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Variations of activity and community structure of nitrite-driven anaerobic methanotrophs in soils between native and invasive species in China's coastal wetlands
European Journal of Soil Biology ( IF 4.2 ) Pub Date : 2024-01-09 , DOI: 10.1016/j.ejsobi.2023.103592 Jiaqi Liu , Weiqi Wang , Lidong Shen , Yanan Bai , Wangting Yang , Yuling Yang , Jiangbing Xu , Maohui Tian , Xin Liu , Jinghao Jin , Yuzhi Song
European Journal of Soil Biology ( IF 4.2 ) Pub Date : 2024-01-09 , DOI: 10.1016/j.ejsobi.2023.103592 Jiaqi Liu , Weiqi Wang , Lidong Shen , Yanan Bai , Wangting Yang , Yuling Yang , Jiangbing Xu , Maohui Tian , Xin Liu , Jinghao Jin , Yuzhi Song
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Nitrite-driven anaerobic oxidation of methane (nitrite-driven AOM), mediated by ‘ Methylomirabilis oxyfera’ ()-related bacteria, is a newly-discovered CH consumption process in coastal wetlands. Although invasion significantly affects CH emissions from coastal wetlands, its impact on the nitrite-driven AOM process and the underlying mechanisms remain unknown. Here, we examined nitrite-driven AOM activity and -related bacterial community in four coastal wetlands along the southeastern coast of China, under invasive and native plants, including , or . Linear mixed-effects models indicated that the invasion stimulated the overall nitrite-driven AOM activity by an average of 61.5% in coastal wetlands ( < 0.05), but had no impact on the -related bacterial abundance ( > 0.05). The nitrite-driven AOM activity was 7.1 times higher under than under native species in Yueqing Bay ( < 0.05), and was 34.7%, 8.9% and 15.1% higher under than under native species in Hengsha Island, Jiulong River and Zhanjiang, respectively ( > 0.05). invasion increased the bacterial abundance in Yueqing Bay and Jiulong River Estuary by 6.8 and 7.6 times, respectively, while decreased the abundance by 34.4% and 51.4%, respectively, in Hengsha Island and Zhanjiang ( > 0.05). The partial least squares path model indicated an indirect impact of invasion on the nitrite-driven AOM activity through its effect on soil properties, primarily including dissolved organic carbon content and nitrate content. The invasion did not greatly alter -related bacterial community. Overall, we shed new light on the potential impact of invasion on CH cycling in coastal wetlands.
更新日期：2024-01-09
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