English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/57676
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Title

Photosynthetic performance of phototrophic biofilms in extreme acidic environments

AuthorsSouza-Egipsy, Virginia ; Altamirano, María; Amils, Ricardo ; Aguilera, Ángeles
KeywordsRío Tinto
Zygnemopsis
Ecosystems
Photosynthesis
Issue Date2011
PublisherSociety for Applied Microbiology
CitationEnvironmental Microbiology 13 (8): 2351-2358 (2011)
AbstractPhotosynthesis versus irradiance curves and their associated photosynthetic parameters from different phototrophic biofilms isolated from an extreme acidic environment (Río Tinto, SW, Spain) were studied in order to relate them to their species composition and the physicochemical characteristics of their respective sampling locations. The results indicated that the biofilms are low light acclimated showing a photoinhibition model; only floating communities of filamentous algae showed a light saturation model. Thus, all the biofilms analysed showed photoinhibition over 60 µmol photon m−2 s−1 except in the case of Zygnemopsis sp. sample, which showed a light-saturated photosynthesis model under irradiations higher that 200 µmol photon m−2 s−1. The highest values of compensation light intensity (Ic) were showed also by Zygnemosis sp. biofilm (c. 40 µmol photon m−2 s−1), followed by Euglena mutabilis and Chlorella sp. samples (c. 20 µmol photon m−2 s−1). The diatom sample showed the lowest Ic values (c. 5 µmol photon m−2 s−1). As far as we know this is the first attempt to determine the photosynthetic activity of low pH and heavy metal tolerant phototrophic biofilms, which may give light in the understanding of the ecological importance of these biofilms for the maintenance of the primary production of these extreme and unique ecosystems.
Publisher version (URL)http://dx.doi.org/10.1111/j.1462-2920.2011.02506.x
URIhttp://hdl.handle.net/10261/57676
DOI10.1111/j.1462-2920.2011.02506.x
ISSN1462-2912
E-ISSN1462-2920
Appears in Collections:(CBM) Artículos
Files in This Item:
File Description SizeFormat 
accesoRestringido.pdf15,38 kBAdobe PDFThumbnail
View/Open
Show full item record
Review this work
 

Related articles:


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.