Rewilding restores biodiversity by reinstating the ecological processes that sustain species, habitats, and ecosystem functions. Rather than focusing exclusively on planting species or creating reserves, rewilding prioritizes the return of natural dynamics such as predation, disturbance, dispersal, and hydrology so ecosystems can become self-regulating. Evidence from multiple research programs shows that restoring these processes can tilt degraded systems back toward more complex, biodiverse states when applied with ecological and social understanding.
How rewilding rebuilds ecological processes
Trophic rewilding—reintroducing or supporting predators and large herbivores—reduces runaway herbivore pressure and can allow woody and understory plants to recover, with cascading benefits for insects, birds, and soil organisms. Work by William J. Ripple at Oregon State University and Robert L. Beschta at Oregon State University documents how restoring large carnivores alters herbivore behavior and abundance, which in turn can promote vegetation recovery. Complementary research by Frans Vera at Wageningen University argues that large herbivores historically maintained mosaic landscapes in parts of Europe, creating habitat heterogeneity that supports high species richness. Reintroductions of ecosystem engineers such as beavers illustrate another pathway: Michael C. Naiman at University of Washington has documented how beaver activity reshapes hydrology, creates wetlands, and boosts aquatic and riparian biodiversity. These process-based changes often yield more resilient and self-sustaining ecosystems than repeated, human-managed interventions.
Social and territorial dimensions of rewilding
Restoration through rewilding does not occur in an ecological vacuum. Land tenure, livelihoods, cultural values, and governance determine whether rewilding is accepted, equitable, and durable. Jens-Christian Svenning at Aarhus University emphasizes the need to align rewilding with regional land-use histories and local priorities, especially where pastoralism or smallholder grazing remain central to cultures and economies. Disputes over predator reintroduction, for example, often reflect deeper issues of trust in institutions and compensation mechanisms for livestock losses. Incorporating Indigenous and local ecological knowledge can reduce conflict and improve outcomes by integrating long-standing land stewardship practices that promote biodiversity.
Rewilding also raises ecological nuances: not every species reintroduction will produce the desired cascade, and altered baseline conditions can lead to novel ecosystems. Richard J. Hobbs at University of Western Australia cautions that restoration goals must be pragmatic and adaptive because invasive species, climate change, and fragmented landscapes can limit traditional recovery trajectories. Monitoring, adaptive management, and clear governance frameworks are therefore essential components of successful rewilding.
When grounded in rigorous science and inclusive governance, rewilding can restore habitat complexity, reconnect fragmented populations, and rebuild food webs, yielding biodiversity gains and enhanced ecosystem services. The approach shifts conservation from static protection to dynamic process recovery, but its success depends on context-sensitive design, stakeholder engagement, and long-term institutional commitment.