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Methanogenic potential of archived soils

Malgorzata Brzezinska, Emilia Urbanek Orcid Logo, Pawel Szarlip, Teresa Wlodarczyk, Piotr Bulak, Anna Walkiewicz, Pawel Rafalski

Carpathian journal of earth and environmental sciences, Volume: 9, Issue: 2, Pages: 79 - 90

Swansea University Author: Emilia Urbanek Orcid Logo

Abstract

Methane (CH4) is an important element of the biogeochemical carbon cycle. Methanogenic Archaea are strict anaerobes able to survive in dry and oxic soils, but not in liquid or agar slurry. Little is known about the mechanisms of their survival. The aim of this paper is to study the methanogenic pote...

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Published in: Carpathian journal of earth and environmental sciences
Published: 2014
URI: https://cronfa.swan.ac.uk/Record/cronfa35685
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spelling 2017-09-27T13:05:58.1077279 v2 35685 2017-09-27 Methanogenic potential of archived soils 6d7e46bd913e12897d7f222ca78a718f 0000-0002-7748-4416 Emilia Urbanek Emilia Urbanek true false 2017-09-27 SGE Methane (CH4) is an important element of the biogeochemical carbon cycle. Methanogenic Archaea are strict anaerobes able to survive in dry and oxic soils, but not in liquid or agar slurry. Little is known about the mechanisms of their survival. The aim of this paper is to study the methanogenic potential of mineral soils stored as air-dry over 20 years. We tested the hypothesis that the recovery of CH4 formation is strongly associated with soil textures. Samples of 16 mineral topsoils characterized by various Corg, pH and particle size distribution (PSD), and stored under air-dry conditions over 20 years were flooded with: i) water and incubated in N2 atmosphere, or ii) with glucose solution without headspace gas exchange and incubated for 132 days. Gases were measured chromatographically, PSD by laser diffraction method. Microbial activity was restored in all tested soils, and CH4 and CO2 production started within a few days or weeks after flooding, depending on soil properties and incubation conditions. The glucose amendment resulted in a 2.8-fold increase in the total CH4 and CO2 release. However, in the presence of glucose, methanogens in three soils were outcompeted by other microorganisms, and required a long 132-d lag phase or did not start CH4 production at all. The CH4 positively correlated with the finer soil fractions, especially with fine silt and clay, while negatively with medium and coarse sand fractions. Consequently, silt loam soils showed approximately 5 and 2.5 times higher CH4 production, than soils with coarser textures (sand and sandy loam soils, respectively). In contrast, CO2 production was not influenced by soil texture. The Corg andmoisture retention in dry soils showed even stronger correlations with CH4 and CO2, except for CH4 released in the presence of glucose, where correlations with PSD were strongest. Most soil properties were associated with the first principal component (PC1), which explained 58.1% of the qualitative differences between the compared soils. The results stressed the significance of the inherent soil properties in determining the persistence of microorganisms responsible for CH4 and CO2 production over long storage in air-dry conditions. In fact, all analysed soil properties are related to each other and create specific habitats which allow microorganisms to persist in unfavourable conditions. Anaerobic incubations without C amendment resulted in CH4 production in all tested soils, while in some glucose enriched sand or sandy loam soils methanogens were outcompeted by other microorganisms. Journal Article Carpathian journal of earth and environmental sciences 9 2 79 90 soil, methane, dry storage 1 2 2014 2014-02-01 COLLEGE NANME Geography COLLEGE CODE SGE Swansea University 2017-09-27T13:05:58.1077279 2017-09-27T13:01:23.0767503 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Geography Malgorzata Brzezinska 1 Emilia Urbanek 0000-0002-7748-4416 2 Pawel Szarlip 3 Teresa Wlodarczyk 4 Piotr Bulak 5 Anna Walkiewicz 6 Pawel Rafalski 7
title Methanogenic potential of archived soils
spellingShingle Methanogenic potential of archived soils
Emilia Urbanek
title_short Methanogenic potential of archived soils
title_full Methanogenic potential of archived soils
title_fullStr Methanogenic potential of archived soils
title_full_unstemmed Methanogenic potential of archived soils
title_sort Methanogenic potential of archived soils
author_id_str_mv 6d7e46bd913e12897d7f222ca78a718f
author_id_fullname_str_mv 6d7e46bd913e12897d7f222ca78a718f_***_Emilia Urbanek
author Emilia Urbanek
author2 Malgorzata Brzezinska
Emilia Urbanek
Pawel Szarlip
Teresa Wlodarczyk
Piotr Bulak
Anna Walkiewicz
Pawel Rafalski
format Journal article
container_title Carpathian journal of earth and environmental sciences
container_volume 9
container_issue 2
container_start_page 79
publishDate 2014
institution Swansea University
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Biosciences, Geography and Physics - Geography{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Geography
document_store_str 0
active_str 0
description Methane (CH4) is an important element of the biogeochemical carbon cycle. Methanogenic Archaea are strict anaerobes able to survive in dry and oxic soils, but not in liquid or agar slurry. Little is known about the mechanisms of their survival. The aim of this paper is to study the methanogenic potential of mineral soils stored as air-dry over 20 years. We tested the hypothesis that the recovery of CH4 formation is strongly associated with soil textures. Samples of 16 mineral topsoils characterized by various Corg, pH and particle size distribution (PSD), and stored under air-dry conditions over 20 years were flooded with: i) water and incubated in N2 atmosphere, or ii) with glucose solution without headspace gas exchange and incubated for 132 days. Gases were measured chromatographically, PSD by laser diffraction method. Microbial activity was restored in all tested soils, and CH4 and CO2 production started within a few days or weeks after flooding, depending on soil properties and incubation conditions. The glucose amendment resulted in a 2.8-fold increase in the total CH4 and CO2 release. However, in the presence of glucose, methanogens in three soils were outcompeted by other microorganisms, and required a long 132-d lag phase or did not start CH4 production at all. The CH4 positively correlated with the finer soil fractions, especially with fine silt and clay, while negatively with medium and coarse sand fractions. Consequently, silt loam soils showed approximately 5 and 2.5 times higher CH4 production, than soils with coarser textures (sand and sandy loam soils, respectively). In contrast, CO2 production was not influenced by soil texture. The Corg andmoisture retention in dry soils showed even stronger correlations with CH4 and CO2, except for CH4 released in the presence of glucose, where correlations with PSD were strongest. Most soil properties were associated with the first principal component (PC1), which explained 58.1% of the qualitative differences between the compared soils. The results stressed the significance of the inherent soil properties in determining the persistence of microorganisms responsible for CH4 and CO2 production over long storage in air-dry conditions. In fact, all analysed soil properties are related to each other and create specific habitats which allow microorganisms to persist in unfavourable conditions. Anaerobic incubations without C amendment resulted in CH4 production in all tested soils, while in some glucose enriched sand or sandy loam soils methanogens were outcompeted by other microorganisms.
published_date 2014-02-01T03:44:28Z
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score 10.997843

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