Figure 18.

Enhancement of total sediment carbon oxidation due to increased microbial degradation in the presence of irrigated burrows (E₁ = C_iox/C_dox) and reworking (E_r = C_rox/C_dox) as a function of abundance of Nereis diversicolor and Arenicola marina. Other variables are fixed: L = 20 cm, L_b = 20 cm, L_ox = 0.3 cm, r = 0.3 cm, B_ox = 0.2 cm, A₁ = 20 and A₂ = 10. See text for further details (modified from Kristensen and Homier[59]).