Fig. 3From: What are the toxicity thresholds of chemical pollutants for tropical reef-building corals? A systematic reviewDistribution of studies (total 1348) by country of origin of corals (ISO 3166 country or territory names). Where corals came from more than one country, these countries are separated by a vertical bar. The different colours represent the country regions following [57] where the three Caribbean regions and the two Indian Ocean regions were grouped togetherBack to article page