TABLE 1.
Present (2012–2018 average) and projected (decadal averages) future suitable habitat during the calving and post‐calving seasons for the Porcupine Caribou Herd. The percent change was calculated between present delineated habitat and the 2050s projected habitat. The area was calculated from average suitability values and does not represent the total suitable area among years. Suitable habitat is shown for different jurisdictional boundaries including that within Alaska, Yukon, the Arctic National Wildlife Refuge (ANWR), the management units within ANWR (1002 Area and Wilderness Area), and Ivvavik National Park
| Season | Boundary | Average annual habitat area (km2) | ||||
|---|---|---|---|---|---|---|
| Present | 2030s | 2040s | 2050s | % Change | ||
| Calving | Alaska | 1829.6 | 2542.3 | 3541.3 | 3935.4 | 115.1 |
| ANWR | 1824.4 | 2486.9 | 3541.3 | 3934.5 | 115.7 | |
| 1002 area | 316.3 | 922.4 | 1522.1 | 1673.5 | 429.2 | |
| Wilderness area | 1507.9 | 1564.3 | 2014.5 | 2255.3 | 49.6 | |
| Yukon | 1647.4 | 1760.4 | 1497.7 | 1128.2 | −31.5 | |
| Ivvavik National Park | 1511.8 | 1672.1 | 1438.3 | 1103.9 | −27.0 | |
| Total | 3477.0 | 4302.7 | 5038.9 | 5063.6 | 45.6 | |
| Post‐calving | Alaska | 4902.1 | 4769.8 | 5516.5 | 4699.9 | −4.1 |
| ANWR | 4898.8 | 4746.6 | 5440.7 | 4645.0 | −5.2 | |
| 1002 Area | 2388.8 | 1968.9 | 3189.1 | 3232.6 | 35.3 | |
| Wilderness area | 2507.6 | 2769.5 | 2248.9 | 1388.6 | −44.6 | |
| Yukon | 584.3 | 881.9 | 177.7 | 72.3 | −87.6 | |
| Ivvavik National Park | 580.2 | 877.4 | 177.7 | 68.1 | −88.3 | |
| Total | 5486.4 | 5651.7 | 5694.2 | 4772.3 | −13.0 | |