Rivilla R, González C C
Centro de Investigaciones Biológicas, Superior de Investigaciones Científicas, Madrid, Spain.
J Appl Bacteriol. 1989 Aug;67(2):219-23. doi: 10.1111/j.1365-2672.1989.tb03399.x.
Pollution indicators in Doñana National Park show a cyclic seasonal pattern with maximum level in the autumn and minimum in the spring. While faecal streptococci proved to be the best indicator micro-organisms in this type of salty, alkaline environment, total coliforms gave an overestimation of pollution because of the presence of hydroteluric coliforms.