Abstract
Annual decomposition rates of Spartina alterniflora height forms and Juncus roemerianus were determined in situ in three North Carolina salt marshes using the litter bag method. The decomposition of Spartina was significantly influenced by size, i.e., height form, with the taller plants which had greater amounts of stem tissue, being more resistant to decay. Instantaneous decay rates for short and medium Spartina were not significantly different at any site, but they were both significantly greater than that of the tall form at two of the three study sites. Juncus decomposed more slowly than Spartina during the first 8 months, but had decomposed as completely as all three height forms of Spartina at two of the study sites by the end of the 13-month study period. Constant submergence appeared to inhibit decomposition since there was twice as much undecomposed plant material remaining in bags placed in tidal creeks as in those on the marsh surface.
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Paper No. 6581 of the Journal series of the North Carolina Agricultural Experiment Station, Raleigh, North Carolina, September 1980.
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McKee, K.L., Seneca, E.D. The influence of morphology in determining the decomposition of two salt marsh macrophytes. Estuaries 5, 302–309 (1982). https://doi.org/10.2307/1351753
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DOI: https://doi.org/10.2307/1351753