Global port survey quantifies commercial shippings effect on biodiversity
Andres, J. A.; Czechowski, P.; Grey, E.; Saebi, M.; Andres, K.; Brown, C.; Chawla, N.; Corbett, J. J.; Brys, R.; Cassey, P.; Correa, N.; Deveney, M. R.; Egan, S. P.; Fisher, J. P.; vanden Hooff, R.; Knapp, C. R.; Leong, S. C. Y.; Neilson, B. J.; Paolucci, E. M.; Pfrender, M. E.; Pochard, M. R.; Prowse, T. A.; Rumrill, S. S.; Scianni, C.; Sylvester, F.; Tamburri, M. N.; Therriault, T. W.; Yeo, D. C.; Lodge, D.
Show abstract
Spread of nonindigenous organisms by shipping is one of the largest threats to coastal ecosystems. Limited monitoring and understanding of this phenomenon currently hinder development of effective prevention policies. Surveying ports in North America, South America, Europe, Southeast Asia, and Australia we explored environmental DNA community profiles evident of ship-born species spread. We found that community similarities between ports increased with the number of ship voyages, particularly if the ports had similar environments, and when indirect stepping-stone connections were considered. We also found 57 known non-indigenous taxa, some in hitherto unreported locations. We demonstrate the usefulness of eDNA-based tools for global biodiversity surveys, and highlight that shipping homogenizes biodiversity in predictable that could inform policy and management.
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