In situ determination of the effects of lead and copper on cyanobacterial populations in microcosms

Biomass has been studied as biomarker to evaluate the effect of heavy metals on microbial communities. Nevertheless, the most important methodological problem when working with natural and artificial microbial mats is the difficulty to evaluate changes produced on microorganism populations that are...

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Veröffentlicht in:PloS one 2009-07, Vol.4 (7), p.e6204-e6204
Hauptverfasser: Burnat, Mireia, Diestra, Elia, Esteve, Isabel, Solé, Antonio
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Diestra, Elia
Esteve, Isabel
Solé, Antonio
description Biomass has been studied as biomarker to evaluate the effect of heavy metals on microbial communities. Nevertheless, the most important methodological problem when working with natural and artificial microbial mats is the difficulty to evaluate changes produced on microorganism populations that are found in thicknesses of just a few mm depth. Here, we applied for first time a recently published new method based on confocal laser scanning microscopy and image-program analysis to determine in situ the effect of Pb and Cu stress in cyanobacterial populations. The results showed that both in the microcosm polluted by Cu and by Pb, a drastic reduction in total biomass for cyanobacterial and Microcoleus sp. (the dominant filamentous cyanobacterium in microbial mats) was detected within a week. According to the data presented in this report, this biomass inspection has a main advantage: besides total biomass, diversity, individual biomass of each population and their position can be analysed at microscale level. CLSM-IA could be a good method for analyzing changes in microbial biomass as a response to the addition of heavy metals and also to other kind of pollutants.
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subjects Analysis
Archaea
Bacteria
Bioindicators
Biomarkers
Biomass
Biotechnology/Applied Microbiology
Borzia
Colony Count, Microbial
Confocal
Confocal microscopy
Copper
Copper - pharmacology
Cyanobacteria
Cyanobacteria - drug effects
Cyanobacteria - growth & development
Ecology/Environmental Microbiology
Ecosystems
Forest soils
Heavy metals
Image processing
Inspection
Laboratories
Lasers
Lead
Lead - pharmacology
Leptolyngbya
Marine and Aquatic Sciences/Microbiology
Mats
Methods
Microbial activity
Microbial mats
Microbiology/Environmental Microbiology
Microcoleus
Microcosms
Microorganisms
Microscopy
Microscopy, Confocal
Oscillatoria
Pollutants
Populations
Scanning microscopy
Sediments
Soil contamination
Water Pollutants, Chemical - pharmacology
title In situ determination of the effects of lead and copper on cyanobacterial populations in microcosms
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