Figure 1
From: Large Omnivore Movements in Response to Surface Mining and Mine Reclamation
Mineral Disturbance Limits (MDLs) of two neighbouring open-pit coal mines (Luscar and Gregg River) in west-central Alberta, Canada where grizzly bear movement was investigated.
MDLs comprise all color-coded polygons depicting mining activity status. A buffer with 7.2 km radius was delineated around MDLs to separate bear movements on and in the vicinity of MDLs from those far from the MDLs (control). The buffer radius represents a distance equal to the 95th percentile of the greatest step length of GPS collared grizzly bears which used the MDLs at least once in the monitoring period. Two insets are provided for the median years of grizzly bear data availability: during (A-2001) versus after (B-2009) mining to illustrate the dynamic nature of mining activity. Four-hour path segments of a female grizzly bear with cubs (G023) are provided for 2001 and 2009 as an example. The map was generated in ArcGIS 10.1 (ESRI, Redlands, USA).
