Paula Huber

Paula Huber
Instituto Nacional de Limnología (INALI) · Plankton laboratory

PhD on molecular biology and biotechnology

About

23
Publications
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196
Citations

Publications

Publications (23)
Article
El bacterioplancton es un componente esencial en el funcionamiento de los ecosistemas acuáticos y tiene un profundo impacto en la calidad del agua de los sistemas. Por lo tanto, es importante ampliar el conocimiento sobre su dinámica y diversidad genética. Los objetivos del presente estudio fueron evaluar la estructura y la dinámica del bacteriopla...
Article
Modern agricultural practices heavily rely on the use of agrochemicals. Glyphosate based herbicides are among the most widespread agricultural supplies. The massive application of glyphosate in conventional farming, provides continuous inputs of the herbicide into the environment, unintentionally placing non-target organisms at risk. Shallow lakes...
Article
Protists play a fundamental role in all ecosystems, but we are still far from estimating the total diversity of many lineages, in particular in highly diverse environments, such as freshwater. Here, we survey the protist diversity of the Paraná River using metabarcoding, and we applied an approach that includes sequence similarity and phylogeny to...
Article
The ecological status of Pampean shallow lakes is evidenced by Cyanobacteria Harmful Blooms impairing these nutrient enriched, turbid and polymictic water bodies spread along the Central Plains of Argentina. Under the premise that shallow lakes are sentinels of global climate and eutrophication, a 3-year research in ten lakes located across a clima...
Article
Full-text available
The Salado River basin, Buenos Aires, Argentina, contains numerous permanent shallow lakes under anthropic pressure due to different land uses/land covers (LULC) in their catchments. Here, we explored the relation of LULC in the surrounding areas and the physical and chemical variables of six shallow lakes of the aforementioned basin with phytoplan...
Article
In aquatic systems, an interplay between bottom-up and top-down processes determines the dynamic of picocyanobacteria (Pcy) abundance and community structure. Here, we analyzed a 10-year time series (sampled fortnightly) from a hypereutrophic turbid shallow lake located within the Pampa Region of South America, generating the first long-term record...
Article
Picocyanobacteria (cells <2 µm) can be found either as single-cells (Pcy) or embedded in a mucilaginous sheath as microcolonies or colonies (CPcy). It has been demonstrated that phenotypic plasticity in picocyanobacteria (i.e. the capability of single-cells to aggregate into colonies) can be induced as a response to grazing pressure. The effect of...
Article
Picocyanobacteria (cells <2 µm) can be found either as single-cells (Pcy) or embedded in a mucilaginous sheath as microcolonies or colonies (CPcy). It has been demonstrated that phenotypic plasticity in picocyanobacteria (i.e. the capability of single-cells to aggregate into colonies) can be induced as a response to grazing pressure. The effect of...
Article
The aim of this work was to assess the temporal patterns in the community composition of phytoplankton (PCC) and bacterioplankton (BCC) in two interconnected and hypertrophic Pampean shallow lakes (Argentina). Factors shaping their community dynamics and community temporal covariations were also analysed. We performed 4 years of seasonal samplings...
Article
Full-text available
How diversity is structured has been a central goal of microbial ecology. In freshwater ecosystems, selection has been found to be the main driver shaping bacterial communities. However, its relative importance compared with other processes (dispersal, drift, diversification) may depend on spatial heterogeneity and the dispersal rates within a meta...
Article
Ceratium furcoides is an invasive freshwater dinoflagellate that in the last three decades has expanded its geographic distribution in South America, being recently found in Paraná River floodplain (Argentina). Despite growing concern about the presence and impacts of this invader, information regarding genetic diversity in the southern hemisphere...
Preprint
Full-text available
Determining which processes take place in the spatial distribution of bacterioplankton metacommunities has been a central goal of microbial ecology. In freshwater ecosystems, selection has been spotted as the main driver shaping bacterial community. However, its relative importance compared with others processes (dispersal, drift, diversification)...
Presentation
Full-text available
Las modificaciones antrópicas de los ecosistemas acuáticos favorecen la proliferación de microorganismos invasores que pueden ocasionar alteraciones en la biodiversidad y el funcionamiento ecosistémico. Las especies del dinoflagelado del género Ceratium provenientes del hemisferio norte comenzaron a dispersarse en la década del 90 en América del Su...
Poster
Full-text available
Picocyanobacteria (cyanobacteria <2µm) can be found either as single-cells (Pcy) or embedded in a mucilaginous sheath as microcolonies or colonies (Cpcy). It has been demonstrated that phenotypic plasticity in picocyanobacteria (i.e. the capability of single-cells to aggregate into colonies) can be induced as a response to predation pressure by fl...
Article
Full-text available
The molecular diversity of the aquatic picocyanobacterial community cannot be accurately described using only the available universal 16S rRNA gene primers that target the whole bacterial and archaeal community. We show that the hypervariable regions V5, V6, and V7 of the 16S rRNA gene are better suited to study the diversity, community structure,...
Article
Full-text available
We analyzed the interplay between neutral and deterministic processes in maintaining contrasting alternative bacterioplankton communities through time in highly productive shallow lakes and we evaluated the relevance of these processes when a regime shift from a clear to a turbid state occurred. We observed that local assembly is ruled primary dete...
Article
Full-text available
Dominant primary producer in macrophyte- or phytoplankton-dominated shallow lakes might imply differences in dissolved organic carbon (DOC) composition. We compared chromophoric dissolved organic matter (CDOM), plankton respiration (R), and bacterial (BP) and primary production (PP), in two contrasting shallow lakes. We hypothesized that DOC from t...
Article
Full-text available
We investigated nine Pampean shallow lakes (Argentina) across a moisture gradient (mean annual precipitation 1,000–500 mm), under the frame-work of a network project of lake monitoring whose main objective was to analyse the responses of ecosystems to different stressors associated with human activities. We postulate that species bloom in different...
Article
The province of Córdoba, located in the central region of Argentina, is subdivided into two areas: a hilly area to the west and a plain to the east. The fluvio-lacustrine systems developed in these areas form both exorheic and endorheic basins. The phytoplankton dynamics of these basins is determined mainly by their physicochemical and hydrological...

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Projects

Projects (3)
Project
We are an interdisciplinary group at the Instituto Nacional de Limnología (INALI, Argentina) gathering by our interest in metacommunities. Our research addresses the study of ecological processes driving the structure of natural communities in the floodplain system of the Paraná River, from bacteria to fish.
Project
Evaluar los cambios en las concentraciones de nutrientes y materia orgánica en lagunas de la llanura aluvial del río Paraná Medio con uso ganadero, así como en la capacidad de autodepuración, bajo diferentes condiciones (intensidad de la actividad ganadera, estación del año, estado hidrológico y cobertura vegetal), y analizar el efecto de la vegetación acuática sobre la remoción de nutrientes y materia orgánica aportados por el estiércol. // To evaluate the changes in nutrient and organic matter concentrations in floodplain lakes of the Middle Paraná River with livestock use, as well as in the self-purification capacity, under different conditions (intensity of livestock activity, season, hydrological phase and plant cover), and to analyze the effect of aquatic vegetation on the removal of nutrients and organic matter.