Marine sediment metagenome
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA464199 | ENA |
REPOSITORIES: ENA
Similar Datasets
Project description:Characteristics of nirK-type denitrifier communities in the surface sediments from the South Yellow Sea and northern East China Sea
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Project description:Characteristics of archaeal communities in the surface sediments from the South Yellow Sea and northern East China Sea
| PRJNA464198 | ENA
Project description:Characteristics of bacterial community in the surface sediments from the South Yellow Sea and northern East China Sea
| PRJNA438732 | ENA
Project description:Characteristics of bacteria in the surface sediments from the South Yellow Sea and the northern East China Sea
| PRJNA438428 | ENA
Project description:Characteristics of bacterial communities in the surface sediments from the South Yellow Sea and northern East China Sea
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Project description:Characteristics of nirK-type ammonia-oxidizing archaeal communities in the surface sediments from the South Yellow Sea and northern East China Sea
| PRJNA464201 | ENA
Project description:Characteristics of bacterial, archaeal, and denitrifying microbial communities in the surface sediments from the South Yellow Sea and northern East China Sea
| PRJNA464366 | ENA
Project description:Coastal marine sediments, as locations of substantial fixed nitrogen loss, are very important to the nitrogen budget and to the primary productivity of the oceans. Coastal sediment systems are also highly dynamic and subject to periodic natural and anthropogenic organic substrate additions. The response to organic matter by the microbial community involved in nitrogen loss processes was evaluated using mesocosms of Chesapeake Bay sediments. Over the course of a 50-day incubation, rates of anammox and denitrification were measured weekly using 15N tracer incubations, and samples were collected for genetic analysis. Rates of both nitrogen loss processes and gene abundances associated with them corresponded loosely, probably because heterogeneities in sediments obscured a clear relationship. The rates of denitrification were stimulated more by the higher organic matter addition, and the fraction of nitrogen loss attributed to anammox slightly reduced. Furthermore, the large organic matter pulse drove a significant and rapid shift in the denitrifier community as determined using a nirS microarray, indicating the diversity of these organisms plays an essential role in responding to anthropogenic inputs. We also suggest that the proportion of nitrogen loss due to anammox in these coastal estuarine sediments may be underestimated due to temporal dynamics as well as from methodological artifacts related to conventional sediment slurry incubation approaches.
2015-01-30 | GSE65430 | GEO
Project description:This study examined archaeal lipidome of a total of 52 sediment and soil samples across a wide range of environmental gradients, including sediment from hot springs in Tengchong, Yunan Province, sediment from acid mine drainages in Anhui and Guangdong provinces, permafrost soil from Tibet Plateau, soil from Western Sichuan Plateau, surface sediment of cold seeps and sediment core material from the South China Sea, and sediment from the East China Sea.
2025-02-14 | MSV000097126 | MassIVE
Project description:The community composition (in terms of abundance, distribution and contribution of diverse clades) of bacteria involved in nitrogen transformations in the oxygen minimum zones may be related to the rates of fixed N loss in these systems. The abundance of both denirifying and anammox bacteria, and the assemblage composition of denitrifying bacteria were investigated in the Eastern Tropical South Pacific and the Arabian Sea using assays based on molecular markers for the two groups of bacteria. The abundance and distribution of bacteria associated with the fixed N removal processes denitrification and anammox were investigated using quantitative PCR for genes encoding nitrite reductase (nirK and nirS) in denitrifying bacteria and hydrazine oxidase(hzo) and 16S rRNA genesin anammox bacteria. All of these genes had depth distributions with maxima associated with the secondary nitrite maximum in low oxygen waters. NirS was mch more abundant than nirK, and much more abundant than the 16S rRNA gene from anammox bacteria. The ratio of hzo:16S rRNA for anammox was low and variable implying greater unexplored diversity in the the hzo gene. Assemblage composition of the abundant nirS-type denitrifiers was evaluated using a funcitonal gene microarray. Of the nirS archetypes represented on the microarray, very few occurred speficically in one region or depth interval, but the assemblages varied significantly. Community composition of denitrifiers based on microarray analysis of the nirS gene was most different between geographical regions. Within each region, the surface layer and OMZ assemblages clustered distinctly. Thus, in addition to spatial and temporal variation in denitrificaiton and anammox rates, both microbial abundance and community composition also vary between OMZ regions and depths.
2013-09-12 | GSE50787 | GEO