Bacterial diversity in relatively pristine and anthropogenically-influenced mangrove ecosystems (Goa, India)
Braz. j. microbiol
;
45(4): 1161-1171, Oct.-Dec. 2014. graf, tab
Article
in English
| LILACS
| ID: lil-741265
ABSTRACT
To appreciate differences in benthic bacterial community composition at the relatively pristine Tuvem and the anthropogenically-influenced Divar mangrove ecosystems in Goa, India, parallel tag sequencing of the V6 region of 16S rDNA was carried out. We hypothesize that availability of extraneously-derived anthropogenic substrates could act as a stimulatant but not a deterrent to promote higher bacterial diversity at Divar. Our observations revealed that the phylum Proteobacteria was dominant at both locations comprising 43-46% of total tags. The Tuvem ecosystem was characterized by an abundance of members belonging to the class Deltaproteobacteria (21%), ~ 2100 phylotypes and 1561 operational taxonomic units (OTUs) sharing > 97% similarity. At Divar, the Gammaproteobacteria were ~ 2x higher (17%) than at Tuvem. A more diverse bacterial community with > 3300 phylotypes and > 2000 OTUs mostly belonging to Gammaproteobacteria and a significantly higher DNT (n = 9, p < 0.001, df = 1) were recorded at Divar. These findings suggest that the quantity and quality of pollutants at Divar are perhaps still at a level to maintain high diversity. Using this technique we could show higher diversity at Divar with the possibility of Gammaproteobacteria contributing to modulating excess nitrate.
Full text:
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Index:
LILACS (Americas)
Main subject:
Genetic Variation
/
Ecosystem
/
Proteobacteria
/
Environmental Microbiology
Country/Region as subject:
Asia
Language:
English
Journal:
Braz. j. microbiol
Journal subject:
Microbiology
Year:
2014
Type:
Article
Affiliation country:
India
Institution/Affiliation country:
National Institute of Oceanography/IN
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