Cargando…
Algicidal bacteria trigger contrasting responses in model diatom communities of different composition
Algicidal bacteria are important players regulating the dynamic changes of plankton assemblages. Most studies on these bacteria have focused on the effect on single algal species in simple incubation experiments. Considering the complexity of species assemblages in the natural plankton, such incubat...
Autores principales: | , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
John Wiley and Sons Inc.
2019
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6692526/ https://www.ncbi.nlm.nih.gov/pubmed/30809963 http://dx.doi.org/10.1002/mbo3.818 |
_version_ | 1783443573118599168 |
---|---|
author | Bigalke, Arite Pohnert, Georg |
author_facet | Bigalke, Arite Pohnert, Georg |
author_sort | Bigalke, Arite |
collection | PubMed |
description | Algicidal bacteria are important players regulating the dynamic changes of plankton assemblages. Most studies on these bacteria have focused on the effect on single algal species in simple incubation experiments. Considering the complexity of species assemblages in the natural plankton, such incubations represent an oversimplification and do not allow making further reaching conclusions on ecological interactions. Here, we describe a series of co‐incubation experiments with different level of complexity to elucidate the effect of the algicidal bacterium Kordia algicida on mixed cultures of a resistant and a susceptible diatom. The growth of the resistant diatom Chaetoceros didymus is nearly unaffected by K. algicida in monoculture, while cells of the susceptible diatom Skeletonema costatum are lysed within few hours. Growth of C. didymus is inhibited if mixed cultures of the two diatoms are infected with the bacterium. Incubations with filtrates of the infected cultures show that the effects are chemically mediated. In non‐contact co‐culturing we show that low concentrations of the lysed algae support the growth of C. didymus, while higher concentrations trigger population decline. Complex cascading effects of algicidal bacteria have thus to be taken into account if their ecological role is concerned. |
format | Online Article Text |
id | pubmed-6692526 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | John Wiley and Sons Inc. |
record_format | MEDLINE/PubMed |
spelling | pubmed-66925262019-08-16 Algicidal bacteria trigger contrasting responses in model diatom communities of different composition Bigalke, Arite Pohnert, Georg Microbiologyopen Original Articles Algicidal bacteria are important players regulating the dynamic changes of plankton assemblages. Most studies on these bacteria have focused on the effect on single algal species in simple incubation experiments. Considering the complexity of species assemblages in the natural plankton, such incubations represent an oversimplification and do not allow making further reaching conclusions on ecological interactions. Here, we describe a series of co‐incubation experiments with different level of complexity to elucidate the effect of the algicidal bacterium Kordia algicida on mixed cultures of a resistant and a susceptible diatom. The growth of the resistant diatom Chaetoceros didymus is nearly unaffected by K. algicida in monoculture, while cells of the susceptible diatom Skeletonema costatum are lysed within few hours. Growth of C. didymus is inhibited if mixed cultures of the two diatoms are infected with the bacterium. Incubations with filtrates of the infected cultures show that the effects are chemically mediated. In non‐contact co‐culturing we show that low concentrations of the lysed algae support the growth of C. didymus, while higher concentrations trigger population decline. Complex cascading effects of algicidal bacteria have thus to be taken into account if their ecological role is concerned. John Wiley and Sons Inc. 2019-02-27 /pmc/articles/PMC6692526/ /pubmed/30809963 http://dx.doi.org/10.1002/mbo3.818 Text en © 2019 The Authors. MicrobiologyOpen published by John Wiley & Sons Ltd. This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Original Articles Bigalke, Arite Pohnert, Georg Algicidal bacteria trigger contrasting responses in model diatom communities of different composition |
title | Algicidal bacteria trigger contrasting responses in model diatom communities of different composition |
title_full | Algicidal bacteria trigger contrasting responses in model diatom communities of different composition |
title_fullStr | Algicidal bacteria trigger contrasting responses in model diatom communities of different composition |
title_full_unstemmed | Algicidal bacteria trigger contrasting responses in model diatom communities of different composition |
title_short | Algicidal bacteria trigger contrasting responses in model diatom communities of different composition |
title_sort | algicidal bacteria trigger contrasting responses in model diatom communities of different composition |
topic | Original Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6692526/ https://www.ncbi.nlm.nih.gov/pubmed/30809963 http://dx.doi.org/10.1002/mbo3.818 |
work_keys_str_mv | AT bigalkearite algicidalbacteriatriggercontrastingresponsesinmodeldiatomcommunitiesofdifferentcomposition AT pohnertgeorg algicidalbacteriatriggercontrastingresponsesinmodeldiatomcommunitiesofdifferentcomposition |