Introduced species overlooked in biodiversity reporting

The reports on biodiversity are based on indicators that only take indigenous -- i.e. 'original' -- species into account for each region. Yet today modern environments are made up of indigenous and introduced species. The introductions are either deliberate or accidental. Although these introduced species play important roles, they are ignored by specialists, a fact that partly distorts the international nature reports. The study recommends that the contributions made by these species should be included.

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