Convention of Ramsar 

Introduction 
Convention of Ramsar, international agreement on humedales, guided to guarantee the conservation and the rational use of these ecosystems. This treaty was approved February 2 1971 in the Iranian city of Ramsar and she/he went into effect later four years. 
The humedales is areas of swamps, swamps, peat-bogs or other surfaces covered with water, natural or artificial, permanent or temporary, stagnated or currents, sweet or salted, included the extensions of marine water whose depth with tide lowers don't exceed of six meters". In general, the humedales shows a great diversity in function of its origin, geographical localization, aquatic and chemical régime, dominant and characteristic vegetation of the floor or silts. 
Although the humedales represents less than 6% of the surface of the planet, they constitute some very productive ecosystems and they play a decisive part in the regulation of the resources hídricos. They provide an indispensable hábitat for great number of amphibians, reptiles, fish, birds, mammals and spineless, and for countless vegetable species. 

Organization 
The main organs responsible for the application of the Convention are the contracting parties or States signatories (133 at the end of 2002), the Permanent Committee and the Secretary of the Convention (the Office of Ramsar). The Conference of the contracting parties (COP), in which all the States members of the Convention participate, she/he meets every three years and she/he takes charge of elaborating the politicians of the Convention. The Permanent Committee meets annually and it applies the decisions approved in the Conference. The Secretary that is located in the headquarters of the World Union for the Nature (UICN), she/he takes charge of the permanent coordination of the Convention. A Group of Scientific Exam and Technician (GECT) ready advice to the mentioned organs. 
In the first Conference of the contracting parties, taken place in Cagliari (Italy) in 1980, the approaches were adopted for the identification of humedales of international importance. In the fifth conference that took place in the city of Kushiro (Japan) in 1993, she/he settled down the Group of Scientific Exam and Technician. The eighth Conference of the contracting parties (COP8) she/he took place in Valencia (Spain), in November of 2002, under the motto Humedales: it dilutes, life and culture". During this encounter, Samoa and Palau they united officially to the Convention, and she/he remembered the objective to conserve 250 million hectares of humedales for 2010. 

DE HUMEDALES OF INTERNATIONAL IMPORTANCE LISTS 
Also well-known as List of Ramsar, the List of Humedales of International Importance counted, at the end of the year 2002, 1.224 humid areas of all the regions of the world, selected by its importance in ecological, botanical, zoological terms, limnológicos or hydrological. 
To settle down what humedales they should be considered of international importance, the Convention has elaborated a series of approaches; for example that are representative, strange or only humedales; that they contain threatened species; or that they sustain a population of 20.000 or more aquatic birds. 
The countries that adhere to the Convention of Ramsar should designate at least a candidate pierces to be included in the List. Spain ratified the Agreement of Ramsar August of 1982, 20 inscribing the national Park of Doñana and the national Park of the Charts of Daimiel like Sitios Ramsar. Other humedales included in the List is the lake Nakuru in Kenya, the pantanal of I Kill Grosso in Brazil, the Park national Green Stick in Costa Rica, the area of Protection of Flora and Fauna Cuatrociénegas in Mexico or the Park national Lagoon of the Restinga in Venezuela.