Local and landscape determinants of pollen beetle abundance in overwintering habitats

摘要: The development of integrated pest management strategies requires that the semi-natural habitats scattered across landscape are taken into account. Particular determinants insect abundance in overwintering just before they migrate onto crops appear to be poorly known and crucial importance for understanding patterns crop colonization population dynamics at scale. emergence pollen beetle Meligethes aeneus F. was studied grassland, woodland edge interior over a 3-year survey France using macro-emergence traps. A suite variables local scale assessed each trap, aiming identify potential relevant habitat indicators. effects characteristics were evaluated partial least square regressions. It found M. can overwinter all types but particular scales may explain their sites more than habitat: relative altitude, litter thickness, soil moisture proximity previous year's oilseed rape fields positively correlated with adults 3 years. Hence, emerged beetles depends on both configuration around characteristics. Landscape determine flow towards late summer, influence survival rates during winter. findings present study provide valuable insight role as source pests, spring, abundance.