Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8364253 | Soil Biology and Biochemistry | 2015 | 9 Pages |
Abstract
Anaerobic ammonium oxidation (anammox) and nitrite-dependent anaerobic methane oxidation (n-damo) are two recently discovered processes in the nitrogen cycle that are catalysed by anammox bacteria and n-damo bacteria, respectively. Here, the depth-specific distribution and importance of anammox bacteria and n-damo bacteria were studied in an urban wetland, Xixi Wetland, Zhejiang Province (China). Anammox bacteria related to Candidatus Brocadia, Candidatus Kuenenia and Candidatus Anammoxoglobus, and n-damo bacteria related to “Candidatus Methylomirabilis oxyfera” were present in the collected soil samples. The abundance of anammox bacteria (2.6-8.6 Ã 106 copies gâ1 dry soil) in the shallow soils (0-10 cm and 20-30 cm) was higher than that (2.5-9.8 Ã 105 copies gâ1 dry soil) in the deep soils, whereas the abundance of n-damo bacteria (0.6-1.3 Ã 107 copies gâ1 dry soil) in the deep soils (50-60 cm and 90-100 cm) was higher than that (3.4-4.5 Ã 106 copies gâ1 dry soil) in the shallow soils. Anammox activity was detected at all depths, and higher potential rates (12.1-21.4 nmol N2 gâ1 dry soil dâ1) were observed at depths of 0-10 cm and 20-30 cm compared with the rates (3.5-8.7 nmol N2 gâ1 dry soil dâ1) measured at depths of 50-60 and 90-100 cm. In contrast, n-damo was mainly occurred at depths of 50-60 cm and 90-100 cm with potential rates of 0.7-5.0 nmol CO2 gâ1 dry soil dâ1. This study suggested the niche segregation of the anammox bacteria and n-damo bacteria in wetland soils, with anammox bacteria being active primarily in deep soils and n-damo bacteria being active primarily in shallow soils.
Related Topics
Life Sciences
Agricultural and Biological Sciences
Soil Science
Authors
Li-dong Shen, Shuai Liu, Zhan-fei He, Xu Lian, Qian Huang, Yun-feng He, Li-ping Lou, Xiang-yang Xu, Ping Zheng, Bao-lan Hu,