2015-07-152015-07-15https://bibliotecadigital.ciren.cl/handle/20.500.13082/22351enEcologíaEcosistema acuáticoImpacto ambientalBiósfera "Ecología"Programme on man and the biosphere. (mab) international working group in project 5: ecological effects of human activities on the value and resources of lakes, marshes, rivers, deltas, estuaries and coastal zones.Programa3445