Diversity of arthropod communities in transgenic Bt cotton and nontransgenic cotton agroecosystems
Diversity of arthropod communities in transgenic Bt cotton and nontransgenic cotton agroecosystems
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DOI：
10.1603/0046-225x-32.2.270
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发表时间：
2003-04-01
影响因子：
1.7
通讯作者：
Yardim, EN
中科院分区：
文献类型：
--
作者：
Men, XY;Ge, F;Yardim, EN
通过3年的田间试验，采用指数法研究了转Bt基因棉花对棉田节肢动物群落、害虫和天敌的影响。治疗包括：1）未经杀虫剂处理的非转基因棉花（非转基因），2）经杀虫剂处理的非转基因棉花（非转基因+杀虫剂），3）转Bt基因棉花。转Bt基因棉（Bt棉+杀虫剂）。结果表明，转Bt基因棉提高了节肢动物群落和害虫亚群落的多样性，但降低了天敌亚群落的多样性。在转基因抗虫棉和非转基因抗虫棉农业生态系统中，除草剂处理增加了节肢动物群落和亚群落的多样性，但这种增加可能是通过除草剂目标物种的死亡率增加均匀度的所有人为因素。
In a 3-yr field experiment, possible effects of Bt transgenic cotton plants expressing cry1A(c) gene from Bacillus thrungiensis Berliner variety kurstaki on diversities of arthropod communities and pest and natural enemy were assessed in insecticide treated and untreated cotton fields,as measured by index. The treatments included: 1) nontransgenic cotton with no insecticide treatment (nontransgenic), 2) nontransgenic cotton with insecticide treatments (nontransgenic + insecticide) 3) transgenic Bt. cotton with no insecticide treatment (Bt-cotton) and 4) transgenic Bt-cotton with insecticide treatmements (Bt-cotton+insecticide). The results indicated that Bt-cotton increascd the diversity of arthropod communities and pest sub-communities: however, it decreased the diversities of natural enemy subcommunities. Insecticide treatments increased diversities of communities and sub-communities of arthropods in both transgenic Bt-cotton and nontransgenic cotton agroecosystems, but the increase may be all artifact of increased evenness through mortality of insecticide-targeted species.