PLOS Biology

5 min read Original article ↗

Fungi and carbon retention in Arctic fjords

June 16, 2026

Fungi and carbon retention in Arctic fjords

Fungi act as critical biological carbon storage reservoirs in soil ecosystems, but what about marine sediments? Juan Carlos Trejos-Espeleta, William Orsi and colleagues show that marine fungi promote carbon storage in arctic fjord sediment, hot-spots of carbon sequestration that are currently experiencing rapid change due to climate warming. Don't miss the Primer by Marlis Reich.

Image credit: James Bradley

PLOS Biologue

Community blog for PLOS Biology, PLOS Genetics and PLOS Computational Biology.

PLOS BIOLOGUE

06/18/2026

Research Article

Microglial sema4ab squelches regenerative neurogenesis

Zebrafish can regenerate neurons after spinal cord injury, but the mechanisms influencing this ability remain unknown. Alberto Docampo-Seara, Catherina Becker, Thomas Becker and co-workers find that sema4ab, a protein expressed in lesion-reactive microglia, attenuates regenerative neurogenesis by directly regulating neural progenitors and altering cytokine signaling in the niche.

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Microglial sema4ab squelches regenerative neurogenesis

Recently Published Articles

06/18/2026

Short Reports

Cellular mechanisms of human learning

Understanding structural neuroplasticity in humans is challenging because in vivo methods rarely capture underlying cellular mechanisms driving learning-related brain changes. Guillermina Griffa, Susie Huang, Valeria Della-Maggiore and co-authors show that learning induces transient cell-body expansion and sustained increases in neurite density in motor regions, revealing temporal mechanisms of human structural plasticity.

Image credit: pbio.3003861

Cellular mechanisms of human learning

06/18/2026

Research Article

Additive genetic variation across the Tree of Life

Adaptive potential determines how populations respond to environmental change. Lillith Zijmers, Adam Eyre-Walker and colleagues compile evolvability estimates from over 170 multicellular species, revealing substantial variation across the tree of life, with plants exhibiting significantly higher adaptive potential than animals.

Image credit: pbio.3003819

Additive genetic variation across the Tree of Life

06/16/2026

Research Article

Ubiquitin-proteasome system and meiosis

Crossover formation ensures accurate homologous chromosome segregation and depends on tightly regulated pro-crossover protein levels during meiotic prophase I. Hongtao Zhang, Wenqing Liang, Meng Li, Ye Hong and co-workers show that the ubiquitin-proteasome system restricts crossover number by orchestrating pro-crossover protein dynamics and ensuring their timely dissociation from chromatin.

Ubiquitin-proteasome system and meiosis

Image credit: pbio.3003868

06/15/2026

Research Article

Aging, metabolism and brain–body health

Aging is known to drive changes in the brain and metabolic health, but it is less clear to what extent these effects are separable. By analyzing two large-scale datasets, Asa Farahani, Bratislav Misic and co-authors identify two axes of brain-body associations that are driven primarily by age or metabolic health.

Aging, metabolism and brain–body health

Image credit: pbio.3003856

06/15/2026

Research Article

The evolutionary history of TEFs

Transcription elongation factors (TEFs) associate with RNA Polymerase II to regulate gene expression and coordinate chromatin regulation and RNA processing. Alex Francette, Aakash Grover, Nathan Clark and Karen Arndt present an evolutionary analysis of ten core TEFs, showing that all ten originated in the Last Eucaryotic Common Ancestor and display both conserved and lineage-specific domains.

The evolutionary history of TEFs

Image credit: pbio.3003855

06/15/2026

Essay

Biotic interactions biogeography

Biogeography and ecology have long developed in parallel. This Essay explores how new data on species interactions across large scales now allow their integration, opening fresh insights into how biodiversity is shaped across Earth.

Biotic interactions biogeography

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06/10/2026

Community Page

Introducing COSIG

Investigating the integrity of published papers is key to the scientific process, but the necessary knowledge is in short supply. This Community Page presents COSIG, an open collection of meta-scientific guides enabling anyone to perform forensic peer review.

Introducing COSIG

Image credit: pbio.3003817

06/08/2026

Essay

What sets mutation rates?

Mutation rates per generation are strikingly consistent, suggesting a key role for natural selection in honing them. This Essay summarizes the patterns identified and outlines existing theories for how selection pressures might shape mutation rates in animal germline and soma.

What sets mutation rates?

Image credit: pbio.3003799

06/04/2026

Essay

Strain nomenclature for bacterial pathogens

Unified bacterial strain taxonomies are crucial. This Essay provides an overview of a novel bacterial strain taxonomy and describes how this system can be used in population biology and epidemiological surveillance of infectious diseases.

Strain nomenclature for bacterial pathogens

Image credit: pbio.3003781