Activity, Abundance, and Community Composition of Anaerobic Ammonia–Oxidizing (Anammox) Bacteria in Sediment Cores of the Pearl River Estuary
Activity, Abundance, and Community Composition of Anaerobic Ammonia–Oxidizing (Anammox) Bacteria in Sediment Cores of the Pearl River Estuary
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珠江口沉积物核心中厌氧氨氧化（Anammox）细菌的活性、丰度和群落组成
DOI：
10.1007/s12237-019-00668-1
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发表时间：
2019-12
影响因子：
2.7
通讯作者：
Xiangyang Chang
中科院分区：
文献类型：
--
作者：
Jiapeng Wu;Yiguo Hong;Xiaomei Wen;Yiben Li;Yu Wang;Xiangyang Chang
Anaerobic ammonium oxidation (anammox) is an important pathway for the removal of fixed nitrogen from aquatic and terrestrial ecosystems. Previous studies on anammox were focused on the surface sediments in estuaries, but the activity and community composition of anammox bacteria in the estuarine subsurface sediments remained unknown. In this study, we used high-throughput sequencing of 16S rRNA gene combined with15N isotope tracing method to investigate the activity, diversity, and spatio-temporal distribution of anammox bacteria in sediment cores of the Pearl River Estuary (PRE). Our results indicated that anammox in the subsurface sediments has significant potential activity, contributing to approximately 17.49% of the total microbial nitrogen loss. A variety of anammox bacteria, includingCandidatusScalindua,Ca.Brocadia,Ca.Jettenia, andCa.Kuenenia, were all detected in the subsurface sediments. Moreover, the anammox bacterial community had a significant specific geographic distribution but no obvious difference along the sediment depth. Multiple environmental factors including salinity, and NH4+and NO3−contents, synergistically shaped the diversity and distribution of anammox bacteria in PRE sediments.
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