Genetic Structure and Dynamics in Bat Populations

Bats display a remarkable capacity for mobility and social complexity, yet many species exhibit subtle genetic structuring across their ranges. Patterns of gene flow in bat populations arise from a balance of dispersal behaviour, roost fidelity and landscape features. In temperate regions, seasonal migrations between summering and swarming or hibernation sites create mixing zones that can elevate genetic diversity at key communal sites. Conversely, island archipelagos and glacial refugia often foster distinct lineages or cryptic species through historical isolation. Modern genomic tools have revealed fine‐scale substructure invisible to traditional markers, uncovering regional clusters, asymmetric dispersal and evidence of past demographic expansions. Understanding these dynamics is critical not only for tracing evolutionary processes but also for guiding conservation measures under pressures such as habitat loss, climate change and wind‐turbine mortality. Integrating genetic insights with ecological and acoustic data can inform management of both resident and migratory species, ensuring that gene flow corridors and refugial hotspots are recognised and protected.

Research from Nature Portfolio

Recent genomic analyses in a widely distributed bent‐winged bat revealed that traditional microsatellite markers failed to detect subtle regional substructure across Europe. By contrast, high‐density single nucleotide polymorphism panels derived from restriction‐site associated DNA sequencing illuminated weak but significant differentiation among populations separated by Mediterranean peninsulas. The approach uncovered strong isolation by distance and limited sex‐biased dispersal, consistent with philopatric breeding and spatial partitioning of mating and rearing sites. These findings underscore the necessity of genomic SNP datasets to resolve fine‐scale genetic footprints left by both historical biogeography and contemporary social organisation in highly mobile bat species.

Genetic Structure and Dynamics in Bat Populations publication trend

The graph below shows the total number of articles in genetic structure and dynamics in bat populations across all publications each year (not limited to Nature Index journals).

Technical terms

Microsatellite marker: A short tandem repeat sequence in nuclear DNA used to assess genetic diversity and relatedness.

RAD‐seq: A genome‐reduction technique that sequences DNA adjacent to restriction sites to generate large numbers of SNP markers.

SNP (single nucleotide polymorphism): A single base‐pair variation in the genome that serves as a high‐resolution genetic marker.

Isolation by distance: A pattern in which genetic differentiation increases with geographic separation due to limited dispersal.

Philopatry: The tendency of individuals to return to or remain in their natal area for breeding.

Effective population size (Ne): The number of breeding individuals in an idealised population that would show the same level of genetic drift as the observed population.

References

1. Inferring genetic structure when there is little: population genetics versus genomics of the threatened bat Miniopterus schreibersii across Europe. Scientific Reports (2023).
2. The shaping of genetic variation in edge‐of‐range populations under past and future climate change. Ecology Letters (2013).
3. Acoustic and Genetic Data Can Reduce Uncertainty Regarding Populations of Migratory Tree-Roosting Bats Impacted by Wind Energy. Animals (2021).
4. Genetic diversity in migratory bats: Results from RADseq data for three tree bat species at an Ohio windfarm. PeerJ (2016).