Exotic trees

Exotic Mammals Disperse Exotic Fungi That Promote Invasion by Exotic Trees

Biological invasions are often complex phenomena because many factors influence their outcome. One key aspect is how non-natives interact with the local biota. Interaction with local species may be especially important for exotic species that require an obligatory mutualist, such as Pinaceae species that need ectomycorrhizal (EM) fungi. EM fungi and seeds of Pinaceae disperse independently, so ...

Diseases of Forest Trees: Consequences of Exotic Ecosystems?

MUCh attention is now given to risks and impacts of exotic pest introductions in forest ecosystems. This concern is for good reason because, once introduced, an exotic pathogen or insect encounters little resistance in the native plant population and can produce catastrophic losses in relatively short periods of time. Most native fungal pathogens of forest trees have co-evolved for eons with th...

Exotic Atoms and Exotic Nuclei

Biosecurity Implications of Exotic Beetles Attacking Trees and Shrubs in New Zealand

A survey of exotic beetles that attack trees or shrubs in New Zealand found 51 species of mainly Australian (58%) and European (25%) origin. In addition, three biological control agents have been released against woody adventive plant pests. The host range of most species is restricted to exotic crop and ornamental plants in New Zealand. Nine polyphagous borers sometimes attack dead wood of ind...

Early growth of native and exotic trees planted 4 on degraded tropical pasture

11 12 Abstract 13 14 Our goal was to assess the potential of two exotic and five native tree species in reestablishing trees to degraded land in the 15 humid tropics of southern Costa Rica. Our study site was deforested in the 1950s. Steep topography and high rainfall led 16 subsequently to severe erosion, which exposed nutrient-poor, acid, unproductive subsoil. Our site is typical of many trop...