Lorenzo Proia

Lorenzo Proia
University of Vic | UVIC · CT BETA

Ph.D.

About

55
Publications
11,584
Reads
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1,810
Citations
Citations since 2016
33 Research Items
1483 Citations
2016201720182019202020212022050100150200250
2016201720182019202020212022050100150200250
2016201720182019202020212022050100150200250
2016201720182019202020212022050100150200250
Additional affiliations
September 2018 - present
BETA Technological Center
Position
  • Senior Researcher
October 2015 - September 2018
Université Libre de Bruxelles
Position
  • PostDoc Position
March 2015 - July 2015
Universitat de Girona
Position
  • PostDoc Position
Education
April 2007 - October 2010
University of Barcelona
Field of study
  • Experimenatal and applied ecology
April 2007 - July 2012
Universitat de Girona
Field of study
  • Experimental sciences and sustainability
October 1999 - March 2005
University of Rome Tor Vergata
Field of study
  • Biology (Ecology)

Publications

Publications (55)
Article
Full-text available
Freshwater ecosystems are becoming saltier due to human activities. The effects of increased salinity can lead to cascading trophic interactions, affecting ecosystem functioning and energy transfer, through changes in community and size structure. These effects can be modulated by other environmental factors, such as nutrients. For example, communi...
Article
Full-text available
The salinization of freshwaters is a global threat to aquatic biodiversity. We quantified variation in chloride (Cl−) tolerance of 19 freshwater zooplankton species in four countries to answer three questions: (1) How much variation in Cl− tolerance is present among populations? (2) What factors predict intraspecific variation in Cl− tolerance? (3)...
Article
The salinisation of freshwater ecosystems is a global environmental problem that threatens biodiversity, ecosystem functioning and human welfare. The aim of this study was to investigate the potential impact of a realistic salinity gradient on the structure and functioning of freshwater biofilms. The salinity gradient was based on the real ion conc...
Article
Full-text available
Significance The salinity of freshwater ecosystems is increasing worldwide. Given that most freshwater organisms have no recent evolutionary history with high salinity, we expect them to have a low tolerance to elevated salinity caused by road deicing salts, agricultural practices, mining operations, and climate change. Leveraging the results from...
Article
Full-text available
Human-induced salinization increasingly threatens inland waters; yet we know little about the multifaceted response of lake communities to salt contamination. By conducting a coordinated mesocosm experiment of lake salinization across 16 sites in North America and Europe, we quantified the response of zooplankton abundance and (taxonomic and functi...
Article
Full-text available
In recent decades, human activity coupled with climate change has led to a deterioration in the quality of surface freshwater. This has been related to an increase in the appearance of algal blooms, which can produce organic compounds that can be toxic or can affect the organoleptic characteristics of the water, such as its taste and odor. Among th...
Article
Full-text available
Determination of the levels of heavy metal ions would support assessment of sources and pathways of water pollution. However, traditional spatial assessment by manual sampling and off-site detection in the laboratory is expensive and time-consuming and requires trained personnel. Aiming to fill the gap between on-site automatic approaches and labor...
Article
The global increase of cyanobacterial blooms occurrence has been associated with the presence of compounds that generate earthy and musty odour in freshwater systems, among which geosmin stands out. The lack of information on the factors associated to geosmin production by benthic organisms has driven the development of this study, whose main goal...
Article
Potash abandoned mines cause severe environmental damage to their bordering environment, with significant impacts on freshwater ecosystems mostly through uncontrolled discharge of hypersaline effluents. This study aimed to evaluate the ecological impact caused by a hypersaline effluent from an abandoned potash mine (Menteroda, Germany) on freshwate...
Article
Full-text available
Spatial heterogeneity along river networks is interrupted by dams, affecting the transport, processing, and storage of organic matter, as well as the distribution of biota. We here investigated the structure of planktonic (free-living, FL), particle-attached (PA) and sediment-associated (SD) bacterial and archaeal communities within a small reservo...
Article
Abandoned mines cause serious environmental damage to their surroundings with considerable impacts on freshwater ecosystems. These impacts occur mainly due to the uncontrolled discharge of polluted effluents, which may contain high concentrations of heavy metals. Currently, no real solution exists for this important environmental problem, leaving a...
Article
Full-text available
Hydro-morphological alterations in water bodies caused by climate change and human activities affects the ecosystem functioning and generate important water quality problems. Some of these alterations can generate an increase in cyanobacterial blooms, which are associated with the appearance of bad taste and odorous compounds such as geosmin. The f...
Article
This study aims to investigate the prevalence of clinically relevant carbapenemases genes (blaKPC, blaNDM and blaOXA-48) in water samples collected over one-year period from hospital (H), raw and treated wastewater of two wastewater treatment plants (WWTPs) as well as along the Zenne River (Belgium). The genes were quantified in both particle-attac...
Article
Urban rivers are impacted ecosystems which may play an important role as reservoirs for antibiotic-resistant (AR) bacteria. The main objective of this study was to describe the prevalence of antibiotic resistance along a sewage-polluted urban river. Seven sites along the Zenne River (Belgium) were selected to study the prevalence of AR Escherichia...
Article
The main objective of this study was to investigate the antibiotic resistance (AR) levels in wastewater (WW) and the impact on the receiving river. Samples were collected once per season over one year in the WW of a hospital, in the raw and treated WW of two wastewater treatment plants (WWTPs), as well as upstream and downstream from the release of...
Article
Full-text available
Physical heterogeneity determines interstitial fluxes in porous media. Nutrients and organic matter distribution in depth influence physicochemical and microbial processes occurring in subsurface. Columns 50 cm long were filled with sterile silica sand following 5 different setups combining fine and coarse sands or a mixture of both mimicking poten...
Article
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Biofilms are a key component in the nutrient removal from the water column. However, nutrient uptake by biofilms may be hampered by the occurrence of pollutants or other stressors. This study aimed: (i) to investigate the biofilm phosphorus (P) uptake capacity as a relevant process for the maintenance of fluvial water quality and (ii) to explore th...
Article
Full-text available
Controls on the degradation of dissolved organic matter (DOM) are complex but key to understand the role of freshwaters in the carbon cycle. Both the origin and previous degradation history have been suggested to determine DOM reactivity, but it is still a major challenge to understand the links between DOM composition and biodegradation kinetics....
Article
Full-text available
We investigated photoinhibition on natural communities of ammonia oxidizing (AO) archaea (AOA) and bacteria (AOB) embedded in complex stream biofilms, and its implications on nitrogen uptake at biofilm scale. Based on the strong photoinhibition previously exhibited by free living and cultured AOA and AOB, we expected AO activity to decrease in biof...
Article
Full-text available
The hydrological continuum in rivers can be altered by the presence of small dams that modify the water residence time (WRT) and prevailing habitat, turning lotic river sections into lentic ones and influencing downstream reaches. The structure and activity of the microbial community occurring in the benthic and planktonic compartments can be modif...
Article
Full-text available
Interactions between emerging contaminants and other drivers of community structure and function are poorly known. We used laboratory microcosms to investigate the single and combined effects of grazing and triclosan toxicity on the structure and function of stream periphyton. Grazing alone strongly reduced algal biomass, but also reduced oxidative...
Chapter
Algae in rivers are affected by light, water turbulence, and nutrient availability. These environmental factors ultimately affect algae according to their habitat, growth form, and specific physiological abilities. Water flow imposes limitations in the diffusion and availability of gases and resources, also in relation to algal size and growth form...
Article
Stream microbial communities and associated processes are influenced by environmental fluctuations that may ultimately dictate nutrient export. Discharge fluctuations caused by intermittent stream flow are increasing worldwide in response to global change. We examined the impact of flow cessation and drying on in-stream nitrogen cycling. We determi...
Article
The extensive use of antibiotics in human and veterinary medicine and their subsequent release into the environment may have direct consequences for autochthonous bacterial communities, especially in freshwater ecosystems. In small streams and rivers, local inputs of wastewater treatment plants (WWTPs) may become important sources of organic matter...
Article
Intermittent streams are dynamic ecosystems that alternate between dry and wet states. Despite their global dominance, we have scant information about the effects of surface flow drying on terrestrial arthropods in channel and adjacent terrestrial habitats. In the present study, we used pitfall traps to characterise the terrestrial arthropod assemb...
Chapter
Full-text available
Nowadays, biofilms are one of the principal targets of community ecotoxicology in aquatic ecosystems with a high potential for future use in ecotoxicology. A large set of methods derived from biofilm ecology has successfully been applied in ecotoxicology providing a diverse and comprehensive toolbox. Our ability to quantify the effects of pollution...
Book
Nowadays, biofilms are one of the principal targets of community ecotoxicology in aquatic ecosystems with a high potential for future use in ecotoxicology. A large set of methods derived from biofilm ecology has successfully been applied in ecotoxicology providing a diverse and comprehensive toolbox. Our ability to quantify the effects of pollution...
Article
Large-scale factors associated with the environmental context of streams can explain a notable amount of variability in patterns of stream N cycling at the reach scale. However, when environmental factors fail to accurately predict stream responses at the reach level, focusing on emergent properties from small-scale heterogeneity in N cycling rates...
Article
Full-text available
Deductions about the ecology of high taxonomic bacterial ranks (i.e., phylum, class, order) are often based on their abundance patterns, yet few studies have quantified how accurately variations in abundance of these bacterial groups represent the dynamics of the taxa within them. Using 454-pyrosequencing of the 16S rRNA gene, we investigated wheth...
Article
Full-text available
During summer drought, Mediterranean fluvial networks are transformed into highly heterogeneous landscapes characterized by different environments (i.e., running and impounded waters, isolated river pools and dry beds). This hydrological setting defines novel biogeochemically active areas that could potentially increase the rates of carbon emission...
Article
Full-text available
Water reuse is becoming a common practice in several areas in the world, particularly in those impacted by water scarcity driven by climate change and/or by rising human demand. Since conventional wastewater treatment plants (WWTPs) are not able to efficiently remove many organic contaminants and pathogens, more advanced water treatment processes s...
Article
The Llobregat is a Mediterranean river that is severely impacted by anthropogenic pressures. It is characterized by high flow variability which modulates its chemical and biological status. The present work evaluates the effects of flow changes on the concentration of pharmaceutically active compounds (PhACs) and their relationship to cellular para...
Chapter
This chapter aims to review the current literature on field studies assessing the effects of pharmaceutically active compounds (PhACs) on fluvial biological communities. The importance of the use of these communities in the ecological risk assessment of PhACs in river ecosystems is tackled. The chapter reviews the literature about the potential eff...
Article
Antibiotics are emerging contaminants, which wing to their bioactivity, may lead to short-term and long-term alterations of natural microbial communities in aquatic environment. We investigated the effects of antibiotics on biofilm bacterial communities in the Llobregat River (Northeast Spain). Three sampling sites were selected: two less polluted...
Article
Large rivers are commonly regulated by damming, yet the effects of such disruption have seldom been studied on prokaryotic communities. We describe the effects of the three large reservoirs of the Ebro river (NE Iberian Peninsula) on bacterioplankton assemblages by comparing several sites located before and after the impoundments on three occasions...
Article
Full-text available
Nutrients and light are the most determinant factors for microbial benthic assemblages in oligotrophic forested streams. We investigated the importance of nutrients and light availability on the structure and the function of epilithic biofilms in a Mediterranean forested stream (Fuirosos, Spain). Biofilms grew on artificial substrata in both enrich...
Chapter
Full-text available
Nowadays, the term biomarker has become widespread in environmental sciences and ecology as shown by the increasing amount of research articles published on this topic in these research areas (2,042 articles published between 2000 and 2010 over a total of 2,352 published since 1985, WOK, ISI Web of Knowledge, http://www.isiknowledge.com). Despite t...
Chapter
Full-text available
The aim of this chapter is to highlight the importance of microbial attached communities in the assessment of the effects of pollutants on freshwater ecosystems. We particularly focus on the role of heterotrophs in biofilms developing on different substrata. Firstly, an overview of the importance of microbial communities for the whole ecosystem pro...
Article
The consequences of global change on rivers include altered flow regime, and entrance of compounds that may be toxic to biota. When water is scarce, a reduced dilution capacity may amplify the effects of chemical pollution. Therefore, studying the response of natural communities to compromised water flow and to toxicants is critical for assessing h...
Article
The effects of the herbicide Diuron (DIU) and the bactericide Triclosan (TCS) were assessed on laboratory-grown stream biofilms. Four week-old biofilms were exposed in mesocosms to 48-hours of short pulses of either DIU or TCS. The direct and indirect effects of each toxicant on the biofilms, and the subsequent recovery of the biofilms, were evalua...
Article
Bacterial community composition was assessed during riverine biofilm development by the Catalyzed Reporter Deposition Fluorescence In Situ Hybridization (CARD-FISH) in combination with Confocal Laser Scanning Microscopy. Using artificial substrates, it was possible to follow the dynamics of specific bacterial clusters, while maintaining the unalter...
Article
Triclosan is a commonly used bactericide that survives several degradation steps in WWTP (wastewater treatment plants) and potentially reaches fluvial ecosystems. In Mediterranean areas, where water scarcity results in low dilution capacity, the potential environmental risk of triclosan is high. A set of experimental channels was used to examine th...
Article
Full-text available
We studied the adverse effects of triclosan, a widely used biocide commonly reported in surface waters, on the structure and function of benthic diatom communities. Laboratory-grown biofilms were exposed (i) to chronic contamination by increasing concentrations of triclosan and (ii) to a short-pulse of sublethal triclosan concentrations followed by...
Article
Nutrient retention efficiency, an indicator of stream function, has become a significant focus of research in fluvial biogeochemistry. The most popular method used to measure nutrient retention efficiency is constant rate addition (CRA), although studies using pulse addition (PA) as an alternative have been published. The similarities of the result...
Article
Among increasingly used pharmaceutical products, beta-blockers have been commonly reported at low concentrations in rivers and littoral waters of Europe and North America. Little is known about the toxicity of these chemicals in freshwater ecosystems while their presence may lead to chronic pollution. Hence, in this study the acute toxicity of 3 be...
Article
The Water Framework Directive of the European Union requires achievement of good chemical and ecological status in river systems. Risk assessment for toxicants is mostly based on individual single-species tests, though extrapolation of such results to ecosystem evaluation is often afflicted with uncertainties. Advances include higher-tier testing,...
Article
Full-text available
We present an overview of possible links between chemical contamination and the diversity of fluvial communities, in order to assess how conventional and more recently developed methodologies used to estimate the diversity of rivers and streams could be used to explore this relationship. We analyze different trophic levels (bacteria, autotrophic bi...

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Projects

Projects (6)
Project
The objective of this project is to evaluate the triggers of geosmin episodes in a Mediterranean river as well as to develop a tool for predicting T&Os episodes that can be useful to drinking water companies.
Project
Proyecto coordinado por el Centro Tecnológico BETA de la UVic-UCC y financiado por la Fundación Española para la Ciencia y la Tecnología-Ministerio de Ciencia, Innovación y Universidades (FECYT). El proyecto tiene como objetivo principal promover la enseñanza del método científico a través del estudio de una problemática ambiental real pero poco conocida como es la contaminación de residuos plásticos en nuestros ríos y su papel de transportadores hasta el mar.