Spatiotemporal dynamics of introduced bark beetles: resource competition, invasion risk and management

The movement and establishment of invasive species in new habitats is a global economic and ecological problem. The increased trade among countries and continents has increased the chances of introductions of new species. Once alien pest species have beco me established in their new habitats, they may be extremely difficult to eradicate, and the costs of damages and control programmes may be very high. The present project is a contribution to pre-emptive competence building in order to reduce the risk of s pread and establishment of invasive forest pests, using the Norway spruce - bark beetle system as an example. In Norwegian forestry, the extensive timber imports represent a potential introduction pathway for harmful organisms, such as aggressive bark bee tles, that may prove to be a serious setback for forestry. Our preliminary investigations of import timber have shown that alien bark beetle species occur in imported shipments and may hibernate at timber storages. In this project we intend to assess the potential spread and impact of alien bark beetles. Because direct experiments with introduced species are too dangerous, we will use a combination of data analysis and modelling. We have brought together a strong team of researchers with the necessary com plementary expertise in bark beetle ecology, modelling and biological invasions . The budget includes a recruitment fellowship as a part of the competence building on invasive species. The final results will include recommendations for possible changes in import routines and forest management that may reduce the spread and establishment of damaging and costly forest pests.