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Oxic-anoxic regime shifts mediated by feedbacks between biogeochemical processes and microbial community dynamics
Although regime shifts are known from various ecosystems, the involvement of microbial communities is poorly understood. Here we show that gradual environmental changes induced by, for example, eutrophication or global warming can induce major oxic-anoxic regime shifts. We first investigate a mathem...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5630580/ https://www.ncbi.nlm.nih.gov/pubmed/28986518 http://dx.doi.org/10.1038/s41467-017-00912-x |
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author | Bush, Timothy Diao, Muhe Allen, Rosalind J. Sinnige, Ruben Muyzer, Gerard Huisman, Jef |
author_facet | Bush, Timothy Diao, Muhe Allen, Rosalind J. Sinnige, Ruben Muyzer, Gerard Huisman, Jef |
author_sort | Bush, Timothy |
collection | PubMed |
description | Although regime shifts are known from various ecosystems, the involvement of microbial communities is poorly understood. Here we show that gradual environmental changes induced by, for example, eutrophication or global warming can induce major oxic-anoxic regime shifts. We first investigate a mathematical model describing interactions between microbial communities and biogeochemical oxidation-reduction reactions. In response to gradual changes in oxygen influx, this model abruptly transitions between an oxic state dominated by cyanobacteria and an anoxic state with sulfate-reducing bacteria and phototrophic sulfur bacteria. The model predictions are consistent with observations from a seasonally stratified lake, which shows hysteresis in the transition between oxic and anoxic states with similar changes in microbial community composition. Our results suggest that hysteresis loops and tipping points are a common feature of oxic-anoxic transitions, causing rapid drops in oxygen levels that are not easily reversed, at scales ranging from small ponds to global oceanic anoxic events. |
format | Online Article Text |
id | pubmed-5630580 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-56305802017-10-10 Oxic-anoxic regime shifts mediated by feedbacks between biogeochemical processes and microbial community dynamics Bush, Timothy Diao, Muhe Allen, Rosalind J. Sinnige, Ruben Muyzer, Gerard Huisman, Jef Nat Commun Article Although regime shifts are known from various ecosystems, the involvement of microbial communities is poorly understood. Here we show that gradual environmental changes induced by, for example, eutrophication or global warming can induce major oxic-anoxic regime shifts. We first investigate a mathematical model describing interactions between microbial communities and biogeochemical oxidation-reduction reactions. In response to gradual changes in oxygen influx, this model abruptly transitions between an oxic state dominated by cyanobacteria and an anoxic state with sulfate-reducing bacteria and phototrophic sulfur bacteria. The model predictions are consistent with observations from a seasonally stratified lake, which shows hysteresis in the transition between oxic and anoxic states with similar changes in microbial community composition. Our results suggest that hysteresis loops and tipping points are a common feature of oxic-anoxic transitions, causing rapid drops in oxygen levels that are not easily reversed, at scales ranging from small ponds to global oceanic anoxic events. Nature Publishing Group UK 2017-10-06 /pmc/articles/PMC5630580/ /pubmed/28986518 http://dx.doi.org/10.1038/s41467-017-00912-x Text en © The Author(s) 2017 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Bush, Timothy Diao, Muhe Allen, Rosalind J. Sinnige, Ruben Muyzer, Gerard Huisman, Jef Oxic-anoxic regime shifts mediated by feedbacks between biogeochemical processes and microbial community dynamics |
title | Oxic-anoxic regime shifts mediated by feedbacks between biogeochemical processes and microbial community dynamics |
title_full | Oxic-anoxic regime shifts mediated by feedbacks between biogeochemical processes and microbial community dynamics |
title_fullStr | Oxic-anoxic regime shifts mediated by feedbacks between biogeochemical processes and microbial community dynamics |
title_full_unstemmed | Oxic-anoxic regime shifts mediated by feedbacks between biogeochemical processes and microbial community dynamics |
title_short | Oxic-anoxic regime shifts mediated by feedbacks between biogeochemical processes and microbial community dynamics |
title_sort | oxic-anoxic regime shifts mediated by feedbacks between biogeochemical processes and microbial community dynamics |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5630580/ https://www.ncbi.nlm.nih.gov/pubmed/28986518 http://dx.doi.org/10.1038/s41467-017-00912-x |
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