Viruses direct carbon cycling in lake sediments under global change
Abstract
Global change is altering the vast amount of carbon cycled by microbes between land and freshwater, but how viruses mediate this process is poorly understood. Here, we show that viruses direct carbon cycling in lake sediments, and these impacts intensify with future changes in water clarity and terrestrial organic matter (tOM) inputs. Using experimental tOM gradients within sediments of a clear and a dark boreal lake, we identified 156 viral operational taxonomic units (vOTUs), of which 21% strongly increased with abundances of key bacteria and archaea, identified via metagenome-assembled genomes (MAGs). MAGs included the most abundant prokaryotes, which were themselves associated with dissolved organic matter (DOM) composition and greenhouse gas (GHG) concentrations. Increased abundances of virus-like particles were separately associated with reduced bacterial metabolism and with shifts in …
abstract: “Global change is altering the vast amount of carbon cycled by microbes between land and freshwater, but how viruses mediate this process is poorly understood. Here, we show that viruses direct carbon cycling in lake sediments, and these impacts intensify with future changes in water clarity and terrestrial organic matter (tOM) inputs. Using experimental tOM gradients within sediments of a clear and a dark boreal lake, we identified 156 viral operational taxonomic units (vOTUs), of which 21% strongly increased with abundances of key bacteria and archaea, identified via metagenome-assembled genomes (MAGs). MAGs included the most abundant prokaryotes, which were themselves associated with dissolved organic matter (DOM) composition and greenhouse gas (GHG) concentrations. Increased abundances of virus-like particles were separately associated with reduced bacterial metabolism and with shifts in …” authors:
- Lucas PP Braga
- Chloé Orland
- E_Emilson
- Amelia A Fitch
- Helena Osterholz
- Thorsten Dittmar
- Nathan Basiliko
- Nadia CS Mykytczuk
- Andrew J Tanentzap featured: false projects: [] publication: ‘Proceedings of the National Academy of Sciences’ publication_short: '' publication_types:
- “2” publishDate: ‘2022-10-11T00:00:00Z’ title: ‘Viruses direct carbon cycling in lake sediments under global change’ url_pdf: “https://www.pnas.org/doi/full/10.1073/pnas.2202261119" url_source: “https://www.pnas.org/doi/abs/10.1073/pnas.2202261119"
Erik J.S. Emilson
Research Scientist, Watershed Ecology Team Lead, Associate Editor CJFR
I am interested in how forests support freshwater ecosystem services. My research combines microbial and molecular approaches to undertand how forest productivity and disturbances affect ecosystem functions in headwater streams and lakes.