File:No saturation in the accumulation of alien species worldwide ncomms14435 f1.jpg

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English: Number of first records of established alien species per region (mainlands and islands) for major taxonomic groups.

(a–f) Colour and size of circles indicate the number of first records of established alien species. Circles denote first records on small islands and archipelagos otherwise not visible.

The world maps were created using the ‘maptools’ package(Bivand, R. & Lewin-Koh, N. maptools: Tools for Reading and Handling Spatial Objects 0.8-39 R Foundation for Statistical Computing, Vienna (2016).)4 of the open source software R (R Development Core Team. R: A Language and Environment for Statistical Computing Available at https://www.r-project.org/R Foundation for Statistical Computing, Vienna (2015).
Français : Nombre de premiers enregistrements d'espèces exotiques par région (continent et îles) pour les principaux groupes taxonomiques.

(A-f) La couleur et la taille des cercles indiquent le nombre de premiers enregistrements d'espèces exotiques établies. Les cercles indiquent les premiers enregistrements sur de petites îles et archipels autrement non visibles.

Les cartes du monde ont été créées à l'aide du package 'maptools' Logiciel libre disponible sur https://www.r-project.org/R Fondation pour l'informatique statistique, Vienne (2015).
Date
Source http://www.nature.com/articles/ncomms14435#ref40 No saturation in the accumulation of alien species worldwide , in Nature Communications 8, Article number: 14435 (2017) doi:10.1038/ncomms14435, Published online ; 15 February 2017 ("This work is licensed under a Creative Commons Attribution 4.0 International License")
Author Hanno Seebens & al.

Source : http://www.nature.com/articles/ncomms14435/figures/1 CC-BY-SA 4.0.

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