Invasive Amphibian Ecology and Management

Invasive amphibians are among the most impactful non-native species in freshwater and terrestrial ecosystems worldwide. Their establishment often leads to predation on native fauna, competition for critical resources and the transmission of novel pathogens that can precipitate local extinctions. Management strategies span early detection, risk assessment, habitat suitability modelling and targeted removal campaigns. Recent advances have seen the integration of environmental DNA surveys, mechanistic spread models and machine-learning tools to predict invasion fronts and optimise control measures. Key challenges include the cryptic nature of larval stages, multiple introduction pathways—from the live trade for consumption and pet markets to accidental releases—and the influence of extreme weather events on both persistence and eradication success. Interdisciplinary research combining field monitoring, spatial analytics and genomic techniques is now informing adaptive management frameworks. Demonstrations of successful landscape-scale eradication underscore the potential for well-coordinated interventions to restore ecosystem function, reduce disease reservoirs and bolster recovery of imperilled native species.

Research from Nature Portfolio

One study adopted elementary cellular automata to capture the temporal spread of American bullfrogs across regional clusters, then trained a convolutional neural network on these patterns to forecast invasion trajectories. By overlaying predicted spread intensity with habitat-suitability maps derived from ecological niche models, researchers classified areas into rapidly expanding, stable, slowly spreading and declining populations. This combined mechanistic–statistical approach offers a novel predictive framework for anticipating future invasion hotspots and prioritising management resources.

Invasive Amphibian Ecology and Management publication trend

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

Technical terms

Environmental DNA (eDNA): Fragments of genetic material released into water or soil by organisms, used to detect presence without physical capture.

Chytrid Fungus: Waterborne fungal pathogens (notably Batrachochytrium dendrobatidis) responsible for widespread amphibian declines.

Ranaviruses: DNA viruses infecting amphibians, fish and reptiles, often causing rapid die-offs in wild populations.

Cellular Automata: Spatial simulation models in which grid cells update states according to local interaction rules, employed to recreate invasion dynamics.

Convolutional Neural Network (CNN): A deep-learning architecture designed to recognise spatial and temporal patterns, applied here to predict future species spread.

References

1. Successful eradication of invasive American bullfrogs leads to coextirpation of emerging pathogens. Conservation Letters (2023).
2. The alien marsh frog cocktail: Distribution, causes and pathways of a global amphibian invasion. Biological Conservation (2025).
3. Assessment of American Bullfrog (Lithobates catesbeianus) spreading in the Republic of Korea using rule learning of elementary cellular automata. Scientific Reports (2024).
4. Effective removal of the American bullfrog (Lithobates catesbeianus) on a landscape level: long term monitoring and removal efforts in Yosemite Valley, Yosemite National Park. Biological Invasions (2019).