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Limited influence of primary treated sewage waters on bacterial abundance, production and community composition in coastal seawaters

Paliaga, Paolo; Korlević, Marino; Ivančić, Ingrid; Najdek Dragić, Mirjana (2017) Limited influence of primary treated sewage waters on bacterial abundance, production and community composition in coastal seawaters. Marine Environmental Research, 131 . pp. 215-226. ISSN 0141-1136

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Abstract

The response of bacteria in terms of abundance, production and community structure to changes induced by the discharge of primary treated sewage waters was investigated combining microbiological, chemical and molecular tools. The primary treatment did not affect substantially the bacterial community structure in wastewaters and did not reduce the concentrations of fecal indicators. The spatial distribution of the sewage plume was governed by vertical stratification and currents. Bacterial abundance and production in the sea receiving waste waters depended predominantly on environmental conditions. In the waters with the highest concentration of fecal pollution indicators the bacterial community was characterized by allochthonous bacteria belonging to Epsilonproteobacteria, Firmicutes, Gammaproteobacteria and Bacteroidetes. The latter two taxa were also present in unpolluted waters but had a different structure, typical for oligotrophic environments. Although the impact of primary treated sewage waters was limited, a sanitary risk persisted due to the relevant presence of potentially pathogenic bacteria.

Item Type: Article
Uncontrolled Keywords: Sewage waters; Coprostanol; Fecal indicator bacteria; Bacterial community structure; Next-generation sequencing; Potentially pathogenic bacteria
Subjects: NATURAL SCIENCES
NATURAL SCIENCES > Interdisciplinary Natural Sciences
NATURAL SCIENCES > Interdisciplinary Natural Sciences > Marine Science
Divisions: Center for Marine Research
Depositing User: Mirjana Najdek Dragić
Date Deposited: 03 Dec 2018 09:42
Last Modified: 03 Dec 2018 09:42
URI: http://fulir.irb.hr/id/eprint/4365
DOI: 10.1016/j.marenvres.2017.09012

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