Social empires facebook8/31/2023 ![]() ![]() The study shows that this process is equally important as other drivers of the spread of alien species, such as socio-economic development or population density in a region, that explain how alien plant species are distributed today. Hence, the set of species exchanged between regions was restricted to the extent of the empire and consequently the regions became more similar in their floras compared to outside regions - a process that intensified with the length of time a region was occupied by the empire," says Bernd Lenzner, the lead author of the study. ![]() "The European empires restrictive trade policies ensured that plants were predominantly traded between regions occupied by the same power. The longer a region was occupied by an empire, the more similar the alien floras In particular, many plant species were introduced to and from the colonized regions for food, fodder or horticulture and have over time established 'alien floras' in these region. Back then, European powers introduced species mainly for economic reasons in order to ensure the survival of their population and to foster the establishment of settlements, next to aesthetic and nostalgic reasons. species originally not native in a specific geographic region, is closely linked to human movement which accelerated with the onset of European exploration and colonialism in the late 15th century. The global redistribution of 'alien species', i.e. ![]()
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