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Table 1.

Comparison of the oxygen sulfide and proton flux rates of Riftia pachyptila, Lamellibrachia cf luymesi and Urechis caupo

Oxygen uptake rate (μmol g-1 h-1)Proton elimination rate (μequiv g-1 h-1)
SpeciesPre-sulfide exposurePost-sulfide exposureSulfide uptake rate (μmol g-1 h-1)Pre-sulfide exposurePost-sulfide exposure
Riftia pachyptila 4.81±0.42 (8) 13.63±0.44 (28) 6.96±0.13 (28) 2.18±0.44 (14) 40.49±0.42 (28) 
Lamellibrachia cf luymesi 1.4±0.59 (15) 6.1±2.3 (14) 2.6±0.2 (14) 0.79±0.83 (4) 11.90±0.94 (14) 
Urechis caupo 3.12±0.19 (12) 4.55±0.61 (12) ND 0* 2.17±1.06 (5) 
Oxygen uptake rate (μmol g-1 h-1)Proton elimination rate (μequiv g-1 h-1)
SpeciesPre-sulfide exposurePost-sulfide exposureSulfide uptake rate (μmol g-1 h-1)Pre-sulfide exposurePost-sulfide exposure
Riftia pachyptila 4.81±0.42 (8) 13.63±0.44 (28) 6.96±0.13 (28) 2.18±0.44 (14) 40.49±0.42 (28) 
Lamellibrachia cf luymesi 1.4±0.59 (15) 6.1±2.3 (14) 2.6±0.2 (14) 0.79±0.83 (4) 11.90±0.94 (14) 
Urechis caupo 3.12±0.19 (12) 4.55±0.61 (12) ND 0* 2.17±1.06 (5) 

R. pachyptila and L. cf luymesi worms were maintained under in situ conditions (see Materials and methods), but in the absence of sulfide, for at least 12h. Sulfide was then added to the seawater (R. pachyptila, 263 μmoll-1ΣH2S; L. cf luymesi, 500μmoll-1 ΣH2S; U. caupo, 100μmoll-1 ΣH2S).

Rates are expressed in terms of wet mass.

Values are means ± 1 S.D. (N). N is the number of samples (measurements) used in determining mean values.

ND, not determined.

ΣH2S, total sulfide concentration.

*

Below the limits of detection.

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