Artículo
Microbial planktonic communities in lakes from a Patagonian basaltic plateau: Influence of the water level decrease
Porcel, Elisa María Sol
; Saad, Juan Francisco
; Sabio y García, Carmen Alejandra
; Izaguirre, Irina
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Fecha de publicación:
07/2019
Editorial:
Birkhauser Verlag Ag
Revista:
Aquatic Sciences
ISSN:
1015-1621
e-ISSN:
1420-9055
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
In this study we analyzed the structure of the microbial planktonic communities in 16 lakes located in one of the Patagonian plateaus. In these environments picoplankton constitute a key component of the food webs. We compared lakes with different regimes (clear vegetated and turbid), in periods with contrasting hydrological conditions. Samplings were conducted during late summer in 2015 (higher water levels), 2016 and 2017 (lower water levels). In each lake we measured limnological variables and quantified picoplankton by flow cytometry. Differences in picoplankton structure among lakes were associated with their regime and hydrological conditions. We found higher abundances of heterotrophic bacterioplankton (HB) in more turbid and eutrophic lakes; these lakes also showed higher abundances of both bacterial fractions analyzed (high and low nucleic-acid content). Clear vegetated oligotrophic lakes showed the lowest photosynthetic picoplankton abundances and higher densities of PE-rich picocyanobacteria (Pcy). All lakes presented PE-rich cells and picoeukaryotes (Peuk), the latter being the most frequent group in all the environments and the most abundant in turbid ones. PC-rich Pcy appeared only in clear vegetated, organic turbid and inorganic turbid, showing one or two cytometric populations. Clear vegetated lakes with water level reduction show an increase of HB, PC-rich cells and Peuk abundances. We provided evidences that picoplankton structure is influenced by lake regime, and in some lakes the shift from clear vegetated to turbid states strongly affects the structure of these communities.
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Identificadores
Colecciones
Articulos(CCT - PATAGONIA CONFLUENCIA)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - PATAGONIA CONFLUENCIA
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - PATAGONIA CONFLUENCIA
Articulos(IEGEBA)
Articulos de INSTITUTO DE ECOLOGIA, GENETICA Y EVOLUCION DE BS. AS
Articulos de INSTITUTO DE ECOLOGIA, GENETICA Y EVOLUCION DE BS. AS
Citación
Porcel, Elisa María Sol; Saad, Juan Francisco; Sabio y García, Carmen Alejandra; Izaguirre, Irina; Microbial planktonic communities in lakes from a Patagonian basaltic plateau: Influence of the water level decrease; Birkhauser Verlag Ag; Aquatic Sciences; 81; 3; 7-2019; 1-13
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