Transport of particulate organic material between salt marsh and estuary
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The macrophyte production and the transport of particulate organic matter between march and adjacent estuary have been investigated for a 30 ha salt marsh along the Oosterschelde estuary, The Netherlands.
The primary production of macrophytes, measured with Smalley's method, was 837–1030 g dry organic matter.m−2.year−1. Measurements of amounts of particulate organic matter transported through one of the main tidal creeks in the salt march resulted in a net import. On average 31% of the material brought in by the flood settled in the marsh. The majority of this material is smaller than 63 μm. On the other hand large floating material is exported during storm tides, although the quantity seems to be smaller than that of the suspended material imported.
The differences between various marshes with regard to export and import of organic matter are explained in terms of marsh level, primary production, turbulent diffusion, sinking and resuspension of particulate matter and biotic transformations.
KeywordsOrganic Matter Organic Material Salt Marsh Particulate Organic Matter Turbulent Diffusion
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