Microbiological water quality of the environmental preservation area: Fazenda Guajuviras - Canoas (RS)
DOI:
https://doi.org/10.6008/CBPC2318-2881.2018.002.0002Keywords:
Plated, Heterotrophic bacteria, Coliforms, 16S rRNAAbstract
Wetlands comprise several ecosystems, including wetlands, which are strategic places for conservation due to their high biological diversity and productivity resulting from the relationships established between water, soil, vegetation and fauna. Fazenda Guajuviras Environmental Protection Area (APA) is located in the municipality of Canoas (RS) and comprises about 560ha. The objective of this study was to analyze the contamination levels by heterotrophic bacteria and coliform group, to trace the biochemical profile and to identify some bacterial isolates present in two APA Guajuviras baths. To this end, the collections were performed in March 2015, and each bath was divided into four quadrants, from which 250mL of water samples were collected. Wetland 2 presented the highest levels for both total and thermotolerant coliforms. In the quantification of heterotrophic bacteria, the highest levels found were in the northern quadrant of plated 1 and 2. Eight bacterial strains were isolated from these plated. From the bacterial strains obtained from these baths, it was possible to identify, by sequencing the 16S rRNA gene, eight isolates of two genera: Pseudomonas sp. and Serratia sp., and three other species: Bacillus subtilis, Lactococcus garvieae and Pseudomonas fluorescens.
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