Biodiversity enhancement: pine marten recovery
The reintroduction project began in autumn 2015, when 20 pine martens were relocated from Scotland to Wales, supplementing the remnant population. Second (19 individuals) and third groups (12 individuals) followed one and two years later. The 51 pine martens have since dispersed and are being monitored by the Vincent Wildlife Trust.
Biodiversity valuation: bird data collection
Pine martens feed on nesting birds and eggs, so the reintroduction of pine martens has the potential to affect songbird populations. To test this, bird data from the British Trust for Ornithology (BTO) was processed using Ecosulis’s proprietary Biodiversity Quality Calculator. This had been collected three times in the spring over a 20-year period by recording bird presence along transects in 1 km x 1 km squares.
Negligible impact on songbird populations
A change in songbird biomass was noted, which could be the result of pine marten predation on large birds such as wood pigeons. No change in the presence or absence of songbirds was observed, and the number of songbird species remained relatively constant throughout the monitoring period.