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No saturation in the accumulation of alien species worldwide.

Seebens, H. and Blackburn, T.M. and Dyer, E.E. and Genovesi, P. and Hulme, P.E. and Jeschke, J.M. and Pagad, S. and Pysek, P. and Winter, M. and Arianoutsou, M. and Bacher, S. and Blasius, B. and Brundu, G. and Capinha, C. and Celesti-Grapow, L. and Dawson, W. and Dullinger, S. and Fuentes, N. and Jaeger, H. and Kartesz, J. and Kenis, M. and Kreft, H. and Kuehn, I. and Lenzner, B. and Liebhold, A. and Mosena, A. and Moser, D. and Nishino, M and Pearman, D. and Pergl, J. and Rabitsch, W. and Rojas-Sandoval, J. and Roques, A. and Rorke, S. and Rossinelli, S. and Roy, H.E. and Scalera, R. and Schindler, S. and Stajerova, K. and Tokarska-Guzik, B. and van Kleunen, M. and Walker, K. and Weigelt, P. and Yamanaka, T. and Essl, F. (2017) 'No saturation in the accumulation of alien species worldwide.', Nature communications., 8 . p. 14435.


Although research on human-mediated exchanges of species has substantially intensified during the last centuries, we know surprisingly little about temporal dynamics of alien species accumulations across regions and taxa. Using a novel database of 45,813 first records of 16,926 established alien species, we show that the annual rate of first records worldwide has increased during the last 200 years, with 37% of all first records reported most recently (1970–2014). Inter-continental and inter-taxonomic variation can be largely attributed to the diaspora of European settlers in the nineteenth century and to the acceleration in trade in the twentieth century. For all taxonomic groups, the increase in numbers of alien species does not show any sign of saturation and most taxa even show increases in the rate of first records over time. This highlights that past efforts to mitigate invasions have not been effective enough to keep up with increasing globalization.

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Record Created:21 Feb 2017 13:29
Last Modified:21 Feb 2017 15:15

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