RT Journal Article
T1 Salinity is the major driver of the global eukaryotic community structure in fish-canning wastewater treatment plants
A1 Correa Galeote, David
A1 Roibás Rozas, Alba
A1 Mosquera Corral, Anuska
A1 Juárez Jiménez, Belén
A1 González López, Jesús
A1 Rodelas González, Belén
K1 Eukarya community
K1 Eukaryotic diversity
K1 NaCl concentration
K1 Fish-canning WWTP
K1 Illumina sequencing
AB Fish-canning wastewater is characterized frequently by a high content of salt (NaCl), making its treatment particularly difficult; however, the knowledge of the effect of NaCl on eukaryotic communities is very limited. In the present study, the global diversity of eukaryotes in activated sludges (AS) from 4 different wastewater treatment plants (WWTPs) treating fish-canning effluents varying in salinity (0.47, 1.36, 1.72 and 12.76 g NaCl/L) was determined by sequencing partial 18S rRNA genes using Illumina MiSeq. A greater diversity than previously reported was observed in the AS community, which comprised 37 and 330 phylum-like and genera-like groups, respectively. In this sense, the more abundant genus-like groups (average relative abundance (RA) > 5%) were Adineta (6.80%), Lecane (16.80%), Dictyostelium (7.36%), Unclassified_Fungi7 (6.94%), Procryptobia (5.13) and Oocystis (5.07%). The eukaryotic communities shared a common core of 25 phylum-like clades (95% of total sequences); therefore, a narrow selection of the eukaryotic populations was found, despite the differences in the abiotic characteristics of fish-canning effluents and reactor operational conditions inflicted. The differences in NaCl concentration were the main factor that influenced the structure of the eukaryotic community, modulating the RAs of the different phylum-like clades of the common core. Higher levels of salt increased the RAs of Ascomycota, Chlorophyta, Choanoflagellata, Cryptophyta, Mollusca, Nematoda, Other Protists and Unclassified Fungi. Among the different eukaryotic genera here found, the RA of Oocystis (Chlorophyta) was intimately correlated to increasing NaCl concentrations and it is proposed as a bioindicator of the global eukaryotic community of fish-canning WWTPs.
PB Elsevier
SN 0301-4797
YR 2021
FD 2021
LK http://hdl.handle.net/10347/26296
UL http://hdl.handle.net/10347/26296
LA eng
NO Journal of Environmental Management, 290 (2021), 112623
NO This study was supported by TREASURE project [CTQ2017-83225-C2-1-R and CTQ2017-83225-C2-2-R projects] from the Spanish Ministry of Science and Innovation and Ministry of Universities
DS Minerva
RD 28 abr 2026