The dynamics of biofilm bacterial communities is driven by flow wax and wane in a temporary stream
dc.contributor.author
dc.date.accessioned
2014-11-06T08:00:16Z
dc.date.available
2014-11-06T08:00:16Z
dc.date.issued
2014
dc.identifier.issn
0024-3590
dc.identifier.uri
dc.description.abstract
Biofilm communities are exposed to long periods of desiccation in temporary streams. We investigated how water flow intermittency affected the bacterial community structure colonizing three different streambed compartments in a Mediterranean stream. Massive parallel sequencing revealed different bacterial communities in biofilms from sand sediments and cobbles. Bacterial communities were similar (62% of shared operational taxonomic units) in the epipsammic and hyporheic biofilms, and more diverse than those in the epilithic biofilms. The non-flow phase caused a decrease of bacterial diversity in the biofilms, when communities included only bacterial taxa assumed to be adapted to water stress. The most sensitive bacterial communities to flow intermittency were in the epilithic, where the exposure to physical stress was the highest. In sand sediments a wide group of bacterial taxa was tolerant to desiccation. During non-flow the proliferation of opportunistic taxa in the superficial compartments evidenced the biological link with the terrestrial environment. Bacterial communities better tolerate rewetting than desiccation, since a major number of taxa tolerant to rewetting occurred in all biofilms. Overall, bacterial communities in sandy compartments showed higher resistance to flow intermittency than those in epilithic biofilms
dc.format.mimetype
application/pdf
dc.language.iso
eng
dc.publisher
Association for the Sciences of Limnology and Oceanography
dc.relation.isformatof
Reproducció digital del document publicat a: http://dx.doi.org/10.4319/lo.2014.59.6.2057
dc.relation.ispartof
© Limnology and Oceanography, 2014, vol. 59, núm. 6, p. 2057-2067
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Articles publicats (D-CCAA)
dc.rights
Tots els drets reservats
dc.subject
dc.title
The dynamics of biofilm bacterial communities is driven by flow wax and wane in a temporary stream
dc.type
info:eu-repo/semantics/article
dc.rights.accessRights
info:eu-repo/semantics/openAccess
dc.embargo.terms
Cap
dc.type.version
info:eu-repo/semantics/publishedVersion
dc.identifier.doi
dc.identifier.idgrec
022976
dc.identifier.eissn
1939-5590