Mobile generalist consumers play a key role in structuring and stabilizing food webs by coupling diverse resources across heterogeneous landscapes. Analogously, human subsistence communities that rely on wild foods frequently forage across terrestrial, freshwater and marine food webs, coupling these habitats in space and time. As such, subsistence harvest behaviours may play a role in stabilizing food web interactions. Here, we develop novel theory on the role of wild food harvesting on food web stability by integrating human harvesters into a tri-trophic generalist model. We draw on recent empirical findings from coastal southeast Alaska that highlight the importance of harvest diversity and habitat coupling in structuring wild harvest patterns. We illustrate how these harvest patterns promote more consistent food harvest through time, as well as stabilize the population dynamics of harvested resources. Consistent with existing food web theory, our findings suggest that diverse harvest webs with few strong and numerous weak interactions (asymmetrical energy flow across habitats), can be highly stabilizing. Our analysis provides a novel modeling approach that integrates food web theory into coupled socio-ecological systems, furthering our understanding of how human’s reciprocal relationship with nature influences ecological stability.