Invasive Wild Pig Ecology and Management

Invasive wild pigs (Sus scrofa) rank among the most pervasive and destructive vertebrate invaders worldwide. Their ecological success stems from marked behavioural and physiological plasticity, enabling rapid colonisation of diverse habitats, from wetlands and forests to agricultural landscapes. As generalist omnivores, wild pigs exert profound impacts on native flora and fauna through rooting, wallowing and predation, notably preying on ground-nesting birds, reptiles and amphibians. Their foraging disturbances alter soil structure, nutrient cycling and plant community composition, often amplifying erosion and facilitating invasive plant establishment. Simultaneously, wild pigs pose serious agricultural and economic threats, causing trampling and depredation of crops and transmitting a suite of livestock and zoonotic pathogens. Management strategies have evolved to integrate landscape-scale surveillance, predictive modelling of spread, targeted removal, barrier establishment and disease risk mitigation. Recent advances emphasise the need for multi-scale approaches that account for spatio-temporal variation in movement and resource selection, the interplay of biotic and abiotic drivers of density, and the economic valuation of intervention programmes to prioritise resource allocation and safeguard ecological and agricultural assets.

Research from Nature Portfolio

Recent studies using high-throughput DNA metabarcoding of wild pig faecal samples have revealed extensive seasonal variation in diet composition, highlighting amphibians as the most frequently consumed vertebrate group in certain wetland-rich landscapes. These findings underscore potential risks to vulnerable amphibian populations and the importance of integrating dietary analysis into impact assessments. Seminal modelling work has also advanced understanding of broad-scale population density patterns by demonstrating that both biotic factors (agricultural intensity, vegetation cover, predator richness) and abiotic factors (precipitation, evapotranspiration) synergistically predict wild pig distribution. Incorporating diverse ecological covariates into species distribution models has markedly improved the accuracy of density forecasts and identified regions at imminent risk of invasion, informing proactive management.

Invasive Wild Pig Ecology and Management publication trend

The graph below shows the total number of articles in invasive wild pig ecology and management across all publications each year (not limited to Nature Index journals).

Technical terms

DNA metabarcoding: A molecular technique that uses universal primers and high-throughput sequencing to identify multiple taxa within environmental or faecal samples by analysing short genetic markers.

Generalist omnivore: A species that feeds on a wide variety of plant and animal matter, enabling flexibility in habitat use and resilience to resource fluctuations.

Home range: The area habitually used by an animal for essential activities such as foraging, resting and reproduction over a defined time period.

Isopleth: A contour line on a utilisation distribution map representing a specified percentage of an animal’s activity, such as the 90 % isopleth delineating the boundary of its home range.

Spatio-temporal scale: The combined spatial and temporal dimensions over which ecological processes and animal behaviours are analysed to capture variability across landscapes and seasons.

References

1. DNA metabarcoding reveals consumption of diverse community of amphibians by invasive wild pigs (Sus scrofa) in the southeastern United States. Scientific Reports (2023).
2. Biotic and abiotic factors predicting the global distribution and population density of an invasive large mammal. Scientific Reports (2017).
3. What drives wild pig (Sus scrofa) movement in bottomland and upland forests?. Movement Ecology (2024).
4. Comprehensive Economic Impacts of Wild Pigs on Producers of Six Crops in the South-Eastern US and California. Agriculture (2024).
5. Agricultural and Ecological Resources Safeguarded by the Prevention of Wild Pig Population Expansion. Biology (2024).