Risk of viral spillover found to increase with a warming climate in High Arctic lake sediments RSocPublishing uOttawa HighArctic ClimateChange ViralSpillover Pandemic
By Pooja Toshniwal PahariaOct 24 2022Reviewed by Aimee Molineux In a recent study published in the Proceedings of the Royal Society B, researchers performed a combined metagenomic and cophylogenetic modeling analysis to evaluate the impact of climate change on viral spillover risks in the context of a changing High Arctic environment.
Between May 10 and June 10, 2017, sediment and soil cores were collected from Lake Hazen. The core samples were paired between these two environments for contrasting sediment and soil sites when possible. Soil samples were obtained from three regions in the seasonally dried riverbeds of the tributaries, the northern shore, and upstream of the freshwater lake. The corresponding lake sediment samples were separated into hydrological regimes based on their seasonal runoff volumes.
Genetics & Genomics eBook Compilation of the top interviews, articles, and news in the last year. Download a copy today The findings were unexpected since fungal biomass surpasses bacterial biomass in the Arctic environment, and eukaryote organisms are established as prime targets of RNA viruses. Most eukaryotic viral organisms primarily targeted fungi and plants, with proportions ranging between 62% and 92%.
Seasonal variations in water column turbidity could fragment the lake's habitat yearly, more so from 2007 onwards. The lake habitat fragmentation could create favorable spillover conditions based on the effect of coevolution. Fragmentation would create genetic flow barriers, increasing the genetic drift in finite populations and accelerating the virus and host coevolution.
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