ArticleEnvironmental microbiology2014
Profiling gene expression to distinguish the likely active diazotrophs from a sea of genetic potential in marine sediments.
Article in Environmental microbiology, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
16 citing papers in PubMed, 43 citations in OpenAlex.
- Biogeography and community stability of leaf endophytic diazotrophs in mangrove Kandelia obovata.Communications biology · 2026Article
- Enhancing Role of Nitrogen Fixation in Biogeochemical Cycles of the Pacific Arctic.Global change biology · 2026Article
- A global dataset of nitrogen fixation rates across inland and coastal waters.Limnology and oceanography letters · 2025Article
- Phagotrophy in the nitrogen-fixing haptophyte Braarudosphaera bigelowii.Environmental microbiology reports · 2024Article
- Non-cyanobacterial diazotrophs: global diversity, distribution, ecophysiology, and activity in marine waters.FEMS microbiology reviews · 2023Review
- Nitrogen fixation: a poorly understood process along the freshwater-marine continuum.Limnology and oceanography letters · 2022Article
- Global distribution patterns of marine nitrogen-fixers by imaging and molecular methods.Nature communications · 2021Article
- The role of seagrass vegetation and local environmental conditions in shaping benthic bacterial and macroinvertebrate communities in a tropical coastal lagoon.Scientific reports · 2020Article
- Article
- Nitrogen fixing bacterial diversity in a tropical estuarine sediments.World journal of microbiology & biotechnology · 2017Article
- Chasing after Non-cyanobacterial Nitrogen Fixation in Marine Pelagic Environments.Frontiers in microbiology · 2017Article
- Article
- Seagrass (Zostera marina) Colonization Promotes the Accumulation of Diazotrophic Bacteria and Alters the Relative Abundances of Specific Bacterial Lineages Involved in Benthic Carbon and Sulfur Cycling.Applied and environmental microbiology · 2015Article
- Significant N₂ fixation by heterotrophs, photoheterotrophs and heterocystous cyanobacteria in two temperate estuaries.The ISME journal · 2015Article
- Drivers of the dynamics of diazotrophs and denitrifiers in North Sea bottom waters and sediments.Frontiers in microbiology · 2015Article
- Examining the impact of acetylene on N-fixation and the active sediment microbial community.Frontiers in microbiology · 2015Article
Corrections and comments
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Authors and funding
2 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Nitrogen (N) cycling microbial communities in marine sediments are extremely diverse, and it is unknown whether this diversity reflects extensive functional redundancy. Sedimentary denitrifiers remove significant amounts of N from the coastal ocean and diazotrophs are typically regarded as inconsequential. Recently, N fixation has been shown to be a potentially important source of N in estuarine and continental shelf sediments. Analysis of expressed genes for nitrite reductase (nirS) and a nitrogenase subunit (nifH) was used to identify the likely active denitrifiers and nitrogen fixers in surface sediments from different seasons in Narragansett Bay (Rhode Island, USA). The overall diversity of diazotrophs expressing nifH decreased along the estuarine gradient from the estuarine head to an offshore continental shelf site. Two groups of sequences related to anaerobic sulphur/iron reducers and sulphate reducers dominated libraries of expressed nifH genes. Quantitative polymerase chain reaction (qPCR) and quantitative reverse transcription polymerase chain reaction (qRT-PCR) data shows the highest abundance of both groups at a mid bay site, and the highest nifH expression at the head of the estuary, regardless of season. Several potential environmental factors, including water temperature, oxygen concentration and metal contamination, may influence the abundance and nifH expression of these two bacterial groups.
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