title: Temporal and Spatial Dynamics of Sediment Anaerobic Ammonium Oxidation (Anammox) Bacteria in Freshwater Lakes.
abstract: Anaerobic ammonium-oxidizing (anammox) process can play an important role in freshwater nitrogen cycle. However, the distribution of anammox bacteria in freshwater lake and the associated environmental factors remain essentially unclear. The present study investigated the temporal and spatial dynamics of sediment anammox bacterial populations in eutrotrophic Dianchi Lake and mesotrophic Erhai Lake on the Yunnan Plateau (southwestern China). The remarkable spatial change of anammox bacterial abundance was found in Dianchi Lake, while the relatively slight spatial shift occurred in Erhai Lake. Dianchi Lake had greater anammox bacterial abundance than Erhai Lake. In both Dianchi Lake and Erhai Lake, anammox bacteria were much more abundant in summer than in spring. Anammox bacterial community richness, diversity, and structure in these two freshwater lakes were subjected to temporal and spatial variations. Sediment anammox bacterial communities in Dianchi Lake and Erhai Lake were dominated by Candidatus Brocadia and a novel phylotype followed by Candidatus Kuenenia; however, these two lakes had distinct anammox bacterial community structure. In addition, trophic status determined sediment anammox bacterial community structure.
authors.affiliation: State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China.
authors.forename: Yuyin
authors.initials: Y
authors.lastname: Yang
authors.affiliation: State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Dai
authors.affiliation: State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China.
authors.forename: Ningning
authors.initials: N
authors.lastname: Li
authors.affiliation: State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China.
authors.forename: Bingxin
authors.initials: B
authors.lastname: Li
authors.affiliation: State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China. xiesg@pku.edu.cn.
authors.forename: Shuguang
authors.initials: S
authors.lastname: Xie
authors.affiliation: Key Laboratory of Water and Sediment Sciences (Ministry of Education), College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China. yongliu@pku.edu.cn.
authors.forename: Yong
authors.initials: Y
authors.lastname: Liu
mesh_terms: D064751:Ammonium Compounds / Q000378:metabolism*; D000693:Anaerobiosis; D001419:Bacteria / Q000145:classification* / Q000235:genetics / Q000378:metabolism*; D001421:Bacteria, Anaerobic / Q000145:classification / Q000235:genetics / Q000378:metabolism; D044822:Biodiversity; D002681:China; D004269:DNA, Bacterial; D005618:Fresh Water / Q000737:chemistry / Q000382:microbiology*; D005798:Genes, Bacterial; D019015:Geologic Sediments / Q000737:chemistry / Q000382:microbiology*; D059014:High-Throughput Nucleotide Sequencing / Q000379:methods; D060106:Lakes / Q000737:chemistry / Q000382:microbiology*; D005810:Multigene Family; D058458:Nitrogen Cycle; D010084:Oxidation-Reduction; D010802:Phylogeny; D061328:Planctomycetales / Q000378:metabolism; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D012621:Seasons
chemical_list: D064751:Ammonium Compounds; D004269:DNA, Bacterial; D012336:RNA, Ribosomal, 16S
keywords: Anaerobic ammonium oxidation; Freshwater; High-throughput sequencing analysis; Sediment