Ammonia-Oxidizing Archaea Are More Resistant Than Denitrifiers to Seasonal Precipitation Changes in an Acidic Subtropical Forest Soil
Seasonal precipitation changes are increasingly severe in subtropical areas. However, the responses of soil nitrogen (N) cycle and its associated functional microorganisms to such precipitation changes remain unclear. In this study, two projected precipitation patterns were manipulated: intensifying...
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doaj-10d159a8beca49cf8051fe2b5926ac1e2020-11-25T00:00:48ZengFrontiers Media S.A.Frontiers in Microbiology1664-302X2017-07-01810.3389/fmicb.2017.01384252652Ammonia-Oxidizing Archaea Are More Resistant Than Denitrifiers to Seasonal Precipitation Changes in an Acidic Subtropical Forest SoilJie Chen0Jie Chen1Jie Chen2Yanxia Nie3Wei Liu4Zhengfeng Wang5Weijun Shen6Center for Ecological and Environmental Sciences, South China Botanical Garden, Chinese Academy of SciencesGuangzhou, ChinaCollege of Life Science, University of Chinese Academy of SciencesBeijing, ChinaDepartment of Soil Science of Temperate Ecosystems, University of GöttingenGöttingen, GermanyCenter for Ecological and Environmental Sciences, South China Botanical Garden, Chinese Academy of SciencesGuangzhou, ChinaCenter for Ecological and Environmental Sciences, South China Botanical Garden, Chinese Academy of SciencesGuangzhou, ChinaCenter for Ecological and Environmental Sciences, South China Botanical Garden, Chinese Academy of SciencesGuangzhou, ChinaCenter for Ecological and Environmental Sciences, South China Botanical Garden, Chinese Academy of SciencesGuangzhou, ChinaSeasonal precipitation changes are increasingly severe in subtropical areas. However, the responses of soil nitrogen (N) cycle and its associated functional microorganisms to such precipitation changes remain unclear. In this study, two projected precipitation patterns were manipulated: intensifying the dry-season drought (DD) and extending the dry-season duration (ED) but increasing the wet-season storms following the DD and ED treatment period. The effects of these two contrasting precipitation patterns on soil net N transformation rates and functional gene abundances were quantitatively assessed through a resistance index. Results showed that the resistance index of functional microbial abundance (-0.03 ± 0.08) was much lower than that of the net N transformation rate (0.55 ± 0.02) throughout the experiment, indicating that microbial abundance was more responsive to precipitation changes compared with the N transformation rate. Spring drought under the ED treatment significantly increased the abundances of both nitrifying (amoA) and denitrifying genes (nirK, nirS, and nosZ), while changes in these gene abundances overlapped largely with control treatment during droughts in the dry season. Interestingly, the resistance index of the ammonia-oxidizing archaea (AOA) amoA abundance was significantly higher than that of the denitrifying gene abundances, suggesting that AOA were more resistant to the precipitation changes. This was attributed to the stronger environmental adaptability and higher resource utilization efficiency of the AOA community, as indicated by the lack of correlations between AOA gene abundance and environmental factors [i.e., soil water content, ammonium (NH4+) and dissolved organic carbon concentrations] during the experiment.http://journal.frontiersin.org/article/10.3389/fmicb.2017.01384/fullammonia-oxidizing archaeadenitrifiersnitrogen transformationprecipitation changeresistance indexsubtropical forest |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Jie Chen Jie Chen Jie Chen Yanxia Nie Wei Liu Zhengfeng Wang Weijun Shen |
spellingShingle |
Jie Chen Jie Chen Jie Chen Yanxia Nie Wei Liu Zhengfeng Wang Weijun Shen Ammonia-Oxidizing Archaea Are More Resistant Than Denitrifiers to Seasonal Precipitation Changes in an Acidic Subtropical Forest Soil Frontiers in Microbiology ammonia-oxidizing archaea denitrifiers nitrogen transformation precipitation change resistance index subtropical forest |
author_facet |
Jie Chen Jie Chen Jie Chen Yanxia Nie Wei Liu Zhengfeng Wang Weijun Shen |
author_sort |
Jie Chen |
title |
Ammonia-Oxidizing Archaea Are More Resistant Than Denitrifiers to Seasonal Precipitation Changes in an Acidic Subtropical Forest Soil |
title_short |
Ammonia-Oxidizing Archaea Are More Resistant Than Denitrifiers to Seasonal Precipitation Changes in an Acidic Subtropical Forest Soil |
title_full |
Ammonia-Oxidizing Archaea Are More Resistant Than Denitrifiers to Seasonal Precipitation Changes in an Acidic Subtropical Forest Soil |
title_fullStr |
Ammonia-Oxidizing Archaea Are More Resistant Than Denitrifiers to Seasonal Precipitation Changes in an Acidic Subtropical Forest Soil |
title_full_unstemmed |
Ammonia-Oxidizing Archaea Are More Resistant Than Denitrifiers to Seasonal Precipitation Changes in an Acidic Subtropical Forest Soil |
title_sort |
ammonia-oxidizing archaea are more resistant than denitrifiers to seasonal precipitation changes in an acidic subtropical forest soil |
publisher |
Frontiers Media S.A. |
series |
Frontiers in Microbiology |
issn |
1664-302X |
publishDate |
2017-07-01 |
description |
Seasonal precipitation changes are increasingly severe in subtropical areas. However, the responses of soil nitrogen (N) cycle and its associated functional microorganisms to such precipitation changes remain unclear. In this study, two projected precipitation patterns were manipulated: intensifying the dry-season drought (DD) and extending the dry-season duration (ED) but increasing the wet-season storms following the DD and ED treatment period. The effects of these two contrasting precipitation patterns on soil net N transformation rates and functional gene abundances were quantitatively assessed through a resistance index. Results showed that the resistance index of functional microbial abundance (-0.03 ± 0.08) was much lower than that of the net N transformation rate (0.55 ± 0.02) throughout the experiment, indicating that microbial abundance was more responsive to precipitation changes compared with the N transformation rate. Spring drought under the ED treatment significantly increased the abundances of both nitrifying (amoA) and denitrifying genes (nirK, nirS, and nosZ), while changes in these gene abundances overlapped largely with control treatment during droughts in the dry season. Interestingly, the resistance index of the ammonia-oxidizing archaea (AOA) amoA abundance was significantly higher than that of the denitrifying gene abundances, suggesting that AOA were more resistant to the precipitation changes. This was attributed to the stronger environmental adaptability and higher resource utilization efficiency of the AOA community, as indicated by the lack of correlations between AOA gene abundance and environmental factors [i.e., soil water content, ammonium (NH4+) and dissolved organic carbon concentrations] during the experiment. |
topic |
ammonia-oxidizing archaea denitrifiers nitrogen transformation precipitation change resistance index subtropical forest |
url |
http://journal.frontiersin.org/article/10.3389/fmicb.2017.01384/full |
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