Inorganic and organic sulfur profiles in nine Sphagnum peat bogs in the United States and Czechoslovakia.
Depth profiles of total S, organic S, soluble SO 4 2- -S, FeS, and FeS2 were characterized for Sphagnum-derived peat cores collected from 9 sites. Marcell S-2 Bog (MN), Tamarack Swamp (PA), Cranesville Swamp (MD/WV), and Big Run Bog (WV) receive water from precipitation and upland runoff; atmospheric S deposition is 13, 47, 54, and 114 mmol m-2, yr-1, respectively. McDonald's Branch Swamp (NJ) is predominantly groundwater fed. Tub Run Bog (WV) and Allegheny Mining Bog (MD) receive augmented SO 4 2- inputs through acid coal mine drainage. Jezerní slat' and Boí Dar Bog in Czechoslovakia receive atmospheric S inputs of 33 and 243 mmol m-2 yr-1, respectively. In the peat from all sites except Allegheny Mining Bog, where the substantially augmented SO 4 2- input was reflected in an unusually high dissolved SO 4 2- pool in the surface peat, organic S (probably mostly carbon bonded S) was the dominant S fraction; FeS2 was generally the dominant inorganic S fraction. Subsurface peaks in total S, organic S and FeS2-S in peat from the runoff water fed sites were interpreted as indicative of depth-dependent patterns in S reduction/oxidation and in S immobilization/mineralization. Unless SO 4 2- inputs to a site are tremendously augmented (e.g., Allegheny Mining Bog), the rapid turnover of the dissolved SO 4 2- pool combined with the relative stability of the other inorganic and organic S pools, apparently functions as an effective buffer against site differences in S inputs, leading to a general similarity in vertical S profiles in the peat deposits.
|Main Author:||Novak, Martin.|
|Other Authors:||Wieder, R Kelman.|