Soil bacterial community composition and diversity response to land conversion is depth-dependent

Background: Transitions from traditional cropping systems to afforestation and agroforestry practices are the most common patterns of land use change in China, but little is known about how soil properties and bacterial communities are altered. This study compared four afforestation and agroforestry...

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Autores principales:	Jing Guo, Yaqiong Wu, Xiaohong Wu, Zhong Ren, Guibin Wang
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Land conversion Soil bacterial community Soil properties High-throughput sequencing Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/44bef886ff264de69d275e74948479d3
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spelling	oai:doaj.org-article:44bef886ff264de69d275e74948479d32021-11-18T04:49:16ZSoil bacterial community composition and diversity response to land conversion is depth-dependent2351-989410.1016/j.gecco.2021.e01923https://doaj.org/article/44bef886ff264de69d275e74948479d32021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S235198942100473Xhttps://doaj.org/toc/2351-9894Background: Transitions from traditional cropping systems to afforestation and agroforestry practices are the most common patterns of land use change in China, but little is known about how soil properties and bacterial communities are altered. This study compared four afforestation and agroforestry practices that had been converted from corn and wheat rotation systems for several years with adjacent legacy corn and wheat rotation systems to test the impacts of these land conversions on soil properties and bacterial communities. Results: The results revealed that afforestation and agroforestry practices significantly increased soil organic carbon (SOC) and total nitrogen (TN) levels compared with those in the legacy cropping systems, and the ginkgo (Ginkgo biloba L.)-wheat (Triticum aestivum L.) system had the highest SOC and TN contents. Afforestation and agroforestry practices increased the number of unique bacterial operational taxonomic units (OTUs) in the topsoil and subsoil, and the metasequoia (Metasequoia glyptostroboides Hu et Cheng) system had the highest diversity and richness indices. Land conversion had a greater effect on the bacterial community beta diversity in the topsoil than in the subsoil. Redundancy analysis (RDA) showed that SOC, TN, and total phosphorus (TP) were the most important factors explaining variations in the bacterial community structure. The bacterial phyla Proteobacteria, Acidobacteria, Chloroflexi, Actinobacteria, and Nitrospirae dominated both the topsoil and the subsoil, and Proteobacteria was the most abundant. Alphaproteobacteria and Betaproteobacteria were the dominant classes. Only the relative abundance of Actinobacteria was significantly different among land use patterns in both the topsoil and the subsoil, and Nitrospirae was significantly different among land use patterns only in the topsoil, with higher relative abundance in the gingko and metasequoia systems, while other bacterial phyla were not markedly affected by land conversion. Conclusion: The results demonstrate that afforestation and agroforestry practices have significant impacts on the soil bacterial community and may be key factors influencing taxonomic shifts and functional variations in bacterial communities, especially in the topsoil.Jing GuoYaqiong WuXiaohong WuZhong RenGuibin WangElsevierarticleLand conversionSoil bacterial communitySoil propertiesHigh-throughput sequencingEcologyQH540-549.5ENGlobal Ecology and Conservation, Vol 32, Iss , Pp e01923- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Land conversion Soil bacterial community Soil properties High-throughput sequencing Ecology QH540-549.5
spellingShingle	Land conversion Soil bacterial community Soil properties High-throughput sequencing Ecology QH540-549.5 Jing Guo Yaqiong Wu Xiaohong Wu Zhong Ren Guibin Wang Soil bacterial community composition and diversity response to land conversion is depth-dependent
description	Background: Transitions from traditional cropping systems to afforestation and agroforestry practices are the most common patterns of land use change in China, but little is known about how soil properties and bacterial communities are altered. This study compared four afforestation and agroforestry practices that had been converted from corn and wheat rotation systems for several years with adjacent legacy corn and wheat rotation systems to test the impacts of these land conversions on soil properties and bacterial communities. Results: The results revealed that afforestation and agroforestry practices significantly increased soil organic carbon (SOC) and total nitrogen (TN) levels compared with those in the legacy cropping systems, and the ginkgo (Ginkgo biloba L.)-wheat (Triticum aestivum L.) system had the highest SOC and TN contents. Afforestation and agroforestry practices increased the number of unique bacterial operational taxonomic units (OTUs) in the topsoil and subsoil, and the metasequoia (Metasequoia glyptostroboides Hu et Cheng) system had the highest diversity and richness indices. Land conversion had a greater effect on the bacterial community beta diversity in the topsoil than in the subsoil. Redundancy analysis (RDA) showed that SOC, TN, and total phosphorus (TP) were the most important factors explaining variations in the bacterial community structure. The bacterial phyla Proteobacteria, Acidobacteria, Chloroflexi, Actinobacteria, and Nitrospirae dominated both the topsoil and the subsoil, and Proteobacteria was the most abundant. Alphaproteobacteria and Betaproteobacteria were the dominant classes. Only the relative abundance of Actinobacteria was significantly different among land use patterns in both the topsoil and the subsoil, and Nitrospirae was significantly different among land use patterns only in the topsoil, with higher relative abundance in the gingko and metasequoia systems, while other bacterial phyla were not markedly affected by land conversion. Conclusion: The results demonstrate that afforestation and agroforestry practices have significant impacts on the soil bacterial community and may be key factors influencing taxonomic shifts and functional variations in bacterial communities, especially in the topsoil.
format	article
author	Jing Guo Yaqiong Wu Xiaohong Wu Zhong Ren Guibin Wang
author_facet	Jing Guo Yaqiong Wu Xiaohong Wu Zhong Ren Guibin Wang
author_sort	Jing Guo
title	Soil bacterial community composition and diversity response to land conversion is depth-dependent
title_short	Soil bacterial community composition and diversity response to land conversion is depth-dependent
title_full	Soil bacterial community composition and diversity response to land conversion is depth-dependent
title_fullStr	Soil bacterial community composition and diversity response to land conversion is depth-dependent
title_full_unstemmed	Soil bacterial community composition and diversity response to land conversion is depth-dependent
title_sort	soil bacterial community composition and diversity response to land conversion is depth-dependent
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/44bef886ff264de69d275e74948479d3
work_keys_str_mv	AT jingguo soilbacterialcommunitycompositionanddiversityresponsetolandconversionisdepthdependent AT yaqiongwu soilbacterialcommunitycompositionanddiversityresponsetolandconversionisdepthdependent AT xiaohongwu soilbacterialcommunitycompositionanddiversityresponsetolandconversionisdepthdependent AT zhongren soilbacterialcommunitycompositionanddiversityresponsetolandconversionisdepthdependent AT guibinwang soilbacterialcommunitycompositionanddiversityresponsetolandconversionisdepthdependent
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Soil bacterial community composition and diversity response to land conversion is depth-dependent

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