Postolache C.

Postolache C.

About

40
Publications
11,036
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704
Citations
Citations since 2017
12 Research Items
314 Citations
201720182019202020212022202301020304050
201720182019202020212022202301020304050
201720182019202020212022202301020304050
201720182019202020212022202301020304050
Introduction

Publications

Publications (40)
Preprint
Zoosporic parasites (i.e. fungi and fungi-like aquatic microorganisms) constitute important drivers of natural populations, causing severe host mortality. Economic impacts of parasitic diseases are notable in the microalgae biotech industry, affecting production of food ingredients, biofuels, pharma- and nutraceuticals. While scientific research on...
Article
Full-text available
Molecular biology protocols have been more and more accessible to researchers for ecological investigations. However, these protocols always require optimization steps for the analysis of specific types of samples. This study aimed to optimize a molecular protocol to analyze cyanobacterial 16S rRNA in Danube Delta shallows lakes. In this regard, se...
Article
The effects of agricultural practices upon soil microbiota were assessed in case of a long-term (42 years) tillage and fertilization experiment run on Chernozem soil under maize monoculture, as well as by comparing the experimental field with a grassland located nearby. We measured overall microbial biomass carbon (Cmic) as an indicator for total c...
Preprint
Full-text available
Environmental genetics-related modern methods are shown as important indicators of various cyanotoxins syntheses, and their knowledge and use are critically analyzed. Microcystins and other cyanotoxins loads and syntheses are related to different drivers, like various chemical elements and compounds (especially nutrients, such as nitrogen and phosp...
Preprint
Full-text available
Molecular biology protocols have been more and more accessible to researchers for ecological investigations, however, these protocols always require optimization steps for the analysis of specific types of samples. The purpose of this study was to optimize a molecular protocol for the analysis of cyanobacterial 16S rRNA in Danube Delta shallows lak...
Technical Report
Full-text available
In the autumn 2017 we have launched “The structure of a transdisciplinary research consortium for bio-geo-interactions research and integrated river basin management” (Lăcătușu et al. 2017). We have targeted in partnerships since 2007 the trans-disciplinary topic of river basin management under the pressure of pollutants and climate changes at diff...
Article
Full-text available
Danube Delta shallow lakes experience cyanobacteria blooms that can negatively affect the aquatic ecosystem. Although there are several studies on Danube Delta cyanobacteria, little is known about their spatial–temporal patterns and the potential predictive role they can offer. We therefore analyzed the distribution of cyanobacteria in 19 lakes bel...
Article
Aquatic ecosystems are reservoirs of antibiotic-resistant bacteria (ARB) and antibiotic resistance genes (ARGs), having a major role in their occurrence, accumulation and dissemination. The purpose of this review is to highlight the influence of wastewater treatment plants (WWTP) effluents, manure and biosolids use in agriculture as well as of aqua...
Article
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Current landscapes have been intensively modified by humans and forest fragmentation has created substantial increases of forest edges. So far, scale-dependence between observable ecological patterns and the underlying processes affected by forest fragmentation have been widely ignored. To overcome the widespread ambiguity in selecting relevant spa...
Article
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Neuropsychiatric disorders are induced by various risk factors, including direct exposure to environmental chemicals. Arsenic exposure induces neurodegeneration and severe psychiatric disorders, but the molecular mechanisms by which brain damage is induced are not yet elucidated. Our aim is to better understand the molecular mechanisms of arsenic t...
Article
Conversion of natural ecological systems has been one of the greatest human impact on terrestrial ecosystems. The expansion of anthroposphere altered virtually all biogeochemical cycles of elements. Nitrogen holds a key place in sustaining life and presents unique traits such as broad chemical speciation and mobility within the environmental compar...
Article
Full-text available
Habitat fragmentation is one of the most severe anthropogenic pressures exerted on ecosystem’s biodiversity. Empirical studies to date focused with an overriding interest on the effects of habitat loss or habitat fragmentation per se on species richness patterns detrimental to biogeochemical processes. To account for changes in ecosystem fluxes, we...
Article
The study uses activated algae granules for low-strength wastewater treatment in sequential batch mode. Each treatment cycle was conducted within 24 h in a bioreactor exposed to 235 μmol/m2/s light intensity. Wastewater treatment was performed mostly in aerobic conditions, oxygen being provided by microalgae. High removal efficiency of chemical oxy...
Article
Enhanced nitrogen inputs to both terrestrial and aquatic ecosystems affects biodiversity at all its levels. Grasslands provide a complex range of functions, due to their wide representation throughout terrestrial ecosystems. Numerous studies demonstrate soil acidification, eutrophication and species richness reduction as a result of elevated reacti...
Article
A microalgae-bacteria system was used for dairy industry wastewater treatment in sequenced batch mode in a photobioreactor. The research investigated the influence of two light intensities: 360 and 820 μmol m(-2)s(-1) on treatment performances, microalgal cell recovery and dynamics of the protozoan community. Results showed that the light intensity...
Article
Full-text available
Use of microalgal–bacterial consortium in biological wastewater treatment can represent a feasible alternative for sustainable wastewater treatment requirements and support for algal productivity. The advantages emerge from the ability of microalgal taxa to perform photosynthetic process and achievement of nutrients exchange between microalgae and...
Article
Full-text available
Biodiversity loss, as a result of human activities, affects ecosystem productivity and sustainability. Along with climate change and habitat reduction, enhanced nitrogen inputs via atmospheric deposition represent the major drivers of biodiversity reduction. Nitrogen is a limiting factor for ecosystems. Increased bioavailable nitrogen due to increa...
Article
Full-text available
The effect of heavy metals’ immobilization with natural zeolitic tuffs and with organo-zeolitic material in soils polluted by Pb, Zn, Cu and Cd affected by the nonferrous metallurgy industry it has been studied in an experiment with Lolium perenne in laboratory and greenhouse conditions. Surface soil samples (0-20 cm) of 100 kg each (as global samp...
Article
Full-text available
An intensive study was carried out at the level of Dambovnic River, aiming to characterize the spatial and temporal dynamics of nutrient fluxes in correlation to the catchment hydrogeomorphological characteristics and to obtain an improved process-understanding of nutrients pathways. Dambovnic River is a third order tributary of Danube River, previ...
Article
Full-text available
This paper explores major opportunities and challenges of the development of multi-functional forestry in Europe by analysing existing attitudes of forestry stakeholders from Netherlands, Poland, Romania, Sweden and the UK. The research applies a combination of qualitative social science (participatory) approaches and quantitative tools as a means...
Article
1. We carried out a coordinated survey of mountain lakes covering the main ranges across Europe (including Greenland), sampling 379 lakes above the local tree line in 2000. The objectives were to identify the main sources of chemical variability in mountain lakes, define a chemical classification of lakes, and develop tools to extrapolate our resul...
Article
Full-text available
Nitrogen and phosphorous exchange at the water–sediment interface is controlled both by complex physico-chemical factors and biological processes. Zoobenthos excretion is one of the most important processes in the mineralization of sedimented organic mater. In polluted freshwaters, tubificid worms are among the dominant components of the benthic co...
Article
Full-text available
In the framework of the project daNUbs (Nutrient Management in the Danube Basin and its Impact on the Black Sea) the MONERIS emission model is used for the basin wide calculation of nutrient (nitrogen and phosphorus) emissions in the Danube Basin. The MONERIS model was developed and successfully applied for German river catchments. Based on investi...
Article
Full-text available
In this paper, results from rivers of different sizes in Romania, Hungary and Austria are presented. The paper shows the dynamics of extreme events and their contribution to the total P and suspended solids transported in these rivers. Special attention is paid to the influence of the size of the catchment and the event probability on the relative...
Article
Full-text available
Importance of tubificid populations on nitrogen cycle in two categories of shallow eutrophic lakes in the Danube Delta was quantitatively assessed for the 1992-1993 period. The structure of the primary producers in the studied lakes was used to discriminate between the two categories:(i) lakes dominated by macrophytes (A1) and (ii) lakes dominated...
Article
It is well known that the structure of BSA explains its capacity to interact both hydrophobically and hydrophilically with other biochemical species. In the native state the BSA molecule takes such a conformation that the polar residues of amino-acids are oriented towards the outside the molecule and the non-polar residues are directed prevalently...
Article
Full-text available
Transition towards hypertrophy has affected biodiversity and productivity of most aquatic and wetland systems in the Lower Danube Wetland System (LDWS) over the last two decades. The aquatic macrophytes have been deeply involved in ecosystem reorganization in these circumstances. Representative shallow lakes and channels located in the river floodp...
Article
Full-text available
We evaluated nitrogen (N) removal efficiency by riparian buffers at 14 sites scattered throughout seven European countries subject to a wide range of climatic conditions. The sites also had a wide range of nitrate inputs, soil characteristics, and vegetation types. Dissolved forms of N in groundwater and associated hydrological parameters were meas...
Article
Full-text available
Importance of tubificid populations in phosphorous budget in eight eutrophyc shallow lakes in the Danube Delta was quantitatively assessed for the 1992 and 1993. Phosphorous stocks in tubificid biomass accounted for up to 23.48% from the amount stocked in phytoplankton, and for 0.33% to 5.87% from the phosphorous load in water body. These values sh...
Article
Full-text available
Specimens of mussels species Anodonta anatina, Unio pictorum, U. tumidus and surfical sediment samples were collected in the summers of 1994 and 1995 from twelve lakes in the Danube Delta, Romania. Whole mussel tissues were analyzed for metals (Ag, As, Cd, Co, Cu, Cr, Ni, Pb, Se and Zn), and sediment samples were subjected to weak acid extraction a...

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Projects (2)
Archived project
Proiectul vizează dezvoltarea competenţelor experţilor implicaţi în evaluarea datelor şi informaţiilor din fişele tehnice ale dosarelor de evaluare pentru substanţe şi produse chimice periculoase. www.ecologie.bio.unibuc.ro/proexpert