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| KARRASCH,BERNHARD; WOELFL,STEFAN; URRUTIA,ROBERTO; GONZÁLEZ,JENNY; VALDOVINOS,CLAUDIO; CID,HERNÁN; PARRA,OSCAR. |
| A strong socio-economic development pressure in South Chile will more and more cause an impact to the present lakes and rivers. Nevertheless, our knowledge concerning the ecological structure and the microbial self-purification capabilities of these lacustrine water bodies is scant but essential for a future sustainable development of land and water use. We studied Lake Laja, a lake already heavily impacted by water diversions for hydropower generation and irrigation. Typical for the Andean region Lake Laja is an oligotrophic water body, limited by nitrogen nutrients. Only very low chlorophyll a and particulate organic carbon (POC) concentrations and a small abundance and biomass of bacteria (mainly ultramicrobacteria) and heterotrophic flagellates were... |
| Tipo: Journal article |
Palavras-chave: Bacterioplankton extracellular enzymes heterotrophic flagellates N-limitation; Phytoplankton. |
| Ano: 2011 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2011000300010 |
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| WOELFL,STEFAN; VILLALOBOS,LORENA; PARRA,ÓSCAR. |
| Lake Riñihue is the last in a chain of glacially derived oligotrophic lakes in southern Chile and was the subject of limnological research by Dr. Hugo Campos and co-workers at the Universidad Austral de Chile, Valdivia, Chile, since the 1970's. Prof. Campos died in the field in 1998, and this paper now presents a review of these data with comments on methodology relevant to trophic parameters of this lake. Data are presented on inorganic nutrients, chlorophyll a, phytoplankton biomass, primary production and Secchi depth obtained over a period of 21 years between 1978 and 1997 in order to evaluate potential changes in these parameters over time. Non-parametric Wilcoxon rank sum tests were applied to determine temporal trends and revealed: (1) total... |
| Tipo: Journal article |
Palavras-chave: Eutrophication; North Patagonian lake; Nutrients; Trophy; Analytical methods. |
| Ano: 2003 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2003000300010 |
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