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	Provedor de dados RChHN (2) Autor SOTO,DORIS (1) Palavra-chave Mixing depth (2) Attenuation coefficient (1) El Niño event 1997-1998 (1) Euphotic zone (1) Nitrogen (1) Oligotrophy (1) Photosynthetic parameters (1) Primary production (1) Temperate lakes (1) Mais... Tipo do documento Journal article (2) Ano 2002 (2) País Chile (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Oligotrophic patterns in southern Chilean lakes: the relevance of nutrients and mixing depth RChHN SOTO,DORIS. Southern Chilean monomictic, temperate lakes are generally oligotrophic with high water transparency, low productivity and some apparent resistance to disturbances such as phosphorus additions. This paper attempts to explain low chlorophyll-a values using descriptive and experimental approaches. Three different scales are used, (a) a micro scale both in space and time, with experimental manipulations of N, P and total light in 24 enclosures in lake Llanquihue, (b) a longer time scale analysing 18 months of data in several sites within lake Llanquihue grouped as salmon farming sites, town bays and control sites, and (c) a broader time scale (9 years) by monitoring lakes Puyehue, Rupanco and Llanquihue, all in the Araucanian lake region and Yelcho lake in... Tipo: Journal article Palavras-chave: Oligotrophy; Mixing depth; Nitrogen; Temperate lakes. Ano: 2002 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2002000200009 Mesoscale primary production and bio-optical variability off Antofagasta (23-24º S) during the transition to El Niño 1997-1998 RChHN The spatial variability of primary production (PP), chlorophyll-a (Chl-a) and the photosynthetic parameters were studied off Antofagasta, Chile (23-24ºS, 70-72º W) during austral summer and winter. Between cruises (January and July 1997), significant changes occurred in the water column, including higher temperatures in the euphotic zone (Zeu) deepening of thermocline below Zeu, an increase of oxygen concentration and the intrusion of Subtropical Waters with potential limitation of nutrients. These strong physical anomalies due to the transition period of El Niño 1997-1998 appeared in this study area during March 1997. During the July cruise, the El Niño event 1997-1998 was in the middle of its development (IOS-2). The hypothesis that chlorophyll-a... Tipo: Journal article Palavras-chave: Primary production; Photosynthetic parameters; Attenuation coefficient; Euphotic zone; Mixing depth; El Niño event 1997-1998. Ano: 2002 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2002000100019 Registros recuperados: 2 Primeira ... 1 ... Última

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