Research overview: wildlife crossings as climate and fragmentation adaptation for pumas

Wildlife overpasses and underpasses are increasingly used to reconnect carnivore populations split by highways, with high-profile projects designed for pumas. This overview surveys the evidence that crossings restore movement and gene flow, how their placement is informed by connectivity modeling and telemetry, and why reconnection matters both for relieving inbreeding and for letting populations shift as climate alters habitat. It reviews monitoring of crossing use and the long timescales over which genetic benefits accrue. The synthesis frames crossings as concrete adaptation infrastructure, illustrating how engineering interventions can keep fragmented landscapes permeable enough for wide-ranging cats to persist and to track changing conditions across human-dominated terrain.