Use of 35S to determine the influence of Hexagenia on sulfur cycling in lake sediments
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Radioactive sulfate (35SO4) was added to the overlying water of lake sediment microcosms to determine the effect of the burrowing mayfly nymph, Hexagenia, on sulfur transformations and fluxes. Hexagenia increased the rate of 35SO4 incorporation into the sediment and the rate at which 35SO4 was biologically assimilated. In addition, 35SO4 approached a steady-state condition with non-radioactive sulfur pools more rapidly in microcosms containing Hexagenia than in reference microcosms. Results indicate that Hexagenia enhance rates of sulfur cycling which may alter sediment acid-base chemistry and redox potential.
KeywordsHexagenia Sulfur Bioturbation Sediment
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- Aller, R. C. & J. Y. Yingst, 1978. Biogeochemistry of tubedwellings: a study of the sedentary polychaete Amphritrite ornata. J. mar. Res. 36: 201–254.Google Scholar
- Chatarpaul, L., J. B. Robinson & N. K. Kaushik, 1980. Effects of tubificid worms on denitrification and nitrification in stream sediment. Can. J. Fish. aquat. Sci. 37: 656–663.Google Scholar
- Davis, R. B., 1974. Tubificids alter profiles of redox potential and pH in profundal lake sediment. Limnol. Oceanogr. 19: 342–346.Google Scholar
- Edmunds, G. F., S. L. Jensen & L. Berner, 1976. The mayflies of North and Central America. University of Minnesota Press, Minneapolis, 330 pp.Google Scholar
- Gallep, G. W., 1979. Chironomid influence on phosphorus release in sediment-water microcosms. Ecology 60: 547–556.Google Scholar
- Hunt, B. P., 1953. The life history and economic importance of a burrowing mayfly, Hexagenia limbata, in southern Michigan lakes. Bull. Inst. Fish. Res. No. 4, Mich. Dept. of Cons., 151 pp.Google Scholar
- Landers, D. H., M. J. Mitchell & M. B. David, 1983. Analysis of organic and inorganic sulfur constituents in sediments, soils and water. Int. J. envir. Anal. Chem. 14: 245–256.Google Scholar
- Lawrence, G. B., M. J. Mitchell & D. H. Landers, 1982. Effects of the burrowing mayfly, Hexagenia, on nitrogen and sulfur fractions in lake sediment microcosms. Hydrobiologia 87: 273–283.Google Scholar
- Uutala, A., 1982. Composition and production of the zoobenthos community in three New York lakes, with emphasis on Chironomidae (Diptera). M. Sci. Thesis, St. Univ., N.Y. Coll. envir. Sci. For. 131 pp.Google Scholar