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Population transcriptogenomics highlights impaired metabolism and small population sizes in tree frogs living in the Chernobyl Exclusion zone

ABSTRACT: Population transcriptogenomics highlights impaired metabolism and small population sizes in tree frogs living in the Chernobyl Exclusion zone

PROVIDER: PRJNA868750 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR21018700_1.fastq.gz	Fastqsanger.gz
	SRR21018700_2.fastq.gz	Fastqsanger.gz
	SRR21018701_1.fastq.gz	Fastqsanger.gz
	SRR21018701_2.fastq.gz	Fastqsanger.gz
	SRR21018702_1.fastq.gz	Fastqsanger.gz

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Population transcriptogenomics highlights impaired metabolism and small population sizes in tree frogs living in the Chernobyl Exclusion zone

Project description:Functional modifications shape the ability of populations to cope with anthropogenic environmental changes. These modifications are mediated by complex interactions between transmitted and non-transmitted changes which limit their prediction. To study how these changes are intertwined with evolutionary processes in a case of persistent anthropogenic environmental change, we characterized population structure, genetic diversity and individual response on gene expression of the tree frog Hyla orientalis along a gradient of radioactive contamination around the Chernobyl nuclear power plant. We detected lower effective population size in populations most exposed to ionizing radiation that is not compensated by migrations from surrounding areas. We also highlight a decreased body condition of frogs living in the most contaminated area, a peculiar transcriptomics signature and stop-gained mutations in genes involved in energy metabolism. Population most exposed to ionizing radiation in the Chernobyl exclusion zone experience both genetic drift and functional changes that collectively point towards deleterious effects of ionizing radiation on tree frogs and potential difficulty to adapt to this novel environment.

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The dogs of Chernobyl: demographic insights into populations inhabiting the nuclear exclusion zone

Project description:The 1986 Chernobyl nuclear disaster initiated a series of catastrophic events resulting in long-term and widespread environmental contamination. We characterize the genetic structure of 302 dogs representing three free-roaming dog populations living within the power plant itself, or 15-45 km from the disaster site. Genome-wide profiles from Chernobyl, purebred, and free-breeding dogs world-wide reveal that the individuals from the power plant and Chernobyl City are genetically distinct, with the former displaying increased intrapopulation genetic similarity and differentiation. Analysis of shared ancestral genome segments highlights differences in the extent and timing of western breed introgression. Kinship analysis reveals 15 families, with the largest spanning all collection sites within the radioactive exclusion zone, reflecting migration of dogs between the power plant and Chernobyl City. This study presents the first characterization of a domestic species in Chernobyl, establishing their relevance for genetic studies into the effects of exposure to long-term, low-dose ionizing radiation.

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Population transcriptogenomics highlights impaired metabolism and small population sizes in tree frogs living in the Chernobyl Exclusion Zone.

Project description:BackgroundIndividual functional modifications shape the ability of wildlife populations to cope with anthropogenic environmental changes. But instead of adaptive response, human-altered environments can generate a succession of deleterious functional changes leading to the extinction of the population. To study how persistent anthropogenic changes impacted local species' population status, we characterised population structure, genetic diversity and individual response of gene expression in the tree frog Hyla orientalis along a gradient of radioactive contamination around the Chernobyl nuclear power plant.ResultsWe detected lower effective population size in populations most exposed to ionizing radiation in the Chernobyl Exclusion Zone that is not compensated by migrations from surrounding areas. We also highlighted a decreased body condition of frogs living in the most contaminated area, a distinctive transcriptomics signature and stop-gained mutations in genes involved in energy metabolism. While the association with dose will remain correlational until further experiments, a body of evidence suggests the direct or indirect involvement of radiation exposure in these changes.ConclusionsDespite ongoing migration and lower total dose rates absorbed than at the time of the accident, our results demonstrate that Hyla orientalis specimens living in the Chernobyl Exclusion Zone are still undergoing deleterious changes, emphasizing the long-term impacts of the nuclear disaster.

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