Cargando…
Methane Production Rate during Anoxic Litter Decomposition Depends on Si Mass Fractions, Nutrient Stoichiometry, and Carbon Quality
While Si influences nutrient stoichiometry and decomposition of graminoid litter, it is still unclear how Si influences anoxic litter decomposition and CH(4) formation in graminoid dominated fen peatlands. First, Eriophorum vaginatum plants were grown under different Si and P availabilities, then sh...
Autores principales: | , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2021
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8063934/ https://www.ncbi.nlm.nih.gov/pubmed/33805021 http://dx.doi.org/10.3390/plants10040618 |
_version_ | 1783682039398006784 |
---|---|
author | Hömberg, Annkathrin Knorr, Klaus-Holger Schaller, Jörg |
author_facet | Hömberg, Annkathrin Knorr, Klaus-Holger Schaller, Jörg |
author_sort | Hömberg, Annkathrin |
collection | PubMed |
description | While Si influences nutrient stoichiometry and decomposition of graminoid litter, it is still unclear how Si influences anoxic litter decomposition and CH(4) formation in graminoid dominated fen peatlands. First, Eriophorum vaginatum plants were grown under different Si and P availabilities, then shoots and roots were characterized regarding their proportions of C, Si, N and P and regarding C quality. Subsequently the Eriophorum shoots were subjected to anoxic decomposition. We hypothesized; that (I) litter grown under high Si availability would show a higher Si but lower nutrient mass fractions and a lower share of recalcitrant carbon moieties; (II) high-Si litter would show higher CH(4) and CO(2) production rates during anoxic decomposition; (III) methanogenesis would occur earlier in less recalcitrant high-Si litter, compared to low-Si litter. We found a higher Si mass fraction that coincides with a general decrease in C and N mass fractions and decreased share of recalcitrant organic moieties. For high-Si litter, the CH(4) production rate was higher, but there was no long-term influence on the CO(2) production rate. More labile high-Si litter and a differential response in nutrient stoichiometry led to faster onset of methanogenesis. This may have important implications for our understanding of anaerobic carbon turnover in graminoid-rich fens. |
format | Online Article Text |
id | pubmed-8063934 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-80639342021-04-24 Methane Production Rate during Anoxic Litter Decomposition Depends on Si Mass Fractions, Nutrient Stoichiometry, and Carbon Quality Hömberg, Annkathrin Knorr, Klaus-Holger Schaller, Jörg Plants (Basel) Article While Si influences nutrient stoichiometry and decomposition of graminoid litter, it is still unclear how Si influences anoxic litter decomposition and CH(4) formation in graminoid dominated fen peatlands. First, Eriophorum vaginatum plants were grown under different Si and P availabilities, then shoots and roots were characterized regarding their proportions of C, Si, N and P and regarding C quality. Subsequently the Eriophorum shoots were subjected to anoxic decomposition. We hypothesized; that (I) litter grown under high Si availability would show a higher Si but lower nutrient mass fractions and a lower share of recalcitrant carbon moieties; (II) high-Si litter would show higher CH(4) and CO(2) production rates during anoxic decomposition; (III) methanogenesis would occur earlier in less recalcitrant high-Si litter, compared to low-Si litter. We found a higher Si mass fraction that coincides with a general decrease in C and N mass fractions and decreased share of recalcitrant organic moieties. For high-Si litter, the CH(4) production rate was higher, but there was no long-term influence on the CO(2) production rate. More labile high-Si litter and a differential response in nutrient stoichiometry led to faster onset of methanogenesis. This may have important implications for our understanding of anaerobic carbon turnover in graminoid-rich fens. MDPI 2021-03-24 /pmc/articles/PMC8063934/ /pubmed/33805021 http://dx.doi.org/10.3390/plants10040618 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) ). |
spellingShingle | Article Hömberg, Annkathrin Knorr, Klaus-Holger Schaller, Jörg Methane Production Rate during Anoxic Litter Decomposition Depends on Si Mass Fractions, Nutrient Stoichiometry, and Carbon Quality |
title | Methane Production Rate during Anoxic Litter Decomposition Depends on Si Mass Fractions, Nutrient Stoichiometry, and Carbon Quality |
title_full | Methane Production Rate during Anoxic Litter Decomposition Depends on Si Mass Fractions, Nutrient Stoichiometry, and Carbon Quality |
title_fullStr | Methane Production Rate during Anoxic Litter Decomposition Depends on Si Mass Fractions, Nutrient Stoichiometry, and Carbon Quality |
title_full_unstemmed | Methane Production Rate during Anoxic Litter Decomposition Depends on Si Mass Fractions, Nutrient Stoichiometry, and Carbon Quality |
title_short | Methane Production Rate during Anoxic Litter Decomposition Depends on Si Mass Fractions, Nutrient Stoichiometry, and Carbon Quality |
title_sort | methane production rate during anoxic litter decomposition depends on si mass fractions, nutrient stoichiometry, and carbon quality |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8063934/ https://www.ncbi.nlm.nih.gov/pubmed/33805021 http://dx.doi.org/10.3390/plants10040618 |
work_keys_str_mv | AT hombergannkathrin methaneproductionrateduringanoxiclitterdecompositiondependsonsimassfractionsnutrientstoichiometryandcarbonquality AT knorrklausholger methaneproductionrateduringanoxiclitterdecompositiondependsonsimassfractionsnutrientstoichiometryandcarbonquality AT schallerjorg methaneproductionrateduringanoxiclitterdecompositiondependsonsimassfractionsnutrientstoichiometryandcarbonquality |