.Structure and Seasonal Dynamics of Arthropods in Transgenic Bt Cotton Field[J].Acta Ecologica Sinica,2002,22(5):729-735. |
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| Authors: | LIU Wanxue WAN Fanghao and GUO Jianying |
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| Institution: | Key Laboratory of Bio-control; Resources and Utilization; MOA; Institute of Biological Control; Chinese Academy of Agricultural Sciences; Beijing; China |
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| Abstract: | To understand the ecological impacts of the transgenic Bt (CryI(c)) cotton on natural enemies of the target pest, Helicoverpa armigera (Hübner), and non-target arthropods in cotton fields, a systematic survey was made in a transgenic (Bt) and a conventional cotton field in Nanpi county, Hebei Province in 1997. Both plots were about 0.3 hm 2. All arthropod species and their numbers were recorded by visual observation on 100 plants in 10 standard sampling spots between May and October at five-day intervals. ... |
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| Keywords: | transgenic Bt cotton arthropod community nutritional classes functional groups abundance diversity |
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