Benthic transport mechanisms

In the previous section some relevant transport features of the bioturbation process were described for macrofauna that occupy the upper layers of both soils and sediments. Different modes of bioturbation are possible and model formulations should reflect the various sediment reworking mechanisms. Models developed for benthic organisms in sediment are quite advanced and described in a recent literature review (Thoms et ah, 1995). An overview of those sediment mixing models will be presented in the following section. Although comparable and extensive developments do not exist for soil bioturbation, the similarities in the bioturbation transport mechanisms permit the application of sediment models to describe soil bioturbation. 

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