Clear-cuts are temporary habitats, not matrix, for endangered grassland burnet moths ( Zygaena spp.)

摘要: Burnet moths (Zygaena spp.) are day-flying Lepidoptera considered indicative of species-rich grasslands. In the present study, our aim was to clarify whether clear-cuts habitat, supporting habitat or matrix for three species Zygaena. We did so by sampling these with sex pheromones on 48 clear-cuts, varying in amount host and nectar plants, southern Sweden. To compare efficiency such sampling, we also conducted transect walks clearcuts. Overall, host-plants best explained abundance Zygaena spp. recorded, better than nectar-plants connectivity nearby These results indicate that an plants used as a fully functional not sense only providing nectar. There is no support considering inert matrix. With about half work-effort, pheromone traps recorded 100 times more walks. The poor correspondence between observations during transects trap catches suggest being difficult monitor contrast grasslands, short-term nature requiring repeated recolonization, indicating importance permanent However, important temporary insect habitats due their great acreage, suitable management can increase time they remain habitat.