Genetic Diversity Assessment in Wildlife Conservation

Genetic diversity underpins the adaptive capacity and long-term viability of wildlife populations by maintaining variation in traits that confer resilience to environmental change. Assessment of genetic diversity in conservation contexts encompasses the measurement of allele frequencies, heterozygosity and lineage diversity across spatial and temporal scales. Methods range from single-locus mitochondrial markers to multilocus nuclear markers such as microsatellites and single-nucleotide polymorphisms, and increasingly employ genome-wide sequencing and environmental DNA to detect hidden diversity in remote or elusive species. Integrating genetic measures with demographic and ecological data allows practitioners to identify populations at risk of inbreeding depression, monitor genetic erosion, prioritise conservation units and design strategies to maintain connectivity and adaptive potential in the face of habitat fragmentation, climate change and other anthropogenic pressures.

Research from Nature Portfolio

Recent studies have mapped global patterns of insect mitochondrial genetic diversity, revealing that both average diversity and evenness peak in subtropical regions and correlate with temperature and long-term climate stability. These macrogenetic insights, derived from over two million barcoded sequences, demonstrate the power of large-scale single-locus data to inform conservation of the most species-rich animal group. In Europe, novel evaluations of genetic monitoring effort across multiple taxa highlight substantial geographic and policy-driven gaps, particularly at climate-change margins where trailing-edge populations harbour unique adaptive variation. Foundational work on life-history traits across thousands of plant and animal populations has shown that contemporary climate factors and species traits jointly shape genetic diversity worldwide, emphasising the value of peripheral populations for broad-scale conservation strategies.

Genetic Diversity Assessment in Wildlife Conservation publication trend

The graph below shows the total number of articles in genetic diversity assessment in wildlife conservation across all publications each year (not limited to Nature Index journals).

Technical terms

Allele frequency: The relative proportion of different gene variants (alleles) within a population.

Environmental DNA (eDNA): Genetic material obtained directly from environmental samples (soil, water) without capturing organisms.

Genetic evenness: A measure of how uniformly genetic variants are distributed within a population or assemblage.

Microsatellite: A short, repetitive DNA sequence used as a marker for assessing genetic variation.

Single-nucleotide polymorphism (SNP): A variation at a single base pair in the genome, widely used in genome-wide diversity studies.

References

1. Global determinants of insect mitochondrial genetic diversity. Nature Communications (2023).
2. Monitoring of species’ genetic diversity in Europe varies greatly and overlooks potential climate change impacts. Nature Ecology & Evolution (2024).
3. Life history, climate and biogeography interactively affect worldwide genetic diversity of plant and animal populations. Nature Communications (2021).
4. Leveraging genomes to support conservation and bioeconomy policies in a megadiverse country. Cell Genomics (2024).
5. Genetic diversity targets and indicators in the CBD post-2020 Global Biodiversity Framework must be improved. Biological Conservation (2020).
6. Molecular ecology meets systematic conservation planning. Trends in Ecology & Evolution (2022).