. The Canadian field-naturalist. Natural history. 2001 Barnes and Mallik: Effects of Beaver Herbivory 11. 48'05 0 2 4 6 8^ i i i i iKm Figure 1. The Swanson River drainage basin study area with the location of recently active (A), recently abandoned (R), and old abandoned (O) Beaver impoundments sampled. Location of the Chapleau Crown Game Preserve study area in Ontario is shown in the inset. Also included is the network of gravel roads (solid dark lines) and areas logged between 1975 - 1985, § and 1985 - 1995, W\. width and length of 40 m and 170 m, respectively (Barnes and Mallik 1997) (Figu
. The Canadian field-naturalist. Natural history. 2001 Barnes and Mallik: Effects of Beaver Herbivory 11. 48'05 0 2 4 6 8^ i i i i iKm Figure 1. The Swanson River drainage basin study area with the location of recently active (A), recently abandoned (R), and old abandoned (O) Beaver impoundments sampled. Location of the Chapleau Crown Game Preserve study area in Ontario is shown in the inset. Also included is the network of gravel roads (solid dark lines) and areas logged between 1975 - 1985, § and 1985 - 1995, W\. width and length of 40 m and 170 m, respectively (Barnes and Mallik 1997) (Figure 2). We randomly chose three shoreline locations within the sampling plot. At each of these locations, a 1 m X 40 m belt transect was established perpendicular to the impoundment's edge. Each transect was sub-divided into 40 - 1 m X 1 m sub-plots (Figure 2). We mea- sured all Beaver-cut stumps and uncut stems with diameters > cm along the 24 - belt transects of the eight recently active impoundments. Diameter measurements of Beaver stumps were measured at the point cutting was initiated. For standing trees and shrubs, diameters were taken 30 cm above the ground (Johnston and Naiman 1990; Barnes and Mallik 1996). Because of the low number of cut stems encountered in each transect, the total stem. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Ottawa Field-Naturalists' Club. Ottawa, Ottawa Field-Naturalists' Club
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