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Table 1.

Mean and maximum temperature determined in the vicinity of each incubator

Temperature (°C)
pH (estimated)
[Sulphide] (μmol l-1; estimated)
IncubatorMeanMaxNMeanMinMeanMax
I1 4±2 23 7.7 7.3 18 115 
I2 6±2 11 32 7.5 7.3 59 145 
I3 13±4 17 30 7.2 7.1 194 263 
Background seawater   7.8   
Temperature (°C)
pH (estimated)
[Sulphide] (μmol l-1; estimated)
IncubatorMeanMaxNMeanMinMeanMax
I1 4±2 23 7.7 7.3 18 115 
I2 6±2 11 32 7.5 7.3 59 145 
I3 13±4 17 30 7.2 7.1 194 263 
Background seawater   7.8   

Temperature (T) values are means ± s.d., recorded by the ROV temperature sensor.

PH and sulphide concentrations were estimated from the temperature and the relationships determined in the study area using: pH=-0.43 ln(T)+8.29(r2=0.8177; N=36); [Sulphide] (μmol 1-1)=19.7T-62.7 (r2=0.9353; N=15).

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