UV–C irradiation as a tool to eradicate algae in caves

Borderie, Fabien; Alaoui-Sehmer, Laurence; Naoufal, Raouf; Bousta, Faisl; Orial, Geneviève; Rieffel, Dominique; Alaoui-Sossé, Badr

doi:10.1016/j.ibiod.2011.02.005

Cited by 29 publications

(19 citation statements)

References 15 publications

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“…Few studies have been carried out on the UV-C effect on established algal colonies. Borderie et al (2011) showed that after various periods of UV-C exposure, the photosynthetic activity of algae was strongly decreased and even annihilated, which could be related to a degradation of their photosynthetic apparatus and pigment contents. After UV-C exposure, algal cells reinoculated on fresh medium were unable to proliferate (Borderie et al, 2011).…”

Section: Wavebands Of Uv Radiation: Differential Effects On Algaementioning

confidence: 99%

“…UV-C radiation generates oxidative stress and genotoxicity effects. It is also known (Borderie et al, 2011) to induce programmed cell death (PCD) by a production of cyclobutanepyrimidine dimers and DNA photoproducts, which are involved in cellular lethality, senescence and mutagenesis (references in Bordrerie et al, 2011).…”

Section: Wavebands Of Uv Radiation: Differential Effects On Algaementioning

confidence: 99%

“…Artificial UV-B (λ=280-315 nm) radiation may be used as disinfectant preventing toxic algal blooms (or pathogens) on potable water (Alam et al, 2001), unfiltered surface water (Cantwell and Hofmann, 2008), lakes (Sakai et al, 2007b), wastewater treatment (Blatchley et al, 1997;Mamane et al, 2010) and ballast waters, killing potential invasive living organisms (Martí nez et al, 2012). UV-C (λ=200-280 nm) radiation may be a tool to eradicate algae in caves (Borderie et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

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Harmful effects of UV radiation in Algae and aquatic macrophytes – A review

Pessoa

2012

ejfa

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This study provides an overview of the available literature on the ultraviolet-B (UV-B-λ=280-315 nm) and UV-A radiation (λ=315-400 nm) effects on algae (micro and macroalgae) and aquatic macrophytes, like seagrasses and liverworts. It includes studies on prokariotic cyanobacteria, haptophytes, diatoms, dinoflagellates, red algae, brown algae and chlorophytes from freshwater (ponds, lakes) to marine littoral and Open Ocean. It also reports available studies concerning on marine and freshwater plants exposed under UV irradiation. Since the reported relationship between the human activity and the depletion of the protecting layer, the effects of ultraviolet radiation in the biological relevant wavebands on algae and on organisms in general have become an important issue over the past three decades and will be also important in the next few decades. Virtually, all aquatic organisms depend on algae and aquatic plants (submerged or near shallow line) for food, shelter, also as oxygen supplement and CO2 sequestration by photosynthetic procedure. This review reports on harmfull effects caused by ultraviolet wavebands on photosynthetic organisms in their natural habitats.

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Section: Wavebands Of Uv Radiation: Differential Effects On Algaementioning

confidence: 99%

Section: Wavebands Of Uv Radiation: Differential Effects On Algaementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Harmful effects of UV radiation in Algae and aquatic macrophytes – A review

Pessoa

2012

ejfa

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“…It has thus become urgent to apply environmentally friendly treatments. Previous studies (Borderie et al 2011(Borderie et al , 2014 applying UV radiation partially and on only a few biofilms have demonstrated that photosynthetic biofilms may be partially eradicated with, however, a recolonization of the substrate after 16 months. It appears, therefore, that there is still a lack of, and a need for, a thorough study integrating both entire and all biofilms colonizing cave walls, in order to produce reliable information on the efficiency of ultra-violet C (UV-C) treatment in total biofilm eradication without recolonization.…”

Section: Introductionmentioning

confidence: 99%

UV-C as an efficient means to combat biofilm formation in show caves: evidence from the La Glacière Cave (France) and laboratory experiments

Pfendler

Einhorn

Karimi

et al. 2017

Environ Sci Pollut Res

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Ultra-violet C (UV-C) treatment is commonly used in sterilization processes in industry, laboratories, and hospitals, showing its efficacy against microorganisms such as bacteria, algae, or fungi. In this study, we have eradicated for the first time all proliferating biofilms present in a show cave (the La Glacière Cave, Chaux-lès-Passavant, France). Colorimetric measurements of irradiated biofilms were then monitored for 21 months. To understand the importance of exposition of algae to light just after UV radiation, similar tests were carried out in laboratory conditions. Since UV-C can be deleterious for biofilm support, especially parietal painting, we investigated their effects on prehistoric pigment. Results showed complete eradication of cave biofilms with no algae proliferation observed after 21 months. Moreover, quantum yield results showed a decrease directly after UV-C treatment, indicating inhibition of algae photosynthesis. Furthermore, no changes in pigment color nor in chemical and crystalline properties has been demonstrated. The present findings demonstrate that the UV-C method can be considered environmentally friendly and the best alternative to chemicals. This inexpensive and easily implemented method is advantageous for cave owners and managers.

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“…Little is known about the microbiota of Serbian caves (Popović et al, 2015), unlike many other European countries: Spain (Martinez and Asencio, 2010; Roldán and Hernández-Mariné, 2009;Urzì et al, 2010;Busquets et al, 2014), France (Borderie et al, 2011(Borderie et al, , 2014Bastian and Alabouvette, 2009), Italy (Cennamo et al, 2012;Giordano et al, 2000), Poland Mrozińska, 2009, 2011;Czerwik-Marcinkowska, 2013;Ogórek et al, 2013;Pusz et al, 2014), Slovenia (Klemenčić and Vrhovšek, 2005;Mulec et al, , 2012, Greece (Lamprinou et al, 2009(Lamprinou et al, , 2012(Lamprinou et al, , 2014Pantazidou and Roussomoustakaki, 2005), Czech Republic (Poulíčková and Hašler, 2007), Turkey (Selvi and Altuner, 2007), and Russia (Mazina and Maximov, 2011). We investigated cyanobacterial, algal, and fungal diversity in three karst caves in Serbia and related diversity to the environmental factors of light, temperature, and relative humidity and how these factors contribute to colonization by microorganisms.…”

Section: Introductionmentioning

confidence: 99%

Cave biofilms: characterization of phototrophic cyanobacteria and algae and chemotrophic fungi from three caves in Serbia

Popović¹,

Simić²,

Stupar³

et al. 2017

JCKS

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Cyanobacteria, algae (Chlorophyta and Bacillariophyta), and fungi were identified from biofilm samples from three caves in western Serbia: Ribnička, Hadži Prodanova, and Rćanska. Temperature, light intensity, and relative humidity varied from 16.9 8C to 24.9 8C, 61% to 87%, and 215 Lux to 4400 Lux, respectively. In general, the highest number of documented taxa belonged to Cyanobacteria, with chroococcalean taxa prevailing and Gloeocapsa species as the most diverse. A large percentage of observed fungi were Ascomycetes or Zygomycetes, while the only representative of Basidiomycetes was Rhizoctonia s. lat. However, a redundancy analysis revealed that different taxonomic groups were dominant at different localities: cyanobacteria and fungi in Ribnička and Hadži Prodanova, and Chlorophyta and Bacillariophyta in Rćanska. The statistical analysis showed that relative humidity is an important physical parameter influencing the development of various microbial communities in different caves. Cyanobacteria were mostly found in places with lower relative humidity, while Chlorophyta and Bacillariophyta were found in places with higher humidity. The documented physical parameters did not have a significant impact on the distribution of fungi. Measured chlorophyll-a content was highest on horizontal surfaces, where the highest content of organic/inorganic matter were also recorded. The highest water content was observed in biofilm samples from which many cyanobacteria taxa were identified.

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UV–C irradiation as a tool to eradicate algae in caves

Cited by 29 publications

References 15 publications

Harmful effects of UV radiation in Algae and aquatic macrophytes – A review

Harmful effects of UV radiation in Algae and aquatic macrophytes – A review

UV-C as an efficient means to combat biofilm formation in show caves: evidence from the La Glacière Cave (France) and laboratory experiments

Cave biofilms: characterization of phototrophic cyanobacteria and algae and chemotrophic fungi from three caves in Serbia

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