Figure 1.

Model predictions for the change in surface-connected porosity for initially random structure of porosity 23, 24 and 25%, along with the corresponding curve for the case with no microbial activity. In all cases, the initial surface-connected porosity was 0%. The curve for 22% was indistinguishable from the curve corresponding to no microbial activity. Filled circles with continuous line, no microbes; open squares with continuous line, microbes p = 23%; open triangles with continuous line, microbes p = 24%; open diamonds with continuous line, microbes p = 25%.