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Open AccessArticle

The Impact of a Fish Cannery Wastewater Discharge on the Bacterial Community Structure and Sanitary Conditions of Marine Coastal Sediments

1
Department of Natural and Health Sciences, Juraj Dobrila University of Pula, Pula 52100, Croatia
2
Department of Geology, Faculty of Science, University of Zagreb, Zagreb 10000, Croatia
3
Center for Marine Research, Ruđer Bošković Institute, Rovinj 52210, Croatia
*
Author to whom correspondence should be addressed.
Water 2019, 11(12), 2566; https://doi.org/10.3390/w11122566
Received: 7 November 2019 / Revised: 2 December 2019 / Accepted: 3 December 2019 / Published: 5 December 2019
(This article belongs to the Special Issue Microbial Communities in Water Environments: Dynamics and Interaction)
The effects of fish cannery discharge (FCD) on bacteria in marine coastal sediments were investigated. Redox potentials were measured, and granulometry was determined by wet ASTM sieving, and with the Sedigraph method. Prokaryotic abundance (PA) was determined by epifluorescence microscopy (DAPI staining), and faecal indicator bacteria (FIB) enumerated with the multiple test tube and most probable number method. Total lipids were determined gravimetrically, and sterols analysed by GC/MSD. Bacterial community composition was determined after total DNA isolation, Illumina MiSeq amplification, and SILVAngs processing pipeline. The FCD was rich in lipids, heterotrophic prokaryotes and FIB. The bacterial community of the FCD was dominated by Firmicutes and Gammaproteobacteria and many potentially pathogenic bacteria. Highly porosusgravelly sands clogged with fish remains transitioned to less permeable sandy muds away from the FCD. All sediments were anoxic with extremely negative potentials around the outfall. High surface PA and FIB spread 300 m from the outfall. Gammaproteobacteria and Deltaproteobacteria appeared in all sediments. Sulfurovum and Anaerolineaceae characterized the most polluted locations where gammaproteobacterial Woeseiaceae/JTB255 marine benthic group declined. Gammaproteobacteria and Bacteroidetes characterized surface sediments, while Chloroflexi and Deltaproteobacteria prevailed in deeper layers. The FCD enriched sediments in lipids and allochthonous bacteria degrading sanitary quality, lowering the permeability, redox potential, and bacterial diversity. View Full-Text
Keywords: coastal sediments; fish cannery discharge; faecal indicator bacteria; bacterial community structure; next-generation sequencing; potentially pathogenic bacteria coastal sediments; fish cannery discharge; faecal indicator bacteria; bacterial community structure; next-generation sequencing; potentially pathogenic bacteria
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MDPI and ACS Style

Paliaga, P.; Felja, I.; Budiša, A.; Ivančić, I. The Impact of a Fish Cannery Wastewater Discharge on the Bacterial Community Structure and Sanitary Conditions of Marine Coastal Sediments. Water 2019, 11, 2566.

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