3种转非抗虫基因棉花田间节肢动物群落的多样性和食物网结构

以转基因耐盐碱棉花、转基因抗病棉花和转基因抗旱棉花3种转非抗虫基因棉花为材料,研究不同表达性状的转基因棉花种植对棉田节肢动物群落结构、多样性及食物网结构的影响。结果表明,3种转基因棉花在节肢动物群落Shannon-Wiener多样性指数、Pielou均匀度和优势集中性指数上与其对照受体棉花无显著差异(P0.05)。转基因棉花与其对应受体间的群落相似性指数均较高(73.18%~77.65%),食物网结构参数上也无显著性差异(P0.05)。表明3种转非抗虫基因棉花对棉田节肢动物多样性及食物网结构无显著影响。

The Impact of Non-Bt Genetically Modified Cotton on the Community Diversity and Food-Web Structure of Arthropods

The influence of three genetically modified(GM) cotton lines, GM salt-tolerant cotton, GM disease-resistant cotton, and GM drought-resistant cotton, and their non-transgenic counterparts on the structure and diversity of arthropod communities and the food-web structure was investigated. No significant differences were found between GM cottons and their counterparts with respect to arthropod diversity, community evenness, or the dominant concentration index(P ＞0.05). There was also no significant difference in the basic characteristic values of the arthropod community foodweb between GM cottons and their counterparts(P ＞0.05). However, differences were observedbetween GM cottons and their counterparts regarding community similarity (73.18%-77.65%). These results show that the three GM cottons have no significant impact on the diversity or food-web structure of the arthropod community.