Figure 27 . Venn diagram showing the number of total (left) and alien (right) species detected by different genetic markers (colour) analysed for different sampling methods (vertical panes). Data was limited to only those species belonging to phyla investigated using conventional methods (Annelida, Arthropoda, Bryozoa, Chaetognatha, Chlorophyta, Chordata, Cnidaria, Ctenophora, Echinodermata, Foraminifera, Mollusca, Nematoda, Nemertea, Ochrophyta, Porifera, Priapulida, Rhodophyta, and Streptophyta).
