Effects of anthropogenic disturbance on species diversity and niche of dominant group in pollinators community

Species diversity is an index reflecting the complexity and stability of community function. We hypothesize that community structure and species diversity vary with the different densities of human disturbance. The effect of human disturbance on community can be directly reflected by the change of community structure and diversity. To study the status of species diversity and niche of dominant group in pollinators community in different types of anthropogenic disturbance, 24 sampling points were selected in field margin systems in hilly regions of western Henan. Yellow, white and blue traps were deployed, and mixture of approximately 200 mL of water and 1 drops of detergent was poured into the traps to capture pollination. The data were combined with the characteristics of local land use to analyze the effect of different disturbance types on diversity and niche of pollinators. We captured 18576 individuals of 14 order and 147 families, mainly belonged to Diptera, Hymenoptera, Coleoptera, Lepidoptera, Hemiptera and Thysanoptera. Hymenoptera, Coleoptera and Lepidoptera were selected as three kinds of main pollinators to be analyzed. The landscape types and actual observations was used to analyze. The results showed that the species diversity of different families of pollinating insects changed differently with the increasing disturbance intensity. An obvious decrease of the level of species diversity was found in Coleoptera. The niche breadth of Ceratopogonidae and Vespidae as dominant groups were higher than those of other groups, and the niche overlap with other species was higher under intermediate disturbance. No obvious correlation between niche breadth and niche overlap was found.