Population Genetics and Conservation of Amphibians

Amphibian populations worldwide are experiencing unprecedented declines driven by habitat loss, emerging diseases and climate change. Population genetics offers critical insights into levels of genetic diversity, population structure and connectivity, informing conservation strategies that maintain or enhance evolutionary potential. By analysing neutral markers and adaptive loci, researchers can identify isolated or inbred populations at greatest risk, detect local adaptations to environmental stressors and delineate units for targeted management. Such genetic data underpin practical measures—including the choice of source and recipient populations for translocations, the design of reserves to maximise gene flow and the prioritisation of captive‐breeding programmes—to bolster resilience and long‐term viability across diverse amphibian taxa.

Research from Nature Portfolio

A study of a critically endangered frog rediscovered after decades of presumed extinction employed newly developed microsatellite markers to estimate both effective population size and census size at a single site. Despite a very small number of breeding adults, genetic analyses revealed unexpectedly high allelic richness and low inbreeding coefficients. This anomaly suggests either genetic rescue from unsurveyed neighbouring populations or recent admixture among previously isolated lineages. The findings underscore the importance of exhaustive field surveys and genetic monitoring to uncover hidden reservoirs of diversity and guide urgent conservation actions for relict amphibian populations.

Population Genetics and Conservation of Amphibians publication trend

The graph below shows the total number of articles in population genetics and conservation of amphibians across all publications each year (not limited to Nature Index journals).

Technical terms

Genetic diversity: Variation in DNA sequences among individuals, crucial for adaptive potential and population resilience.

Effective population size (Ne): The size of an idealised population experiencing the same rate of genetic drift as the real population.

Microsatellites: Short, tandem DNA repeats used as neutral genetic markers to assess variability and structure.

Single nucleotide polymorphism (SNP): A single base‐pair variation in the genome, widely used in high‐resolution population analyses.

Evolutionary significant unit (ESU): A genetically distinct population or group of populations warranting separate conservation management.

Heterozygosity: The presence of different alleles at a locus in an individual, indicating genetic variation within populations.

References

1. A decision-making framework to maximise the evolutionary potential of populations - Genetic and genomic insights from the common midwife toad (Alytes obstetricans) at its range limits. Heredity (2024).
2. Conservation genomics of an endangered montane amphibian reveals low population structure, low genomic diversity and selection pressure from disease. Molecular Ecology (2023).
3. Conservation genetics of the yellow-bellied toad (Bombina variegata): population structure, genetic diversity and landscape effects in an endangered amphibian. Conservation Genetics (2021).
4. Population genetic analysis of the recently rediscovered Hula painted frog (Latonia nigriventer) reveals high genetic diversity and low inbreeding. Scientific Reports (2018).
5. Evolutionary principles guiding amphibian conservation. Evolutionary Applications (2020).