<p><span style=color: rgba(201 196 189 1)>Partial differential equations (PDEs) have been used in theoretical ecology research for more than eighty years. Nowadays along with a variety of different mathematical techniques they remain as an efficient widely used modelling framework; as a matter of fact the range of PDE applications has even become broader. This volume presents a collection of case studies where applications range from bacterial systems to population dynamics of human riots.</span></p>