Do Alien Plants Reduce Insect Biomass?
Alien plants, defined here as species whose evolutionary history ocurred elsewhere, are replacing native vegetation in natural ecosystems and anthropogenic landscapes throughout North America (Williamson 1996; Mooney & Hobbs 200; Pimentel et al. 2000). At least 5000 alien plant species have been introduced to the United States, either intentionally or by accident. HUndreds are now well established in natural ecosystems, but many more reside as ornamentals in managed gardens.