Factors driving epilithic algal colonization in show caves and new insights into combating biofilm development with UV-C treatments - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Science of the Total Environment Année : 2014

Factors driving epilithic algal colonization in show caves and new insights into combating biofilm development with UV-C treatments

Résumé

The proliferation of epilithic algae that form biofilms in subterranean environments, such as show caves, is a major problem for conservators. In an effort to reduce the use of chemical cleansers when addressing this problem, we proposed investigating the effects of UV-C on combating algal biofilm expansion in a cave located in northeastern France (Moidons Cave). First, the biofilms and cavity were studied in terms of their algal growth-influencing factors to understand the dynamics of colonization in these very harsh environments. Next, colorimetric measurements were used both to diagnose the initial colonization state and monitor the UV-C-treated biofilms for several months after irradiation. The results indicated that passive dispersal vectors of the viable spores and cells were the primary factors involved in the cave's algae repartition. The illumination time during visits appeared to be responsible for greater colonization in some parts of the cave. We also showed that colorimetric measurements could be used for the detection of both thin and thick biofilms, regardless of the type of colonized surface. Finally, our results showed that UV-C treatment led to bleaching of the treated biofilm due to chlorophyll degradation even one year after UV-C treatment. However, a re-colonization phenomenon was colorimetrically and visually detected 16 months later, suggesting that the colonization dynamics had not been fully halted.
Fichier non déposé

Dates et versions

halsde-00982537 , version 1 (24-04-2014)

Identifiants

Citer

Fabien Borderie, Nicolas Tête, Didier Cailhol, Laurence Alaoui-Sehmer, Boustba Faisl, et al.. Factors driving epilithic algal colonization in show caves and new insights into combating biofilm development with UV-C treatments. Science of the Total Environment, 2014, 484, pp.43-52. ⟨10.1016/j.scitotenv.2014.03.043⟩. ⟨halsde-00982537⟩
154 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More