Tree regeneration after fire: Effects of burn severity, CPCRW 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 on organic soil measurements for the site at CPCRW. Data are included from 3 measurement dates:
4 August 2000 (org. depth and pH)
23 July 2001 (org. depth, soil wet and dry weights, pH)
16 July 2002 (org. depth, sample volume, soil wet and dry weights)
Dry weights were obtained following drying in an oven for 48 hourse at 40-60 degrees C.

本研究探讨了火烧烈度对北方森林火烧后树木定植格局的影响。我们从5项独立野外实验中采集数据，这些实验针对加拿大育空地区中部以及美国阿拉斯加内陆的4处火烧迹地中不同火烧烈度下的幼苗定植情况展开研究。本实验聚焦4种常见乔木的萌发、存活与生长响应，分别为颤杨（Populus tremuloides）、扭叶松（Pinus contorta）、白云杉（Picea glauca）以及黑云杉（Picea mariana）。各采样点同时采集了土壤有机层相关数据，包括厚度、湿度、容重与pH值。

本文件包含CPCRW样地土壤有机层的详细测定数据，共涵盖3个采样日期的结果：
2000年8月4日（测定有机层厚度与pH值）
2001年7月23日（测定有机层厚度、土壤鲜重与干重、pH值）
2002年7月16日（测定有机层厚度、样品体积、土壤鲜重与干重）
土壤干重通过将样品置于40~60℃烘箱中烘干48小时后测得。