Joaquin Cochero

Joaquin Cochero
Instituto de Limnología "Dr. Raúl A. Ringuelet" | ILPLA · Plancton & Biofilms

PhD

About

50
Publications
8,216
Reads
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248
Citations
Introduction
Joaquin Cochero currently works at the Plancton y Biofilms, Instituto de Limnología "Dr. Raúl A. Ringuelet". Joaquin does research in Biofilms, Ecology, Environmental Monitoring. His current projects include 'AppEAR: citizen science in freshwater habitats' and 'Estudio hidrológico y ecológico de bañados de desborde para la conservación de sistemas fluviales y mitigación de inundaciones en la llanura pampeana: medidas para la gestión y rehabilitación'.
Additional affiliations
June 2009 - present
Instituto de Limnología "Dr. Raúl A. Ringuelet"
Position
  • Researcher
Education
June 2010 - November 2013
January 2010 - January 2011
Universidad de León
Field of study
  • Environmental Science
March 2002 - June 2007

Publications

Publications (50)
Article
Full-text available
Plastics, especially microplastics (<5 mm in length), are anthropogenic polymer particles that have been detected in almost all environments. Microplastics are extremely persistent pollutants and act as long-lasting reactive surfaces for additives, organic matter, and toxic substances. Biofilms are microbial assemblages that act as a sink for parti...
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
There are several identification tools that can assist researchers, technicians and the community in the recognition of Chagas vector insects (triatomines), from other insects with similar morphologies. They involve using dichotomous keys, field guides, expert knowledge or, in more recent approaches, through the classification by a neural network o...
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
The objective was to establish possible temporal patterns in the microplastics (MPs) abundance in the water and in the intertidal sediment in an urbanized location of the Río de la Plata estuary (Argentina), in relation to environmental factors. The site was sampled monthly for a year (February 2019–January 2020). The presence of MPs was recorded,...
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
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...
Article
Full-text available
The aim of this work was to analyze the effects of riverine wetlands on the water quality and river metabolism. For this purpose, four streams were studied: two of them surround a peri-urban area and have well-preserved riverine wetlands associated with the main channel, and the other two run through an urban area with the consequent degradation of...
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
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...
Article
Agricultural activities can affect the delivery of nutrients to streams, riparian canopy cover, and the capacity of aquatic systems to process nutrients and sediments. There are few measures of nutrient uptake and metabolism from tropical or sub-tropical streams in general, and even fewer from tropical regions of South America. We examined ammonium...
Presentation
Presentación en la FCNyM de la Universidad Nacional de La Plata
Article
Bioengineering techniques are currently used to restore degraded habitats in human-altered streams. Aquatic plants used in these techniques can additionally contribute to reducing excess nitrogen (N) from point sources via assimilation. Moreover, leachates from plant leaf-litter can serve as an additional source of labile dissolved organic matter (...
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...
Conference Paper
Full-text available
En los sistemas fluviales de llanura pampeana es posible reconocer zonas que adquieren transitoriamente características lénticas, reconocidos como bañados de desborde fluvial. Se trata de ambientes permanentes o semipermanentes, de contorno o perímetro indefinido y con vegetación emergente abundante. Este tipo de humedal ofrece múltiples beneficios...
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...
Presentation
Full-text available
PPT Presentation for the AppEAR project in TICL2018, Cartagena
Article
Full-text available
Citizen science, or participatory science, is the process by which the general public actively contributes with scientific projects. Citizen science projects have proliferated in the few last decades thanks to the Internet and are proving to be a great complement to the more “traditional” environmental monitoring efforts. AppEAR (an app to evaluate...
Article
Full-text available
Citizen science, or participatory science, is the process by which the general public actively contributes with scientific projects. Citizen science projects have proliferated in the few last decades thanks to the Internet and are proving to be a great complement to the more “traditional” environmental monitoring efforts. AppEAR (an app to evaluate...
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
Wastewater treatment plant (WWTP) effluents are sources of dissolved organic carbon (DOC) and inorganic nitrogen (DIN) to receiving streams, which can eventually become saturated by excess of DIN. Aquatic plants (i.e., helophytes) can modify subsurface water flowpaths as well as assimilate nutrients and enhance microbial activity in the rhizosphere...
Article
The objective of the present article is to propose an index that allows the assessment of the fluvial habitat quality in lowland streams that run through urbanized areas, by the use of metrics related to the quality of the watercourse, the river banks, the riparian zone and the fluvial geomorphology. The metrics retained in the index (USHI, Urban S...
Article
Chronic and pulse increments of salinity can cause different consequences on the aquatic communities, and its effects are related to factors such as the magnitude, frequency and ionic composition, as well as on the baseline salt concentrations in the water. The aim of this study was to explore the responses of the biofilms from a nutrient-rich stre...
Poster
Los microplásticos, partículas menores a 5mm, considerados contaminantes emergentes en los ecosistemas acuáticos, son transportados por el agua y se acumulan en las costas. Sus consecuencias son más estudiadas en el medio marino que en el agua dulce. Los organismos interactúan con los microplásticos por dos vías, ingiriéndolos y/o colonizándolos. A...
Conference Paper
Full-text available
El aumento de la disponibilidad de dispositivos móviles en las últimas dos décadas, como celulares y tablets, ha facilitado el desarrollo de lo que se denomina E-ciencia ciudadana, término referido al uso de tecnologías de información y comunicación en proyectos científicos en los que se involucra la participación de voluntarios. AppEAR es un proye...
Chapter
Full-text available
Hydrological ecosystem services involve the regulation of water flows, the reduction of the flooding impact, the soil erosion and the sediment accumulation in the watercourses, also including the maintenance and improvement of the water quality, the aquiferous recharge and the aquatic habitats. The impermeability of the soil due to urbanization, th...
Poster
Full-text available
Introducción. Los macroinvertebrados son un grupo bien representado en los ecosistemas de agua dulce y ampliamente utilizados en la evaluación de la calidad del agua. Problema. Muchos índices bióticos utilizados para tal fin se basan en valores de tolerancia estimados en ciertos casos a partir de información obtenida de la bibliografía, no siempre...
Article
The aim of this study was to explore the responses of the epipelic biofilm of a Pampean stream with little impact from human activity to two environmental conditions, with joint modifications in nutrients, temperature, water velocity and turbidity. The experiment was conducted using artificial channels and lasted five weeks. The biological variable...
Article
Full-text available
In streams and rivers, the first organisms which directly receive and respond to nutrients are primary producers (algae, macrophytes) and microbial heterotrophs (bacteria, fungi) since they rely on available inorganic nutrients from the water column. The aim of the present study was to analyze the response of the epipelic microbial biofilm in a Pam...
Article
Full-text available
La valoración ambiental de las riberas es una tarea necesaria para conocer el estado ecológico de los cursos de agua, lo cual permite evaluar los méritos de eventuales experiencias de manejo, impactos antropogénicos o bien detectar problemas ambientales de forma temprana. En tal sentido, el objetivo de este estudio fue desarrollar una metodología p...
Article
Full-text available
Evaluating the coastal environment is a necessary task to assess the ecological status of water bodies, which allows to determine the merits of management programs, anthropogenic impacts, or to detect early signs of environmental impacts. To this purpose, the objective of this research was to develop a methodology to assess the habitat quality in t...
Article
Full-text available
We assessed the effects of nutrient enrichment on three stream ecosystems running through distinct biomes (Mediterranean, Pampean and Andean). We increased the concentrations of N and P in the stream water 1.6–4-fold following a before–after control–impact paired series (BACIPS) design in each stream, and evaluated changes in the biomass of bacteri...
Presentation
Full-text available
Brief explanation of the Karku project, a software to calculate biotic indices in Argentina
Conference Paper
Full-text available
El objetivo del desarrollo del software KARKU es facilitar la obtención, el tratamiento y la interpretación de la información generada por los índices bióticos, facilitando así establecer la calidad ecológica de los distintos ecosistemas acuáticos de la Argentina. Estas herramientas de monitoreo exploran la respuesta de las comunidades a los cambio...
Conference Paper
Full-text available
Establecer una base de datos con la información aportada por los índices bióticos empleados para evaluar y monitorear cursos de agua de Argentina y generar mapas sobre la calidad biótica constituyó uno de los lineamientos y metas que se fijaron en el “Taller de Bentos: Ecología y Sistemática”, realizado en noviembre de 2011 en la ciudad de Cayastá...
Article
Full-text available
The epipelic biofilm is a biologic complex of autotrophs (algae) and heterotrophs(fungi, bacteria, microinvertebrates) embedded in a polysaccharide matrix that developson the fine sediments (silt and clay) of many aquatic ecosystem worldwide of lowlandfluvial streambeds. Biofilms play a key role in the energetic balance of the fluvialsystems, contr...
Article
The relationship between microbenthic communities, the habitat characteristics, and physical and chemical gradients was studied in the Rio de la Plata estuary. Five replicates of the surface layer were collected seasonally, in 10 sampling sites influenced by different land uses. The distribution of microbenthic communities was governed by two gradi...
Chapter
The epipelic biofilm is a biologic complex of autotrophs (algae) and heterotrophs (fungi, bacteria, microinvertebrates) embedded in a polysaccharide matrix that develops on the fine sediments (silt and clay) of many aquatic ecosystem worldwide of lowland fluvial streambeds. Biofilms play a key role in the energetic balance of the fluvial systems, c...

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Projects

Projects (6)
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.
Project
This is my main research in biofilms. The aim is to research functional and structural characteristics of stream biofilms to identify those that indicate environmental disturbances and their potential use as monitoring tools, and the role of biofilms in self-depuration processes.