Linked Life Data

19275956

Source:http://linkedlifedata.com/resource/pubmed/id/19275956

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
10
pubmed:dateCreated
2009-3-30
pubmed:abstractText
The broad spectrum antimicrobials triclosan (TCS) and triclocarban (TCC) are commonly detected in the environment. However, there is very limited understanding of the aquatic ecological implications of these agents. During this study, river biofilms were cultivated using 10 microg l(-1) of TCS or TCC and the equivalent in nutrients (carbon, nitrogen) over a developmental period of 8 weeks. Confocal laser microscopy showed that the biofilm communities developing under the influence of TCS and TCC had community architecture and composition different from either control or nutrient exposed communities. Microscale analyses of biofilm community structure indicated a significant reduction in algal biomass (p<0.05) as a result of exposure to either TCS or TCC. Thymidine incorporation did not detect significant differences between control and treated communities. The use of carbon utilization assays based on growth indicated that, in general, TCS and TCC suppressed utilization. The community was altered from one dominated by autotrophic processes to one dominated by heterotrophic processes. Both TCS and TCC treatments resulted in significant (p<0.05) alterations in the composition of the EPS matrix of the communities, suggesting significant changes in community composition. Denaturing gradient gel electrophoresis and PCA-ANOSIM analyses indicated a significant change occurred in the bacterial community as a consequence of TCS treatments. Enumeration of micrometazoa and protozoa revealed an increase in micrometazoan numbers over control values, whereas no clear impact on protozoa was detected in any treatment. This study indicated significant effects of 10 microg l(-1) TCS and TCC on microbial community composition, algal biomass, architecture and activity.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
May
pubmed:issn
0048-9697
pubmed:author
pubmed:issnType
Print
pubmed:day
1
pubmed:volume
407
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
3307-16
pubmed:dateRevised
2010-11-18
pubmed:meshHeading
pubmed:year
2009
pubmed:articleTitle
Comparative microscale analysis of the effects of triclosan and triclocarban on the structure and function of river biofilm communities.
pubmed:affiliation
Environment Canada, Saskatoon, SK, Canada. John.Lawrence@ec.gc.ca
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't