PMID- 21665398 OWN - NLM STAT- MEDLINE DCOM- 20120209 LR - 20151119 IS - 1618-0984 (Electronic) IS - 0723-2020 (Linking) VI - 34 IP - 7 DP - 2011 Nov TI - Diversity and abundance of ammonia-oxidizing archaea and bacteria in polluted mangrove sediment. PG - 513-23 LID - 10.1016/j.syapm.2010.11.023 [doi] AB - Ammonia oxidation by microorganisms is a critical process in the nitrogen cycle. Recent research results show that ammonia-oxidizing archaea (AOA) are both abundant and diverse in a range of ecosystems. In this study, we examined the abundance and diversity of AOA and ammonia-oxidizing beta-proteobacteria (AOB) in estuarine sediments in Hong Kong for two seasons using the ammonia monooxygenase A subunit gene (amoA) as molecular biomarker. Relationships between diversity and abundance of AOA and AOB and physicochemical parameters were also explored. AOB were more diverse but less abundant than AOA. A few phylogenetically distinct amoA gene clusters were evident for both AOA and AOB from the mangrove sediment. Pearson moment correlation analysis and canonical correspondence analysis (CCA) were used to explore physicochemical parameters potentially important to AOA and AOB. Metal concentrations were proposed to contribute potentially to the distributions of AOA while total phosphorus (TP) was correlated to the distributions of AOB. Quantitative PCR estimates indicated that AOA were more abundant than AOB in all samples, but the ratio of AOA/AOB (from 1.8 to 6.3) was smaller than most other studies by one to two orders. The abundance of AOA or AOB was correlated with pH and temperature while the AOA/AOB ratio was with the concentrations of ammonium. Several physicochemical factors, rather than any single one, affect the distribution patterns suggesting that a combination of factors is involved in shaping the dynamics of AOA and AOB in the mangrove ecosystem. CI - Copyright (c) 2011 Elsevier GmbH. All rights reserved. FAU - Cao, Huiluo AU - Cao H AD - School of Biological Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, China. FAU - Li, Meng AU - Li M FAU - Hong, Yiguo AU - Hong Y FAU - Gu, Ji-Dong AU - Gu JD LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20110612 PL - Germany TA - Syst Appl Microbiol JT - Systematic and applied microbiology JID - 8306133 RN - 0 (Biomarkers) RN - 0 (Metals) RN - 0 (Quaternary Ammonium Compounds) RN - 27YLU75U4W (Phosphorus) RN - 7664-41-7 (Ammonia) RN - EC 1.- (Oxidoreductases) RN - EC 1.7.3.- (ammonia monooxygenase) SB - IM MH - Ammonia/*metabolism MH - Archaea/chemistry/classification/genetics/*isolation & purification MH - Betaproteobacteria/chemistry/classification/genetics/*isolation & purification MH - Biodiversity MH - Biomarkers/chemistry MH - Biota MH - Cloning, Molecular MH - Environment MH - Environmental Microbiology MH - Environmental Pollution MH - Genes, Archaeal MH - Genes, Bacterial MH - Geologic Sediments/analysis/chemistry/*microbiology MH - Hong Kong MH - Hydrogen-Ion Concentration MH - Metals/chemistry MH - Multigene Family MH - Oxidation-Reduction MH - Oxidoreductases/genetics MH - Phosphorus/chemistry MH - Phylogeny MH - Quaternary Ammonium Compounds/chemistry MH - Rhizophoraceae MH - Seasons MH - Species Specificity MH - Temperature EDAT- 2011/06/15 06:00 MHDA- 2012/02/10 06:00 CRDT- 2011/06/14 06:00 PHST- 2010/04/19 00:00 [received] PHST- 2010/11/15 00:00 [revised] PHST- 2010/11/15 00:00 [accepted] PHST- 2011/06/14 06:00 [entrez] PHST- 2011/06/15 06:00 [pubmed] PHST- 2012/02/10 06:00 [medline] AID - S0723-2020(11)00116-0 [pii] AID - 10.1016/j.syapm.2010.11.023 [doi] PST - ppublish SO - Syst Appl Microbiol. 2011 Nov;34(7):513-23. doi: 10.1016/j.syapm.2010.11.023. Epub 2011 Jun 12.