In a new study, researchers from Penn State have uncovered exactly how dangerous Ailanthus is, calling it an invasive triple threat. But what is this weird tree? Native to much of China, Ailanthus – ...

Willow trees are distinctly male or female, necessitating 'interaction' between the sexes for reproduction. They rely heavily on external forces, such as wind, insects, birds to transfer pollen from ...

Despite the typically low population densities and animal-mediated pollination of tropical forest trees, outcrossing and long-distance pollen dispersal are the norm. We reviewed the genetic literature ...

The population density of reproductive individuals (‘population density’ for short) is central in the context of sustainability of tree resources under selective logging practices. Harvesting implies, ...