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Light‐dependent niche differentiation in two mixotrophic bacterivores
Mixotrophy usually is considered with respect to the advantages gained and the associated trade‐offs of this form of nutrition, compared to specialized competitors, strict photoautotrophs and heterotrophs. However, we currently have an incomplete understanding of the functional diversity of mixotrop...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
John Wiley & Sons, Inc.
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9541266/ https://www.ncbi.nlm.nih.gov/pubmed/35509225 http://dx.doi.org/10.1111/1758-2229.13071 |
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author | Fischer, Robert Kitzwögerer, Julia Ptacnik, Robert |
author_facet | Fischer, Robert Kitzwögerer, Julia Ptacnik, Robert |
author_sort | Fischer, Robert |
collection | PubMed |
description | Mixotrophy usually is considered with respect to the advantages gained and the associated trade‐offs of this form of nutrition, compared to specialized competitors, strict photoautotrophs and heterotrophs. However, we currently have an incomplete understanding of the functional diversity of mixotrophs and the factors controlling niche differentiation in different mixotrophic species. Here we experimentally studied the light‐dependent niche differentiation in two chrysophyte species. We show that the newly isolated Ochromonas sp. is an obligate phototroph and possibly an obligate mixotroph. In contrast, Poterioochromonas malhamensis is a facultative mixotroph; photosynthesis and heterotrophy in this species represent substitutable routes of resource acquisition. We further hypothesize that the variable plasticity in the considered traits of the here tested species may result in different niche differentiation with regard to a vertical light gradient. Ochromonas sp. should perform better in stable stratified surface water layers, where light is available, but prey abundances might be low. However, P. malhamensis should be able to also successfully grow in deeper water layers, benefiting from higher bacterial production. This study represents a first step towards understanding competition between mixotrophs engaging in different physiological strategies, and consequently their potential co‐occurrence due to niche differentiation. |
format | Online Article Text |
id | pubmed-9541266 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | John Wiley & Sons, Inc. |
record_format | MEDLINE/PubMed |
spelling | pubmed-95412662022-10-14 Light‐dependent niche differentiation in two mixotrophic bacterivores Fischer, Robert Kitzwögerer, Julia Ptacnik, Robert Environ Microbiol Rep Brief Reports Mixotrophy usually is considered with respect to the advantages gained and the associated trade‐offs of this form of nutrition, compared to specialized competitors, strict photoautotrophs and heterotrophs. However, we currently have an incomplete understanding of the functional diversity of mixotrophs and the factors controlling niche differentiation in different mixotrophic species. Here we experimentally studied the light‐dependent niche differentiation in two chrysophyte species. We show that the newly isolated Ochromonas sp. is an obligate phototroph and possibly an obligate mixotroph. In contrast, Poterioochromonas malhamensis is a facultative mixotroph; photosynthesis and heterotrophy in this species represent substitutable routes of resource acquisition. We further hypothesize that the variable plasticity in the considered traits of the here tested species may result in different niche differentiation with regard to a vertical light gradient. Ochromonas sp. should perform better in stable stratified surface water layers, where light is available, but prey abundances might be low. However, P. malhamensis should be able to also successfully grow in deeper water layers, benefiting from higher bacterial production. This study represents a first step towards understanding competition between mixotrophs engaging in different physiological strategies, and consequently their potential co‐occurrence due to niche differentiation. John Wiley & Sons, Inc. 2022-05-04 2022-08 /pmc/articles/PMC9541266/ /pubmed/35509225 http://dx.doi.org/10.1111/1758-2229.13071 Text en © 2022 The Authors. Environmental Microbiology Reports published by Society for Applied Microbiology and John Wiley & Sons Ltd. https://creativecommons.org/licenses/by/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Brief Reports Fischer, Robert Kitzwögerer, Julia Ptacnik, Robert Light‐dependent niche differentiation in two mixotrophic bacterivores |
title | Light‐dependent niche differentiation in two mixotrophic bacterivores |
title_full | Light‐dependent niche differentiation in two mixotrophic bacterivores |
title_fullStr | Light‐dependent niche differentiation in two mixotrophic bacterivores |
title_full_unstemmed | Light‐dependent niche differentiation in two mixotrophic bacterivores |
title_short | Light‐dependent niche differentiation in two mixotrophic bacterivores |
title_sort | light‐dependent niche differentiation in two mixotrophic bacterivores |
topic | Brief Reports |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9541266/ https://www.ncbi.nlm.nih.gov/pubmed/35509225 http://dx.doi.org/10.1111/1758-2229.13071 |
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