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

Abstract 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 decomposi...

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Autores principales:	Gloria-Maria Susanne Reithmaier, Klaus-Holger Knorr, Sebastian Arnhold, Britta Planer-Friedrich, Jörg Schaller
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/e67fb877f0354a6e99c1152be3f06c28
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spelling	oai:doaj.org-article:e67fb877f0354a6e99c1152be3f06c282021-12-02T15:05:26ZEnhanced silicon availability leads to increased methane production, nutrient and toxicant mobility in peatlands10.1038/s41598-017-09130-32045-2322https://doaj.org/article/e67fb877f0354a6e99c1152be3f06c282017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-09130-3https://doaj.org/toc/2045-2322Abstract 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.Gloria-Maria Susanne ReithmaierKlaus-Holger KnorrSebastian ArnholdBritta Planer-FriedrichJörg SchallerNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-8 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Gloria-Maria Susanne Reithmaier Klaus-Holger Knorr Sebastian Arnhold Britta Planer-Friedrich Jörg Schaller Enhanced silicon availability leads to increased methane production, nutrient and toxicant mobility in peatlands
description	Abstract 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.
format	article
author	Gloria-Maria Susanne Reithmaier Klaus-Holger Knorr Sebastian Arnhold Britta Planer-Friedrich Jörg Schaller
author_facet	Gloria-Maria Susanne Reithmaier Klaus-Holger Knorr Sebastian Arnhold Britta Planer-Friedrich Jörg Schaller
author_sort	Gloria-Maria Susanne Reithmaier
title	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_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_sort	enhanced silicon availability leads to increased methane production, nutrient and toxicant mobility in peatlands
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/e67fb877f0354a6e99c1152be3f06c28
work_keys_str_mv	AT gloriamariasusannereithmaier enhancedsiliconavailabilityleadstoincreasedmethaneproductionnutrientandtoxicantmobilityinpeatlands AT klausholgerknorr enhancedsiliconavailabilityleadstoincreasedmethaneproductionnutrientandtoxicantmobilityinpeatlands AT sebastianarnhold enhancedsiliconavailabilityleadstoincreasedmethaneproductionnutrientandtoxicantmobilityinpeatlands AT brittaplanerfriedrich enhancedsiliconavailabilityleadstoincreasedmethaneproductionnutrientandtoxicantmobilityinpeatlands AT jorgschaller enhancedsiliconavailabilityleadstoincreasedmethaneproductionnutrientandtoxicantmobilityinpeatlands
_version_	1718388864030081024

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

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