Ecological correlates of local extinction and colonisation in the British ladybird beetles (Coleoptera: Coccinellidae)

摘要: Five main drivers of population declines have been identified: climate change, habitat degradation, invasive alien species (IAS), overexploitation and pollution. Each these interacts with the others, also intrinsic traits individual species, to determine species’ distribution range dynamics. We explored relative importance life-history resource-use traits, climate, habitat, IAS Harmonia axyridis in driving local extinction colonisation dynamics across 25 ladybird (Coleoptera: Coccinellidae).Species were classified as continually present, absent, extinct, or colonising each 4,642 1-km2 grid squares. The spatial events (in squares) all ranges related ecological overlap H. axyridis, factors within generalised linear models (GLMs). GLMs used relate characteristics, niche rates summarised at level. Bayesian model averaging was account for uncertainty, produce reduced sets which well-supported by data. Species a high degree suffered higher both analyses, while scale extinctions more likely colonisations less areas proportion urban land cover. In analysis, polymorphic large sizes colonise go sunny squares be colonised. Large, multivoltine rainy conclusion ladybirds, are influenced several factors. only factor that increased likelihood cover, greatly rates. Continued spread is adversely affect native may particularly vulnerable.