Stable sulfur isotope ratios as a tool for interpreting ecosystem sulfur dynamics

✍ Scribed by R. D. Fuller; M. J. Mitchell; H. R. Krouse; B. J. Wyskowski; C. T. Driscoll

• Book ID: 104654554
• Publisher: Springer Netherlands
• Year: 1986
• Tongue: English
• Weight: 480 KB
• Volume: 28
• Category: Article
• ISSN: 0049-6979
• DOI: 10.1007/bf00184078

✦ Synopsis

Stable S isotope ratios (b34S) were evaluated in soil solution leachates, soluble plus adsorbed soil SO42-, soil organic S, precipitation, and in stream solutions along an elevational gradient at the Hubbard Brook Experimental Forest in the White Mts. of New Hampshire, U.S.A. The b34S of soil organic S varied with soil horizon and vegetation type, but was generally more negative than adsorbed or soil solution SO42-. In the Bh horizon, b34S of organic S was typically more negative than the Oa horizon or lower mineral soil (Bsl). The patterns suggest a combination of plant and microbial fractionation processes. Stream b34S values decreased with decreasing elevation and were correlated with decreases in SO42-concentration, suggesting an additional S source in higher elevation coniferous sites with a unique 6345.