Figure 1

Mapamundi showing the study regions, represented with a star, and the native range centers of the most abundant NIS found therein, represented by circles of diameter proportional to the total frequency of NIS. Species acronyms are placed inside the circles. Cryptogenic NIS acronyms are placed in a box due to unknown origin. AIPP, AMAV, AMPA AMPE, BOTV, BUGN, CALS, CRAG, FICE, LIVR, MICS, MYTT, MYTM, STYP, WATS and XENS are respectively Aiptasia pulchella, Amathia verticillata, Amphibalanus amphitrites, A. eburneus, Bothrylloides violaceus, Bugula neritina, Callyspongia siphonella, Magallana gigas, Ficopomatus enigmaticus, Livoneca redmanii, Microcosmus squamiger, Mytilus trossulus, Mytilaster minimus Styela plicata, Watersipora subatra and Xenostrobus securis. Figure created by L. Miralles with Adobe Photoshop CS6 for Mac.