Raphael and others 



Chapter 18 



Landscape-level Analysis of Habitat in Washington 



Sample Circular 



Landscape Around 



Survey Location 



Old-Growth 

 Large Sawtimber 

 Small Sawtimber 



Non-forest 

 or unknown 



LANDSCAPE INDICES: 

 Total area: 203 ha 

 Number of patches: 29 

 Mean patch size: 7.0 ha 

 Shannon's Diversity Index: 

 Contagion: 123 % 

 Total edge: 20,100 meters 



1.20 



OLD-GROWTH INDICES: 

 Total number of patches: 6 

 Total area: 46 ha 

 Mean patch size: 7.7 ha 

 Mean Shape Index: 1.37 

 Mean Nearest Neighbor: 134 meters 



LARGE SAWTIMBER INDICES: 

 Total number of patches: 10 

 Total area: 30 ha 

 Mean patch size: 3.0 ha 

 Mean Shape Index: 1.27 

 Mean Nearest Neighbor: 161 meters 



Meters 



Data Source: 



350 



Eby and Snyder (1990) 

 06 May 94 



Figure 2 Example of forest cover classification within a 203-ha circular area surrounding a Marbled Murrelet 

 survey location. Forest cover from classification by Washington Department of Fish and Wildlife (Eby and Snyder 

 1990). See table 5 for explanation of landscape indices. 



182 



USDA Forest Service Gen. Tech. Rep. PSW-152. 1995. 



