Predation Dynamics in Terrestrial Ecosystems

Predation dynamics in terrestrial ecosystems encompass the processes by which predators locate, attack and consume prey, thereby regulating population densities, shaping community composition and mediating energy transfer across trophic levels. Predator assemblages range from vertebrates—birds, small mammals and reptiles—to a diverse array of invertebrates such as spiders, ants and beetles. Their hunting strategies, from active pursuit to sit-and-wait ambush, interact with habitat complexity, vegetation structure and seasonal variability to determine encounter and attack success. Land-use change, including agricultural intensification, bioenergy cropping and urban expansion, alters habitat structure and microclimate, often reducing predator diversity and compromising natural pest control services. Conversely, high plant species richness and structural heterogeneity can bolster predator communities and strengthen top-down control of herbivores. Advances in methodological approaches—from sentinel prey assays to molecular gut-content analysis and direct video surveillance—have enhanced our capacity to quantify predation rates in situ. A comprehensive understanding of terrestrial predation dynamics is vital for biodiversity conservation, sustainable agricultural management and the prediction of ecosystem responses to global environmental change.

Research from Nature Portfolio

Direct video monitoring in rice paddies has revealed critical shortcomings in conventional sentinel prey methods. By comparing the fate of dead, immobilised planthoppers with live, pinned and fully mobile individuals, researchers showed that long-horned grasshoppers were responsible for most removals of dead prey, whereas ground beetles targeted live but immobile pests and frogs dominated attacks on mobile planthoppers. This study uncovered a major mismatch between common sentinel approaches and actual predator behaviour, highlighting amphibians as key biocontrol agents in flooded rice ecosystems and calling for a reappraisal of field methods used to estimate natural predation rates.

Predation Dynamics in Terrestrial Ecosystems publication trend

The graph below shows the total number of articles in predation dynamics in terrestrial ecosystems across all publications each year (not limited to Nature Index journals).

Technical terms

Sentinel prey: Immobilised or artificial prey items deployed to record predator attack marks or removal events, used to estimate in situ predation rates.

Trophic complexity: The richness and interconnectivity of feeding interactions within a food web, involving multiple predator and prey species.

Top-down control: Regulation of ecosystem structure and function through predation, whereby predators limit prey populations and cascade effects through lower trophic levels.

Artificial prey models: Synthetic replicas of prey, often made from plasticine or similar materials, designed to capture evidence of predator attacks and foraging patterns.

References

1. Video monitoring of brown planthopper predation in rice shows flaws of sentinel methods. Scientific Reports (2017).
2. Smallholder agriculture in African dryland agroecosystems has limited impact on trophic group composition, but affects arthropod provision of ecosystem services. Agriculture Ecosystems & Environment (2024).
3. Pest suppression potential varies across 10 bioenergy cropping systems. GCB Bioenergy (2023).
4. Predation risk estimated on live and artificial insect prey follows different patterns. Ecology (2023).
5. Plant diversity increases predation by ground‐dwelling invertebrate predators. Ecosphere (2017).