Editing Doñana National Park (section)

===Impact of infrastructure===
There have been a number of problems related to infrastructure near the park. A project to build an oil pipeline between Extremadura and the port of Huelva has been criticized by environmental groups, who allege it would significantly increase tanker traffic in the area with an associated risk of oil spills. Frequent dredging of the Guadalquivir to allow passage of ships to the port of Seville has been observed to cause serious disturbances in the biodynamics of the estuary. Adena, the ''Associación de defensa de la naturaleza'' (Association for the defence of nature), [[WWF Spain|the Spanish branch of WWF]], has linked the passage of these boats with the introduction of new animals to the local ecosystems, which occurs when they discharge ballast water containing exotic species.

[[File:Huelva ciudad 019.jpg|thumb|The Port of Huelva]]
The Port of Huelva, a few kilometers from the Natural Park, is one of its major environmental threats. Francisco Bella, PSOE senator and former mayor of the town of Almonte Huelva, considers it absurd that the pipeline project has been approved while the national government and the regional government of Andalusia invest in renewable energy. As mayor of Almonte, he noted the difficulties of implementing policies that promote employment near the park: (translation) "...we know almost everything about the ant and the lynx, but need to know how employment evolves in Doñana." In line with Bella's position regarding the aqueduct, Ginés Morata, a biologist and former president of the ''Consejo de Participación de Doñana'' (Participation Council of Doñana), says that the project, which involves the passage of hundreds of oil tankers per year that would unload their cargoes near Doñana, would lead to an increased possibility of oil spills.