Nutritional Ecology of Insect Herbivores

Insect herbivores occupy a central role in terrestrial ecosystems, linking plant production to higher trophic levels and influencing community composition. Nutritional ecology examines how the quantity and balance of dietary resources shape herbivore physiology, behaviour and population dynamics. Plants differ widely in their macronutrient content—proteins, carbohydrates and lipids—as well as in micronutrients and defensive secondary metabolites. To maintain homeostasis and optimise fitness traits such as growth, reproduction and immune function, insects employ behavioural strategies (selective feeding, compensatory intake) and physiological mechanisms (adjusted digestion, selective excretion). Conceptual frameworks such as nutritional geometry and ecological stoichiometry have been pivotal in mapping the multi-dimensional trade-offs herbivores face when balancing nutrient demands against plant nutritional landscapes. Variation in nutrient requirements underlies host-plant specificity, developmental plasticity and polyphenisms, with direct consequences for pest outbreaks and ecosystem services. Global change drivers—including elevated CO₂ and intensive land use—alter plant nutrient profiles, with cascading effects on herbivore performance, migratory tendencies and outbreak potential. A thorough understanding of these interactions is essential for predicting ecological responses to environmental change, improving pest management and conserving biodiversity.

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Nutritional Ecology of Insect Herbivores publication trend

The graph below shows the total number of articles in nutritional ecology of insect herbivores across all publications each year (not limited to Nature Index journals).

Technical terms

Macronutrient ratio: The proportion of dietary proteins, carbohydrates and lipids that influences growth, reproduction and survival.

Ecological stoichiometry: The study of the balance of multiple chemical elements (e.g. C, N, P) in ecological interactions and organismal homeostasis.

Nutritional geometry: A multidimensional framework that maps how animals regulate intake of multiple nutrients to achieve optimal fitness outcomes.

Holidic diet: A chemically defined diet with precisely known concentrations of individual nutrients, used to elucidate specific dietary effects.

Compensatory feeding: An increase in consumption rate to offset low quality or imbalanced nutrient content in available food.

References

1. How Nutrients Mediate the Impacts of Global Change on Locust Outbreaks. Annual Review of Entomology (2024).
2. A Drosophila holidic diet optimized for growth and development. Developmental Cell (2025).
3. Body mass and growth rates predict protein intake across animals. eLife (2024).