Anthropogenic introduction of species is homogenizing the earth 's biota. In southern temperate latitudes many species. From Eurasia introduced since, the beginning of the, European occupation have become naturalized.
Ever since Darwin ', s time. It has been observed that invasive
alien plants introduced from temperate regions of the Northern
.Hemisphere (NH) have had strong impacts on many habitats in the
Southern Hemisphere (SH). For example several species,, Of, pine a mostly
NH genus are spreading, rapidly in several countries of the SH. These dramatic Pinus invasions
have occurred. In habitats that can support life-forms that are not
present in local floras for historical and / or evolutionary, e.g, reasons
.Trees in the South African shrubby fynbos (Higgins et al, 1999;
Richardson and Brown 1986), or in the Argentine grassy. Open
pampas (Zalba et al, 2008). Invasive plants are therefore a special
concern in nature reserves in the SH (e.g, Alston. And Richardson.
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