Biomass of trees sampled across Canada as part of the Energy from the Forest Biomass (ENFOR) Program

In the early 1980’s, thousands of trees were destructively sampled across Canada by the Canadian Forest Service (CFS) as part of the ENergy from the FORest research (ENFOR) program with the objective to produce regional biomass equations for the most common tree species. The sampling was overseen by researchers in each of the CFS’s five regional establishments. In the early 2000’s, following a request by Canada’s National Forest Inventory, the original ENFOR data was recovered from regional archives, assembled and homogenized for the purpose of creating national biomass equations for Canada’s most common tree species. The equations were published in two installments. The first (Lambert et al, 2005), covered all of Canada except British Columbia for which the ENFOR data had not been recovered at the time of publication. The second (Ung et al, 2008), contains equations for the British Columbia-specific species, and modified equations for other Canadian tree species that had also been sampled in British Columbia. These publications also contain detailed information about the original tree sampling and sample processing and the original ENFOR reports. This dataset contains the oven dry mass of four separate tree compartments for nearly 9,000 trees belonging to 33 different species. The four compartments are: stem wood, stem bark, branches, and foliage and twigs. Results of compilation, calculations and corrections are also contained in this dataset.

20世纪80年代初，加拿大林业服务处（Canadian Forest Service, CFS）为推进“森林能源（ENergy from the FORest, ENFOR）”研究计划，在加拿大全境开展破坏性树木采样，累计采集数千棵样本，旨在为当地常见树种构建区域生物量方程。该采样工作由加拿大林业服务处下辖的5个区域分支机构的研究人员分别统筹监管。21世纪初，应加拿大国家森林清查项目的请求，研究人员从各区域档案馆中找回了ENFOR项目的原始数据，并对其进行整合与同质化处理，以建立适用于加拿大全国范围常见树种的生物量方程。相关研究成果分两卷发表：第一卷（Lambert 等人，2005）覆盖了除不列颠哥伦比亚省外的加拿大全境——因发表时尚未获取该省的ENFOR项目数据；第二卷（Ung 等人，2008）则收录了针对不列颠哥伦比亚省特有树种的生物量方程，以及针对该省曾参与采样的其他加拿大树种的修正版生物量方程。上述两篇出版物还详细记载了原始树木采样、样本处理流程，以及ENFOR项目的原始报告内容。本数据集包含33个不同树种的近9000棵树木的4个独立组分的烘干干重，四个组分分别为：树干木质部、树干树皮、枝条以及叶片与细枝。此外，数据集还收录了数据整合、计算与校正的相关结果。