. The Canadian field-naturalist. 1988 SCHEINER, SHARIK, ROBERTS, AND KOPPLE: TREE RECRUITMENT 637 4-1 ,3- ^2'. 1 T" -1 0 —r 1 —1 2 1 3 —r- 4 —1 5 Years after fire Figure I. Total stem density prior to clear-cutting (yr -1), following clear-cutting but prior to the fire (yr 0 = 1980), and for the first five years (yrs 1 -5) after fire. Bars equal one S. E. the site. The other species were negatively affected by the fire. Red Oak and Paper Birch stumps resprouted at 48% and 20%, respectively, of their pre-fire sprouting densities. Most of the Service- berry stems were completely killed and
. The Canadian field-naturalist. 1988 SCHEINER, SHARIK, ROBERTS, AND KOPPLE: TREE RECRUITMENT 637 4-1 ,3- ^2'. 1 T" -1 0 —r 1 —1 2 1 3 —r- 4 —1 5 Years after fire Figure I. Total stem density prior to clear-cutting (yr -1), following clear-cutting but prior to the fire (yr 0 = 1980), and for the first five years (yrs 1 -5) after fire. Bars equal one S. E. the site. The other species were negatively affected by the fire. Red Oak and Paper Birch stumps resprouted at 48% and 20%, respectively, of their pre-fire sprouting densities. Most of the Service- berry stems were completely killed and both Eastern White Pine and Red Pine were completely ehminated from the study plots. A few small individuals of Eastern White Pine survived outside the plots in patches bypassed by the fire. In the subsequent four years (1982-1985) there was little change in the relative densities of the species (Table 1), although total stem density decreased by 41% (Figure 1). Only Serviceberry and Paper Birch had high survivorship and they accounted for a small percentage of total stems (Table 2). The species with the highest stem recruitment rates were Pin Cherry, Serviceberry, and Paper Birch (Table 2). Genets of Red Maple, Serviceberry, Paper Birch, and Red Oak survived the fire as stump and root systems that resprouted the following year (Table 3). There was no additional mortality of those genets in the four years following the fire. Bigtooth Aspen and Trembling Aspen also resprouted, but it was not possible to determine the number of individual genets. The recruitment of new genets as measured by mapping occurred in only Red Oak, Pin Cherry, and Serviceberry (Table 3). There were as many or more new genets recruited in these species as old genets surviving the fire. In addition, two seedlings (13 genets/ha) of Paper Birch were noted in unmapped quadrats. All such recruitment was either by dispersal from outside the site or by seeds in the seed bank as no individuals on the site
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