ArticleProceedings of the National Academy of Sciences of the United States of America2015
Phytoplankton-bacterial interactions mediate micronutrient colimitation at the coastal Antarctic sea ice edge.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 97 papers.
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97 citing papers in PubMed, 254 citations in OpenAlex.
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- Water mass specific genes dominate the Southern Ocean microbiome.Nature communications · 2026Article
- Functional complementarity between vitamin B1 and B12 metabolisms shapes seasonal marine microbial communities.The ISME journal · 2026Article
- The genome of Pleurosigma provides insights into the evolutionary adaptations of pelagic diatoms.DNA research : an international journal for rapid publication of reports on genes and genomes · 2026Article
- Models and co-culture experiments assess four mechanisms of phytoplankton-bacteria interactions.Nature microbiology · 2026Article
- Microbial succession and hydrocarbon-degrading potential in Arctic sea ice exposed to dispersed crude oil and chemical dispersant.FEMS microbes · 2026Article
- Genome-resolved biogeography of Phaeocystales, cosmopolitan bloom-forming algae.Nature communications · 2025Article
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- Particle-attached bacteria act as gatekeepers in the decomposition of complex phytoplankton polysaccharides.Microbiome · 2024Article
- Flexible BProceedings of the National Academy of Sciences of the United States of America · 2024Article
- Iron limitation of heterotrophic bacteria in the California Current System tracks relative availability of organic carbon and iron.The ISME journal · 2024Article
- Cross-domain diversity effects: linking diatom species richness, intraspecific richness, and biomass production to host-associated bacterial diversity.ISME communications · 2024Article
- Interactions between the nitrogen-fixing cyanobacteriumISME communications · 2024Article
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- Metallic micronutrients are associated with the structure and function of the soil microbiome.Nature communications · 2023Article
37 more citing papers are in PubMed but not listed here.
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Authors and funding
13 authors at 9 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Southern Ocean primary productivity plays a key role in global ocean biogeochemistry and climate. At the Southern Ocean sea ice edge in coastal McMurdo Sound, we observed simultaneous cobalamin and iron limitation of surface water phytoplankton communities in late Austral summer. Cobalamin is produced only by bacteria and archaea, suggesting phytoplankton-bacterial interactions must play a role in this limitation. To characterize these interactions and investigate the molecular basis of multiple nutrient limitation, we examined transitions in global gene expression over short time scales, induced by shifts in micronutrient availability. Diatoms, the dominant primary producers, exhibited transcriptional patterns indicative of co-occurring iron and cobalamin deprivation. The major contributor to cobalamin biosynthesis gene expression was a gammaproteobacterial population, Oceanospirillaceae ASP10-02a. This group also contributed significantly to metagenomic cobalamin biosynthesis gene abundance throughout Southern Ocean surface waters. Oceanospirillaceae ASP10-02a displayed elevated expression of organic matter acquisition and cell surface attachment-related genes, consistent with a mutualistic relationship in which they are dependent on phytoplankton growth to fuel cobalamin production. Separate bacterial groups, including Methylophaga, appeared to rely on phytoplankton for carbon and energy sources, but displayed gene expression patterns consistent with iron and cobalamin deprivation. This suggests they also compete with phytoplankton and are important cobalamin consumers. Expression patterns of siderophore- related genes offer evidence for bacterial influences on iron availability as well. The nature and degree of this episodic colimitation appear to be mediated by a series of phytoplankton-bacterial interactions in both positive and negative feedback loops.
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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.