however, can vary, as newer and more complex models can be used to fit tracer profiles. Unlike the standard biodiffusion model, these more complex models, such as expanded versions of the biodiffusion model, random walk, and particle-tracking models, can provide more accuracy, incorporate different modes of sediment transport, and account for more spatial heterogeneity. See also Argillipedoturbation Bioirrigation Zoophycos References External links Nereis Park (the World of Bioturbation) Worm Cam Biological oceanography Aquatic ecology Limnology Pedology Physical oceanography Sedimentology