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Title

LAS degradability by marine biofilms derived from seawater in Spain and Sweden

AuthorsMauffret, A.; Gillan, David C.; Erikssond, K.M.; Rottiers, André; Blasco, Julián ; Temara, A.
KeywordsMarine
Biodegradation
LAS
Acclimation
Temperature
Biofilm
Issue DateJul-2011
PublisherElsevier
CitationEcotoxicology and Environmental Safety 74(5): 1250-1256 (2011)
AbstractMarine biofilms were established on glass beads with or without deliberate pre-exposure to LAS (20μg/L) in Spain (Cadiz) and Sweden (Kristineberg). The ability of each community to mineralize LAS (100μg/L) was then assessed in biometers at four experimental temperatures (between 6 and 21°C). Genetic diversity and biomass of the biofilms were assessed by genetic fingerprinting (DGGE) and direct bacterial counts. With biofilms from Sweden, where LAS was not detected in seawater (n=3), deliberate pre-exposure to LAS resulted in lower genetic diversity and higher mineralization rate constant; however, with biofilms from Spain, where 6.4±3.9μgLAS/L (n=3) was measured during the colonization, pre-exposure did not affect the bacterial community. Bacterial acclimation therefore appeared to have been induced at environmental concentrations <6μgLAS/L. Environmental pre-exposure was not a pre-requisite for featuring the full consortia of LAS degraders in the biometers. The mineralization rate was described using an Arrhenius equation at experimental temperatures within the typical annual range; however, they departed from this model below this range. © 2011 Elsevier Inc.
URIhttp://hdl.handle.net/10261/102717
DOI10.1016/j.ecoenv.2011.02.016
Identifiersdoi: 10.1016/j.ecoenv.2011.02.016
issn: 0147-6513
Appears in Collections:(ICMAN) Artículos
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