. The Canadian field-naturalist. 100 W Lake Winnipegosis ">er "'fit Figure \. Location of the peninsula studied. Red Deer Point in Lake Winnipegosis, Manitoba. phic feature is a 1- to 3-m-high levee along the lake- shore. Long-term data on the lake's water level are not available; however, local residents, several of whom have been in the area since the 1920s, claimed that the water level at the time of the study was as high as it ever had been. The vegetation consists of a mosaic of sedge and grass meadows interspersed with second-growth forest. Trembling Aspen (Populus iremuloid
. The Canadian field-naturalist. 100 W Lake Winnipegosis ">er "'fit Figure \. Location of the peninsula studied. Red Deer Point in Lake Winnipegosis, Manitoba. phic feature is a 1- to 3-m-high levee along the lake- shore. Long-term data on the lake's water level are not available; however, local residents, several of whom have been in the area since the 1920s, claimed that the water level at the time of the study was as high as it ever had been. The vegetation consists of a mosaic of sedge and grass meadows interspersed with second-growth forest. Trembling Aspen (Populus iremuloides) dom- inates the forest, but one finds large numbers of Bur Oak (Quenus macrocarpa). White Elm {Ulmusamer- icana). Red Ash (Fraxinuspennsylvanica), and a few White Spruce {Picea glauca). The soil is thin, averag- ing less than 10 cm. Meadows and woods occur in about equal proportions in the southern half of the peninsula; in the northern half, woods predominate. Nearly all the forest understory is grazed by cattle, although grazing is heavier in the southern half. About one-third of the meadows are fenced and used for hay. The even-aged stands of aspen in the northern third of the point have grown up after intensive log- ging in the 1920s and 1930s and a major fire in 1949. We sampled small mammals and ground beetles at three locations along the point in late June and early July of 1975 (Figure 2). The primary study areas were at Glory Harbor and Kristjanson's Farm. At both places small mammals were collected from meadows and aspen woods at each of two sites. Only one wood- land site was trapped at Robinson's Bay. Ground beetles were collected at all sites but only in the woods. At Glory Harbor beetle traps were placed in two patches of woods, one of which was nearly pure aspen, the other a mixture of aspen and ash. The dominant understory plant at both sites was Aralia nudicaulis, Wild Sarsaparilla. We tried to set traps at both sites in transects spanning the transition fr
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