Tree regeneration after fire: Aspen removal experiment, organic layer depth measurments 2001, 2002

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 organic layer depths (cm) sampled with a hand corer on 20 July 2001 and 12 July 2002. Measurements made on 16 August 2002 have been omitted because they are inconsistent with earlier measurements and probably reflect observer bias