Tolerance of benthic foraminifera (Protista:Sarcodina) to hydrogen sulphide

L Moodley, BEM Schaub, GJ van der Zwaan, PMJ Herman
1998 Marine Ecology Progress Series  
Benthic foraminlfera are dominant members of the meiofauna, commonly occurring below the anoxic-oxic interface in marine sediments. The absence of oxygen in marine coastal sediments is often correlated with the formation of hydrogen sulphide. In this study the tolerance of benthic foraminifera (from the northwestern Adriatic Sea) to hydrogen sulphide was examined experimentally. Although the foraminiferal assemblage exhib~ted a high tolerance to short-term exposure (21 d ) , prolonged exposure
more » ... o sulph~dic conditions (66 d with a final concentration of 12 PM dissolved hydrogen sulphide) resulted in a significant reduction of total foraminiferal densities with time. Reproduction was evident under oxic conditio~s but none of the gencra prc!iferated under sillphidic conditions. This implies that tolerance of sulphidic conditions was restricted to survival and that sulphlde may be a prominent distnbutional factor for benthic foraminifera.
doi:10.3354/meps169077 fatcat:5tvafskl25en5pipczcasoc6re