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Phytoplankton settling quality has a subtle but significant effect on sediment microeukaryotic and bacterial communities
In coastal aphotic sediments, organic matter (OM) input from phytoplankton is the primary food resource for benthic organisms. Current observations from temperate ecosystems like the Baltic Sea report a decline in spring bloom diatoms, while summer cyanobacteria blooms are becoming more frequent and...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8674317/ https://www.ncbi.nlm.nih.gov/pubmed/34911983 http://dx.doi.org/10.1038/s41598-021-03303-x |
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author | Albert, Séréna Hedberg, Per Motwani, Nisha H. Sjöling, Sara Winder, Monika Nascimento, Francisco J. A. |
author_facet | Albert, Séréna Hedberg, Per Motwani, Nisha H. Sjöling, Sara Winder, Monika Nascimento, Francisco J. A. |
author_sort | Albert, Séréna |
collection | PubMed |
description | In coastal aphotic sediments, organic matter (OM) input from phytoplankton is the primary food resource for benthic organisms. Current observations from temperate ecosystems like the Baltic Sea report a decline in spring bloom diatoms, while summer cyanobacteria blooms are becoming more frequent and intense. These climate-driven changes in phytoplankton communities may in turn have important consequences for benthic biodiversity and ecosystem functions, but such questions are not yet sufficiently explored experimentally. Here, in a 4-week experiment, we investigated the response of microeukaryotic and bacterial communities to different types of OM inputs comprising five ratios of two common phytoplankton species in the Baltic Sea, the diatom Skeletonema marinoi and filamentous cyanobacterium Nodularia spumigena. Metabarcoding analyses on 16S and 18S ribosomal RNA (rRNA) at the experiment termination revealed subtle but significant changes in diversity and community composition of microeukaryotes in response to settling OM quality. Sediment bacteria were less affected, although we observed a clear effect on denitrification gene expression (nirS and nosZ), which was positively correlated with increasing proportions of cyanobacteria. Altogether, these results suggest that future changes in OM input to the seafloor may have important effects on both the composition and function of microbenthic communities. |
format | Online Article Text |
id | pubmed-8674317 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-86743172021-12-16 Phytoplankton settling quality has a subtle but significant effect on sediment microeukaryotic and bacterial communities Albert, Séréna Hedberg, Per Motwani, Nisha H. Sjöling, Sara Winder, Monika Nascimento, Francisco J. A. Sci Rep Article In coastal aphotic sediments, organic matter (OM) input from phytoplankton is the primary food resource for benthic organisms. Current observations from temperate ecosystems like the Baltic Sea report a decline in spring bloom diatoms, while summer cyanobacteria blooms are becoming more frequent and intense. These climate-driven changes in phytoplankton communities may in turn have important consequences for benthic biodiversity and ecosystem functions, but such questions are not yet sufficiently explored experimentally. Here, in a 4-week experiment, we investigated the response of microeukaryotic and bacterial communities to different types of OM inputs comprising five ratios of two common phytoplankton species in the Baltic Sea, the diatom Skeletonema marinoi and filamentous cyanobacterium Nodularia spumigena. Metabarcoding analyses on 16S and 18S ribosomal RNA (rRNA) at the experiment termination revealed subtle but significant changes in diversity and community composition of microeukaryotes in response to settling OM quality. Sediment bacteria were less affected, although we observed a clear effect on denitrification gene expression (nirS and nosZ), which was positively correlated with increasing proportions of cyanobacteria. Altogether, these results suggest that future changes in OM input to the seafloor may have important effects on both the composition and function of microbenthic communities. Nature Publishing Group UK 2021-12-15 /pmc/articles/PMC8674317/ /pubmed/34911983 http://dx.doi.org/10.1038/s41598-021-03303-x Text en © The Author(s) 2021 https://creativecommons.org/licenses/by/4.0/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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence 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 licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Article Albert, Séréna Hedberg, Per Motwani, Nisha H. Sjöling, Sara Winder, Monika Nascimento, Francisco J. A. Phytoplankton settling quality has a subtle but significant effect on sediment microeukaryotic and bacterial communities |
title | Phytoplankton settling quality has a subtle but significant effect on sediment microeukaryotic and bacterial communities |
title_full | Phytoplankton settling quality has a subtle but significant effect on sediment microeukaryotic and bacterial communities |
title_fullStr | Phytoplankton settling quality has a subtle but significant effect on sediment microeukaryotic and bacterial communities |
title_full_unstemmed | Phytoplankton settling quality has a subtle but significant effect on sediment microeukaryotic and bacterial communities |
title_short | Phytoplankton settling quality has a subtle but significant effect on sediment microeukaryotic and bacterial communities |
title_sort | phytoplankton settling quality has a subtle but significant effect on sediment microeukaryotic and bacterial communities |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8674317/ https://www.ncbi.nlm.nih.gov/pubmed/34911983 http://dx.doi.org/10.1038/s41598-021-03303-x |
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