Effects of permafrost collapse on soil bacterial communities in a wet meadow on the northern Qinghai-Tibetan Plateau
Abstract Background Permafrost degradation may develop thermokarst landforms, which substantially change physico–chemical characteristics in the soil as well as the soil carbon stock. However, little is known about changes of bacterial community among the microfeatures within thermokarst area. Resul...
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doaj-b7d664416e2943e486aad3d8cee583932021-09-02T11:26:33ZengBMCBMC Ecology1472-67852018-08-0118111110.1186/s12898-018-0183-yEffects of permafrost collapse on soil bacterial communities in a wet meadow on the northern Qinghai-Tibetan PlateauXiaodong Wu0Haiyan Xu1Guimin Liu2Lin Zhao3Cuicui Mu4Cryosphere Research Station on the Qinghai-Tibetan Plateau, State Key Laboratory of Cryospheric Sciences, Northwest Institute of Eco-Environment and Resource, Chinese Academy of SciencesSchool of Environmental and Municipal Engineering, Lanzhou Jiaotong UniversitySchool of Environmental and Municipal Engineering, Lanzhou Jiaotong UniversityCryosphere Research Station on the Qinghai-Tibetan Plateau, State Key Laboratory of Cryospheric Sciences, Northwest Institute of Eco-Environment and Resource, Chinese Academy of SciencesKey Laboratory of Western China’s Environmental Systems (Ministry of Education), College of Earth and Environmental Sciences, Lanzhou UniversityAbstract Background Permafrost degradation may develop thermokarst landforms, which substantially change physico–chemical characteristics in the soil as well as the soil carbon stock. However, little is known about changes of bacterial community among the microfeatures within thermokarst area. Results We investigated bacterial communities using the Illumina sequencing method and examined their relationships with soil parameters in a thermokarst feature on the northern Qinghai-Tibetan Plateau. We categorized the ground surface into three different micro-relief patches based on the type and extent of permafrost collapse (control, collapsing and subsided areas). Permafrost collapse significantly decreased the soil carbon density and moisture content in the upper 10 cm samples in the collapsing areas. The highest loading factors for the first principal component (PC) extracted from the soil parameters were soil carbon and nitrogen contents, while soil moisture content and C:N ratios were the highest loading factors for the second PC. The relative abundance of Acidobacteria decreased with depth. Bacterial diversity in subsided areas was higher than that in control areas. Conclusions Bacterial community structure was significantly affected by pH and depth. The relative abundance of Gemmatimonadetes and Firmicutes were significantly correlated with the first and second PCs extracted from multiple soil parameters, suggesting these phyla could be used as indicators for the soil parameters in the thermokarst terrain.http://link.springer.com/article/10.1186/s12898-018-0183-yPermafrost degradationThermokarstRelative abundanceOrganic carbonDepthIllumina sequencing |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Xiaodong Wu Haiyan Xu Guimin Liu Lin Zhao Cuicui Mu |
spellingShingle |
Xiaodong Wu Haiyan Xu Guimin Liu Lin Zhao Cuicui Mu Effects of permafrost collapse on soil bacterial communities in a wet meadow on the northern Qinghai-Tibetan Plateau BMC Ecology Permafrost degradation Thermokarst Relative abundance Organic carbon Depth Illumina sequencing |
author_facet |
Xiaodong Wu Haiyan Xu Guimin Liu Lin Zhao Cuicui Mu |
author_sort |
Xiaodong Wu |
title |
Effects of permafrost collapse on soil bacterial communities in a wet meadow on the northern Qinghai-Tibetan Plateau |
title_short |
Effects of permafrost collapse on soil bacterial communities in a wet meadow on the northern Qinghai-Tibetan Plateau |
title_full |
Effects of permafrost collapse on soil bacterial communities in a wet meadow on the northern Qinghai-Tibetan Plateau |
title_fullStr |
Effects of permafrost collapse on soil bacterial communities in a wet meadow on the northern Qinghai-Tibetan Plateau |
title_full_unstemmed |
Effects of permafrost collapse on soil bacterial communities in a wet meadow on the northern Qinghai-Tibetan Plateau |
title_sort |
effects of permafrost collapse on soil bacterial communities in a wet meadow on the northern qinghai-tibetan plateau |
publisher |
BMC |
series |
BMC Ecology |
issn |
1472-6785 |
publishDate |
2018-08-01 |
description |
Abstract Background Permafrost degradation may develop thermokarst landforms, which substantially change physico–chemical characteristics in the soil as well as the soil carbon stock. However, little is known about changes of bacterial community among the microfeatures within thermokarst area. Results We investigated bacterial communities using the Illumina sequencing method and examined their relationships with soil parameters in a thermokarst feature on the northern Qinghai-Tibetan Plateau. We categorized the ground surface into three different micro-relief patches based on the type and extent of permafrost collapse (control, collapsing and subsided areas). Permafrost collapse significantly decreased the soil carbon density and moisture content in the upper 10 cm samples in the collapsing areas. The highest loading factors for the first principal component (PC) extracted from the soil parameters were soil carbon and nitrogen contents, while soil moisture content and C:N ratios were the highest loading factors for the second PC. The relative abundance of Acidobacteria decreased with depth. Bacterial diversity in subsided areas was higher than that in control areas. Conclusions Bacterial community structure was significantly affected by pH and depth. The relative abundance of Gemmatimonadetes and Firmicutes were significantly correlated with the first and second PCs extracted from multiple soil parameters, suggesting these phyla could be used as indicators for the soil parameters in the thermokarst terrain. |
topic |
Permafrost degradation Thermokarst Relative abundance Organic carbon Depth Illumina sequencing |
url |
http://link.springer.com/article/10.1186/s12898-018-0183-y |
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