Table 1. North Yukon Regional Land Use Plan integrated management area (IMA) zoning system and recommended cumulative effects (CE) indicator levels. Adapted from Yukon Government and Vuntut Gwitchin Government (2009).


IMA
zone		 Management
intent		 Description CE
indicator		 Cautionary
level †		 Critical
level
Zone I Lowest
development		 Very high ecological and heritage/cultural values within a sensitive biophysical setting. Maintaining ecological integrity and protecting heritage and cultural resources is the priority. All-season industrial infrastructure is discouraged. Surface
disturbance		 0.075% 0.1%
Linear
density
 		 0.075 km/km² 0.1 km/km²
Zone II Low
development		 High ecological and heritage/cultural values within a moderately sensitive biophysical setting. Maintaining ecological integrity, protecting heritage and cultural resources, and minimizing land use impacts is the priority. Surface
disturbance		 0.15% 0.2%
Linear
density
 		 0.15 km/km² 0.2 km/km²
Zone III Moderate
development		 Moderate ecological and heritage/cultural values within a moderately sensitive biophysical setting. Conservative levels of land use are consistent with Zone III objectives. Surface
disturbance		 0.375% 0.5%
Linear
density
 		 0.375 km/km² 0.5 km/km²
Zone IV Highest
development		 Lower ecological and heritage/cultural values within a moderately sensitive biophysical setting. Higher levels of land use are consistent with Zone IV objectives. Surface
disturbance		 0.75% 1.0%
Linear
density
 		 0.75 km/km² 1.0 km/km²

†Cautionary cumulative effects indicator level is established as 75% of the upper or critical level. Indicator levels are calculated for each landscape management unit of the Integrated Management Area.