Nonparametric Estimation of Interspecific Spatio-Temporal Niche Separation Between Two Lady Beetles (Coleoptera: Coccinellidae) in Bt Cotton Fields
文献类型： 外文期刊
作者： Lu, Zeng-Bin 1 ; Shi, Pei-Jian 2 ; Reddy, Gadi V. P. 4 ; Li, Lin-Mao 1 ; Men, Xing-Yuan 1 ; Ge, Feng 3 ;
作者机构： 1.Shandong Acad Agr Sci, Inst Plant Protect, Jinan 250100, Peoples R China
2.Nanjing Forestry Univ, Bamboo Res Inst, Nanjing 210037, Jiangsu, Peoples R China
3.Chinese Acad Sci, Inst Zool, State Key Lab Integrated Management Pest Insects, Beijing 100101, Peoples R China
4.Montana State Univ, Western Triangle Ag Res Ctr, Conrad, MT 59425 USA
关键词： Harmonia axyridis;Propylea japonica;intraguild predator;poisson process
期刊名称：ANNALS OF THE ENTOMOLOGICAL SOCIETY OF AMERICA （ 影响因子：2.099； 五年影响因子：1.884 ）
ISSN：
年卷期：
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收录情况： SCI
摘要： Predaceous lady beetles are important natural enemies of many insect pests in agroecosystem. The altered agricultural practices associated with widespread adoption of Bt cotton may have potential effects on the spatio-temporal patterns of predaceous lady beetles, as the composition and abundance of nontarget sucking pests have been changed in Bt cotton fields. In the current study, the spatio-temporal patterns of two important lady beetles, Harmonia axyridis ( Pallas) ( Coleoptera: Coccinellidae) and Propylea japonica ( Thunberg) ( Coleoptera: Coccinellidae), were surveyed in Bt cotton fields. A nonparametric method associated with Monte Carlo tests was used to address and test whether niche segregation occurred between H. axyridis and P. japonica. The results showed that the dominant region occupied by P. japonica was toward northeast across the season, whereas H. axyridis had higher presence to the southwest. The temporal patterns of H. axyridis and P. japonica also differed significantly, and the highest levels of each species occurred in different locations from each other on each sampling date in the same Bt cotton fields. In total, there were strong spatio-temporal separation patterns between these two species in Bt cotton fields. These spatio-temporal patterns may produce complementary impacts on prey, and this in turn could be used to strengthen the biological control of insect pests by these two lady beetles.
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