Spatial distribution and abundances of ammonia-oxidizing archaea (AOA) and ammonia-oxidizing bacteria (AOB) in mangrove sediments

Autor: Meng Li, Ji-Dong Gu, Yiguo Hong, Huiluo Cao
Rok vydání: 2010
Předmět:
Salinity
Community structures
RNA
Archaeal
Mangrove sediments
Applied Microbiology and Biotechnology
Soil
Anammox
Abundance
Abundance (ecology)
RNA
Ribosomal
16S
Cluster Analysis
Phylogeny
Soil Microbiology
Diversity
biology
Ecology
Rhizophoraceae
General Medicine
Biodiversity
Hydrogen-Ion Concentration
RNA
Bacterial
DNA
Archaeal
Hong Kong
Mangrove
Soil microbiology
Oxidation-Reduction
Biotechnology
DNA
Bacterial
hzo gene
Molecular Sequence Data
Archaea - classification - isolation and purification
DNA
Ribosomal
Environmental Biotechnology
Ammonia
Sequence Homology
Nucleic Acid
Ammonia-oxidizing archaea (AOA)
Bacteria
Genes
rRNA
Bacteria - classification - isolation and purification
Sequence Analysis
DNA
Ammonia monooxygenase
biology.organism_classification
Archaea
Ammonia-oxidizing bacteria (AOB)
Ammonia - metabolism
Wetlands
Nitrification
Zdroj: Applied Microbiology and Biotechnology
ISSN: 1432-0614
Popis: We investigated the diversity, spatial distribution, and abundances of ammonia-oxidizing archaea (AOA) and ammonia-oxidizing bacteria (AOB) in sediment samples of different depths collected from a transect with different distances to mangrove forest in the territories of Hong Kong. Both the archaeal and bacterial amoA genes (encoding ammonia monooxygenase subunit A) from all samples supported distinct phylogenetic groups, indicating the presences of niche-specific AOA and AOB in mangrove sediments. The higher AOB abundances than AOA in mangrove sediments, especially in the vicinity of the mangrove trees, might indicate the more important role of AOB on nitrification. The spatial distribution showed that AOA had higher diversity and abundance in the surface layer sediments near the mangrove trees (0 and 10 m) but lower away from the mangrove trees (1,000 m), and communities of AOA could be clustered into surface and bottom sediment layer groups. In contrast, AOB showed a reverse distributed pattern, and its communities were grouped by the distances between sites and mangrove trees, indicating mangrove trees might have different influences on AOA and AOB community structures. Furthermore, the strong correlations among archaeal and bacterial amoA gene abundances and their ratio with NH 4 + , salinity, and pH of sediments indicated that these environmental factors have strong influences on AOA and AOB distributions in mangrove sediments. In addition, AOA diversity and abundances were significantly correlated with hzo gene abundances, which encodes the key enzyme for transformation of hydrazine into N 2 in anaerobic ammonium-oxidizing (anammox) bacteria, indicating AOA and anammox bacteria may interact with each other or they are influenced by the same controlling factors, such as NH 4 + . The results provide a better understanding on using mangrove wetlands as biological treatment systems for removal of nutrients. © 2011 Springer-Verlag.
published_or_final_version
Springer Open Choice, 21 Feb 2012
Databáze: OpenAIRE
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