Which environmental factors trigger the dominance of phytoplankton species across a moisture gradient of shallow lakes?

Izaguirre, Irina; Sánchez, María Laura; Schiaffino, M. Romina; O’Farrell, Inés; Huber, Paula; Ferrer, Nora Cristina; Zunino, Josefina; Lagomarsino, Leonardo; Mancini, Miguel

doi:10.1007/s10750-014-2007-1

Cited by 35 publications

(23 citation statements)

References 42 publications

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“…Abundance dynamics were driven by seasonal temperature fluctuations with, alternately, zooplankton in the warmer seasons and phytoplankton in the colder months. This is in contrast to other shallow lakes in the Pampas (Izaguirre et al, 2015), where phytoplankton blooms occurred mainly in spring and summer. The phytoplankton composition and abundance were similar to those reported for other saline lakes (Borics et al, 2012;Vignatti et al, 2012a).…”

Section: Discussioncontrasting

confidence: 88%

Impact of water input on plankton temporal dynamics from a managed shallow saline lake

Alfonso¹,

Zunino²

2017

Ann. Limnol. - Int. J. Lim.

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La Salada is a shallow saline lake located in the SW of the Pampas subject to significant water management, so the primary objective was to assess whether the water input and physicochemical parameters have an impact on the plankton assemblages over a two year period (2013-dry and 2014-wet). The plankton community structure and physicochemical variables showed substantial changes over the study period. La Salada hosted a plankton community characterized by low diversity and small sized organisms. The nanoplanktonic fraction organisms (2-20 mm) dominate the phytoplankton community. Ochromonas sp. showed the maximum abundance throughout the whole study period. The zooplankton community was dominated by rotifers, with a lack of cladocerans. Halotolerant species, e.g. the rotifer Brachionus plicatilis and the cyclopod Apocyclops sp. were the main species. The seasonal temperature and conductivity dynamics influence the plankton abundance dynamics in La Salada. The increment of nutrients and decrease of conductivity caused by the water input led to an increase in plankton biomass and shaped its composition. These findings emphasize that interactions between plankton, salinity, and nutrients are sensitive to the water input and they improve the understanding of the impact of adequate management decisions.

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Section: Discussioncontrasting

confidence: 88%

Impact of water input on plankton temporal dynamics from a managed shallow saline lake

Alfonso¹,

Zunino²

2017

Ann. Limnol. - Int. J. Lim.

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“…In some hypertrophic shallow lakes, the phytoplankton assemblage is permanently dominated by CPcy, e.g. lake Chascomús (Fermani et al ., ; Iachetti and Llames, , Izaguirre et al ., ). In this particular system, the abundance of Pcy is also high and ranges among the highest values reported for aquatic systems.…”

Section: Introductionmentioning

confidence: 97%

Phenotypic plasticity in freshwater picocyanobacteria

Huber

Diovisalvi

Ferraro

et al. 2017

Environmental Microbiology

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Picocyanobacteria can occur as single-cell (Pcy) or as colonies (CPcy). Published evidence suggests that some Pcy strains have the capability to aggregate under certain culture conditions, however this has not been demonstrated to occur in natural environments. We investigated whether the Pcy and CPcy belong to the same species (i.e. phylotype), and the factors that determine their morphological and genetic variability in a hypertrophic shallow lake dominated by picocyanobacteria. Six main different morphologies and >30 phylotypes were observed. All sequences retrieved belonged to the 'Anathece + Cyanobium' clade (Synechococcales) that are known to have the capability of aggregation/disaggregation. The temporal variation of picocyanobacteria morphotype composition was weakly correlated with the DGGE temporal pattern, and could be explained by the composition of the zooplankton assemblage. Laboratory experiments confirmed that the small cladoceran Bosmina favoured the dominance of CPcy, i.e. Cyanodictyon doubled the size of the colonies when present, most likely through the aggregation of single-cell picocyanobacteria into colonies. Flow cytometry cell sorting and 16S rRNA + ITS sequencing of the Pcy and CPcy cytometrically-defined populations revealed that some phylotypes could be found in both sorted populations, suggesting phenotypic plasticity in which various Synechococcales phylotypes could be found in situ either as single-cells or as colonies.

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“…Los datos cuantitativos reflejan el grado de productividad del cuerpo de agua y permiten analizar su estado trófico y caracterizar al mismo en cuanto a la calidad y aprovechamiento de sus aguas (Garibotti et al 2009) En Argentina, se han llevado a cabo numerosos estudios limnológicos, ecológicos y biogeográficos en lagunas de la región pampeana (e.g. Ringuelet et al 1967a, Quirós 2004, Izaguirre et al, 2015. Sin embargo, el conocimiento actual del zooplancton de las lagunas Pampeanas es escaso o fragmentario.…”

Section: Introductionunclassified

Composition and abundance of the mesozooplancton in Sauce Grande shallow lake (Buenos Aires Province, Argentina)

Baleani

Menéndez

Alfonso

et al. 2017

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El objetivo del estudio fue analizar la composición y abundancia del mesozooplancton en la laguna Sauce Grande (Provincia de Buenos Aires, Argentina) durante el invierno y primavera (Hemisferio Sur) de 2010. Las muestras se colectaron mensualmente en tres estaciones, utilizando una red cónica de 200 μm de poro. El zooplancton estuvo representado por siete taxa. La abundancia varió entre 15,9±0,15 (agosto) y 71,7±31,77 ind/L (noviembre). Los grupos mejor representados fueron Copepoda y Cladocera, siendo Boeckella poopoensis y Moina micrura las especies dominantes respectivamente. Copepoda dominó en los meses más fríos del año mientras que Cladócera, lo hizo sobre fines de primavera. Esto último, podría asociarse a la marcada estacionalidad que experimenta la región.Palabras clave: Mesozooplancton, Laguna Sauce Grande, Argentina. AbstractComposition and abundance of the mesozooplancton in Sauce Grande shallow lake (Buenos Aires Province, Argentina)

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Which environmental factors trigger the dominance of phytoplankton species across a moisture gradient of shallow lakes?

Cited by 35 publications

References 42 publications

Impact of water input on plankton temporal dynamics from a managed shallow saline lake

Impact of water input on plankton temporal dynamics from a managed shallow saline lake

Phenotypic plasticity in freshwater picocyanobacteria

Composition and abundance of the mesozooplancton in Sauce Grande shallow lake (Buenos Aires Province, Argentina)

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