American Marten (Martes americana) occur in remote and structurally complex forests from the northern portions of Maine west to the Sierra Nevada’s and north throughout Canada. In New York, populations are primarily found within the Adirondack Mountains amongst high elevation conifer and mixed deciduous-conifer forests. To evaluate the impact of road networks on American marten in the Adirondacks, population cores were estimated using trapping data (n = 3,310) (Jensen & Humphries 2019). American marten cores were established at a threshold probability of occurrence ≥ 0.85. To evaluate potential movement between and among marten cores, linkages were generated using least cost paths (LCPs) and circuit theory models (Shirk & McCrae, 2013). Further interrogation of core linkages identified road network pinch points throughout the transportation network impeding movement among cores. To prioritize mitigation of pinch points, linkage priorities among marten cores were identified. These results identify and prioritize marten linkages and barriers across transportation infrastructure for practitioners wishing to improve passage of American marten among core habitats throughout the Adirondacks.
Circuit theory models