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Artículo

Controlling factors in planktonic communities over a salinity gradient in high-altitude lakes

Frau, DiegoIcon ; Battauz, Yamila SoledadIcon ; Mayora, Gisela PaolaIcon ; Marconi, Patricia LauraIcon
Fecha de publicación: 07/2015
Editorial: EDP Sciences
Revista: Annales de Limnologie-International Journal of Limnology
ISSN: 0003-4088
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Otras Ciencias Biológicas

Resumen

This study aimed to determine the factors affecting plankton structure along a salinity gradient during the summer in high-altitude endorheic lakes in Catamarca Province (Argentina). During the summer 2013, eight lakes located between 3000 and 4300 meters above sea level were sampled in a 6-day period being analysed plankton, limnological variables and flamingo abundance. Principal Component Analysis explained 80% of the system variability, permitting lakes to be ordered by salinity: subhaline (SH), hypohaline (HH) and mesohaline (MH). A total of 101 phytoplankton taxa were registered, having Bacillariophyceae the highest richness (43 species registered). HH lakes were dominated by Bacillariophyceae (between 65 and 100%), while Chlorophyceae and Euglenophyceae were more abundant in SH and MH lakes. Zooplankton was poorly represented in richness (only 21 species were registered). MH lakes were dominated by Copepoda (>85% of total abundance) and HH lakes by Rotifera (>51% of total abundance). It was not found a clear pattern in SH lakes. The redundancy analysis explained 70.7% of phytoplankton variability and 75.7% of zooplankton variability. Bacillariophyceae presence was associated with availability of dissolved silica (Si), while Euglenophyceae and Chlorophyceae were associated with a higher nitrogen:phosphorus ratio. Cladocera and Copepoda abundance were linked to Euglenophyceae abundance and the area of lakes while Rotifera displayed a positive relation with the concentration of dissolved organic matter. We conclude that both phytoplankton and zooplankton abundance are mainly controlled by Bottom-Up forces including dissolved Si for Bacillariophyceae, and availability of Euglenophyceae for zooplankton while salinity and altitude have an effect on plankton richness distribution.
Palabras clave: Bottom-Up , High-Altitude Salt Lakes , Phytoplankton , Top-Down , Zooplankton
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution 2.5 Unported (CC BY 2.5)
Identificadores
URI: http://hdl.handle.net/11336/50580
DOI: https://dx.doi.org/10.1051/limn/2015020
URL: https://www.limnology-journal.org/articles/limn/abs/2015/03/limn140066/limn14006
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Articulos(INALI) [463]
Articulos de INST.NAC.DE LIMNOLOGIA (I)
Citación
Frau, Diego; Battauz, Yamila Soledad; Mayora, Gisela Paola; Marconi, Patricia Laura; Controlling factors in planktonic communities over a salinity gradient in high-altitude lakes; EDP Sciences; Annales de Limnologie-International Journal of Limnology; 51; 3; 7-2015; 261-272
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