Abstract

FONTURBEL RADA, Francisco. Physicochemical and biological indicators of the eutrophication process at Titikaka Lake ( Bolivia ) . Ecol. apl. [online]. 2005, vol.4, n.1-2, pp.135-141. ISSN 1726-2216.

The degree of the advances in the Titikaka Lake eutrophication process was investigated by macrophytes ( pleuston and limnophytes) assessment, phytoplankton diversity, physicochemical parameters ( pH, turbidity, BOD5, total nitrogen and soluble phosphorus ) and microbiological (thermotolerant fecal coliforms ) parameters at four places of lake. Results showed differential advances in the development of the eutrophication process: one site was classified as minimum water quality, another as low quality water and two as average water quality. Turbidity, BOD5, nitrogen and phosphorus considered jointly are good indicators of the degree of advance of the eutrophication process, whereas macrophyte and phytoplankton assessment provide valuable information on biodiversity loss.

Keywords : eutrophication; localized eutrophication; lakes; indicators; macrophytes; phytoplankton; nutrients; diversity.

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