Impacts of invasive ant-hemipteran interaction, edge effects and habitat complexities on the spatial distribution of ants in citrus orchards

•Linepithema humile was the most abundant ant found, found at 100 % of sites.•Ant activity rates were 39 % higher where Asian citrus psyllid was present, however total ant species richness declined.•Ant activity rates increased by 26 % at the perimeter of the groves compared to the interior of the grove.•Ant activity rates were 32 % higher at complex edges than at simple edges located around the perimeter of the grove.