Figure 1

Figure 1: Study sites and environmental conditions. A) Map of the Red Sea representing the mean annual chlorophyll a (chl a) concentrations from April 2011 to March 2012 and the study sites. Regions (underlined), non-polluted sites (connected with a black line) and sites close to a source of pollution (connected with a dotted line). Distance to shore is given in brackets. Chl a data derived from satellite images of NASA, Giovanni online data system, Ocean Color Radiometry, data set: MODIS-Aqua 4km. Maqna (MAQ^1N), Al-Wajh non- and polluted (WAJ^2N and WAJ^2P), Yanbu non- and polluted (YAN^3N and YAN^3P), Mastura (MAS^4N), Rabigh (RAB^4P), Jeddah non- and polluted (JED^5N and JED^5P), Al-Lith (LIT^6P), Doga (DOG^6N), Farasan North and South (FAR-N^7N and FAR-S^7N). B) Measured values of chl a, particulate C, total N and total P from N to S. C) Measured temperature trends in 3 m depth at the non-polluted sites from February 2011 until March 2012.