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Scientia Silvae Sinicae ›› 2018, Vol. 54 ›› Issue (10): 73-79.doi: 10.11707/j.1001-7488.20181009

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Comparative Analysis of Arthropod Communities in Transgenic Bt and Non-Transgenic Poplar-Cotton Composite Systems

Jiang Wenhu1, Zhang Dejian1,2, Liu Junxia1,4, Li Chaoli1, Lu Zhanyuan3, Yang Minsheng1,4   

  1. 1. Forestry College, Agricultural University of Hebei Baoding 071001;
    2. College of Life Sciences, Inner Mongolia University Huhhot 010021;
    3. Inner Mongolia Academy of Agriculture and Animal Husbandry Science Huhhot 010031;
    4. Hebei Province Key Laboratory of Forest Germplasm Resources and Protection Baoding 071000
  • Received:2016-12-17 Revised:2018-03-21 Online:2018-10-25 Published:2018-11-03

Abstract: [Objective] This study aims to analyse the composition and structure of arthropod community in the Bt gene poplar-cotton composite system,in order to evaluate ecological safety of transgenic poplar-cotton composite system.[Method] The non-transgenic poplar-cotton composite system Ⅰ and transgenic poplar-cotton composite system Ⅱ were constructed in a forest farm at Guojiawu village,Yihezhuang town,Zhuozhou City of Hebei Province.The composition and structure of arthropod community,sub community and different functional groups as well as community time dynamic changes were investigated for three consecutive years by using the method of community ecology.[Result] The two systems had significant differences in the total number of species in arthropod communities, and there was no significant difference in the total number of species and the diversity index.The number of pest sub-community species in the transgenic poplar-cotton composite system was significantly lower than that of the control(P<0.05),while species number of natural enemy sub-community and neutral arthropod sub-community was not significant; the diversity indices of pests,natural enemies, and neutral arthropod sub-communities in the two systems were not significantly different.There were no significant difference in the temporal and seasonal dynamics of species and individuals in arthropod communities between the two systems.[Conclusion] Transgenic poplar cotton composite system had better toxicity and control population effect to target pests, and had no obvious effect on non-target insects, natural enemies and neutral insects, but showed a relatively good ecological effect on these functional groups.Generally speaking, transgenic poplar-cotton composite system had no negative effect on arthropod community, and played a role in promoting the function of the whole ecosystem, however its ecological safety needs to be monitored for a long time.

Key words: transgenic organism, poplar-cotton ecosystem, arthropods, community structure, forest insect, biosafety

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