Natural resources in wetlands are always been exploited for human activities. The Albufera of Valencia is a freshwater lagoon and estuary on the Valencian coast in eastern Spain. This lagoon is an anthropic system due to the fact that his natural regime has been affected by the consequences of the urban and industrial development. Rice fields surrounding the Albufera lagoon form a system of wetlands which provide habitat for the survival of aquatic vegetation and macroinvertebrates, which constitute the main food source for fish and birds. This research, conducted with the help of a research group of the Polytechnic University of Valencia leaded by Prof.