Tree regeneration after fire: Aspen removal experiment, aboveground biomass of seedlings from sown seed

This research was intended to address the general question of whether asexual stem regeneration of trembling aspen (Populus tremuloides Michx.) reduces rates of establishment and growth of potential invading conifer species during the initial years following fire. Interactions between aspen and conifers were studied under natural conditions in a burned aspen stand with a high potential for aspen re-sprouting. The study contributes to our understanding of whether competitive interactions between tree seedlings are likely to help maintain deciduous stands across disturbance cycles by reducing the potential for successful conifer establishment. Data are total aboveground biomass (g dry weight) of seedlings derived from sown seed (leaves and stems combined). Values are averages of all seedlings in a plot. In control plots, BS and WS were pooled (indicated as SPR).