María Mercedes Nicolosi Gelis

María Mercedes Nicolosi Gelis
Instituto de Limnología "Dr. Raúl A. Ringuelet" | ILPLA · Plancton y biofilms

PhD

About

21
Publications
1,939
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31
Citations
Citations since 2016
21 Research Items
31 Citations
201620172018201920202021202202468101214
201620172018201920202021202202468101214
201620172018201920202021202202468101214
201620172018201920202021202202468101214

Publications

Publications (21)
Article
Diatom-based tools like biotic indices, ecological and morphological traits, are widely used to detect changes in water quality. Here we present DiaThor, a free and open source R package for calculating biotic and ecological indices and metrics for diatom samples. A web application (in Shiny) was also developed to provide access to the package for...
Article
Full-text available
Stream biofilms are among the first to react to environmental degradation, since their structural and functional characteristics are tightly linked to the physicochemical variables in the water and sediment. The objectives of this research were to study the differences in chlorophyll-a, bacterial density and metabolism endpoints of epipelic biofilm...
Article
Riparian areas of riverine plains develop extensive floodable areas named riverine wetlands, which are essential to the water cycle balance and ecosystem dynamics. In this study, we contrasted the hydrological and physicochemical variables of riverine wetlands of both peri-urban areas impacted by intensive farming and those of rural areas with the...
Preprint
Full-text available
1- Diatoms are widely used to detect changes in water quality due to their specific sensibility to a variety of environmental conditions. Among the different diatom-based tools to measure water quality, the biotic indices, ecological and morphological traits are the most commonly used. 2- DiaThor, contains 18 functions that provide morphological da...
Article
Full-text available
Los bañados de desborde fluvial (BDF) desempeñan un papel integral en la ecología de las cuencas fluviales y en su capacidad de autodepuración. La demanda antrópica de espacio y agua pone en riesgo su biota y los beneficios ecosistémicos que brindan. Los objetivos del trabajo fueron analizar los ensambles de microorganismos que habitan en BDF, rela...
Article
Diatoms respond to toxicants in lotic systems, and they are commonly considered to be sensitive indicators in environmental safety assessment. In addition to the structural characteristics of the algal populations, recent studies have shown that endpoints such as nuclear anomalies or diatom motility measures can be affected quickly by environmental...
Code
Calculates ecological information and biotic indices for diatoms in a sample. It includes number/shape of chloroplasts diversity indices, size classes, ecological guilds, and multiple biotic indices. The package can also be downloaded from CRAN
Preprint
Full-text available
Multiple structural and functional endpoints of stream biofilms are employed by water quality monitoring programs to detect both direct and indirect environmental impacts. Since multiple co-occurring stressors influence biofilm development, active biomonitoring (translocation experiments) could provide a useful monitoring tool that reflects the ove...
Article
The calculation of autoecological data, such as optima and tolerance ranges to environmental variables, can be useful to establish the distribution and abundance of the species. These calculations, although mathematically not complex, can be prone to error when using a large database. We show how to calculate the optimum value and tolerance ranges...
Code
Calculates autoecological data (optima and tolerance ranges) of a biological species given an environmental matrix. You can also download it directly from CRAN
Article
In this study we explored the use of less conventional diatom metrics (motility, nuclear abnormalities and ecological guilds) to measure changes in diatom assemblages related to the transfer of epipelic communities from urban impacted streams to less impacted sites. Three lowland streams in the Argentine Pampean plain were selected, and two sites w...
Article
The colonisation patterns of diatom assemblages were studied on artificial substrates in lowland streams with different urban pollution levels. Density, diversity, colonisation rates, ecological guilds and cell size classes of the assemblage at each of two sites were followed for 1 week. In addition, assemblages growing on glass, in natural epipeli...
Preprint
Full-text available
Calculation of autoecological data, such as optima and tolerance ranges to environmental variables, can be useful to establish the distribution and abundance of the species. These calculations, although mathematically not complex, can be prone to error when using a large database. We present an R package (“optimos.prime”) that uses species’ abundan...
Poster
Full-text available
El objetivo de este estudio fue analizar las respuestas estructurales y metabólicas en biofilms epipélicos causadas por su transferencia de tramos de arroyos urbanos con bajo impacto antrópico hacia tramos más impactados. Los biofilms son sensibles a los cambios en la calidad del agua, generalmente incrementando su actividad y desarrollo en ambient...
Article
The aim of this study was to describe the colonization of the biofilm during its early stages under different concentrations of nutrients and organic matter, specifically in urban streams influenced by agriculture and urbanization. We hypothesized that in a stream with higher concentrations of nutrients and organic matter, the initial biomass growt...
Poster
El objetivo del presente estudio fue evaluar la colonización temprana del ensamble de diatomeas bentónicas en sustratos artificiales bajo distintas condiciones de la calidad del agua en dos arroyos pampeanos. Para esta finalidad se colocaron vidrios esmerilados estériles como sustrato artificial, paralelos al sustrato natural, en ambos arroyos, que...
Article
Macrophytes were transplanted into a lowland stream affected by river engineering works. The aim was to analyse the feasibility of their reintroduction and potential to be used for the recovery of the structure and complexity of the lotic habitat. Macrophytes contribute heterogeneity to streams, modify the current velocity, affect sediment and nutr...

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Projects

Projects (2)
Project
We share the tools we make to speed up tasks in our lab! R packages, scripts, software, etc. for analysis in limnology
Project
Canales de drenaje como fuentes puntuales de contaminación en arroyos. Uso de vegetación en canales para mitigar el impacto de los agroquímicos en los arroyos. Impacto diferencial de diferentes modelos de producción. Adecuación de herramientas de mitigación en base al tipo de producción.** Drainage ditches as point sources of pollution in streams. Use of vegetation in ditches to mitigate agrochemicals' impact on streams. Differential impact of different production modality. Adequacy of mitigation tools according to production modality.