How do mammal food webs vary across Africa?

Network analysis maps African mammal food webs

A new network-analysis study finds that the drivers of mammal food webs are not uniform across Africa. Rather than viewing ecosystem ecology as something that stays the same from place to place, the researchers used food-web structure—capturing who eats whom and how species connect—to compare patterns across different regions.

The key takeaway is that different ecological pressures appear to shape how mammal communities organize themselves. Food-web “drivers” can vary with geography and local environmental context, meaning that changes in vegetation, climate, habitat structure, and species composition can lead to different interaction networks even within the same continent.

This matters because food webs influence ecosystem stability and resilience. If the underlying drivers differ by region, conservation and forecasting efforts that rely on a single, continent-wide assumption about trophic structure may miss important local dynamics—like which species or interactions are most likely to amplify disturbance.

In practical terms, network-based approaches can help identify:

• Which interactions hold food webs together in particular regions
• Where cascades are more likely if a species declines
• How ecosystem change might propagate through predator–prey relationships

By shifting the focus from purely local anecdotes to continent-scale comparisons that still retain ecological nuance, the study provides a framework for understanding why mammal communities respond differently to environmental change. It also highlights that predicting ecological outcomes will likely require models that respect spatial heterogeneity rather than assuming one “universal” food-web pattern.