Berlin, Nov 21: A unique three year research project has determined that there are more than 11,000 alien species present in Europe, that have biologically invaded the continent.
Known as DAISIE (Delivering Alien Invasive Species Inventory for Europe), the research project, with more than 100 European scientists, provides new knowledge on biological invasions in Europe.
Biological invasions by alien species often result in a significant loss in the economic value, biological diversity and function of invaded ecosystems.
Alien species are plants, animals and micro-organisms that have been moved by humans to new environments outside of the range they occupy naturally.