
TY  - JOUR
A1  - Bauld, J 
A1  - Chambers, LA 
A1  - Skyring, GW 
T1  - Primary Productivity, Sulfate Reduction and Sulfer Isotope Fractionation in Algal Mats and Sediments of Hamelin pool, Shark Bay, W. A.
JF  - Marine and Freshwater Research
JO  - Mar. Freshwater Res.
Y1  - 1979
VL  - 30
IS  - 6
SP  - 753
EP  - 764
KW  - 
UR  - https://doi.org/10.1071/MF9790753 
N2  - A variety of benthic algal mats grow in the intertidal and subtidal environments of Hamelin Pool. Primary productivity ranged from 17 mhCm-2 h-1 for smooth mat, present in the high intertidal zone, to 113 mgC m-2 h-1 for colloform mat, found only in subtidal areas. Although pustular mat showed high photosynthetic efficiency [9.1 mgC (mg Chla)-1h-1] sulfate reduction was undetectable in underlying sediments. The rates of sulfate reduction in sediments close to intertidal stromatolites and in sediments beneath smooth mat were similar (5 mmol m-2d-1). In the intertidal zone stromatolitic debris has formed sediments in which sulfate reduction is rapid (14-46 mmol m-2d-1). Sulfur isotope distribution indicates a semiclosed system in the latter sediments (&#948;34S&#8240;,: SO42-, +22.0 to +27.7; S2-, - 11.2 to -14.5) and an open system in the smooth mat sediments (&#948;34S&#8240;: SO42-,+20.7; S2-, -23.2). Fractionation factors are between 1.033 and 1.044. The geobiological significance of these data is discussed. 
ER  -

