ArticleMicrobiome2021
Depth-dependent variability of biological nitrogen fixation and diazotrophic communities in mangrove sediments.
Article in Microbiome, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers.
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Who cites it
23 citing papers in PubMed.
- Comparative genomic analysis of Agrobacterium salinitolerans provides insights into genetic diversity and pathogenic potential.Archives of microbiology · 2026Article
- Vertical Stratification in Composition, Metabolic Potential and Co-Occurrence Networks of Archaeal Communities in Mangrove Sediments, Zhanjiang, China.Ecology and evolution · 2026Article
- Sulfur-cycling diazotrophs dominate nitrogen fixation in seagrass sediments.Applied and environmental microbiology · 2026Article
- Review
- Metagenomic insights into viral and microbial genes of Russian High-Arctic soil microbiomes.Communications biology · 2026Article
- Genomic insights into the mangrove-associated cultivable bacteria and their ecological function.iScience · 2025Article
- Cultivation and metabolic versatility of novel and ubiquitous chemolithoautotrophicMicrobiology spectrum · 2025Article
- Environment selected microbial function rather than taxonomic species in a plateau saline-alkaline wetland.Applied and environmental microbiology · 2025Article
- Fungi promote cross-domain interactions even in deep anoxic mangrove sediments.Environmental microbiome · 2025Article
- Article
- Article
- Mechanisms underlying the interactions and adaptability of nitrogen removal microorganisms in freshwater sediments.Advanced biotechnology · 2024Article
- The impact of different preceding crops on soil nitrogen structure and nitrogen cycling in tobacco-planting soil.Scientific reports · 2024Article
- Chemolithoautotrophic diazotrophs dominate dark nitrogen fixation in mangrove sediments.The ISME journal · 2024Article
- Diazotrophic community in the sediments of Poyang Lake in response to water level fluctuations.Frontiers in microbiology · 2024Article
- Phylogenetic and ecophysiological novelty of subsurface mercury methylators in mangrove sediments.The ISME journal · 2023Article
- Microbial biogeochemical cycling reveals the sustainability of the rice-crayfish co-culture model.iScience · 2023Article
- N/S element transformation modulating lithospheric microbial communities by single-species manipulation.Microbiome · 2023Article
- Vertically stratified methane, nitrogen and sulphur cycling and coupling mechanisms in mangrove sediment microbiomes.Microbiome · 2023Article
- Denitrification in hypersaline and coastal environments.FEMS microbiology letters · 2023Article
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Authors and funding
13 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundNitrogen-fixing prokaryotes (diazotrophs) contribute substantially to nitrogen input in mangrove sediments, and their structure and nitrogen fixation rate (NFR) are significantly controlled by environmental conditions. Despite the well-known studies on diazotrophs in surficial sediments, the diversity, structure, and ecological functions of diazotrophic communities along environmental gradients of mangrove sediment across different depths are largely unknown. Here, we investigated how biological nitrogen fixation varied with the depth of mangrove sediments from the perspectives of both NFR and diazotrophic communities.
resultsThrough acetylene reduction assay, nifH gene amplicon and metagenomic sequencing, we found that the NFR increased but the diversity of diazotrophic communities decreased with the depth of mangrove sediments. The structure of diazotrophic communities at different depths was largely driven by salinity and exhibited a clear divergence at the partitioning depth of 50 cm. Among diazotrophic genera correlated with NFR, Agrobacterium and Azotobacter were specifically enriched at 50-100 cm sediments, while Anaeromyxobacter, Rubrivivax, Methylocystis, Dickeya, and Methylomonas were more abundant at 0-50 cm. Consistent with the higher NFR, metagenomic analysis demonstrated the elevated abundance of nitrogen fixation genes (nifH/D/K) in deep sediments, where nitrification genes (amoA/B/C) and denitrification genes (nirK and norB) became less abundant. Three metagenome-assembled genomes (MAGs) of diazotrophs from deep mangrove sediments indicated their facultatively anaerobic and mixotrophic lifestyles as they contained genes for low-oxygen-dependent metabolism, hydrogenotrophic respiration, carbon fixation, and pyruvate fermentation.
conclusionsThis study demonstrates the depth-dependent variability of biological nitrogen fixation in terms of NFR and diazotrophic communities, which to a certain extent relieves the degree of nitrogen limitation in deep mangrove sediments. Video Abstract.
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