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Enhanced silicon availability leads to increased methane production, nutrient and toxicant mobility in peatlands

Peatlands perform important ecosystem functions, such as carbon storage and nutrient retention, which are affected, among other factors, by vegetation and peat decomposition. The availability of silicon (Si) in peatlands differs strongly, ranging from <1 to >25 mg L(−1). Since decomposition of...

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Autores principales: Reithmaier, Gloria-Maria Susanne, Knorr, Klaus-Holger, Arnhold, Sebastian, Planer-Friedrich, Britta, Schaller, Jörg
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5562759/
https://www.ncbi.nlm.nih.gov/pubmed/28821870
http://dx.doi.org/10.1038/s41598-017-09130-3
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author Reithmaier, Gloria-Maria Susanne
Knorr, Klaus-Holger
Arnhold, Sebastian
Planer-Friedrich, Britta
Schaller, Jörg
author_facet Reithmaier, Gloria-Maria Susanne
Knorr, Klaus-Holger
Arnhold, Sebastian
Planer-Friedrich, Britta
Schaller, Jörg
author_sort Reithmaier, Gloria-Maria Susanne
collection PubMed
description Peatlands perform important ecosystem functions, such as carbon storage and nutrient retention, which are affected, among other factors, by vegetation and peat decomposition. The availability of silicon (Si) in peatlands differs strongly, ranging from <1 to >25 mg L(−1). Since decomposition of organic material was recently shown to be accelerated by Si, the aim of this study was to examine how Si influences decomposition of carbon and nutrient and toxicant mobilization in peatlands. We selected a fen site in Northern Bavaria with naturally bioavailable Si pore water concentrations of 5 mg/L and conducted a Si addition experiment. At a fourfold higher Si availability, dissolved organic carbon, carbon dioxide, and methane concentrations increased significantly. Furthermore, dissolved nitrogen, phosphorus, iron, manganese, cobalt, zinc, and arsenic concentrations were significantly higher under high Si availability. This enhanced mobilization may result from Si competing for binding sites but also from stronger reducing conditions, caused by accelerated respiration. The stronger reducing conditions also increased reduction of arsenate to arsenite and thus the mobility of this toxicant. Hence, higher Si availability is suggested to decrease carbon storage and increase nutrient and toxicant mobility in peatland ecosystems.
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spelling pubmed-55627592017-08-21 Enhanced silicon availability leads to increased methane production, nutrient and toxicant mobility in peatlands Reithmaier, Gloria-Maria Susanne Knorr, Klaus-Holger Arnhold, Sebastian Planer-Friedrich, Britta Schaller, Jörg Sci Rep Article Peatlands perform important ecosystem functions, such as carbon storage and nutrient retention, which are affected, among other factors, by vegetation and peat decomposition. The availability of silicon (Si) in peatlands differs strongly, ranging from <1 to >25 mg L(−1). Since decomposition of organic material was recently shown to be accelerated by Si, the aim of this study was to examine how Si influences decomposition of carbon and nutrient and toxicant mobilization in peatlands. We selected a fen site in Northern Bavaria with naturally bioavailable Si pore water concentrations of 5 mg/L and conducted a Si addition experiment. At a fourfold higher Si availability, dissolved organic carbon, carbon dioxide, and methane concentrations increased significantly. Furthermore, dissolved nitrogen, phosphorus, iron, manganese, cobalt, zinc, and arsenic concentrations were significantly higher under high Si availability. This enhanced mobilization may result from Si competing for binding sites but also from stronger reducing conditions, caused by accelerated respiration. The stronger reducing conditions also increased reduction of arsenate to arsenite and thus the mobility of this toxicant. Hence, higher Si availability is suggested to decrease carbon storage and increase nutrient and toxicant mobility in peatland ecosystems. Nature Publishing Group UK 2017-08-18 /pmc/articles/PMC5562759/ /pubmed/28821870 http://dx.doi.org/10.1038/s41598-017-09130-3 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
Reithmaier, Gloria-Maria Susanne
Knorr, Klaus-Holger
Arnhold, Sebastian
Planer-Friedrich, Britta
Schaller, Jörg
Enhanced silicon availability leads to increased methane production, nutrient and toxicant mobility in peatlands
title Enhanced silicon availability leads to increased methane production, nutrient and toxicant mobility in peatlands
title_full Enhanced silicon availability leads to increased methane production, nutrient and toxicant mobility in peatlands
title_fullStr Enhanced silicon availability leads to increased methane production, nutrient and toxicant mobility in peatlands
title_full_unstemmed Enhanced silicon availability leads to increased methane production, nutrient and toxicant mobility in peatlands
title_short Enhanced silicon availability leads to increased methane production, nutrient and toxicant mobility in peatlands
title_sort enhanced silicon availability leads to increased methane production, nutrient and toxicant mobility in peatlands
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5562759/
https://www.ncbi.nlm.nih.gov/pubmed/28821870
http://dx.doi.org/10.1038/s41598-017-09130-3
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