Changes in bacterial community structure associated with coastal copper enrichment.
Environ Toxicol Chem
; 27(11): 2239-45, 2008 Nov.
Article
em En
| MEDLINE
| ID: mdl-18522451
ABSTRACT
Marine bacterial communities isolated from the water column, sediment, the rock surface, and the green seaweed Ulva compressa were studied in an intertidal ecosystem. The study area included a coastal zone chronically affected by copper mine waste disposals. Bacterial community composition was analyzed by terminal restriction fragment length polymorphism (T-RFLP) of 16S rRNA genes, and multivariate analyses of T-RFLP data sets were used for comparisons. Results showed that diversity and richness indexes were not able to detect differences among compartments. However, comparisons within the same compartment clearly showed that copper enrichment was associated with changes in the composition of the bacterial communities and revealed that the magnitude of the effect depends on the compartment being considered. In this context, communities from sediments appeared as the most affected by copper enrichment. The present study also demonstrated that intertidal bacterial communities were dominated by Gammaproteobacteria, Firmicutes, and Actinobacteria and the changes in these communities were mainly due to changes in their relative abundances.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Bactérias
/
Ecossistema
/
Cobre
Tipo de estudo:
Risk_factors_studies
Idioma:
En
Revista:
Environ Toxicol Chem
Ano de publicação:
2008
Tipo de documento:
Article