Modeling Approach for Gradient-Based Motion of Microorganisms in Porous Media and Applications in Biosystems

One of the adaptive behavioral responses of living organisms in their environment is thermotaxis, by which they migrate toward a preferred temperature or away from the uncomfortable heat sources. Thermotaxis or motion in the œeld of temperature gradient is a very common phenomenon and can be found in many events in nature, from biological ones such as the motion of Dictyostelium slugs (Maree et al. 1999), self-organized thermoregulation of honeybees (Watmough and Camazine 1995), Caenorhabditis elegans behaviors (Matsuoka et al. 2008), human and animal sperm (Bahat and Eisenbach 2006, Bahat et al. 2012) to the migration of colloidal particles (Golestanian 2012).