Cargando…

Close Link Between Harmful Cyanobacterial Dominance and Associated Bacterioplankton in a Tropical Eutrophic Reservoir

Cyanobacteria tend to become the dominant phytoplankton component in eutrophic freshwater environments during warmer seasons. However, general observations of cyanobacterial adaptive advantages in these circumstances are insufficient to explain the prevalence of one species over another in a bloom p...

Descripción completa

Detalles Bibliográficos
Autores principales: Guedes, Iame A., Rachid, Caio T. C. C., Rangel, Luciana M., Silva, Lúcia H. S., Bisch, Paulo M., Azevedo, Sandra M. F. O., Pacheco, Ana B. F.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5857610/
https://www.ncbi.nlm.nih.gov/pubmed/29593677
http://dx.doi.org/10.3389/fmicb.2018.00424
_version_ 1783307497912664064
author Guedes, Iame A.
Rachid, Caio T. C. C.
Rangel, Luciana M.
Silva, Lúcia H. S.
Bisch, Paulo M.
Azevedo, Sandra M. F. O.
Pacheco, Ana B. F.
author_facet Guedes, Iame A.
Rachid, Caio T. C. C.
Rangel, Luciana M.
Silva, Lúcia H. S.
Bisch, Paulo M.
Azevedo, Sandra M. F. O.
Pacheco, Ana B. F.
author_sort Guedes, Iame A.
collection PubMed
description Cyanobacteria tend to become the dominant phytoplankton component in eutrophic freshwater environments during warmer seasons. However, general observations of cyanobacterial adaptive advantages in these circumstances are insufficient to explain the prevalence of one species over another in a bloom period, which may be related to particular strategies and interactions with other components of the plankton community. In this study, we present an integrative view of a mixed cyanobacterial bloom occurring during a warm, rainy period in a tropical hydropower reservoir. We used high-throughput sequencing to follow temporal shifts in the dominance of cyanobacterial genera and shifts in the associated heterotrophic bacteria community. The bloom occurred during late spring-summer and included two distinct periods. The first period corresponded to Microcystis aeruginosa complex (MAC) dominance with a contribution from Dolichospermum circinale; this pattern coincided with high water retention time and low transparency. The second period corresponded to Cylindrospermopsis raciborskii and Synechococcus spp. dominance, and the reservoir presented lower water retention time and higher water transparency. The major bacterial phyla were primarily Cyanobacteria and Proteobacteria, followed by Actinobacteria, Bacteroidetes, Verrucomicrobia, and Planctomycetes. Temporal shifts in the dominance of cyanobacterial genera were not only associated with physical features of the water but also with shifts in the associated heterotrophic bacteria. The MAC bloom was associated with a high abundance of Bacteroidetes, particularly Cytophagales. In the second bloom period, Planctomycetes increased in relative abundance, five Planctomycetes OTUs were positively correlated with Synechococcus or C. raciborskii OTUs. Our results suggest specific interactions of the main cyanobacterial genera with certain groups of the heterotrophic bacterial community. Thus, considering biotic interactions may lead to a better understanding of the shifts in cyanobacterial dominance.
format Online
Article
Text
id pubmed-5857610
institution National Center for Biotechnology Information
language English
publishDate 2018
publisher Frontiers Media S.A.
record_format MEDLINE/PubMed
spelling pubmed-58576102018-03-28 Close Link Between Harmful Cyanobacterial Dominance and Associated Bacterioplankton in a Tropical Eutrophic Reservoir Guedes, Iame A. Rachid, Caio T. C. C. Rangel, Luciana M. Silva, Lúcia H. S. Bisch, Paulo M. Azevedo, Sandra M. F. O. Pacheco, Ana B. F. Front Microbiol Microbiology Cyanobacteria tend to become the dominant phytoplankton component in eutrophic freshwater environments during warmer seasons. However, general observations of cyanobacterial adaptive advantages in these circumstances are insufficient to explain the prevalence of one species over another in a bloom period, which may be related to particular strategies and interactions with other components of the plankton community. In this study, we present an integrative view of a mixed cyanobacterial bloom occurring during a warm, rainy period in a tropical hydropower reservoir. We used high-throughput sequencing to follow temporal shifts in the dominance of cyanobacterial genera and shifts in the associated heterotrophic bacteria community. The bloom occurred during late spring-summer and included two distinct periods. The first period corresponded to Microcystis aeruginosa complex (MAC) dominance with a contribution from Dolichospermum circinale; this pattern coincided with high water retention time and low transparency. The second period corresponded to Cylindrospermopsis raciborskii and Synechococcus spp. dominance, and the reservoir presented lower water retention time and higher water transparency. The major bacterial phyla were primarily Cyanobacteria and Proteobacteria, followed by Actinobacteria, Bacteroidetes, Verrucomicrobia, and Planctomycetes. Temporal shifts in the dominance of cyanobacterial genera were not only associated with physical features of the water but also with shifts in the associated heterotrophic bacteria. The MAC bloom was associated with a high abundance of Bacteroidetes, particularly Cytophagales. In the second bloom period, Planctomycetes increased in relative abundance, five Planctomycetes OTUs were positively correlated with Synechococcus or C. raciborskii OTUs. Our results suggest specific interactions of the main cyanobacterial genera with certain groups of the heterotrophic bacterial community. Thus, considering biotic interactions may lead to a better understanding of the shifts in cyanobacterial dominance. Frontiers Media S.A. 2018-03-12 /pmc/articles/PMC5857610/ /pubmed/29593677 http://dx.doi.org/10.3389/fmicb.2018.00424 Text en Copyright © 2018 Guedes, Rachid, Rangel, Silva, Bisch, Azevedo and Pacheco. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Microbiology
Guedes, Iame A.
Rachid, Caio T. C. C.
Rangel, Luciana M.
Silva, Lúcia H. S.
Bisch, Paulo M.
Azevedo, Sandra M. F. O.
Pacheco, Ana B. F.
Close Link Between Harmful Cyanobacterial Dominance and Associated Bacterioplankton in a Tropical Eutrophic Reservoir
title Close Link Between Harmful Cyanobacterial Dominance and Associated Bacterioplankton in a Tropical Eutrophic Reservoir
title_full Close Link Between Harmful Cyanobacterial Dominance and Associated Bacterioplankton in a Tropical Eutrophic Reservoir
title_fullStr Close Link Between Harmful Cyanobacterial Dominance and Associated Bacterioplankton in a Tropical Eutrophic Reservoir
title_full_unstemmed Close Link Between Harmful Cyanobacterial Dominance and Associated Bacterioplankton in a Tropical Eutrophic Reservoir
title_short Close Link Between Harmful Cyanobacterial Dominance and Associated Bacterioplankton in a Tropical Eutrophic Reservoir
title_sort close link between harmful cyanobacterial dominance and associated bacterioplankton in a tropical eutrophic reservoir
topic Microbiology
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5857610/
https://www.ncbi.nlm.nih.gov/pubmed/29593677
http://dx.doi.org/10.3389/fmicb.2018.00424
work_keys_str_mv AT guedesiamea closelinkbetweenharmfulcyanobacterialdominanceandassociatedbacterioplanktoninatropicaleutrophicreservoir
AT rachidcaiotcc closelinkbetweenharmfulcyanobacterialdominanceandassociatedbacterioplanktoninatropicaleutrophicreservoir
AT rangellucianam closelinkbetweenharmfulcyanobacterialdominanceandassociatedbacterioplanktoninatropicaleutrophicreservoir
AT silvaluciahs closelinkbetweenharmfulcyanobacterialdominanceandassociatedbacterioplanktoninatropicaleutrophicreservoir
AT bischpaulom closelinkbetweenharmfulcyanobacterialdominanceandassociatedbacterioplanktoninatropicaleutrophicreservoir
AT azevedosandramfo closelinkbetweenharmfulcyanobacterialdominanceandassociatedbacterioplanktoninatropicaleutrophicreservoir
AT pachecoanabf closelinkbetweenharmfulcyanobacterialdominanceandassociatedbacterioplanktoninatropicaleutrophicreservoir