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Recent sulfur enrichment in the sediments of Little Rock Lake. Wisconsin
Author(s) -
Baker Lawrence A.,
Engstrom Daniel R.,
Brezonik Patrick L.
Publication year - 1992
Publication title -
limnology and oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 197
eISSN - 1939-5590
pISSN - 0024-3590
DOI - 10.4319/lo.1992.37.4.0689
Subject(s) - diagenesis , sulfur , seston , sulfate , deposition (geology) , sediment , environmental chemistry , flux (metallurgy) , geology , environmental science , geochemistry , oceanography , chemistry , ecology , nutrient , geomorphology , phytoplankton , biology , organic chemistry
Multiple sediment cores collected from Little Rock Lake, Wisconsin, prior to experimental acidification show that total sulfur accumulation rates increased during the past century, with most of the increase occurring in the nonacid‐volatile inorganic and organic fractions. The increased sulfur accumulation is a result of diagenetic processes within the sediments, rather than changes in seston deposition rates or terrestrial inputs. This enrichment has occurred because atmospheric sulfate deposition rates have increased over the past century, resulting in increased lake‐water sulfate concentrations, which has, in turn, increased the diffusional flux to the sediments and increased the extent of diagenetic immobilization. Individual cores had markedly different sulfur accumulation rates, demonstrating the importance of collecting multiple cores to determine lakewide sediment accumulation.