Influences of infaunal burrows on the community structure and activity of ammonia-oxidizing bacteria in intertidal sediments

Article Abstract:

The combination of a 16S rRNA gene-based molecular approach and microelectrodes was used to analyze the influences of infaunal burrows constructed by the polychaete (Tylorrhynchus heterochaetus) on [O.sub.2] concentrations and community structures and abundance of ammonia-oxidizing bacteria (AOB) and nitrite-oxidizing bacteria (NOB) in intertidal sediments. The results demonstrate that the infaunal burrows stimulated [O.sub.2] transport into the sediment in which otherwise reducing conditions prevailed, resulting in development of high N[H.sub.4.sup.+] consumption capacity.

Polychaeta, Polychaetes, Anaerobic bacteria, Nucleotide sequencing

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Isolation of Methylophaga spp. from marine dimethylsulfide-degrading enrichment cultures and identification of polypeptides induced during growth on dimethylsulfide

Article Abstract:

The identification of bacterial populations in marine dimethylsulfide (DMS)-degrading enrichment cultures, the isolates capable of growth on DMS and polypeptides involved in metabolism of DMS are described. Sodium dodecyl sulfate-polyacrylamide gel electrophoresis analysis of cell extracts from biomass of a Methylophaga isolate has disclosed polypeptides induced during growth on DMS.

All Other Basic Organic Chemical Manufacturing, Industrial Organic Chemicals, Methyl Sulfide, Growth, Bacterial growth, Gel electrophoresis, Marine bacteria, Dimethyl sulfide, Company growth, Chemical properties

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