Nutrient concentrations and trophic state of small patagonian andean lakes

We analyzed nutrient, chlorophyll, and ionic concentrations in 17 lakes along a strip of land located in the rainy Andes Mountains and the ecotone with the dry Patagonian steppe, from 36 to 44° S latitude. Most of the sampled lakes had the ionic composition of Andean lakes and showed ultraoligotroph...

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Autores principales: Baigún, Claudio Rafael Mariano, Mugni, Hernán Diego, Bonetto, Carlos Alberto
Formato: Articulo
Lenguaje:Inglés
Publicado: 2006
Materias:
Ciencias Naturales
Andes
Patagonia
Lagos
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/83610
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-83610
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Naturales
Andes
Patagonia
Lagos
spellingShingle Ciencias Naturales
Andes
Patagonia
Lagos
Baigún, Claudio Rafael Mariano
Mugni, Hernán Diego
Bonetto, Carlos Alberto
Nutrient concentrations and trophic state of small patagonian andean lakes
topic_facet Ciencias Naturales
Andes
Patagonia
Lagos
description We analyzed nutrient, chlorophyll, and ionic concentrations in 17 lakes along a strip of land located in the rainy Andes Mountains and the ecotone with the dry Patagonian steppe, from 36 to 44° S latitude. Most of the sampled lakes had the ionic composition of Andean lakes and showed ultraoligotrophic conditions, while a few with the ionic composition of Patagonian Plateau lakes showed higher nutrient concentrations. Chlorophyll was correlated to P and N concentrations, but chlorophyll/TP ratio was lower than reported in previous worldwide surveys. A lithology dominated by igneous rock together with the remoteness and pristine character of the basins contribute to the oligotrophic status of the lakes. Two other factors appear to be important in maintaining the oligotrophic condition. Andisols, allophanic soils developed over volcanic ash deposits in the rainy areas, have large P retention capability and therefore decrease the load of P to the lakes. Natural dense Nothofagus spp. forests, with a geographical distribution coincident with that of the andisols, are efficient mechanisms for nitrogen retention through nitrogen resorption from senescent leaves.
format Articulo
Articulo
author Baigún, Claudio Rafael Mariano
Mugni, Hernán Diego
Bonetto, Carlos Alberto
author_facet Baigún, Claudio Rafael Mariano
Mugni, Hernán Diego
Bonetto, Carlos Alberto
author_sort Baigún, Claudio Rafael Mariano
title Nutrient concentrations and trophic state of small patagonian andean lakes
title_short Nutrient concentrations and trophic state of small patagonian andean lakes
title_full Nutrient concentrations and trophic state of small patagonian andean lakes
title_fullStr Nutrient concentrations and trophic state of small patagonian andean lakes
title_full_unstemmed Nutrient concentrations and trophic state of small patagonian andean lakes
title_sort nutrient concentrations and trophic state of small patagonian andean lakes
publishDate 2006
url http://sedici.unlp.edu.ar/handle/10915/83610
work_keys_str_mv AT baigunclaudiorafaelmariano nutrientconcentrationsandtrophicstateofsmallpatagonianandeanlakes
AT mugnihernandiego nutrientconcentrationsandtrophicstateofsmallpatagonianandeanlakes
AT bonettocarlosalberto nutrientconcentrationsandtrophicstateofsmallpatagonianandeanlakes
bdutipo_str Repositorios
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