b.) reference c.) enriched d.) reference Figure 3-1. Radar Plots of benthic (a & b) and soil (c & d) layer average normalized enzyme activities for the enriched and reference habitats showing the basis for MARCIE model components. MARCIE Model Components Ecell/Ep values reflect the apparent P control on C mineralization based on resource allocation (Table 3-6). Higher Ecell/Ep values indicate decreased production of PHO in relation to the hydrolytic enzymes involved in C mineralization. Therefore, higher Ecell/Ep values suggest decreased control of P on C mineralization. Benthic and soil Ecell/Ep were significantly higher at all the enriched habitats. The enriched benthic layer did not show any significant differences among the habitats. However, all of the habitats exhibited significantly different benthic Ecell/Ep values at the reference sites a.) enriched