Hamer and Nelson 



Chapter 6 



Characteristics of Nest Trees and Nesting Stands 



Table 2 The mean, standard deviation, range, and sample size for the forest stand characteristics of Marbled Murrelet tree nests located in North America. 

 The Pacific Northwest data include nests located in California, Oregon, Washington, and British Columbia. For some characteristics, either no data were 

 available for that state or province, or the sample size was too small to calculate the mean and range. Sample sizes for each variable are shown in parenthesis 



Pet. composition low elevation trees 2 



Total tree density (number/ha; 



Distance to nearest opening (m) 



'Slope position codes: (1) lower 1/3, (2) middle 1/3, and (3) upper 1/3. 



2 Measure of the percent of western hemlock, Douglas-fir, western red cedar, Sitka spruce, and coastal redwood in a stand. 



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



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