Tree regeneration after fire: Effects of burn severity, Delta soil analysis

This study examines the effects of burn severity on patterns of post-fire tree establishment in the boreal forest. We collected data from 5 separate field experiments examining seedling establishment across different severity levels in 4 burns in central Yukon Territory, Canada, and interior Alaska, USA. The experimental studies focus on the germination, survival, and growth responses of four common tree species, trembling aspen (Populus tremuloides), lodgepole pine (Pinus contorta), white spruce (Picea glauca) and black spruce (Picea mariana). Data on the soil organic layer (depth, moisture, bulk density, pH) were also collected at each site. This file contains more detailed data from organic and mineral soil measurements made in the Delta 99 burn. Note that the file format differs from the CPCRW soil datafile. Information on warming manipulation plots at the Delta site are included here. Measurements of soil organic layer depth, wet weight, dry weight, %moisture, and pH are included for 4 sample dates. Some data are available only for one or two sample dates. Samples were taken with a 5-cm hand corer, except in 2001, where a 2-cm diameter corer was used. The sample dates are: 1 August 2000 17 July 2001 11 July 2002 17 July 2002