Relation between extinction and assisted colonization of plants in the arctic-alpine and boreal regions.

摘要: Assisted colonization of vascular plants is considered by many ecologists an important tool to preserve biodiversity threatened climate change. I argue that assisted may have negative consequences in arctic-alpine and boreal regions. The observed slow movement toward the north has been argument for colonization. However, these range shifts be because microclimatic warming (ignored advocates colonization) smaller than macroclimatic warming. Arctic-alpine limited possibilities disperse farther or higher elevations. suggest species are more likely driven extinction competitive exclusion southern increasing temperatures. If so, future existence flora depend on delaying preventing migration allow northern evolve survive a warmer climate. In region, dispersal trees shrubs most method mitigate effects purported conservation benefits should not used promote invasive forestry.