Diversity and distribution of anammox bacteria in water column and sediments of the Eastern Indian Ocean

作者: Gang Qian , Jing Wang , Jinjun Kan , Xiaodong Zhang , Zhiqiang Xia

DOI: 10.1016/J.IBIOD.2018.05.015

关键词: Environmental chemistryScalinduaNitrateWater columnCanonical correspondence analysisAnammoxNitrogen cycleLibraryEnvironmental scienceSediment

摘要: Abstract Anaerobic ammonium oxidization (anammox) has been widely recognized for its importance in global nitrogen cycle. While, their distributions the Eastern Indian Ocean (EIO) still remain unknown. This study investigated diversity and abundance of anammox bacteria from water column (0–2000 m with seven depths) down to surface sediments EIO targeting 16S rRNA gene by using clone library quantitative real-time PCR (qPCR) analysis. Results showed a wide distribution both EIO, Candidatus Scalindua sp. assemblage as predominant group among communities. The was higher column, but abundances (based on copy numbers gene) were lower than corresponding sediment samples. Non-metric multidimensional scaling analysis demonstrated distinct spatial patterns (both horizontal vertical): samples Bay Bengal Equator strong stratification different layers other two regions. Canonical correspondence indicated that dissolved oxygen, temperature, nitrate major environmental factors shaping bacteria. is first investigation detailed community structure results are consistent (i) potential contribution sedimentary towards removal, (ii) dispersal via ocean.

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