Detection of sentinel bacteria in mangrove sediments contaminated with heavy metals.
Mar Pollut Bull
; 150: 110701, 2020 Jan.
Article
en En
| MEDLINE
| ID: mdl-31796235
Mangroves in the Northwest Coast of South America are contaminated with heavy metals due to wastewater discharges from industries, affecting the biota from this environment. However, bacteria proliferate in these harsh environmental conditions becoming possible sentinel of these contaminations. In this study, bacterial community composition was analyzed by throughput sequencing of the 16S rRNA gene from polluted and pristine mangrove sediments affected by marked differences in heavy metal concentrations. Core bacteria were dominated by Proteobacteria, Firmicutes, and Bacteroidetes phyla, with strong differences between sites at class and genus levels, correlated with metal levels. Increment of abundance on specific OTUs were associated with either elevated or decreased concentrations of metals and with the sulfur cycle. The abundance of Sulfurovum lithotrophicum, Leptolinea tardivitalis, Desulfococcus multivorans and Aminobacterium colombiense increases when metals rise. On contrary, Bacillus stamsii, Nioella nitrareducens and Clostridiisalibacter paucivorans abundance increases when metal levels are reduced. We propose these OTUs as bacterial sentinels, whose abundance can help monitor the restoration programs of contaminated mangrove sediments in the future.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Contaminantes Químicos del Agua
/
Monitoreo del Ambiente
/
Sedimentos Geológicos
/
Metales Pesados
/
Humedales
Tipo de estudio:
Diagnostic_studies
País/Región como asunto:
America do sul
Idioma:
En
Revista:
Mar Pollut Bull
Año:
2020
Tipo del documento:
Article
País de afiliación:
Ecuador
Pais de publicación:
Reino Unido