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Science 1 October 1982:
Vol. 218. no. 4567, pp. 61 - 63
DOI: 10.1126/science.218.4567.61
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Articles

Relation of Soil Water Movement and Sulfide Concentration to Spartina alterniflora Production in a Georgia Salt Marsh

GARY M. KING 1, M. J. KLUG 1, R. G. WIEGERT 2, and A. G. CHALMERS 3

1 Department of Microbiology and Public Health, Michigan State University, East Lansing 48824, and Kellogg Biological Station, Hickory Corners, Michigan 49060
2 Department of Zoology, University of Georgia, Athens 30602
3 University of Georgia Marine Institute, Sapelo Island 31367

It is proposed that differences in plant height and productivity of the salt-marsh cordgrass Spartina alterniflora are the result of a dynamic interaction among tidal water movement, dissolved iron and sulfide concentrations in marsh soils, and bacterial sulfate reduction. Tidal water movement regulates the input of iron into marsh soils and the drainage of sulfide-containing interstitial water, and thereby controls the concentration of dissolved sulfide formed as a result of bacterial sulfate reduction. Near tidal creeks, where water movement and plant height and production are greatest, sulfide concentrations are lowest; in more elevated regions of marsh, where water movement andplant production are least, sulfide concentrations are highest. Plant height and productivity may be limited by the effects of sulfide on nutrient uptake.

Submitted on March 22, 1982
Revised on May 18, 1982


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Water Uptake by Roots Controls Water Table Movement and Sediment Oxidation in Short Spartina Marsh.
J. W. H. Dacey, J. W.H. DACEY, and B. L. HOWES (1984)
Science 224, 487-489
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