Dominance of ammonia-oxidizing archaea community induced by land use change from Masson pine to eucalypt plantation in subtropical China

2018-11-23 本站

题目：Dominance of ammonia-oxidizing archaea community induced by land use change from Masson pine to eucalypt plantation in subtropical China

期刊：Appl Microbiol Biotechnol 

作者：Fang-Qiu Zhang1,2，Wen Pan2，Ji-Dong Gu3，Bin Xu2，Wei-Hua Zhan2，Bao-Zhu Zhu2，Yu-Xia Wang2，Yong-Feng Wang1,2

单位：1.Guangdong Provincial Key Laboratory of Bio-control for the Forest Disease and PestGuangdong Academy of ForestryGuangzhouPeople’s Republic of China；2.Laboratory of Microbial Ecology and Toxicology,Guangdong Academy of Forestry,Guangzhou,People’s Republic of China ；3.Laboratory of Environmental Microbiology and Toxicology, School of Biological Sciences,The University of Hong Kong,Hong Kong,People’s Republic of China

摘要： A considerable proportion of Masson pine forests have been converted into eucalypt plantations in the last 30 years in Guangdong Province, subtropical China, for economic reasons, which may affect the ammonia-oxidizing archaea (AOA) community and the process of ammonia 美高梅ation. In order to determine the effects of forest conversion on AOA community, AOA communities in a Masson pine (Pinus massoniana) plantation and a eucalypt (Eucalyptus urophylla) plantation, which was converted from the Masson pine, were compared. Results showed that the land use change from the Masson pine to the eucalypt plantation decreased soil nutrient levels. A significant decrease of the potential nitrification rates (PNR) was also observed after the forest conversion (p < 5 %, n = 6). AOA were the only ammonia oxidizers in both plantations (no ammonia-oxidizing bacteria were detected). The detected AOA are affiliated with the genera Nitrosotalea and Nitrososphaera. A decrease of AOA abundance and an increase of the diversity were evident with the plantation conversion in the surface layer. AOA amoA gene diversity was negatively correlated with organic C and total N, respectively (p < 0.05, n = 12). AOA amoA gene abundance was negatively correlated with NH4 + and available P, respectively (p < 0.05, n = 12). However, AOA abundance was positively correlated with PNR, but not significantly (p < 0.05, n = 6), indicating AOA community change was only a partial reason for the decrease of PNR.

关键词：Ammonia-oxidizing archaea，Acidic soil，Land use change，Eucalyptus urophylla，Pinus massoniana