BECAS
FIGUEROA GALVIS Ingrid Paola
congresos y reuniones científicas
Título:
The effect of sewage discharge on the microbial community of mangrove ecosystems
Autor/es:
FIGUEROA, INGRID; MUÑOZ-GARCÍA, ANDREA; TORRES, GUILLERMO G.; POLANÍA, JAIME; VANEGAS, JAVIER
Lugar:
Medellín
Reunión:
Conferencia; International Conference on Marine Science: towards a sustainable ocean; 2018
Institución organizadora:
CEMarin, DAAD, Universidad Nacional de Colombia sede Medellín.
Resumen:
Diversity and microbial activity are important for the stability and maintenance ofmangroves. The anthropogenic pressure caused by the discharge of sewage andoil spills could be detected by changes in bacterial groups. This research shows arobust description of the microbiota from two mangroves in La Guajira, one pristine(conserved) and another contaminated by urban sewage discharge (altered). We assessed the structure of the bacterial community by sequencing 16S rRNA gene onthe Illumina system. Raw sequences were filtered and annotated using Mothur software. Αlpha and Beta diversities were calculated to identify the diversity within andbetween the samples respectively. The soil samples were also subjected to physicochemical analyzes. 2,767 OTUs with a similarity of 97% were identified. 14 phyla,15 classes, 29 orders, 55 families and 106 genera were enriched in some of the twomangroves. The genera Marinobacterium, Marinobacter, Clostridium and Alcanivoraxshowed significant abundances in the altered mangrove and have been postulatedas indicators of contamination in mangroves. On the other hand, some bacterialgenera involved in the nitrogen and sulfur cycle were significantly enriched in thealtered mangrove. Phosphorus was the most important physicochemical parameteramong mangroves. Our results clearly show changes in the structure and proportion of the bacteria community between mangroves. In addition, some bacterialgroups are postulated and confirmed as bioindicators of urban wastewater pollutionin mangroves. This study will permit the identification of microbial markers as astrategy for conservation and monitoring of pollution.