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Phytoplankton community structuring in the absence of resource-based competitive exclusion
Under most natural marine conditions, phytoplankton cells suspended in the water column are too distantly spaced for direct competition for resources (i.e., overlapping cell boundary layers) to be a routine occurrence. Accordingly, resource-based competitive exclusion should be rare. In contrast, co...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9481051/ https://www.ncbi.nlm.nih.gov/pubmed/36112595 http://dx.doi.org/10.1371/journal.pone.0274183 |
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author | Behrenfeld, Michael J. Bisson, Kelsey M. Boss, Emmanuel Gaube, Peter Karp-Boss, Lee |
author_facet | Behrenfeld, Michael J. Bisson, Kelsey M. Boss, Emmanuel Gaube, Peter Karp-Boss, Lee |
author_sort | Behrenfeld, Michael J. |
collection | PubMed |
description | Under most natural marine conditions, phytoplankton cells suspended in the water column are too distantly spaced for direct competition for resources (i.e., overlapping cell boundary layers) to be a routine occurrence. Accordingly, resource-based competitive exclusion should be rare. In contrast, contemporary ecosystem models typically predict an exclusion of larger phytoplankton size classes under low-nutrient conditions, an outcome interpreted as reflecting the competitive advantage of small cells having much higher nutrient ‘affinities’ than larger cells. Here, we develop mechanistically-focused expressions for steady-state, nutrient-limited phytoplankton growth that are consistent with the discrete, distantly-spaced cells of natural populations. These expressions, when encompassed in a phytoplankton-zooplankton model, yield sustained diversity across all size classes over the full range in nutrient concentrations observed in the ocean. In other words, our model does not exhibit resource-based competitive exclusion between size classes previously associated with size-dependent differences in nutrient ‘affinities’. |
format | Online Article Text |
id | pubmed-9481051 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-94810512022-09-17 Phytoplankton community structuring in the absence of resource-based competitive exclusion Behrenfeld, Michael J. Bisson, Kelsey M. Boss, Emmanuel Gaube, Peter Karp-Boss, Lee PLoS One Research Article Under most natural marine conditions, phytoplankton cells suspended in the water column are too distantly spaced for direct competition for resources (i.e., overlapping cell boundary layers) to be a routine occurrence. Accordingly, resource-based competitive exclusion should be rare. In contrast, contemporary ecosystem models typically predict an exclusion of larger phytoplankton size classes under low-nutrient conditions, an outcome interpreted as reflecting the competitive advantage of small cells having much higher nutrient ‘affinities’ than larger cells. Here, we develop mechanistically-focused expressions for steady-state, nutrient-limited phytoplankton growth that are consistent with the discrete, distantly-spaced cells of natural populations. These expressions, when encompassed in a phytoplankton-zooplankton model, yield sustained diversity across all size classes over the full range in nutrient concentrations observed in the ocean. In other words, our model does not exhibit resource-based competitive exclusion between size classes previously associated with size-dependent differences in nutrient ‘affinities’. Public Library of Science 2022-09-16 /pmc/articles/PMC9481051/ /pubmed/36112595 http://dx.doi.org/10.1371/journal.pone.0274183 Text en © 2022 Behrenfeld et al https://creativecommons.org/licenses/by/4.0/This is an open access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
spellingShingle | Research Article Behrenfeld, Michael J. Bisson, Kelsey M. Boss, Emmanuel Gaube, Peter Karp-Boss, Lee Phytoplankton community structuring in the absence of resource-based competitive exclusion |
title | Phytoplankton community structuring in the absence of resource-based competitive exclusion |
title_full | Phytoplankton community structuring in the absence of resource-based competitive exclusion |
title_fullStr | Phytoplankton community structuring in the absence of resource-based competitive exclusion |
title_full_unstemmed | Phytoplankton community structuring in the absence of resource-based competitive exclusion |
title_short | Phytoplankton community structuring in the absence of resource-based competitive exclusion |
title_sort | phytoplankton community structuring in the absence of resource-based competitive exclusion |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9481051/ https://www.ncbi.nlm.nih.gov/pubmed/36112595 http://dx.doi.org/10.1371/journal.pone.0274183 |
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